BOBCAT 730 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
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
WARNING
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. CORRECT CORRECT CORRECT
B-10731a
B-12365
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.
WRONG
WRONG
WRONG
B-15231
B-11799
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.
WRONG
WRONG
WRONG
B-6590
B-6580
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.
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.
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.
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
3
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
16. Check the condition of the battery and
cables.
function correctly.
730, 731, 732 Loader Service Manual
13
5
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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
8
1 PREVENTIVE MAINTENANCE 11 INTRODUCTION 11.1
Symbols
Loader Serial Number
IMPORTANT
This notice identifies important procedures
which must be followed to prevent damage to the
loader.
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

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 Oil Fill Dipstick Oil Fill Dipstick Oil Fill Dipstick Oil Fill
Minimum Maximum Minimum Maximum
B02335 B02663R
C?34 29 23 18 13 7 1 4 10 15
21 27 32 38 43 49 54 60
SAE 10W3040
SAE 15W40 SAE 5W30 SAE 30W SAE
20W20 SAE 10W ??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
• 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.

• 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. b. 731, 732 Check alternator belt
tension. Make adjustment for belt movement with
5 lbs. (2,27 kg) force (Fig. 119 Fig. 120) as
shown. c. 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.
• Be sure cable ends do not touch anything except
  battery connectors.
• Tighten cables.
• NOTE Connect ground cable () last to avoid
  sparks.

Upper Check Valve Upper Check Valve Upper Check Valve
Lower Check Valve
Lower Check Valve B02673
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.
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.
4. Install new filter and tighten hand tight.
5. 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
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