992K Wheel Loader Electrohydraulic System Caterpillar

Illustration 1	g01444094

Maximum variable pump displacement per revolution ... 250 cc (15.3 in³)

Maximum speed at maximum displacement and maximum pressure ... 250 rpm

Maximum pressure at maximum displacement and maximum speed ... 32000 kPa (4650 psi)

Flow at maximum speed and maximum displacement ... 513 L/min (136 US gpm)

Rotation ... Clockwise

(1) Torque for the eight bolts ... 270 ± 40 N·m (200 ± 30 lb ft)

(2) Apply 4C-4030 Thread Lock Compound to the threads of the five bolts.

(3) Lubricate the rolling and sliding surfaces of the bearing lightly with clean hydraulic oil.

(4) Lubricate the rolling and sliding surfaces of the roller bearing race lightly with clean hydraulic oil.

(5) Lubricate the rolling and sliding surfaces of the pump barrel assembly lightly with clean hydraulic oil.

(6) Torque for the four O-ring plugs ... 90 ± 15 N·m (65 ± 11 lb ft)

(7) Lubricate the rolling and sliding surfaces of the nine pistons lightly with clean hydraulic oil.

(8) Lubricate the rolling and sliding surfaces of the retainer plate lightly with clean hydraulic oil.

(9) Lubricate the rolling and sliding surfaces of the swashplate lightly with clean hydraulic oil.

(10) Lubricate the rolling and sliding surfaces of the special race bearing lightly with clean hydraulic oil. Assemble the snap ring of the bearing toward the shaft flange.

(11) Lubricate the rolling and sliding surfaces of the retainer assembly lightly with clean hydraulic oil.

(12) Lubricate the lip seals lightly with the lubricant that is being sealed.

(13) Apply 4C-4030 Thread Lock Compound to the threads of the three bolts.

Illustration 2	g01429524
View of area D

(14) 110-3978 Wave Spring

Length under test force ... 10.0 mm (0.39 inch)

Test force ... 3780 N (850 lb)

Free length after test ... 14.15 mm (0.557 inch)

Outside diameter ... 81.84 ± 0.38 mm (3.222 ± 0.015 inch)

(15) 142-0149 Spacer

Quantity ... 1

Thickness of the spacer ... 1.07 ± 0.05 mm (0.042 ± 0.002 inch)

(16) Lubricate the rolling and sliding surfaces of the ball lightly with clean hydraulic oil.

Illustration 3	g01444096
Section B-B

(17) Lubricate the rolling and sliding surfaces of the port plate lightly with clean hydraulic oil.

Illustration 4	g01429528
Section C-C

(18) 214-2445 Spring

Length under test force ... 40 mm (1.6 inch)

Test force ... 940 ± 100 N (211 ± 22 lb)

Free length after test ... 43.04 mm (1.694 inch)

Outside diameter ... 48.4 mm (1.91 inch)

Note: Do not apply sealant to the threads of the orifice (19) .

(19) Torque for the orifice ... 10 ± 2 N·m (90 ± 18 lb in)

(20) Lubricate the rolling and sliding surfaces of the actuator lightly with clean hydraulic oil.

(21) Lubricate the rolling and sliding surfaces of the actuator slide lightly with clean hydraulic oil.

(22) 270-7898 Spring

Length under test force ... 46.95 mm (1.848 inch)

Test force ... 27.22 ± 0.63 N (6.1 ± 0.1 lb)

Free length after test ... 57.22 mm (2.253 inch)

Outside diameter ... 15.24 mm (0.600 inch)

(23) Lubricate the rolling and sliding surfaces of the control spool lightly with clean hydraulic oil.

(24) Torque for the four bolts ... 2.20 ± 0.25 N·m (19 ± 2 lb in)

(25) Torque for the cartridge assembly ... 35 ± 3 N·m (26 ± 2 lb ft)

(26) 177-1405 Spring

Length under test force ... 8.20 mm (0.323 inch)

Test force ... 18.41 ± 0.55 N (4.1 ± 0.1 lb)

Free length after test ... 12.29 mm (0.484 inch)

Outside diameter ... 9.30 mm (0.366 inch)

(27) Lubricate the O-ring seal lightly with the lubricant that is being sealed.

Illustration 5	g01429529
View E-E

(28) During assembly of the retainer assembly, align the ports of the retainer assembly with the ports of the pump body, as shown.