D350E Series II Articulated Truck Caterpillar

Piston Pump (Brake) - Disassemble

Usage:

Disassembly Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
(A)	1P-0510	Driver Group	1
(B)	9S-9152	Bearing Puller	1
(C)	1P-1854	Retaining Ring Pliers	1

Start By:

Remove the pump. Refer to Disassembly and Assembly, "Pump Group Piston (Brake) - Remove ".

Note: The weight of the pump is 21 kg (45 lb).

Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.

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NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, PERJ1017, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat^® products. Dispose of all fluids according to local regulations and mandates.

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Illustration 1	g00659341

Remove four bolts (2) and valve (3) from pump housing (1).
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Illustration 2 g00659347
Remove O-ring seals (4) from valve (3).
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Illustration 3 g00659348
Remove plug (5) from valve assembly (3).
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Illustration 4 g00659350
Remove stem (6), spring retainer (7), spring (8) and spring (9) from valve (3) and from plug (5).
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Illustration 5 g00659351
Disassemble plug (5), as follows:
1. Remove seal (10) and seat (11) from plug (5).
2. Remove cap (16) and seal (15) from adjuster screw (14).
3. Remove adjuster screw (14), nut (13), and seal (12) from plug (5).
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Illustration 6 g00659352
Remove plug (17) from valve (3).
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Illustration 7 g00659353
Remove stem (18), spring retainer (19), springs (20) and (21), and seat (22) from valve (3) and from plug (17).
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Illustration 8 g00659354
Disassemble plug (17), as follows:
1. Remove O-ring seal (23) from plug (17).
2. Remove cap (28) and seal (27) from adjuster screw (26).
3. Remove adjuster screw (26), nut (25), and seal (24) from plug (17).
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Illustration 9 g00659356
Remove orifice (29) from valve (3).
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Illustration 10 g00659358
Remove seal (30) from orifice (29) and from valve (3).
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Illustration 11 g00659362

Note: Light spring pressure is present beneath the head assembly.
Carefully remove bolts (31) from head assembly (32) and from pump housing (1).
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Illustration 12 g00659363
Carefully remove head assembly (32) from pump housing (1).
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Illustration 13 g00659364
Remove O-ring seals (33) and plate (34) from head assembly (32).
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Illustration 14 g00659365

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Illustration 15 g00659370
Remove cap (35), seal (36), locknut (37), and adjuster screw (38) from head assembly (32).
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Illustration 16 g00659374
Remove cylinder (39) and piston (40) from head assembly (32).
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Illustration 17 g00659375
Remove bearing cup (41) from head assembly (32).
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Illustration 18 g00659376
Remove plunger assembly (42) and guide (43) from pump housing assembly (1).
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Illustration 19 g00659381
Remove spring (44) from plunger (42).
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Illustration 20 g00659383
Remove O-ring seal (45) and bearing cone (46) from pump housing assembly (1).
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Illustration 21 g00659386
Remove adjustment spacer (47) from the shaft and from pump housing assembly (1).
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Illustration 22 g00659387
Carefully remove the entire rotating group (48) from pump housing assembly (1).
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Illustration 23 g00659390
Position rotating group (48) on blocks, as shown.
Remove shaft assembly (49) from the rotating group.
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Illustration 24 g00659391
Use Tooling (B) and a press to remove bearing cone (50) from shaft (49).
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Illustration 25 g00659393
Remove swashplate (51) from the rotating group.
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Illustration 26 g00659394
Remove plate assembly (52) from the rotating group.
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Illustration 27 g00659395

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Illustration 28 g00659396
Remove piston assemblies (53) from plate (52).
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Illustration 29 g00661130
Remove bearing (54) from barrel assembly (55).
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Illustration 30 g00659397
Turn barrel assembly (55) upright and position the barrel assembly in a press.
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Illustration 31 g00659398

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Illustration 32 g00659400
Use Tooling (A) and tooling (C) to compress and reposition the hidden spring and retaining ring (56) in barrel assembly (55).
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Illustration 33 g00659406
Remove retaining ring (56), spring (59), spacer (58) and pins (57) from barrel (55).
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Illustration 34 g00659407
Remove bearings (60) from pump housing (1).
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Illustration 35 g00659408
Remove retaining ring (61) from pump housing (1).
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Illustration 36 g00659410
Use Tooling (A) to remove seal (62) from pump housing (1).
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Illustration 37 g00659412
Remove bearing cone (63) from pump housing (1).