784B and 785B Off-Highway Truck Hydraulic System Caterpillar


Hydraulic System Schematic

Usage:

785B 6HK



Illustration 1g00304050

(1) Left rear wheel brake

(2) Air breathers

(3) Left front wheel brake

(4) Torque converter lockup clutch and synchronizing valve

(5) Makeup tank for brake oil

(6) Torque converter and front brake cooling oil cooler

(7) Torque converter

(8) Torque converter outlet relief valve

(9) Pump drive

(10) Transmission hydraulic control

(11) Torque converter and parking brake release gear pump

(12) Transmission oil cooler

(13) Transmission planetary

(14) Transmission cooler inlet relief valve

(15) Torque converter inlet relief valve

(16) Electric drive pump check valve

(17) Parking and secondary brake release electric drive pump

(18) Parking and secondary brake valve

(19) Torque converter and front brake cooling diverter valve

(20) Brake master cylinder (front)

(21) Brake master cylinders (rear)

(22) Transmission gear pump

(23) Rear slack adjuster

(24) Traction control valve

(25) Rear brake oil cooler relief valve

(26) Hoist control valve

(27) Front slack adjuster

(28) Right rear wheel brake

(29) Rear brake oil coolers

(30) Hoist counterbalance valve

(31) Hoist cylinders

(32) Hoist diverter valve

(33) Hoist and rear brake cooling gear pump

(34) Torque converter, hoist, brake, and transmission hydraulic tank

(35) Right front wheel brake

(47) Parking brake release pump section

(48) Torque converter charging pump section

(49) Torque converter scavenge pump section

(50) Transmission charging pump section

(51) Transmission lubrication pump section

(52) Transmission scavenge pump section

(53) Rear brake cooling pump section

(54) Hoist pump section

Caterpillar Information System:

768C, 769C, 769D, 772B, 773B, 773D, 776C, 777B, 777D, 784B, 785, 785B, 789, 789B, 793, 793B and 793C Off-Highway Truck/Tractors and 771C, 771D and 775D Quarry Trucks Automatic Retarder Control (ARC) System Pressure Switch (Retarder)
768C, 769C, 769D, 772B, 773B, 773D, 776C, 777B, 777D, 784B, 785, 785B, 789, 789B, 793, 793B and 793C Off-Highway Truck/Tractors and 771C, 771D and 775D Quarry Trucks Automatic Retarder Control (ARC) System Solenoid Valve (Pressure Control)
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740 Articulated Truck, 768C, 769C, 769D, 772B, 773B, 773D, 773E, 773F, 776, 776B, 776C, 776D, 777, 777B, 777C, 777D, 777F, 784B, 784C, 785, 785B, 785C, 785D, 789, 789B, 789C, 789D, 793, 793B, 793C and 793D Off-Highway Trucks and 771C, 771D, 775B, 775 Speed Sensor
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