Title: Caterpillar Cat 140G Motor Grader (Prefix 5MD) Service Repair Manual Instant Download
1Service Repair Manual
Models 140G Motor Grader
2Shutdown SIS
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Product MOTOR GRADER Model 140G MOTOR GRADER
5MD Configuration 140G Motor Grader 5MD00001-UP
(MACHINE) POWERED BY 3306 Engine
Disassembly and Assembly 12G, 120G, 130G 140G
MOTOR GRADERS POWER TRAIN Media Number
-SENR3649-00 Publication Date -01/10/1987
Date Updated -27/09/2012
SENR36490004
Brake And Wheel Spindle Housings SMCS - 4205-015
4205-016 4205-011 4205-012 4251 Remove Brake
And Wheel Spindle Housings
Start By a. remove drive chains
31. Release the air pressure in the air tank by
loosening the bleed valves.
Do not disconnect the air line to the brake and
wheel spindle housing until the air pressure is
zero.
- Remove two nuts (2), the washers and guard (1)
from the housing. - Disconnect the air line from the housing and the
block on the tandem housing. Remove the air
line. - Fasten a hoist and tooling (A) to the plate on
the brake and wheel spindle housing and to the
stud on the wheel spindle. - Remove nuts (3) and the washers that hold the
brake and wheel spindle housing to the tandem
housing. Remove brake and wheel spindle housing
(4). Weight is 159 kg (350 lb.).
Install Brake And Wheel Spindle Housings
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5- Fasten a hoist and tooling (A) to brake and wheel
spindle housing. Put brake and wheel spindle
housing (1) in position on the studs in tandem
housing (2). - Install the nuts (3) and the washers that hold
the brake and wheel spindle housing to the tandem
housing. - Remove the hoist and tooling (A). Install the air
line on the brake and wheel spindle housing and
the block on the tandem housing. Install the
guard on the housing. Install the two nuts and
the washers that hold it. - End By
- a. install drive chains
Disassemble Brake And Wheel Spindle Housings
Start By a. remove brake and wheel spindle
housings
6- Remove wire (3) from the bolts. Remove bolts (1).
Remove retainer (2) and the shims that are under
the retainer. - Remove sprocket (4). Weight is 16 kg (36 lb.).
- Remove bearing cone (5) from the spindle and
cover (6). Remove O-ring seal (7) from cover
(6). - Remove the bolts and plate (8) that hold cover
(6) to the housing. Install two 5/8" - 11 NC
forged eyebolts in the cover. Fasten a hoist to
the eyebolts and remove the cover. Weight is 23
kg (50 lb.). Remove bearing cup (10) from the
cover. - Remove O-ring seal (9) from the cover.
6. Remove hub (11) from the wheel spindle.
77. Remove ten discs (12) and nine disc assemblies
from the housing.
- Put springs (15) in compression with tool (A).
- Remove rings (14) from the studs with pliers.
- Remove tool (A). Remove washers (13) and springs
(15) from the studs.
- Install two 5/8" - 11 NC forged eyebolts (16) in
housing (17). Fasten a hoist to the eyebolts. - Remove housing (17) from the wheel spindle.
Weight is 45 Kg (100 lb.). - Remove Duo-Cone seals (18) from the wheel spindle
and the housing.
- Install tooling (B) and blocks on the housing as
shown. - Remove piston (19) with tooling (B).
- Remove the O-ring seals from the piston. Remove
the bearing cup from the housing.
8- Remove bearing cone (21) from wheel spindle (20)
with tooling (C). - Do Steps 1 through 17 for the other brake and
wheel spindle housings.
Assemble Brake And Wheel Spindle Housings
- Lower the temperature of bearing cup (22) and
install it in housing (3). - Make sure the Duo-Cone seals for the wheel
spindle housing (17) and the wheel spindle are
clean and dry. Make sure all metal surfaces that
the seals make contact with are clean and dry.
Install Duo-Cone seal (18) in wheel spindle
housing (17) with tool (A).
- Install Duo-Cone seal (18) on wheel spindle (20)
with tool (A). Put a small amount of oil on the
metal surfaces of the seals that make contact
with each other. - Heat bearing cone (21) in oil to a maximum
temperature of 135C (275F). Install bearing
cone - (21) on the shaft of wheel spindle (20).
9- Install two 5/8" - 11 NC forged eyebolts in
housing (23). Fasten a hoist to the eyebolts. - Put housing (23) in position on wheel spindle
(20). Be careful not to damage the Duo-Cone
seals. Remove the hoist and the eyebolts. - Install small O-ring seal (24) on the piston.
Install the large O-ring seal (25) on piston
(19). Install piston (19) in housing (23).
- Put springs (15) in position on the studs.
- Put washers (13) in position on the springs.
- Put springs (15) in compression with tooling (B).
- Install rings (14) on the studs with pliers.
- Slowly release the pressure on the springs.
- Remove tooling (B).
10- Install hub (11) on the wheel spindle.
- Put clean SAE 30 oil on the discs and on the
discs assemblies. - Put discs (12) and disc assemblies (26) in
position in the wheel spindle housing starting
with a disc. There are ten discs and nine disc
assemblies. Make sure there is a disc assembly
between each disc.
- Install the O-ring seal in cover (6).
- Install O-ring seal (7) on cover (6). Put clean
grease on the two O-ring seals. - Lower the temperature of bearing cup (27) and
install it in cover (6). - Install two 5/8" - 11 NC forged eyebolts in cover
(6). Fasten a hoist to the eyebolts. - Put cover (6) in position on wheel spindle
housing (17). Remove the hoist and the eyebolts. - Install the bolts and the plate that hold cover
(6) to the housing. - Install bearing cone (5) on the wheel spindle and
in cover (6).
11- Put sprocket (4) in position on the splines of
the wheel spindle. - NOTE The sprocket for the front brake and wheel
spindle housing must be installed with the teeth
next to the cover. The sprocket for the rear
brake and wheel spindle housing must be
installed with the teeth away from the cover. - Put retainer (2) in position on the wheel spindle
without shims. Install bolts. Tighten the bolts
to a torque of 47 Nm (35 lb.ft.) while turning
the housing. Remove the bolts and the retainer.
Measure the distance between the end of the
sprocket and the wheel spindle. Install the
retainer and shims (21) that are the same
thickness as the distance measured minus .025 to
0.38 mm (.010 to .015 in.). Install bolts (23).
Install the wire on the bolts. - End By
- a. install brake and wheel spindle housings
Copyright 1993 - 2020 Caterpillar Inc. All
Rights Reserved. Private Network For SIS
Licensees.
Fri Feb 28 002444 UTC0800 2020
12Shutdown SIS
Previous Screen
Product MOTOR GRADER Model 140G MOTOR GRADER
5MD Configuration 140G Motor Grader 5MD00001-UP
(MACHINE) POWERED BY 3306 Engine
Disassembly and Assembly 12G, 120G, 130G 140G
MOTOR GRADERS POWER TRAIN Media Number
-SENR3649-00 Publication Date -01/10/1987
Date Updated -27/09/2012
SENR36490005
Tandem Housings SMCS - 4064-011 4064-012 Remove
Tandem Housings
Start By a. remove drive chains
- Fasten a hoist to tandem housing (2) as shown.
Install tooling (A) on the brake and wheel
spindle housings and the hoist. - Release the air pressure from the air tank by
loosening the bleed valves.
Do not disconnect the air line from the tandem
housing until the air pressure is zero.
133. Disconnect air line (1) from the junction
block on the frame.
- Remove nuts (4) and the washers that hold tandem
housing (2) to final drive housing (3). - Remove tandem housing (2). Weight is 594 kg (1310
lb.). - Do Steps 1 through 5 for the other tandem housing.
Install Tandem Housings
- Fasten a hoist and tooling (A) to the tandem
housing. - Put tandem housing (1) in position on final drive
housing (3). - Install nuts (2) and the washers that hold the
tandem housing to the final drive housing.
Tighten the nuts to a torque of 250 13 Nm
(185 10 lb.ft.).
14- Remove the hoist and tooling (A) from the tandem
housing. - Connect the air line to its correct location.
- Do Steps 1 through 5 for the other tandem
housing. End By - a. install drive chains
Copyright 1993 - 2020 Caterpillar Inc. All
Rights Reserved. Private Network For SIS
Licensees.
Fri Feb 28 002540 UTC0800 2020
15Shutdown SIS
Previous Screen
Product MOTOR GRADER Model 140G MOTOR GRADER
5MD Configuration 140G Motor Grader 5MD00001-UP
(MACHINE) POWERED BY 3306 Engine
Disassembly and Assembly 12G, 120G, 130G 140G
MOTOR GRADERS POWER TRAIN Media Number
-SENR3649-00 Publication Date -01/10/1987
Date Updated -27/09/2012
SENR36490006
Drive Sprockets SMCS - 4072-011 4072-012 Remove
Drive Sprockets
Start By a. remove tandem housings
1. Remove nut (1) with tool (A).
16- Remove sprockets (2) and (3). Weight of one
sprocket is 15 kg (32 lb.). - Do Steps 1 through 2 for the other drive
sprockets.
Install Drive Sprockets
1. Put sprocket (1) in position on the shaft.
Install sprocket (1) with the hub of the sprocket
away from the final drives.
- Put sprocket (2) in position on the shaft.
Install sprocket (2) with the hub toward the hub
on sprocket (1). - Put the nut that holds the sprockets on the shaft
in position on the shaft. Install the axle in the
differential and final drive. - NOTICE
- The following procedure must be used to put the
correct amount of preload on the bearings for
the final drives
- Tighten the nut to a torque of 135 Nm (100
lb.ft.) with tool (A). - Turn the sprockets to put the bearings in their
seats. - Hit the hub of the sprocket with a large punch
and a hammer.
17- Do Steps a, b and c until the nut does not turn
when it is tightened. - Loosen the nut.
- Tighten the nut to a torque of 70 Nm (50
lb.ft.). - If the nut is in a locking position, install the
cover and the bolts that hold it. - If the nut is not in a locking position, tighten
the nut to the next nearest locking position.
Install the cover and the bolts. - Do Steps 1 through 3 for the other drive
sprockets. End By - a. install tandem housings
Copyright 1993 - 2020 Caterpillar Inc. All
Rights Reserved. Private Network For SIS
Licensees.
Fri Feb 28 002636 UTC0800 2020
18Shutdown SIS
Previous Screen
Product MOTOR GRADER Model 140G MOTOR GRADER
5MD Configuration 140G Motor Grader 5MD00001-UP
(MACHINE) POWERED BY 3306 Engine
Disassembly and Assembly 12G, 120G, 130G 140G
MOTOR GRADERS POWER TRAIN Media Number
-SENR3649-00 Publication Date -01/10/1987
Date Updated -27/09/2012
SENR36490007
Final Drives SMCS - 4050-015 Disassemble Final
Drives
19Start By a. remove axles
1. Remove the nut that holds the sprockets on the
shaft with tooling (A). Install tooling (B) on
the shaft.
20- Lift the machine off the ground. Install tooling
(D) under the rear frame as shown. Remove the
bolts that hold covers (1) from the tandem
housing. Remove covers (1). - Install tooling (C) on the rear wheels. Fasten a
hoist to the tandem housing and tooling (C).
Install tooling (E) between tooling (C) and the
hoist to help keep the tandem housing in balance.
Disconnect the air line from the tandem housing. - Remove nuts (2) and the washers that hold the
tandem housing to the final drive housing. - Move the tandem housing away from the final drive
housing and on to tooling (B). - NOTE Tooling (B) keeps the sprockets in their
correct positions in the tandem housing.
- Remove tooling (B) from the shaft. Do not remove
tooling (B) from the sprockets. - Move the tandem housing away from the machine.
Weight is 1043 kg (2300 lb.).
- Remove O-ring seal (3) from the housing. Remove
bearing (4) from the shaft. - Remove bolts (5) that hold retainer (6) to the
housing. Remove retainer (6). - Remove the washer that is between the final drive
housing and retainer (6). The washer is in three
sections.
21- Install two 5/8" - 11 NC forged eyebolts (11) and
nuts in the housing as shown. Put a fork lift
truck in position under the housing. Install
tooling (F) on the lift truck and the eyebolts. - Pull the outer housing (8) from the inner housing
with tooling (F). - Remove two oscillation bearing rings (9) from the
housings. Remove washer (7) from the inner
housing. Washer (7) is in three sections.
- Put tooling (G) and a floor jack in position
under inner housing (13). A rag can be put
between tooling (G) and the housing to prevent
damage to the housing. - Remove nuts (10) and the washers that hold inner
housing (13) to the bevel gear case. - Install two 3/4" - 10 NC forcing screws (14) in
the housing. Remove the inner housing far enough
to install tooling (H) on the housing. Fasten a
hoist to tooling (H). Put an axle in position in
the final drive housing to help keep the housing
in balance. - Install a wire around the forcing screws and the
planet carrier to keep the planet carrier from
falling. Remove inner housing (13) and the planet
carrier. Weight is 163 kg (360 lb.). Remove O-
ring seal (12). Remove the O-ring seal from the
inside surface of inner housing (13). - Put the final drive housing in position on blocks
with the planet carrier up. Remove the wire and
the forcing screws from the housing.
19. Remove pinion (16) from planet carrier (15).
Fasten a hoist to planet carrier (15) and remove
it. Weight is 41 kg (90 lb.).
22- Bend the locks away from the bolts that hold
shafts (17) to the planet carrier. Remove the
locks and the bolts. Remove retainers (18) from
the shafts. - Remove shafts (17) from the planet carrier.
Remove gears (21) and washers (20) from the
planet carrier. Remove rollers (19) from gears
(21).
22. Remove ring (23) from the planet carrier with
tooling (I). Remove washer (22) from the planet
carrier.
23. Bend the locks away from bolts (25). Remove
bolts (25). Remove plates (26) that hold
ring (24) to the housing. 24. Remove ring gear
(24). Weight is 17 kg (38 lb.).
25. Remove shaft (27) from the housing. Weight is
18 kg (40 lb.).
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2426. Remove bearing (28) from shaft (27) with
tooling (J).
- Remove bearing cup (29) from the housing with
tooling (K). Remove the lip-type seal from the
housing. Remove the bearing cup from the other
end of the housing with a hammer and a punch. - Do Steps 1 through 27 for the other final drive.
Assemble Final Drives
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