Caterpillar cat 140 g motor grader (prefix 5md) service repair manual (5md00001 and up)

Service Repair Manual
Models
140G Motor Grader

Shutdown 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
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
1/9
140G Motor Grader 5MD00001-UP (MACHINE) POWERED BY 3306 Engine(SEBP...
2020/2/28
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...

1. 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.
2. Remove two nuts (2), the washers and guard (1) from the housing.
3. Disconnect the air line from the housing and the block on the tandem housing. Remove the air
line.
4. Fasten a hoist and tooling (A) to the plate on the brake and wheel spindle housing and to the
stud on the wheel spindle.
5. 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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1. 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).
2. Install the nuts (3) and the washers that hold the brake and wheel spindle housing to the tandem
housing.
3. 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
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1. Remove wire (3) from the bolts. Remove bolts (1). Remove retainer (2) and the shims that are
under the retainer.
2. Remove sprocket (4). Weight is 16 kg (36 lb.).
3. Remove bearing cone (5) from the spindle and cover (6). Remove O-ring seal (7) from cover
(6).
4. 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.
5. Remove O-ring seal (9) from the cover.
6. Remove hub (11) from the wheel spindle.
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7. Remove ten discs (12) and nine disc assemblies from the housing.
8. Put springs (15) in compression with tool (A).
9. Remove rings (14) from the studs with pliers.
10. Remove tool (A). Remove washers (13) and springs (15) from the studs.
11. Install two 5/8" - 11 NC forged eyebolts (16) in housing (17). Fasten a hoist to the eyebolts.
12. Remove housing (17) from the wheel spindle. Weight is 45 Kg (100 lb.).
13. Remove Duo-Cone seals (18) from the wheel spindle and the housing.
14. Install tooling (B) and blocks on the housing as shown.
15. Remove piston (19) with tooling (B).
16. Remove the O-ring seals from the piston. Remove the bearing cup from the housing.
5/9
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17. Remove bearing cone (21) from wheel spindle (20) with tooling (C).
18. Do Steps 1 through 17 for the other brake and wheel spindle housings.
Assemble Brake And Wheel Spindle Housings
1. Lower the temperature of bearing cup (22) and install it in housing (3).
2. 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).
3. 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.
4. Heat bearing cone (21) in oil to a maximum temperature of 135°C (275°F). Install bearing cone
(21) on the shaft of wheel spindle (20).
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5. Install two 5/8" - 11 NC forged eyebolts in housing (23). Fasten a hoist to the eyebolts.
6. Put housing (23) in position on wheel spindle (20). Be careful not to damage the Duo-Cone
seals. Remove the hoist and the eyebolts.
7. 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).
8. Put springs (15) in position on the studs.
9. Put washers (13) in position on the springs.
10. Put springs (15) in compression with tooling (B).
11. Install rings (14) on the studs with pliers.
12. Slowly release the pressure on the springs.
13. Remove tooling (B).
7/9
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14. Install hub (11) on the wheel spindle.
15. Put clean SAE 30 oil on the discs and on the discs assemblies.
16. 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.
17. Install the O-ring seal in cover (6).
18. Install O-ring seal (7) on cover (6). Put clean grease on the two O-ring seals.
19. Lower the temperature of bearing cup (27) and install it in cover (6).
20. Install two 5/8" - 11 NC forged eyebolts in cover (6). Fasten a hoist to the eyebolts.
21. Put cover (6) in position on wheel spindle housing (17). Remove the hoist and the eyebolts.
22. Install the bolts and the plate that hold cover (6) to the housing.
23. Install bearing cone (5) on the wheel spindle and in cover (6).
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24. 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.
25. Put retainer (2) in position on the wheel spindle without shims. Install bolts. Tighten the bolts
to a torque of 47 N·m (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 00:24:44 UTC+0800 2020
9/9
2020/2/28

Shutdown SIS
Previous Screen
SENR36490005
Tandem Housings
SMCS - 4064-011; 4064-012
Remove Tandem Housings
Start By:
a. remove drive chains
1. Fasten a hoist to tandem housing (2) as shown. Install tooling (A) on the brake and wheel
spindle housings and the hoist.
2. 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.
1/3
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3. Disconnect air line (1) from the junction block on the frame.
4. Remove nuts (4) and the washers that hold tandem housing (2) to final drive housing (3).
5. Remove tandem housing (2). Weight is 594 kg (1310 lb.).
6. Do Steps 1 through 5 for the other tandem housing.
Install Tandem Housings
1. Fasten a hoist and tooling (A) to the tandem housing.
2. Put tandem housing (1) in position on final drive housing (3).
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 N·m (185 ± 10 lb.ft.).
2/3
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4. Remove the hoist and tooling (A) from the tandem housing.
5. Connect the air line to its correct location.
6. Do Steps 1 through 5 for the other tandem housing.
End By:
a. install drive chains
Fri Feb 28 00:25:40 UTC+0800 2020
3/3
2020/2/28

Shutdown SIS
Previous Screen
SENR36490006
Drive Sprockets
SMCS - 4072-011; 4072-012
Remove Drive Sprockets
Start By:
a. remove tandem housings
1. Remove nut (1) with tool (A).
1/3
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2. Remove sprockets (2) and (3). Weight of one sprocket is 15 kg (32 lb.).
3. 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.
2. Put sprocket (2) in position on the shaft. Install sprocket (2) with the hub toward the hub on
sprocket (1).
3. 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:
a. Tighten the nut to a torque of 135 N·m (100 lb.ft.) with tool (A).
b. Turn the sprockets to put the bearings in their seats.
c. Hit the hub of the sprocket with a large punch and a hammer.
2/3
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d. Do Steps a, b and c until the nut does not turn when it is tightened.
e. Loosen the nut.
f. Tighten the nut to a torque of 70 N·m (50 lb.ft.).
g. If the nut is in a locking position, install the cover and the bolts that hold it.
h. If the nut is not in a locking position, tighten the nut to the next nearest locking position. Install
the cover and the bolts.
4. Do Steps 1 through 3 for the other drive sprockets.
End By:
a. install tandem housings
Fri Feb 28 00:26:36 UTC+0800 2020
3/3
2020/2/28

Shutdown SIS
Previous Screen
SENR36490007
Final Drives
SMCS - 4050-015
Disassemble Final Drives
1/10
2020/2/28

Start By:
a. remove axles
1. Remove the nut that holds the sprockets on the shaft with tooling (A). Install tooling (B) on the
shaft.
2/10
2020/2/28

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2. 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).
3. 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.
4. Remove nuts (2) and the washers that hold the tandem housing to the final drive housing.
5. 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.
6. Remove tooling (B) from the shaft. Do not remove tooling (B) from the sprockets.
7. Move the tandem housing away from the machine. Weight is 1043 kg (2300 lb.).
8. Remove O-ring seal (3) from the housing. Remove bearing (4) from the shaft.
9. Remove bolts (5) that hold retainer (6) to the housing. Remove retainer (6).
10. Remove the washer that is between the final drive housing and retainer (6). The washer is in
three sections.
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11. 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.
12. Pull the outer housing (8) from the inner housing with tooling (F).
13. Remove two oscillation bearing rings (9) from the housings. Remove washer (7) from the
inner housing. Washer (7) is in three sections.
14. 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.
15. Remove nuts (10) and the washers that hold inner housing (13) to the bevel gear case.
16. 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.
17. 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).
18. 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.).
4/10
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20. 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.
21. 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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26. Remove bearing (28) from shaft (27) with tooling (J).
27. 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.
28. Do Steps 1 through 27 for the other final drive.
Assemble Final Drives
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Caterpillar cat 140 g motor grader (prefix 5md) service repair manual (5md00001 and up)

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