994H Wheel Loader Power Train Caterpillar

Pump Drive (Front) - Assemble

Usage:

994H DWC

Assembly Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	1P-0510	Driver Gp	1
C	1P-0520	Driver Gp	1
D	138-7573	Link Bracket	2
F	1P-1861	Retaining Ring Pliers	1
G	1U-8846	Gasket Sealant	1
H	7M-7456	Retaining Compound	1
J	8T-5096	Dial Indicator Gp	1
K	8H-8581	Feeler Gauge	1

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Illustration 1	g02596305

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Illustration 2	g02596301

Note: Apply Tooling (H) to the joint surface of the bushings and the case.

Use Tooling (C) to Install bushings (41) and the dowels.

Use Tooling (C) to install bearing cups (40) .

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Illustration 3	g02597016

Install tube assembly (39) .

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Illustration 4	g01356154

Install adapter (38) into pump drive gear (35) . Use Tooling (F) to install retaining ring (37) .

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Illustration 5	g01356621

Raise the temperature of bearing cones (36) and install bearings (36) onto pump drive gear (35) .

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Illustration 6	g02596298

Install pump drive gear (35) .

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Illustration 7	g02596336

Raise the temperature of bearing cones (34) . Install bearing cones (34) onto pump drive gear (33) .

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Illustration 8	g02596281

Use two people in order to install pump drive gear (33) . The weight of pump drive gear (33) is approximately 29 kg (65 lb).

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Illustration 9	g01355817

Install adapter (31) onto pump drive gear (29) . Use Tooling (F) to install retaining ring (31) .

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Illustration 10	g01356633

Raise the temperature of bearing cones (30) . Install bearing cones (30) onto pump drive gear (29) .

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Illustration 11	g02596280

Install pump drive gear (29) .

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Illustration 12	g02596277

Attach Tooling (D) and a suitable lifting device to cover (26) . The weight of cover (26) is approximately 45 kg (100 lb).

Apply a continuous bead of Tooling (G) to the mating surface of the housing and cover (26) .

Position cover (26) . Install bolts (27) and bolts (28) .

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Illustration 13	g01359446

Note: Be sure that the bushing is engaged with the dowel in the case.

Apply Tooling (H) to the mating surface of bushing (13) . Install the dowel and bushing (13) into bearing cage (10) . Lower the temperature of bearing cup (14) and bearing cup (19) . Use Tooling (A) to install bearing cup (14) and bearing cup (19) .

Lower the temperature of bearing cup (25) . Use Tooling (C) to install bearing cup (25) into bearing cage (21) .

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Illustration 14	g02596338

Install bearing cages (10) , (16) , and (21) .
Note: Do not install any shims at this time.

Install bolts (9) , (15) , and (20) . Tighten bolts (9) , (15) , and (20) until the bolts are finger tight.

Tighten two of bolts (9) , (15) , and (20) to a torque of 34 N·m (300 lb in).

Rotate the center shaft for three revolutions in order to properly seat the bearings.

Repeat 19 and 20until the torque on bolts (9) , (15) , and (20) stabilizes.

Loosen bolts (9) , (15) , and (20) and rotate the center shaft for three revolutions.

Tighten bolts (20) to a torque of 3.4 N·m (30 lb in).

Rotate the center shaft for three revolutions.

Repeat 23 and 24 until the torque on bolts (20) stabilizes.

Torque bolts (20) to a torque of 6.8 N·m (60 lb in).

Rotate the center shaft for three revolutions.

Repeat 26 and 27 until the torque on bolts (20) stabilizes.

Repeat steps 23 through 28 for the remaining bearing cages.

Use Tooling (K) in order to measure the gap between the bearing cage (21) and the housing at two places that are 180 degrees from each other. Average the two measurements of the gap and add 0.15 mm (0.006 inch) to the result. This value equals the required thickness for the shims.

Repeat Step 30 for the other remaining cages.

Remove the bolts and the bearing cages.

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Illustration 15	g02596256

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Illustration 16	g01355696

Install shims (24) and spacer (23A) . Install D-ring seal (23) onto bearing cage (21) . Use Tooling (C) to install lip seal (22) into bearing cage (21) . Install bearing cage (21) . Install bolts (20) . Tighten bolts (20) to a torque of 60 ± 12 N·m (44 ± 9 lb ft).

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Illustration 17	g02596196

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Illustration 18	g01355616

Install shims (18) . Install O-ring seals (17) onto bearing cage (16) . Install bearing cage (16) . Install bolts (15) . Tighten bolts (15) to a torque of 60 ± 12 N·m (44 ± 9 lb ft).

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Illustration 19	g01355465

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Illustration 20	g02596436

Install shims (12) . Install O-ring seal (11) onto bearing cage (10) . Install bearing cage (10) . Install bolts (9) . Tighten bolts (9) to a torque of 60 ± 12 N·m (44 ± 9 lb ft)

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Illustration 21	g02596357

Use Tooling (J) in order to check the end play. The end play should be between 0.05 + 0.05 - 0.012 mm (0.002 + 0.002 - 0.0005 inch). Add or remove shims as shims are required.