Caterpillar Cat 14G MOTOR GRADER (Prefix 96U) Service Repair Manual (96U04298-07045)

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Service Repair Manual
Models 14G MOTOR GRADER
2
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Product MOTOR GRADER Model 14G MOTOR GRADER
96U Configuration 14G MOTOR GRADER
96U04298-07045 (MACHINE) POWERED BY 3306 ENGINE
Disassembly and Assembly 14G MOTOR GRADER POWER
TRAIN Media Number -SENR7068-02 Publication Date
-01/10/2004
Date Updated -03/11/2004
SENR70680012
Differential SMCS - 3258-11 3258-12 3258-15
3258-16 Remove Differential

• START BY
• remove fuel tank
• remove fan drive
• remove radiator and guard
• remove air tank
• remove rear bumper
• remove parking brake rotochamber
• remove axles

3
1. Loosen clamp that fastens hose (1) to tube
(2). Remove bolt that fastens bracket (3) to
flywheel housing and remove tube (2).
2. Drain the oil from the transmission. Put
identification on oil lines (4) for assembly
purposes. Disconnect oil lines from the relief
control valve.
3. Remove two bolts and move valve assembly (5)
from the transfer gear case. Fasten assembly to
frame so it is not damaged when the differential
is removed.
4. Remove lifting plates and install tool (A) and
a hoist on the transfer gear case. Remove the
bolts that fasten the transfer gear to the
flywheel housing.
5. Disconnect the hose assembly from the top of
the differential lock control valve. Disconnect
wire (8) from the wiring harness. Remove two
bolts and the differential lock control valve (6)
from the differential case.
4
6. Remove tube assembly (7) and the O-ring seal
from the top of the differential case.
7. Loosen the nuts on bolts (9) on each side of
the flywheel housing. Turn bolt (9) until they
are against the frame. Tighten the nuts on the
bolts.

1. Loosen nuts (10) and slide them over cables (11).
   Remove bolts (14). Slide retainer (12) over
   cables (11).
2. Remove couplings (13) from the transmission
   housing with a screwdriver. Lift the transmission
   control cables out of the notches in the links
   in the transmission control valves.

10. Install three 5/8"-11 NC forcing screws (15)
in the differential carrier. Remove the nuts that
fasten the differential carrier to the bevel
gear case. Move the differential away from the
bevel gear case with the forcing screws.
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11. Remove bracket (17) from the frame and the
differential and transmission as a unit (16). The
weight is 2650 lb. (1202 kg).

1. Fasten a hoist to the differential as shown.
2. Remove nuts (19) that hold differential (18) to
   the transmission.
3. Remove differential (18). The weight is 650 lb.
   (295 kg).

Install Differential
NOTE Inspect all O-ring seals and make any
replacements if necessary.

1. Fasten a hoist and nylon straps to the
   differential as shown.
2. Put the O-ring seals in position and install
   differential (1) on the transmission.

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1. Put tool (A) and a hoist on the transfer gear
   case and install the transmission and
   differential assembly in position on the
   flywheel housing and the bevel gear case.
2. Remove tool (A) and install bracket (2) to the
   frame.

1. Install lifting plates (3) on the transfer gear
   case.
2. Loosen nuts (6) on bolts (5) on each side of the
   machine. Turn bolts (5) away from the frame.
   Tighten nuts (6).
3. Connect oil lines (4) to their correct location
   on the relief control valve.

8. Put cables (9) in position in the links of the
transmission control valve. Push couplings (8)
into position in the transmission. Tighten nuts
(10) against the couplings. Install the bolts
that hold retainer (7) to the transmission.

1. Put differential lock control valve (14) with
   O-ring seal in position on top of the
   differential case. Put hose assembly (12) with
   clip in place and install two bolts. Connect wire
   (13) to the wiring harness. Connect the hose
   from the transmission relief valve to the top of
   the differential lock control valve.
2. Install the O-ring seal and tube assembly (11) on
   top of the differential case.

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11. Install valve assembly (15) in position on
the transfer gear case.

• Put water tube (16) in position and install bolt
  that fastens bracket (17) to the flywheel
  housing. Install hose with clamp on the opposite
  end of tube.
• Fill the transmission with oil to its correct
  level. END BY
• install axles
• install parking brake rotochamber
• install rear bumper
• install air tank
• install radiator and guard
• install fan drive
• install fuel tank

Disassemble Differential
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START BY a) remove differential
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1. Remove O-ring seals (1) and (4) from the carrier
   assembly.
2. Bend the tab on lock and remove nut (5) with tool
   (A). Remove lock (3) and washer (2) from the
   pinion shaft.

3. Install differential and bevel gear assembly
in position on tool (B). The weight of the
assembly is 670 lb. (304 kg).

1. Remove O-ring seal (11) from the carrier
   assembly. Bend the tab on locks (7) and remove
   bolt and lock (9) from each side of cap.
2. Remove wire (6) and nuts (10) from the studs on
   each side of differential.
3. Remove cap (8) from assembly.

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7. Install a strap and hoist through the
differential and remove pin (12). Remove
differential assembly (13) from carrier
assembly. The weight of the assembly is 350 lb.
(159 kg).
8. Remove the cage (15) and nut (14) from the
differential assembly as a unit.
9. Remove nut (14) and bearing cup (16) from cage
(15).
10. Use tooling (C) to remove bearing cone (17)
from housing assembly.

1. Put identification "X" on both halves of housing
   assembly (18) for installation purposes.
2. Remove bolts (19) and the outer half of housing
   assembly (18) from the inner half.

12

1. Remove washer (20) and gear (22) from the
   differential.
2. Remove the washers (23) and spider pinion
   assemblies (21) from spider (24).

15. Remove the bearings from the spider pinion
assemblies (21) with a press and tooling (D).
16. Remove gear (25) and washer from housing
assembly.
17. Turn housing assembly over and remove cage
(26).
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18. Remove nut (27) and seal rings (29) and metal
ring (28) from cage.
19. Remove bearing cup (30) from cage (by hand).
20. Remove bolts (31) that fasten the bevel gear
(33) and housing (32) to the inner half of
housing (18). Use two men to remove assembly
from housing (18). The weight of the assembly is
79 lb. (36 kg).
21. Remove bevel gear (33) from housing (32).
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NOTE Use tooling (F) only if bearing must be
replaced. Bearing will be damaged. 22. Use
tooling (F) to remove bearing (34) from housing.
23. Use a hammer and punch to remove two dowels
from housing (32).
24. Remove piston (36) from piston housing.
Remove seals (35) and (37) from piston.
25. Remove nine discs (38) and eight disc
assemblies (39) from housing.
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26. Remove spacer (40) from housing.
27. Bend the tabs on two locks and remove tube
assembly (41) and gasket.
28. Install tooling (G) on carrier to remove
pinion (42). NOTICE During the removal of the
pinion the lower pinion bearing cone will be
free to fall if not held.
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29. Use tooling (G) to remove bearing cup (43)
from housing.
30. Turn the carrier assembly over on the
opposite side and use tooling (H) to remove seal.
31. Install tooling (G) on carrier and remove
bearing cup (44).
32. Install tooling (J) between pinion and
bearing. Install assembly in a press and remove
bearing (45). NOTICE The pinion must be held
to prevent damage during bearing removal.
Assemble Differential
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1. Lower the temperature of bearing cup (1) and
install it in the differential carrier.
2. Install seal in carrier as shown with tooling
(A). Install the seal with the lip toward the
inside of the carrier.
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3. Turn the carrier assembly over on tool (B) and
lower the temperature of the bearing cup (2) and
install it in carrier.
4. Heat bearing cone (4) to a temperature of
275F (135C) and install cone on pinion (3).
5. Put the pinion (3) in the carrier housing (5)
and hold it in position with a hydraulic jack.
6. Heat bearing cone (6) to a temperature of
275F (135C) and install it on pinion.
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7. Install washer (7) on pinion with the tab on
washer in the pinion slot (groove).
8. Install lock (9) and nut (8) on pinion with
the chamfer side of nut down. Tighten nut finger
tight.
9. Put two 1/4" dowels against the pinion splines
180 apart.
10. Install tooling (E) over pinion shaft and
dowels.
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11. Check the torque needed to turn pinion shaft
(any resistance to turn shaft will be caused by
the carrier housing lip type seal on the pinion
shaft). Note the torque reading. Remove torque
wrench.

1. Install tooling (F) on nut (8). Install the
   torque wrench on tooling (E). Tighten nut (8)
   with tooling (F) to a torque of 0.8 0.6 Nm
   (7.0 5.0 lb in) more than the torque in Step
   11.
2. Remove tooling (E) and (F).

14. Bend a tab on lock (9) to hold nut (8) in
position on pinion shaft.
15. Turn the carrier over and install gasket and
tube assembly (10).
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16. Install spacer (11) in the inner half of
housing assembly (12).
17. Install nine discs (13) and eight disc
assemblies on the spacer (11) starting with a
disc.
18. Install seals (14) and (16) on the inside and
the outside of piston (15). Install the seals so
the lips will be toward the bottom of piston
housing. Put 1E0371 oil on the seal surfaces and
in the piston housing bore.
19. Install two dowels (17) in piston housing to
a height of .145 .004 in. (3.68 0.10 mm).
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20. Heat bearing cone (18) to a temperature of
275F (135C) and install on piston housing.
21. Turn housing assembly over and put bevel gear
(19) in position on the piston housing.
22. With two persons turn the bevel gear and
piston housing over and install it on the inner
half of housing (12). The weight of the assembly
is 79 lb. (36 kg).
23. Install bolts (20) and tighten to a torque of
320 15 lb.ft. (434 20 Nm).
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24. Install bearing cup (21) in cage (22).
Figure 1. Correct Method To Make New Rings Ready
For Installation NOTE There is a correct method
to make the new rings (23) ready for
installation. Use your hands on each end of the
ring to pull the ends several inches by each
other.
Figure 2. The Ends Of The Ring Must Make Contact
With The Inner Notches Use care to keep the ring
shape like a circle. This makes an even bend (or
ring "set") all the way around the ring. When
the ring is in the groove, the notches in the
ends must be fully engaged with each other so
the ring will not make contact with the edge of
the cage bore. That is, the notches must be
fully engaged and the ends must be together.
Figure 3. Wrong Method To Make New Rings Ready
For Installation
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NOTICE Do not bend the ring as shown in Figure
3. This does not make an even bend all the way
around the ring.

1. Install nut (24) and two plastic seals (23) on
   cage with the joints 180 apart.
2. Install ring (25) on cage with tool (C).

27. Install cage (22) on bearing.

1. Turn assembly over and install washer (27) on the
   face of the piston housing. Make sure the
   notches in washer (27) are in alignment with the
   dowels in the piston housing.
2. Install gear (26) in position in housing. Be sure
   gear is in alignment with all discs and disc
   assembly.

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30. Use tooling (D) and a suitable press in order
to install four spider pinion gears (28). The
face of the sleeve bearing must be flush with
the face of the pinion gear.
31. Install spider pinion assemblies (29) and
washers (31) on spider (30). Install assembly in
the inner half of housing assembly (12). Make
sure the notches (Y) in the washers are on the up
side.
32. Install gear (33) on the spider pinions. Put
washers (32) in position on the gear.
33. Put the outer half of housing (12) in
position on the inner half of housing. NOTE The
outer half of housing (12) must be put in its
correct position according to the identification
marks that were made when the differential was
disassembled. The notches in washers (31) and
(32) must be in alignment with the dowels in the
outer half of housing (12). A seal pick can be
used to put dowels and notches in alignment.
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NOTE If any dowel is in need of replacement,
install to a height of .145 .004 in. (3.68
0.10 mm).

1. Install bolts (35) and tighten to a torque of 95
   5 lb.ft. (129 7 Nm).
2. Heat bearing cone (34) to a temperature of 275F
   (135C), and install in position on the outer
   half of housing.

36. Install nut (38) and bearing cup (36) in cage
(37).
37. Install cage (37) in position on bearing (34).
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38. Put seal and ring (40) in position on the
carrier housing and install differential assembly
(39). The weight of the assembly is 350 lb. (159
kg). NOTE Make sure the hole (Z) in cage (37)
is in alignment with the seal and ring (40) in
the carrier housing.

• Install pin (42) in cage.
• Install cap (41) in position on the differential
  carrier. Tighten nuts to a torque of 75 lb.ft.
  (102 Nm).
• NOTE Make sure the cap is in alignment with the
  hole in the cap.

41. Install a strap and hoist on differential and
bevel gear group (43) and remove from tool (B).
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42. Use tooling (G) and a strap and hoist to
place the differential and bevel gear group with
the axle centerline in the vertical position and
the teeth of the bevel gear toward the top as
shown.
43. Install tooling (H) on the carrier housing
and bevel gear group (19). Check the bevel gear
to pinion gear clearance (backlash) while the
pinion is held stationary. Make an adjustment to
nut (24) in cage (22) with a .25 x .25 in. (6.35
x 6.35 mm) steel bar until the gear clearance
(backlash) between the bevel gear (19) and the
pinion is .010 .004 - .003 in. (0.25 0.10 -
0.08 mm). Make adjustments to nut (38) to remove
end play while (backlash) adjustment to nut (24)
is kept constant.
44. Tighten nut (38) to be sure the differential
bearings are against their seats. Loosen nut
(38), then finger tighten nut (38) to remove end
play.
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1. Install tooling (H) on the carrier housing and on
   the end of housing shaft as shown. Tighten nut
   (38) 1 to 2 notches and measure dimensions (X).
   Dimension (X) must change .008 .002 in. (0.20
   0.05 mm).
2. Tighten four nuts (45) to a torque of 280 20
   lb.ft. (380 27 Nm).

47. Put locks (44) in position on the cap.
Install the locks and the bolts that hold locks
(44). Bend the locks against the bolts. Install
the wires on studs.
48. Install O-ring seals (46) and (47) on carrier
assembly. END BY a) install differential
Copyright 1993 - 2020 Caterpillar Inc. All
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Licensees.
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30
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Product MOTOR GRADER Model 14G MOTOR GRADER
96U Configuration 14G MOTOR GRADER
96U04298-07045 (MACHINE) POWERED BY 3306 ENGINE
Disassembly and Assembly 14G MOTOR GRADER POWER
TRAIN Media Number -SENR7068-02 Publication Date
-01/10/2004
Date Updated -03/11/2004
SENR70680013
Transmission Oil And Scavenge Pump SMCS -
3153-11 3153-12 3153-15
31
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Remove Transmission Oil And Scavenge Pump
1. Loosen bolts (1) and slide the alternator to
loosen the fan belts. Remove the fan belts from
the pulley on the transmission oil pump.
2. Remove transmission charging inlet tube
assembly (2) and differential sump scavenge inlet
tube assembly (3).
3. Remove transmission scavenge inlet tube
assembly (4) and transmission and differential
sump scavenge outlet tube assembly (5).
4. Remove pulley (6) from the transmission oil
and scavenge pump. Remove bolts (7) that fasten
plate (8) to the radiator assembly. The plate can
not be removed because of the location of a
wiring harness. The plate can be moved so the
transmission oil and scavenge pump can be removed.
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5. Remove mounting bolts (9) and with two persons
lower the transmission oil and scavenge pump (10)
from vehicle. The weight of the pump is 75 lb.
(34 kg).
Install Transmission Oil And Scavenge Pump
1. With two persons install transmission oil and
scavenge pump (1) in position on the transmission.
2. Install pulley (2) on pump coupling. Install
plate (3) on the radiator assembly.

1. Inspect all O-ring seals and make replacements if
   needed.
2. Install tube assemblies (4) and (5) and their
   O-ring seals.

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5. Install tube assemblies (6) and (7) and their
O-ring seals.

1. Put fan belts (8) in position on the alternator
   pulley.
2. With the use of a Borroughs Gauge No. BT-33-72C
   measure the belt tension of the belt farthest
   from the engine block. The gauge reading should
   be 120 5 lb. (534 22 N). Used belt readings
   should be 90 10 lb. (400 44 N).
3. Tighten bolts (9).

Disassemble Transmission Oil And Scavenge Pump
START BY a) remove transmission oil and scavenge
pump 1. Thoroughly clean the outside of the pump.
2. Remove bolts (2) and cage (1) from the
manifold assembly.
35
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