R1700 Load Haul Dump Power Train, Steering, Braking, Hydraulic, and Machine Systems Caterpillar

Components of the Power Train System

• Torque Converter

• Torque Converter Housing

• Transmission

• Output Transfer Gears

• Axles

• Transmission Oil Pump

• Transmission Oil Filter

• Torque Converter Lockup Clutch Modulating Valve

• Torque Converter Outlet Relief Valve

• Modulating Valves

• Magnetic Screen

• Transmission Oil Cooler

Power Train

Illustration 1	g06126584

Torque Converter

Illustration 2	g06126586
Torque converter The torque converter is located between the engine and the transmission housed in the case (input) (gears).

Torque Converter Housing

Illustration 3	g06208774
Case (input) (gears) The torque converter updrive housing is fastened to the engine flywheel housing. The case houses the torque converter which contains two gear sets. One gear set drives the steering, implement, transmission, hydraulic fan, air condition and, brake, pilot, secondary fan pumps. The second gear set drives the output shaft and yoke, which then drives the transmission.

Transmission

Illustration 4	g06126580
Transmission Transmission containing clutches and planetary are located below and rearward of the cab between the input case and output case gear housings.

Output Transfer Gears

Illustration 5	g06127034
Output transfer gears The output transfer gear is attached to the transmission. The output gear case houses gearing that transfers power from the transmission to output shaft.

Axles

Illustration 6	g06127038
Oscillating rear axle Oscillating Rear axle located under engine and transmission and attached to machine frame.

Illustration 7	g06127036
Front axle Front axle located under loader arms and attached to machine frame.

Transmission Oil Pump

Illustration 8	g06127026
Transmission oil pump Oil pump for the transmission is attached to the main fan pump.

Transmission Oil Filter

Illustration 9	g06127031
Transmission oil filter The oil filter for the transmission is on the left side of the machine in the transmission compartment.

Torque Converter Lockup Clutch Modulating Valve

Illustration 10	g06209246
Torque converter lockup clutch modulating valve The modulating valve for the torque converter lockup clutch is on the front left side of the updrive housing.

Torque Converter Outlet Relief Valve

Illustration 11	g06209248
Torque converter outlet relief valve The torque converter outlet relief valve is on the front right side of the updrive housing.

Modulating Valves

Illustration 12	g06126582

The location for the six modulating valves is on the upper left side of the transmission. Four modulating valves are for speed control. Two modulating valves are for direction control.

Magnetic Screen

Illustration 13	g06127030
Magnetic screen

The magnetic screen for the transmission oil is on the lower left side of the output transfer gears.

Cooler (transmission oil)

Illustration 14	g06127052
Oil cooler The transmission oil cooler is on the left side of the machine.