BOBCAT 732 SKID STEER LOADER Service Repair Manual Instant Download

1
7 7
3 3
0 1
Service Manual
INCLUDES H SERIES
7 3
2
6556583 (479)
Printed in U.S.A.
? Melroe Company 1979
2
MAINTENANCE SAFETY
WARNING Instructions are necessary before operating or servicing machine. Read and understand the Operation Maintenance Manual, Operators Handbook and signs (decals) on machine. Follow warnings and instructions in the manuals when making repairs, adjustments or servicing. Check for correct function after adjustments, repairs or service. Untrained operators and failure to follow instructions can cause injury or death. W-2003-0903 Instructions are necessary before operating or servicing machine. Read and understand the Operation Maintenance Manual, Operators Handbook and signs (decals) on machine. Follow warnings and instructions in the manuals when making repairs, adjustments or servicing. Check for correct function after adjustments, repairs or service. Untrained operators and failure to follow instructions can cause injury or death. W-2003-0903 Instructions are necessary before operating or servicing machine. Read and understand the Operation Maintenance Manual, Operators Handbook and signs (decals) on machine. Follow warnings and instructions in the manuals when making repairs, adjustments or servicing. Check for correct function after adjustments, repairs or service. Untrained operators and failure to follow instructions can cause injury or death. W-2003-0903
Safety Alert Symbol This symbol with a warning statement, means Warning, be alert! Your safety is involved! Carefully read the message that follows. Safety Alert Symbol This symbol with a warning statement, means Warning, be alert! Your safety is involved! Carefully read the message that follows. Safety Alert Symbol This symbol with a warning statement, means Warning, be alert! Your safety is involved! Carefully read the message that follows. Safety Alert Symbol This symbol with a warning statement, means Warning, be alert! Your safety is involved! Carefully read the message that follows.
CORRECT B-10731a CORRECT B-12365 CORRECT B-7469 CORRECT B-7469
Never service the Bobcat Skid- Steer Loader without instructions. Use the correct procedure to lift or lower operator cab. Cleaning and maintenance are required daily. Cleaning and maintenance are required daily.
WRONG B-11799 WRONG B-15231 WRONG B-15280 WRONG B-15280
Have good ventilation when welding or grinding painted parts. Wear dust mask when grinding painted parts. Toxic dust and gas can be produced. Avoid exhaust fume leaks which can kill without warning. Exhaust system must be tightly sealed. Disconnecting or loosening any hydraulic tubeline, hose, fitting, component or a part failure can cause lift arms to drop. Do not go under lift arms when raised unless supported by an approved lift arm support device. Replace it if damaged. Never work on loader with lift arms up unless lift arms are held by an approved lift arm support device. Replace if damaged. Never modify equipment or add attachments not approved by Bobcat Company. Never work on loader with lift arms up unless lift arms are held by an approved lift arm support device. Replace if damaged. Never modify equipment or add attachments not approved by Bobcat Company.
WRONG B-6590 WRONG B-6580 WRONG B-6589 WRONG B-6589
Stop, cool and clean engine of flammable materials before checking fluids. Never service or adjust loader with the engine running unless instructed to do so in the manual. Avoid contact with leaking hydraulic fluid or diesel fuel under pressure. It can penetrate the skin or eyes. Never fill fuel tank with engine running, while smoking or when near open flame. Keep body, jewelry and clothing away from moving parts, electrical contact, hot parts and exhaust. Wear eye protection to guard from battery acid, compressed springs, fluids under pressure and flying debris when engines are running or tools are used. Use eye protection approved for type of welding. Keep rear door closed except for service. Close and latch door before operating the loader. Lead-acid batteries produce flammable and explosive gases. Keep arcs, sparks, flames and lighted tobacco away from batteries. Batteries contain acid which burns eyes or skin on contact. Wear protective clothing. If acid contacts body, flush well with water. For eye contact flush well and get immediate medical attention. Lead-acid batteries produce flammable and explosive gases. Keep arcs, sparks, flames and lighted tobacco away from batteries. Batteries contain acid which burns eyes or skin on contact. Wear protective clothing. If acid contacts body, flush well with water. For eye contact flush well and get immediate medical attention.
Maintenance procedures which are given in the Operation Maintenance Manual can be performed by the owner/ operator without any specific technical training. Maintenance procedures which are not in the Operation Maintenance Manual must be performed ONLY BY QUALIFIED BOBCAT SERVICE PERSONNEL. Always use genuine Bobcat replacement parts. The Service Safety Training Course is available from your Bobcat dealer. Maintenance procedures which are given in the Operation Maintenance Manual can be performed by the owner/ operator without any specific technical training. Maintenance procedures which are not in the Operation Maintenance Manual must be performed ONLY BY QUALIFIED BOBCAT SERVICE PERSONNEL. Always use genuine Bobcat replacement parts. The Service Safety Training Course is available from your Bobcat dealer. Maintenance procedures which are given in the Operation Maintenance Manual can be performed by the owner/ operator without any specific technical training. Maintenance procedures which are not in the Operation Maintenance Manual must be performed ONLY BY QUALIFIED BOBCAT SERVICE PERSONNEL. Always use genuine Bobcat replacement parts. The Service Safety Training Course is available from your Bobcat dealer. MSW01-0805
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CONTENTS
PREVENTIVE MAINTENANCE
PREVENTIVE MAINTENANCE . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
11 HYDRAULIC SYSTEM . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . 21 HYDROSTATIC SYSTEM . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . 31 DRIVE SYSTEM . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . 41 MAIN FRAME .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
51 ELECTRICAL SYSTEM . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 61 ENGINE SERVICE . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . 71 TECHNICAL DATA . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . 81
HYDRAULIC SYSTEM
HYDROSTATIC SYSTEM
DRIVE SYSTEM
MAIN FRAME
ELECTRICAL SYSTEM
ENGINE SERVICE
TECHNICAL DATA
ALPHABETICAL INDEX
730, 731, 732 Loader Service Manual
15
4
FOREWORD This manual is for the Bobcat loader
mechanic. It provides necessary servicing and
adjustment procedures for the Bobcat loader and
its component parts and systems. Refer to the
Operators Manual for operating instructions,
starting procedure, daily checks, etc. A general
inspection of the following items must be made
after the loader has had service or repair
1. Check that the ROPS/FOPS (Including
sidescreens) is in good condition and is not
modified.
9. Enclosure door latches must open and close
freely.
2. Check that ROPS mounting hardware is
tightened and is Melroe approved.
10. BobTach wedges and linkages must function
correctly and be in good condition.
3. The seat belt must be correctly installed,
functional and in good condition.
11. Safety treads must in good condition.
4. The seat bar and pedal
12. Check for correct function of indicator lamps
(Optional on some models).
interlocks must be correctly
adjusted, clean and lubricated.
5. Machine signs must be legible and in the
correct location.
13. Check hydraulic fluid level, engine oil
level and fuel supply.
6. Steering levers and foot pedals must return
to neutral.
14. Inspect for fuel, oil or hydraulic fluid
leaks.
7. Check for correct function of the work lights
and travel lights.
15. Lubricate the loader.
8. The parking brake must function correctly.
16. Check the condition of the battery and
cables.
730, 731, 732 Loader Service Manual
13
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17. Inspect the air cleaner for damage or
leaks. Check the condition of the element.
18. Check the electrical charging system.
19. Check tires for wear and pressure.
20. Inspect for loose or broken parts or
connections.
21. Operate the loader and check all functions.
Recommend to the owner that all necessary
corrections be made before the machine is
returned to service.
730, 731, 732 Loader Service Manual
12
7
PREVENTIVE MAINTENANCE
PREVENTIVE MAINTENANCE
Paragraph Number
Page Number
BOBTACH AND PIVOT PINS . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
18 ENGINE SERVICE (GENERAL) . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. 13 HYDRAULIC FLUID AND FILTER . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. 14 INTRODUCTION . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . 11 LOADER LUBRICATION . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . 17 SERVICE INTERVALS .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . 12 TIRES . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . 16 TRANSMISSION DRIVE SYSTEM . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . 15
113 14 111 11 113 13 112 112
730, 731, 732 Loader Service Manual
11
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1 PREVENTIVE MAINTENANCE 11 INTRODUCTION 11.1
Symbols
Loader Serial Number
This notice identifies important procedures
which must be followed to prevent damage to the
loader.
IMPORTANT
B02674R
Fig. 11 Loader Serial Number
This safety alert symbol indicates important
safety messages in this manual. Be alert to the
possibility of personal injury and carefully read
the message that follows this symbol.
WARNING
11.2 Serial Number Identification It is
important to make correct reference to the serial
number of the loader when making repairs or
ordering parts. It is possible that the present
machines do not use all the same parts as earlier
machines or it is possible that different
procedures are used for service or repair.
B02120
Fig. 12 Engine Serial Number (730) 11.3 Loader
Serial Number The loader serial number plate
location is on the inside of the left upright,
above the grill (Fig. 11). Explanation of
serial number XXXX M XXXXX
Production Sequence (Series) Plant
Location Model, Engine Version
B02249
Fig. 13 Engine Serial Number (731)
11.4 Engine Serial Number 730 Wisconsin (Fig.
12) The engine serial number location is on the
engine shroud on the left side of engine. Use all
numbers when ordering parts for this
engine. 731 Deutz (Fig. 13) The engine serial
number location is on the right side of cylinder
block. Use all numbers when ordering parts for
this engine.
732 Ford (Fig. 14) The engine serial number
location is on the right side of the valve cover.
Use all numbers when ordering parts for this
engine.
B02796
Fig. 14 Engine Serial Number (732)
730, 731, 732 Loader Service Manual
11
9
11.5 PreDelivery Inspection The purpose of the
predelivery inspection is to make sure that the
loader is in correct operation condition when
it comes to the dealer and before delivery to the
customer. The predelivery inspection also lets
the factory know when something is wrong with the
loader so that the problem can be corrected
and prevented in the future. All items on the
inspection form (Fig. 15) must be completed
according to specifications in this manual. Fig.
15 PreDelivery Inspection One copy of the
completed form is to be mailed to
CLARK EQUIPMENT COMPANY MELROE DIVISIONSERVICE
DEPT. GWINNER, NORTH DAKOTA 58040

• The other copy is for the dealer.
• 11.6 30 Hour Inspection
• The 30hour inspection must be completed soon
  after the first 30 hours of operation.
• Fig. 16 30Hour Inspection
• The purpose of the 30hour inspection is
• For adjustment and inspection after first work
  period.
• To correct wrong maintenance and operating
  methods.
• For demonstration of correct service procedures
  to customer.
• All items on the 30hour inspection form (Fig.
  16) must be completed by the dealers mechanic,
  according to specifications in this manual.
• When the 30 hour inspection has been completed,
  the form must be signed by (1) the mechanic that
  completed the inspection, (2) the dealer, and (3)
  the owner or operator.
• One copy of the completed form is to be mailed
  to
• CLARK EQUIPMENT COMPANY MELROE DIVISIONSERVICE
  DEPARTMENT
• GWINNER, NORTH DAKOTA 58040
• One copy is for the owner and one copy is for the
  dealer.

730, 731, 732 Loader Service Manual
12
10
12 SERVICE SCHEDULE Maintenance work must be
done at regular intervals. Failure to do so will
result in damage to the Bobcat loader or the
engine. The service schedule is a guide for
correct maintenance of the Bobcat loader. DO NOT
change this service schedule unless the frequency
of service is increased when the Bobcat loader is
operated in very hot, cold, dusty or corrosive
conditions.
DO NOT work on the loader with the lift arms
in a raised position without support. Use the
lift arm stops or other methods.
MODEL MODEL MODEL SERVICE SCHEDULE HOURS SERVICE SCHEDULE HOURS SERVICE SCHEDULE HOURS SERVICE SCHEDULE HOURS SERVICE SCHEDULE HOURS SERVICE SCHEDULE HOURS SERVICE SCHEDULE HOURS SERVICE SCHEDULE HOURS SERVICE SCHEDULE HOURS
730 731 732 ITEM SERVICE REQUIRED 810 SERVICE REQUIRED 810 50 100 250 300 500 1000
730 731 732 ITEM 50 100 250 300 500 1000
Engine Air Cleaner Clean dust cup. Check condition of system. Check condition indicator.
Engine Cooling System Check coolant level. Add coolant when level is low. Remove debris from the radiator grill area.
Tires Check air pressure check for damage.
Wheel Nuts Tighten nuts 115 ft.lbs. (155 Nm) torque.
Engine Oil Check and add oil as needed.
All Pivot Points Add lubricant to all fittings.
Engine Cooling Inlet Check rear door grill blower inlets for restriction of air flow. Clean cooling fins blower housing when necessary.
Indicators, etc. Check for correct operation of all.
Operator Cab Check condition of cab bolts
Seat Belt Check condition of strap, buckle replace if damaged.
Hydraulic Fluid Check add recommended fluid as needed.
Safety Signs (Decals) Check for damaged decals or decals that are gone. Replace as needed.
Engine Oil Filter Change the oil the filter.
Control Pedals Steering Add grease to fittings until extra grease shows.
Battery Check water level cables.
Hydraulic Tubes Hoses Check for damage or leaks. Replace as needed.
VBelts Check tension make adjustments.
Crankcase Breather Clean breather cap every oil change.
BobTach Check locking levers wedges for condition operation.
Parking Brake Check operation adjust as needed.
Chaincase Fluid Check fluid level add as needed.
Hydraulic Filter Make replacement of filter element.
Engine Cylinder Head Bolts Tighten to correct torque after first 100 hours adjust the valves as needed.
Engine Air Cleaner Check system for leaks. Replace element when condition indicator shows red.
Crankcase Breather Remove breather clean.
Governor Check oil level in the reservoir.
Main Frame Upright Check the torque of the bolts that hold the transmission assembly to the upright.
Steering Lever Pivots Grease pivot points.
Spark Arrestor Muffler Remove the plug clean the spark chamber.
Engine Fuel Filter Replace the filter element.
Starting Motor Remove, clean service as needed.
Engine Fuel Filter (Inline) Replace the element.
Main Fuel Filter Make replacement of the element. Vent air from the fuel system after changing element.
40 Micron Filter Replace the filter in the port block.
Universal Joint Grease ujoint
Engine Compression The minimum compression reading must be at least 75 of maximum compression reading.
Chaincase Make replacement of fluid.
Hydraulic System Make replacement of fluid filter. Replace cap.
730, 731, 732 Loader Service Manual
Revised Aug. 83
13
11
13 ENGINE SERVICE (General) 13.1 Engine Oil
and Filter (Fig. 17 thru Fig. 110)
Oil Fill Cap
Oil Specification 730 and 732 Use a good
quality oil which has API Service Classification
SE. 731 Use a good quality oil which has API
Service Classification CC or CD. Use oil of
correct SAE viscosity for temperature conditions
at the time of starting not for the highest
temperature expected during the working day.
Engine Oil Filter Drain Plug Fig. 17 Engine
Servicing (730)
C02256
Oil Fill Cap
Dipstick
Oil Filter
B03963 B03965
Fig. 18 Engine Servicing (731)
730, 731, 732 Loader Service Manual
14
Revised Nov. 83
12
RECOMMENDED SAE VISCOSITY NUMBER (LUBRICATION
OILS FOR ENGINE CRANKCASE)
Dipstick
C?34 29 23 18 13 7 1 4 10 15 21 27
32 38 43 49 54 60
SAE 10W3040
SAE 15W40
Oil Fill
SAE 5W30
Minimum
SAE 30W
SAE 20W20 SAE 10W
Maximum
B02663R
B02335
??30 20 10 0 10 20 30 40 50 60 70 80
90 100 110 120 130 140
Fig. 19 Checking Crankcase Oil (732)
TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL
CHANGE (GASOLINE USE API CLASSIFICATION
SE) (DIESEL USE API CLASSIFICATION CD)
Oil Filter Oil Filter Oil Filter
Crankcase Drain Crankcase Drain

B02658
Checking Oil Engine must be stopped to check oil
level. Check oil level every 4 hours for the
first 50 hours of operation. After the first 50
hours of operation, check oil level every day
(810 hours). Oil level must be kept between the
MIN and MAX marks on the dipstick. Adding
Oil Remove oil fill cap and add enough oil of
the correct specification and viscosity to make
oil level near the MAX on the
dipstick. Replacement Oil and Filter 1. Stop the
engine.
Fig. 110 Engine Oil Filter Location (732)

1. Remove the drain plug when engine is hot.
2. Let oil flow for several minutes.
3. Remove filter.
4. Install drain plug.
5. Clean area around filter base.
6. Put clean oil on gasket of new filter and install
   new filter. Tighten filter by hand only.
7. Fill with 4 quarts (3,79 l) of oil of the correct
   specification and viscosity.

730, 731, 732 Loader Service Manual
15
13
13.2 Crankcase Breather 730 Wisconsin The
crankcase breather is a closed system. The
breather system must be cleaned every 500
hours. 732 Ford (Fig. 112) The crankcase
breather is also the oil fill cap. Clean the
breather cap with solvent every time you replace
engine oil. 731 Deutz (Fig. 111) The
crankcase breather is located on the right side
of cylinder block. Clean the breather assembly
every 500 hours. 13.3 Air Cleaner System The air
cleaner system must be kept clean and free from
defects for good engine performance and long
service life. Service air cleaner as follows 1.
Remove and clean dust cup every day (Fig. 113).
Breather Cap
A01601
Fig. 111 Crankcase Breather (731)
B02677
Fig. 112 Crankcase Breather (732)
2. Do not remove element unless replacement is
necessary. (When condition indicator shows red.)
Gasket
Element
NOTE Be sure (1) gasket
Rubber Baffle
surfaces are clean before
installing new element and (2) be sure gasket
is in correct place. 3. Inspect complete air
cleaner system and make replacement of any parts
with defects. Be sure hose connections are
tight.
4. Check running operation of air cleaner system
as follows a. Start engine and run at idle.
Dust Cup
C01024R
Fig. 113 Air Cleaner Assembly
b. Close air inlet on air cleaner. The engine
speed must become slower then stop. c. If the
engine does not stop, the system has a leak.
Inspect, and make repairs as necessary. 13.4
Fuel System (730, 732) Use only regular
gasoline with an octane rating of 9094. DO NOT
USE UNLEADED GASOLINE. 1. Engine must be stopped,
ignition off and engine cool before putting fuel
in tank.
Fuel Cap

1. Remove fuel cap (Fig. 114) and fill tank with
   clean fuel using an approved safety container.
2. Put fuel in the tank ONLY when the machine is in
   a large open area (outside or a large building).

DO NOT put fuel in tank while near open flames or
sparks. DO NOT SMOKE while putting fuel in tank.
WARNING
B02654R
Fig. 114 Fuel Filling Location
730, 731, 732 Loader Service Manual
16
14
4. Use only clean fuel.
5. Install fuel cap after filling. Be sure cap is
tight. Fuel Filter (Inline) A fuel filter is
located on the right side of the machine near the
fuel tank outlet (Fig. 110). The fuel filter
must be checked every 300 hours. To check or make
replacement of fuel filter 1. Turn fuel valve
off (Fig. 115).
Filter Element
2. Loosen hose clamp and remove hose from inlet
end of fuel filter.
Valve
3. Connect a short piece of hose to the outlet
end of fuel filter and turn fuel valve on.
B02191R
4. If fuel goes through the filter, it does not
need replacement. If fuel does not go through
filter, make replacement.
Fig. 115 Fuel Filter and Valve (730, 731)

• When installing new fuel filter, loosen both hose
  clamps to remove filter.
• Install fuel filter with arrow toward carburetor
  (Fig. 115) and be sure fittings are tight.
• 13.4a Fuel System (731)
• See Section 7 for 731 fuel system maintenance.
• Fuel Pump

730 The fuel pump is located on top of the
cylinder block and under the intake manifold.
Repair parts are not available for the fuel pump.
If the fuel pump does not operate correctly,
replacement must be made. 732 The fuel pump is
located on the left side of the engine above the
starter. Repair parts are not available for the
fuel pump. If the fuel pump does not operate
correctly, replacement must be
made. Carburetor 730 The carburetor is located
in the center of the engine on top of the intake
manifold. 732 The carburetor is located on the
left side of the engine, above and behind the
fuel pump. Repair kits are available for the
carburetor. 730 Carburetor Adjustment (Fig.
116). Adjust the idle screw for the best low
speed operation. The engine must idle at 1125 to
1150 RPM. Repair kits are available for this
carburetor.
Throttle
Stop Screw
Idle Adjustment Needle
C02319
Fig. 116 Carburetor Adjustment (730)
730, 731, 732 Loader Service Manual
17
15
732 Carburetor Adjustment (Fig. 117) The
only adjustments to the carburetor are (1) idle
adjusting needle and (2) throttle idle
adjustment. Idle Adjusting Needle 1. Turn needle
all the way in. DO NOT use force, it will
cause damage to the needle.
2. Turn the needle out (counterclockwise)
about 11/2 turns, then start engine.
Idle Adjustment Needle
3. If engine does not run smoothly, turn needle
out until it does.
A02499
Fig. 117 Carburetor (732)

• Throttle Idle Adjustment
• Start the engine.
• Hold governor speed change lever against the stop.

Cap
3. Make adjustment to throttle idle screw until
engine runs 750850 RPM.
13.5 Engine Cooling System 730 and 731 These
engines are cooled with air. Be sure cooling fins
on cylinder heads are kept clean. 732 Check
coolant level at the coolant recovery tank (Fig.
118). The tank must be 1/3 full when cold. Also,
when engine is cold, check to see that radiator
is full.
B02672R
Fig. 118 Coolant Recovery Tank
Do not remove radiator cap when engine is
hot. W20111285
Removing Coolant From System (732) 1.
Disconnect wire from temperature switch.
1/2 (12,7 mm)
2. Remove the temperature switch located on the
right side of the engine block.
3. After all coolant has come out, install switch
and connect wire to switch.
B03965
Fig. 119 Belt Tension Adjustment (731)
730, 731, 732 Loader Service Manual
18
Revised Nov. 83
16
13.6 Engine Electrical System (730, 731 732)
1/2 Movement
The Bobcat has a 12 volt, negative ground,
alternator charging system. General service of
the electrical system is as follows
1. The factory battery is maintenance free.
Batteries that are not maintenance free must have
electrolyte checked every 50 hours.
1/4 Movement
2. Check battery cables to see that both are
clean and tight. Remove corrosion with soda and
water solution. Put grease on cable ends to
prevent further corrosion.
B02661
Fig. 120 Belt Tension Adjustment (732)
3. a. 730 The 730 Bobcat has a

• flywheel type alternator. Check wires for damage
  condition.
• 731, 732 Check alternator belt tension. Make
  adjustment for belt movement with 5 lbs. (2,27
  kg) force (Fig. 119 Fig. 120) as shown.
• 732 Check governor belt tension. Make adjustment
  for belt movement with 5 lbs. (2,27 kg) force
  (Fig. 120) as shown.
• 4. The 730, 731, 732 Bobcats have two fuses
  located in the instrument panel (Fig. 121).
• If any fuse is bad, it is caused by an overload
  in the electrical system. Check for a broken wire
  or broken insulation.
• Using extra battery as an aid in starting
• If it is necessary to use an extra battery as an
  aid in starting, it must be correctly connected
  to the Bobcat electrical system as follows

WARNING
Protect eyes, skin and clothing from ACID.

1. Fasten one end of cable to positive () connector
   of Bobcat battery.
2. Fasten the other end of the same cable to
   positive () connector of extra battery.
3. Use second cable and fasten one end of the
   negative () connector of extra battery.
4. Fasten the other end of second cable to engine
   block. Fasten to block as far away from battery
   as possible to prevent sparks near battery.

WARNING
DO NOT USE AUTOMATIC TRANSMISSION FLUID!
730, 731, 732 Loader Service Manual
19
17
Front Lights
Light Switch Transmission Warning Light
Key Switch
Fuses
Rear Light
Engine Warning Light
Voltmeter
Hour Meter
Fuel Gauge
Fuel Sender Switch
E01240
Fig. 121 ROPS Electrical System
730, 731, 732 Loader Service Manual
110
18

• Installing New Battery
• Remove battery cables.
• Mark cables for correct installation on new
  battery.
• Thoroughly clean new battery connectors and ends
  of cable.
• Put new battery in same position as old one was
  in. Fasten battery in place.

5. Be sure cable ends do not touch anything
except battery connectors.
Upper Check Valve
6. Tighten cables. NOTE Connect ground cable ()
last to avoid sparks.
13.7 Ignition System (730 732) The basic items
of the ignition system are coil, distributor and
spark plugs. Every 200 hours, check condition of
points and make replacement of spark plugs.
Making Adjustment of Spark Plug Gap 1. Remove
wires from spark plugs.
Lower Check Valve
B02673
Fig. 122 Checking Hydraulic Fluid

• Remove spark plugs.
• Remove carbon deposits from spark point.
• Set spark plug gap. See Section 8 for correct
  gap.
• Install spark plugs and wires.
• Making Adjustment of Point Gap
• Turn engine until rubbing block is on high point
  of cam.
• Put correct thickness feeler gauge (See Section
  8Technical Data) between contact points.
• Loosen adjustment screw. Move breaker arm contact
  until correct gap is given. Tighten screws
  again.
• 14 HYDRAULIC FLUID AND FILTER
• Fluid
• Check level of hydraulic fluid every 50 hours
  (Fig. 122).
• Lower the lift arms and tilt the BobTach
  backwards. Stop the engine.
• Turn lower check valve counterclockwise.
• If hydraulic fluid comes from valve, fluid level
  is satisfactory.
• If fluid does not come from valve, turn lower
  valve clockwise until tight. Turn upper valve
  counterclockwise and fill reservoir (See below
  for oil specifications. DO NOT OVERFILL.) until
  fluid comes from upper valve. Turn valve
  clockwise until tight.
• Use only SAE 10W30 or 10W40 oil which has an
  API classification of SE.

IMPORTANT
DO NOT USE AUTOMATIC TRANSMISSION FLUID!
730, 731, 732 Loader Service Manual
111
Revised Dec. 96
19

• Filter
• Make replacement of hydraulic filter every 100
  hours.
• Remove hydraulic filter (Fig. 123).
• Thoroughly clean surface where filter gasket will
  make contact.

Oil Filter
3. Put clean oil on gasket of new filter.

1. Install new filter and tighten hand tight.
2. Start the engine and inspect for leaks.

B02665
Fig. 123 Hydraulic Oil Filter
15 TRANSMISSION AND DRIVE SYSTEM Drive
Chains The drive chains need replacement only
when one becomes broken. (See 41.2 for
replacement of drive chains.)
Brakes Check brakes for correct operation every
50 hours. Make adjustment to brakes as follows
(Fig. 124) 1. Put brake pedal in open position.
1/4 Spacer Tool
2. Check pedal and linkage for freeplay.
3. There must be 1/4 (6,35) of freeplay between
the spacer and the nut at the rear end of linkage
(Fig. 127). See Section 4 for brake pad
replacement and complete installation of
brakes. Fluid Check transmission fluid level
every 100 hours. 1. Put Bobcat on a level surface.
C02366
Fig. 124 Brake Linkage Adjustment

• Remove check plug (Fig. 125) located at the
  front of the transmission housing.
• If fluid does not come out of check hole, add
  fluid through hole until it comes out.
• NOTE See Page 111 for correct transmission
  fluid.
• Install check plug.
• Make replacement of transmission fluid every 1000
  hours.

16 TIRES Check tires regularly for wear, damage
and correct pressure. (Correct pressure to 4550
psi (310340 kPa).
Plug
C02037
Fig. 125 Chaincase Check Fill Plug
730, 731, 732 Loader Service Manual
112
20
Tire Rotation Tire rotation is necessary to be
sure of even wear. Make tire rotation from front
to rear, rear to front as shown in figure 126.
CHAIN CASE
HYDRAULIC RESERVOIR
When new tires are installed, install two new
tires at the same time and put both on the same
side of Bobcat.
DO NOT put fluid (ballast) in the tires on
this loader.
GREASE
COOLANT
TRANSMISSION OIL FILTER
GREASE
C01965R
Fig. 126 Tire Rotation
Check wheel bolts regularly and make sure all are
tight. (See Section 8 for torque specifications.)
6557316
Fig. 127 Lubrication Points 17 LOADER
LUBRICATION Regular lubrication of the loader is
important for good performance. Make lubrication
at intervals according to 12 SERVICE INTERVALS
on Page 13. Figure 127 shows the location of
grease fittings on the 730 series Bobcat. Use a
good quality lithium based, multipurpose
grease. Also put lubricant on the seat rails
(Fig. 128).
18 BOBTACH AND PIVOT PINS The BobTach must be
checked regularly for condition and wear (See 12
SERVICE INTERVALS on page 13). When levers
are in locked position (Fig. 129), the wedges
must go through the holes in the frame of the
attachment. Make replacement of bent or broken
wedges. All pivot points (Lift arm, BobTach and
cylinders) use pins which are held in place by
lockbolts (Fig. 130). Check lockbolt nuts to be
sure all are tight.
B02135R
Fig. 128 Seat Rail Lubrication
D01380
A02659
Fig. 129 BobTach
Fig. 130 Pivot Pin Lockbolts
730, 731, 732 Loader Service Manual
113
21
19 THE ENGINE MUFFLER The muffler on the engine
of the 730 loader (S/N 12002 Below) can come
loose, because there is a failure of the studs at
the manifold. Replace the studs and nuts which
fasten the muffler to the manifold (Fig. 131,
Items 1 2). Tighten the nuts to 1418 ft.lbs.
(1924 Nm) torque. (See the Parts Book or
Microfiche for the correct part number).
2 1
E01179 Fig. 131 Engine Muffler Installation
730, 731, 732 Loader Service Manual
114
Added June 79
22
HYDRAULIC SYSTEM
Paragraph Page Number Number CONTROL PEDAL . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . 210 233 HYDRAULIC CONTROL VALVE
. . . . . . . . . . . . . . . . . . . . . . . .
23 23 HYDRAULIC/HYDROSTATIC RESERVOIR . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . 27 231 HYDRAULIC PUMP . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . 24 215 HYDRAULIC SYSTEM
INFORMATION . . . . . . . . . . . . . . . . . .
22 22 LIFT CYLINDERS . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
25 219 OIL COOLER . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . 28 232 10 MICRON FILTER . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
29 233 TILT CYLINDER . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
26 225 TROUBLESHOOTING . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 21 21
HYDRAULIC SYSTEM
Instructions are necessary before doing
maintenance and specified service on this loader.
See all instructions and warnings in the manual.
Check warnings at the beginning of the
preventive maintenance section. After doing
service always check for correct function of
loader. Safety glasses or goggles are always
needed for eye protection from electric arcs from
shorts or welding, battery acid, compressed
springs, fluids under pressure, and flying
debris or loose material when engines are
running or tools are used. Use eye protection
approved for type of welding. Failure to obey
warnings
WARNING
can cause injury or death.
W1006
Diesel fuel or hydraulic fluid under
pressure can penetrate the skin or eyes. Fluid
leaks under pressure may not be visible. Use a
piece of cardboard or wood to find leaks but do
not use bare hand. Wear safety goggles. If fluid
enters skin or eyes, get immediate medical
attention. W1035
WARNING
730, 731, 732 Loader Service Manual
21
Revised Nov. 83
23
SYSTEM OPERATIONS
730. 731, 732 HYDRAULIC/HYDROSTATIC
SYSTEM (Closed Center System) (Chart PI 247 1.
247 2 or 2473)
The oil flows by gravity from the
reservoir block O which is on top of the
hydraulic pump
to the port
e
. Return oil from
the cold weather bypass valve and the oil cooler
join with
reservoir oil to supply oil to the hydraulic
pump . "Case drain" oil
from the hydrostatic pumps flows through the
bearing of the
hydrostatic pump pump -
and also supplies oil to the hydraulic
The hydraulic pump is a "vane type" pump and is
driven by a
e
shaft through the hydFostatic puP . The
hydraulic pump to the hydraulic control valve
goes from the
e
The hydraulic
control valvee has an shim adjustable relief
through the control valve eand back to the port
block O . If one
. When all three spools are in neutral position,
the oil goes
valve
of the spools is activated, the oil goes out the
respective port and to either the base end, or
the rod end of the hydraulic cylinder(s). As the
e
oil goes into one end of the cylinder(s), return
oil comes from the
opposite end of the cylinder(s) and back into the
control valve
When the cylinder(s) reaches the end of the
stroke, the oil flow stops
e
and causes hydraulic pressure tO increase. When
the pressure reaches
the setting of the relief valve
, it will open and let the oil bypass
the hydraulic circuit (internally) and go back to
the port block O . If
you let the spool go back to the neutral
position, then there is oil
e
available for the other sections. Two sections of
the
COOtFOl
can be used at the same time if the main relief
valve e s
valve
not open.
The oil which goes back to the port block O goes
through a 40 micron filter . The normal flow of
the oil is through the 40 micron
-1-
6 566 16S I2-B 1!-26C
Printed in U.S.A.
24
e
filter and to the hydrostatic pumps e . But if
the oil is cold or
there is a sudden increase of pressure from the
control valve
the
pressure will cause the cold weather bypass valve
to open and put the excess oil back to the
reservoir until the excess pressure decreases.
From the 4O micron filter
the oil flows pass the temperature
switch block O
and the pressure switch . The oil flows from the
port . This oil
to the center section of the hydrostatic pumpse
is called "charge supply oil". In thecenter
section of the hydrostatic
pumps valves
the oil is against two high pressure replenishing
relief , two replenishing valves and the
non-functional charge
e
relief valve . The charge relief valve
has a heavy spring holding it shut and it is
non-functional. When the oil gets to the
hydrostatic pumpse t activates the high
pressure replenishing valves The replenishing
valves open and let oil into
the hydrostatic pumps for replenishing,
lubrication and cooling.
The hydrostatic pumps e do not need the full
volume of oil flow, so
This extra oil goes to the neutral charge
bypass I See Chart for S/N break). When pressure
reaches
there is extra valve
the setting of the neutral charge bypass
valve ISee Chart for
e
S/N break) opens and lets this extra oil go to
the oil cooler
There are two hydrostatic pumps e and two
hydrostatic motors . One pump and one motor
work together as a pair to drive on one side of
the machine. The other pump and motor work as a
pair to drive the opposite side of the machine.
replenishing valves e open and oil goes into
the
When the
hydrostatic pumps the flow of oil becomes the
"drive loop oil". When the steering levers are in
neutral, the hydrostatic
pumpsa
and the hydrostatic motors are not working but do
have charge pressure. When the steering
levers are moved, the swashplates in the
hydrostatic pumpse are angled and oil is forced
out of the pressure side of the hydrostatic
pumpse
and to the
hydrostatic motors . This flow of oil is called
"drive pressure".
e
Drive pressure is much higher than charge
pressure causing the
replenishing valves hydrostatic motors
the two
e
to close allowing the flow of oil to O IO
. There are four replenishing valves
25
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for each hydrostatic pumps e . One is for
forward travel and one for reverse travel. When
the machine is driven. with the bucket down, into
a pile of dirt, there is resistance causing high
pressure oil in the
e
drive loop. There is a relief valve built into
two of the high pressure
(for forward travel). This relief valve releases
the high
relief valves
pressure oil in the drive loop. When the relief
valve opens, the extra oil
,the
goes from the drive loop to the charge loop to be
used again. If the oil
e
pressure gets above the relief valve setting in
the drive loop
pressure can break tubelines, damage the
hydrostatic pumps
OF
the hydrostatic motors . The two replenishing
valves for reverse travel do not have the relief
function.
The hydrostatic motors are a geroller type and
have a built-in
e
shuttle valve that meters oil through to the
check valve e. and to the
OiÎ cooler filter e pump
. The oil flows from the oil cooler
to the hydraulic
and to the inlet of the port block O on top of
the hydraulic
e
. The shuttle valve in the hydrostatic motors
opens to
let oil flow through the oil cooler get to hot.
so that the drive loop oil does not
The hydraulic filtere ha. a bypass valvee See
Chart for S/N break) to allow oil flow when the
oil will not go through the filter element
(plugged). The cold weather bypass valve will
open when the lift arms are lowered quickly
with a heavy load in the bucket. This happens
because a large amount of oil is pushed out of
the lift cylinders through
e
the control valve bypass valve
and into the port block . The cold weather
O
will also open when the oil is cold and is too
thick for
all the oil to go through the 4O micron filter
.
27
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