994K Wheel Loader Systems Caterpillar

Piston Pump (Implement)

Usage:

994K MM9

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Illustration 1	g06250254

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Table 1
Item	Qty	Part	Specification Description
1	6	095-0706 Bolt	Torque to 270 ± 40 N·m (199 ± 30 lb ft).
2	5	8T-0267 Bolt	Before assembly, apply Loctite 243 to threads.
3	1	214-6489 Ball	Lubricate sliding surfaces lightly with hydraulic oil.
4	2	6V-5686 Bolt	Torque to 270 ± 40 N·m (199 ± 30 lb ft).
5	1	148-3548 Special Race Bearing	Lubricate sliding surfaces lightly with hydraulic oil.
6	1	187-9116 Pump Barrel As	Lubricate sliding surfaces lightly with hydraulic oil.
7	9	120-7508 Bushing	Ensure that all surfaces of bearing must be clean. Bore after assembly is 30.956 ± 0.005 mm (1.2187 ± 0.0002 inch). Installation depth is 0.0 to 1.0 mm (0.00 to 0.04 inch).
8	4	9S-4181 Plug	Torque to 90 ± 15 N·m (66 ± 11 lb ft).
9	9	150-4355 Piston	Lubricate sliding surfaces lightly with hydraulic oil.
10	1	250-3462 Special Roller Bearing	Lubricate sliding surfaces lightly with hydraulic oil.
11	1	159-7320 Retainer Plate	Lubricate sliding surfaces lightly with hydraulic oil.
12	1	314-3243 Swashplate	Lubricate sliding surfaces lightly with hydraulic oil.
13	3	5A-3604 Bolt	Before assembly, apply Loctite 243 to threads.

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Illustration 2	g06250437
Section C-C

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Table 2
Item	Qty	Part	Specification Description
14	1	251-7828 Port Plate	Lubricate sliding surfaces lightly with hydraulic oil.

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Illustration 3	g06250451
Section D-D

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Table 3
Item	Qty	Part	Specification Description
15	1	265-8956 Pump Housing Assembly	Bore must be free of oil, grease, and chips. Install 124-1555 Plug with ball facing out. Ensure that top of sleeve is not above surface of housing. Press ball into sleeve until ball is below the edge of sleeve 0.4 ± 0.2 mm (0.02 ± 0.01 inch).
16	1	158-3504 Control Spool	Lubricate sliding surfaces lightly with hydraulic oil.
17	1	270-7898 Spring	Length under test force is 46.95 mm (1.848 inch). Test force is 27.22 ± 0.63 N (6.12 ± 0.14 lb). Free length after test is 57.22 mm (2.253 inch).
18	1	267-3741 Actuator	Lubricate sliding surfaces lightly with hydraulic oil.
19	1	7Y-4224 Orifice	Do not apply sealant. Torque to 10 ± 2 N·m (89 ± 18 lb in).
20	1	214-2445 Spring	Length under test force is 40 mm (1.6 inch). Test force is 940 ± 100 N (211 ± 22 lb). Free length after test is 43.04 mm (1.694 inch).
21	1	316-1438 Cartridge As	Torque to 35 ± 3 N·m (26 ± 2 lb ft).
22	1	198-2914 Nut	Torque to 20 ± 3 N·m (177 ± 27 lb in).
23	4	162-2165 Bolt	Torque to 2.20 ± 0.25 N·m (19.47 ± 2.21 lb in).
24	1	177-1405 Spring	Length under test force is 8.20 mm (0.323 inch). Test force is 18.41 ± 0.55 N (4.14 ± 0.12 lb). Free length after test is 12.29 mm (0.484 inch).
25	1	6J-2680 O-Ring Seal	Lubricate O-ring seal lightly with the lubricant that is being sealed.
26	1	322-2018 Actuator Slide	Lubricate sliding surfaces lightly with hydraulic oil.

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