Caterpillar Cat D7G TRACK-TYPE TRACTOR (Prefix 44W) Service Repair Manual Instant Download (1)

1

• START BY
• remove track roller frames
• Drain the oil from the final drive case.

2
2. Remove cap (1) and the gasket.
3. Remove lock (2) and nut (3) from the sprocket
shaft.
4. Remove retainer (4) and the shims from the
sprocket shaft.

1. Remove support (5) from the holder assembly.
   Remove the seal ring from the holder assembly.
2. Remove seal (6) and bearing (7) from support (5).

7. Remove the nut and bolt (8). Remove lock (9)
from the holder assembly.
3
NOTICE Do not use more than 50 ton (445 kn) of
pressure to remove the holder assembly.
8. Install tooling (A) as shown and loosen holder
assembly (10) from the taper on the sprocket
shaft.
9. Remove tooling (A). Fasten a hoist and remove
holder assembly (10) and adjusting nut (11) as a
unit. The weight is approximately 80 lb. (36 kg.).
10. Remove Duo-Cone seal (12) from adjusting nut
(11).
4
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11. Remove Duo-Cone seal (13) from the
sprocket. NOTE Keep the Duo-Cone seals for the
sprocket and adjuster nut together so they will
not be mixed at assembly.
12. Remove adjusting nut (11) from holder
assembly (10).
13. Remove gasket (14) from holder assembly (10).
NOTE Do Steps 14 and 15 for earlier models
only. 14. Remove the seal from the holder. See
illustration 90756X4.
6
15. Remove cage (15) from the holder with tooling
(F) as shown.

• NOTE Do Step 16 for later models only.
• Remove cage (15) from the holder.
• Remove bearing cup (16) from cage (15) with
  tooling (B).

18. Bend lock (17) down.
19. Remove bearing cone (18) as follows a)
Loosen nut (18) with tool (C) until there is a
distance of 1 in. (25.4 mm) between the nut and
the sprocket.
7
b) Remove tool (C) from the nut.

• Turn nut (18) in until tool (D) can be installed
  between bearing cone (18) and nut (17).
• Remove bearing cone (19), nut (18) and lock from
  the sprocket shaft.
• 20. Remove the key from the sprocket shaft.

The sprocket is installed on the hub with a force
of 60 to 65 tons (535 to 580 kN). Keep away from
the area of the sprocket when it is loosened from
the hub with tooling (E).
21. Assemble tooling (E) and remove the sprocket
as follows
a) Put 5P6222 Adapter (21) on the hub assembly.
Turn the adapter until it is .25 in. (0.64 mm)
from the sprocket hub. Put 6V3123 Adapters (20)
in the puller holes for the sprocket. Use the
6V3124 Nuts to hold adapters (20) in position.
Install each nut so the flat end of the nut is
even with the end of the threads on the adapter
and the drill point is toward the outside
diameter of the sprocket. The angle face of the
nut must be toward the sprocket.
8
b) Install 5P5207 Stud (22) in 5P6222 Adapter
(21). Slide 5P5212 Plate Assemly (22) and 5P5201
Cylinder (23) with the piston end away from the
sprocket over stud (24) and against adapter (21).
c) Put 6V4000 Head (25) on stud (24) so the flat
side of the head is toward cylinder (23).
d) Put 6V3125 Arms (27) in position in the head
and the adapters and install 6V3126 Pins (26) and
6V3127 Locks (28).
e) Put 5P5208 Nut (29) on stud (24) until it is 1
in. (25.4 mm) from head (25). Use tooling (E) to
loosen the sprocket from the hub.
9

• Typical Example
• Fasten a hoist to the sprocket. Remove sprocket
  (30). The weight is 400 lb. (181 kg).
• NOTE Keep the Duo-Cone seals for the sprocket
  and final drive case together so they will not be
  mixed at assembly.
• Remove the Duo-Cone seals from the sprocket and
  the final drive case.

Install Sprocket Assemblies
10
Typical Example NOTE The rubber seals and all
of the surfaces that make contact with the rubber
seal must be clean and dry with no damage to the
contact surfaces. Put clean oil on the contact
surfaces of the metal seals.

1. Install the Duo-Cone seal in the final drive case
   with tool (A).
2. Install Duo-Cone seal (1) in the sprocket with
   tool (A).

Typical Example
11
3. Fasten a hoist to sprocket (2) and put it in
position on the final drive hub. Make sure the
splines of the sprocket and the hub are in
alignment. Push the sprocket on the hub as far as
possible by hand. NOTICE Make sure the splines
on the hub are clean and dry.
4. Put tooling (C) in position to install
sprocket (2) as follows
a) Install 5P6222 Adapter (3). Turn the adapter
until it is fully on the final drive hub.
b) Install 5P5207 Stud (4) in adapter (3).
c) Slide 5P6220 Sleeve (5) over adapter (3) and
stud (4) until it makes contact with sprocket (2).
12
d) Slide 5P5212 Plate (6) on stud (4) until it
makes contact with sleeve (5).
e) Put 5P5201 Cylinder (7) on stud (4). Slide the
cylinder on the stud until the cylinder makes
contact with plate (6).
f) Put 5P5208 Nut (8) on stud (4) until the nut
is .25 in. (6.4mm) from cylinder (7). Connect
5P3100 Pump Group to cylinder (7) and use a force
of 60 to 65 tons (535 to 580 kN) to push the
sprocket in the final drive hub.
Be sure the piston of cylinder (7) is retracted
before the cylinder is removed.
5. Remove tooling (C). Check the distance from
the sprocket face to the spline shoulder on the
final drive gear hub. The distance must be .500
.060 in. (12.7 1.52mm).
13
6. Install the lock and nut (9). Use tool (B) and
tighten nut (9).
7. Heat bearing cone (10) to a maximum
temperature of 275F (135C). Install bearing
cone (10) on the hub and against the nut.
8. Lower the temperature of bearing cup (11).
Install bearing cup (11) in cage (12).
9. Put cage (12) in position in holder (13) with
groove (15) of the cage in alignment with
dowel (14) of the holder.
14
10. Install a new gasket (16) in the holder.
NOTE Step 11 is for earlier models only. 11. Put
liquid soap on the seal and install the seal in
the holder as shown in illustration 90754X3.

• Put 5P960 Multipurpose Type Grease on the threads
  of adjusting nut (17) and on the face of the
  adjusting nut that makes contact with gasket
  (16).
• Install adjusting nut (17).
• NOTE The rubber seals and all of the surfaces
  that make contact with the rubber seal must be
  clean and dry with no damage to the contact
  surfaces. Put clean oil on the contact surfaces
  of the metal seals.

15
14. Install Duo-Cone seal (18) in the adjusting
nut with tool (A).
15. Install Duo-Cone seal (19) in the sprocket
with tool (A).

1. Install the key in the sprocket shaft.
2. Fasten a hoist to the holder assembly and the
   adjusting nut and put them in position on the
   sprocket shaft. Make sure the groove on the
   holder assembly is in alignment with the key on
   the sprocket shaft.

18. Put lock (20) in place and install the bolt
and nut that hold the lock in place.
19. Lower the temperature of bearing (21).
Install bearing (21) in support (23).
16
20. Install seal (22) in support (23) with the
lip of the seal toward the outside of the
support. The seal is installed even with the
outside edge of the support. Put clean oil on the
lip of the seal.

• 21. Put 5P960 Multipurpose Type Grease on the
  inside diameter of support (23). Install support
• (23) on the assembly.
• Install shims (25) for the correct alignment of
  the sprocket and track roller frame. See
  ALIGNMENT OF TRACK ROLLER FRAME in SPECIFICATIONS
  to find the correct amount of shims.
• Fill the inside of retainer (24) with 5P960
  Multipurpose Type Grease. Put the retainer in
  position on the dowels of the holder.

1. Install nut (27) with tool (D) and a torque
   wrench. Tighten the nut to a torque of 1100 to
   1200 lb.ft. (1491 to 1627 Nm).
2. Install lock (26) to hold the nut in position.

17

• Install the gasket and cap (28) on the support.
• Make an adjustment of the final drive bearings
  after the track roller frames are installed. See
  ADJUSTMENT FOR FINAL DRIVE BEARINGS.
• Fill the final drive case with oil to the correct
  level. See MAINTENANCE GUIDE.
• NOTE A pressure relief valve must be used with
  the grease fitting so the pressure can be
  released before the grease fitting is removed.
• Remove plug (29) from the cap and install a
  grease fitting to fill the retainer cavity with
  5P960 Multipurpose Type Grease. Install plug
  (29).
• END BY
• a) install track roller frames

Copyright 1993 - 2021 Caterpillar Inc. All Rights
Reserved. Private Network For SIS Licensees.
Tue Aug 17 092353 UTC0800 2021
18
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Product TRACK-TYPE TRACTOR Model D7G TRACK-TYPE
TRACTOR 44W Configuration D7G LGP TRACTOR /
POWERSHIFT / 44W00001-UP (MACHINE) POWERED BY
3306 ENGINE
Disassembly and Assembly D7G TRACTOR POWER
TRAIN Media Number -SENR7119-02 Publication Date
-01/02/1983
Date Updated -14/10/2004
SENR71190013
Final Drive Cases, Gears, Idler Pinions And
Bearings SMCS - 4059-11 4075-12 Remove Final
Drive Cases, Gears, Idler Pinions And Bearings
19
START BY a) remove sprocket assemblies
1. Remove bolts (1) that hold final drive case
(2) in position.
20

• Install two 5/8"-11 NC guide bolts (3). Install
  three 1/2"-13 NC forcing screws (4).
• Tighten the forcing screws evenly until the case
  is approximately .25 in. (6.4 mm) away from the
  steering clutch case.
• Install a piece of wire around the guide pins to
  hold the idler pinion in place.
• NOTICE
• The wire is to keep the planet carrier in
  position so it will not fall from the steering
  clutch case when the final drive case is removed.

5. Tighten the forcing screws until tool (A) and
a hoist can be fastened to final drive case (2).
Remove final drive case (2). The weight is 280
lb. (127 kg.)
21
6. Remove the plugs for the dowels that hold race
and roller assemblies (5) and (6) in place with
tooling (B).
7. Remove the dowel for race and roller assembly
(6) with a 10-32 screw (7). Remove the dowel for
race and roller assembly (5) with a 1/4"-20 NC
bolt.
8. Use tooling (C) and remove race and roller
assemblies (5) and (6) from the final drive case.
9. Install tool (D) on gear (8). Fasten a hoist.
Remove gear (8) and hub (9) from the sprocket
shaft. Put the gear and hub on wood blocks. The
weight of the gear and hub is approximately 350
lb. (159 kg)
22

• Typical Example
• Remove bearing cone (11) from the hub with
  tooling (E).
• Remove nuts (10) and locks from bolts (12).
  Remove bolts (12) with a soft punch and hammer.

Typical Example 12. Use a nylon strap and a pin
or bolt with a length that is longer than the
inside diameter of the hub to fasten a hoist to
the hub. Remove hub (9) from gear (8). The weight
is 218 lb. (99 kg)
13. Remove bearing cup (13) if necessary.
23
14. Remove the wire from the gear and pinion.
Fasten a hoist and remove gear (14) and the
pinion from the steering clutch case. The weight
is 120 lb. (54 kg).
15. Remove bearing race (15) with tooling (F)
from the pinion shaft. NOTE Step 16 is for later
models only with a two piece pinion and gear
assembly. Earlier models, the pinion and gear are
one piece. NOTICE Too much pressure on the
pinion shaft can cause damage to the gear.

• Typical Example
• Remove pinion shaft (16) from the gear as
  follows
• Put the gear and pinion shaft in a press as
  shown.
• Put a small amount of pressure on the pinion
  shaft with the press. Push the ring in the groove
  on the pinion shaft with a hammer and punch. The
  ring will stay in the groove because of the
  pressure on the pinion shaft.
• When the ring is completely in the groove, the
  pinion shaft will slide out of the gear. The
  weight of the pinion is 85 lb. (39 kg).
• Remove bearing race (17) from the pinion shaft
  with tooling (F).
• Drain the oil from the steering clutch and bevel
  gear case.

24
19. Bend locks (18) down. Remove bolts (19) and
locks (18).
20. Install two 1/2"-13 NC forcing screws (21) in
bearing cage (20). Tighten the forcing screws
evenly and remove bearing cage (20) from the
steering clutch case.
21. Use a 1/4"-20 NC bolt (22) to remove the
dowel from cage (20).
22. Remve race and roller assembly (23) from
bearing case (20) with tooling (C).
25
23. If necessary, remove bearing race (24) with
tooling (F) from the pinion.
Install Final Drive Cases, Gears, Idler Pinions
And Bearings
1. Heat bearing race (1) to a maximum temperature
of 275F (135C). Install bearing race (1) on the
pinion shaft. NOTICE All race and roller
assemblies with snap rings must be assembled with
the snap ring next to the gear teeth.
26
2. Lower the temperature of roller and race
assembly (3). Make sure the hole in the race and
roller assembly is in alignment with the hole in
cage (2) and install race and roller assembly (3).
3. Install dowel (4) to hold the race and roller
assembly in the cage. Use a 1/4"-20 NC bolt (5)
to install the dowel.
4. Put 7M7260 Liquid Gasket Material on the
contact surfaces of the cage and steering clutch
case. Put cage (2) in position in the steering
clutch case. Make sure the oil groove next to the
race and roller assembly is at the bottom.
5. Install four locks (6) and eight bolts (7)
that hold the cage in place. Bend the locks up.
27
6. If a separation of the idler gear and pinion
was made, install a new retainer in the pinion.
Install the gear over the pinion so the deep
chamfer is used to put the retainer under
compression. Make sure the retainer is engaged in
the groove of the gear.
7. Heat bearing races (8) to a maximum
temperature of 275F (135C) and install them on
each end of pinion (9).

• Put 5P960 Multiurpose Type Grease in the roller
  assemblies to hold the rollers out for
  installation of gear (10) and pinion (9). Fasten
  a hoist and install gear (10) and pinion (9) in
  the steering clutch case.
• Fasten a wire around the guide bolts, gear (10)
  and pinion (9).
• NOTE The wire will hold the gear and pinion in
  position until the final drive case is installed.

10. Fasten a hoist to hub (11) and put it in
position in gear (12). Install the bolts (from
the top side), locks and nuts that hold the hub
and gear together.
28
11. Heat bearing cone (13) to a maximum
temperature of 275F (135C). Install bearing
cone (13) on the hub.

1. Lower the temperature of bearing cup (14).
   Install bearing cup (14) in the steering clutch
   case. Make sure the bearing cup is tight against
   the surface of the counterbore.
2. Use tooling (A) and a hoist and put the hub and
   gear in position on the sprocket shaft.

14. Lower the temperature of race and roller
assemblies (15) and (16). Make sure the hole in
the race and roller assemblies are in alignment
with the dowel holes in the case. Install the
race and roller assemblies (15) and (16) in the
final drive case.
29

• Typical Example
• Install the dowels and plugs in final drive case
  (17) to hold the race and roller assemblies in
  place. Put 5P960 Multipurpose Type Grease on the
  roller assemblies to hold the rollers out to
  prevent damage to parts when final drive case
  (17) is installed.
• Install tooling (B) and a hoist to the final
  drive case. Put 7M7260 Liquid Gasket Material on
  the contract surfaces of the steering clutch case
  and final drive case.
• Put the final drive case on the guide bolts and
  remove tooling (B) and the wire used to hold the
  pinion.

18. Push final drive case (17) against the
steering clutch case. Install bolts (18) and
washers that hold final drive case (17). Tighten
the bolts to a torque of 200 20 lb.ft (270 25
Nm).
30
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19. Fill the steering clutch case and final drive
cases with oil to the correct level. See
Maintenance Guide. END BY a) install sprocket
assemblies
Copyright 1993 - 2021 Caterpillar Inc. All Rights
Reserved. Private Network For SIS Licensees.
Tue Aug 17 092449 UTC0800 2021
32
Shutdown SIS
Previous Screen
Product TRACK-TYPE TRACTOR Model D7G TRACK-TYPE
TRACTOR 44W Configuration D7G LGP TRACTOR /
POWERSHIFT / 44W00001-UP (MACHINE) POWERED BY
3306 ENGINE
Disassembly and Assembly D7G TRACTOR POWER
TRAIN Media Number -SENR7119-02 Publication Date
-01/02/1983
Date Updated -14/10/2004
SENR71190014
Adjustment For The Final Drive Bearings SMCS -
4059-11 4075-12 Adjustment For The Final Drive
Bearings
33
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