992G Wheel Loader Electrohydraulic System Pilot Control Actuator Caterpillar

118-5081 Pilot Control Actuator

Illustration 1	g01049998

(1) Torque for the four bolts ... 3 ± 0.25 N·m (27 ± 2.213 lb in)

(2) 118-5086 Spring

Length under test force ... 55 mm (2.2 inch)

Test force ... 438 ± 35 N (98 ± 8 lb)

Free length after test ... 76.2 mm (3.00 inch)

Outside diameter ... 49.2 mm (1.94 inch)

(3) 118-5087 Spring

Length under test force ... 50 mm (1.9 inch)

Test force ... 243 ± 19 N (55 ± 4 lb)

Free length after test ... 63.5 mm (2.50 inch)

Outside diameter ... 35.56 mm (1.400 inch)

(4) 121-2051 Spring

Length under test force ... 46 mm (1.8 inch)

Test force ... 21.0 ± 0.63 N (4.72 ± .142 lb)

Free length after test ... 53.53 mm (2.108 inch)

Outside diameter ... 15.24 mm (.600 inch)

(5) 121-2052 Spring

Length under test force ... 8.0 mm (.32 inch)

Test force ... 17.72 ± 0.53 N (3.984 ± .119 lb)

Free length after test ... 12.7 mm (.50 inch)

Outside diameter ... 10.312 mm (.4060 inch)

179-8248 Pilot Control Actuator and 180-9550 Pilot Control Actuator

Illustration 2	g01049996

(6) Torque at installation ... 35 ± 3 N·m (26 ± 2 lb ft)

Note: Excessive tightening may cause improper operation or failure of the pilot control actuator.

(7) 177-1405 Spring

Free length ... 12.29 mm (0.484 inch)

Outside diameter ... 9.30 mm (0.366 inch)

Assembled length ... 8.20 mm (0.323 inch)

Load at assembly ... 18.41 ± 0.55 N (4.139 ± 0.124 lb)

(8) 177-1403 Spring

Free length ... 53.92 mm (2.123 inch)

Outside diameter ... 15.24 mm (0.600 inch)

Assembled length ... 46.00 mm (1.811 inch)

Load at assembly ... 21.00 ± 0.63 N (4.721 ± 0.142 lb)

(9) 118-5086 Spring

Free length ... 76.2 mm (3 inch)

Outside diameter ... 49.2 mm (1.934 inch)

Assembled length ... 55 mm (2.17 inch)

Load at assembly ... 438 ± 35 N (98.5 ± 7.9 lb)

(10) 118-5087 Spring

Free length ... 63.5 mm (2.50 inch)

Outside diameter ... 35.56 mm (1.400 inch)

Assembled length ... 50 mm (1.97 inch)

Load at assembly ... 243 ± 19 N (54.63 ± 4.27 lb)

148-2350 Coil

Nominal voltage ... 24 VDC

Current draw at 100 °C (212°F) winding temperature ... 1.9 Amperes

Coil resistance at 25°C (75°F) ... 5.0 ± .3 Ohms

Minimum temperature ... −40 °C (−40 °F)

Maximum temperature ... 100 °C (212 °F)