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| Illustration 1 | g01244589 |
(1) Finger Tip Control (5) Service Brake Pedals (6) Decelerator Pedal (7) High/Low Idle Switch (8) Power Train Oil Filler (9) Power Train Oil Dipstick (11) Power Train Oil Pump (16) Priority Valve (17) Torque Divider (18) Torque Converter Outlet Relief Valve (19) Torque Converter Inlet Relief Valve (20) Lubrication Distribution Manifold (22) Power Train Oil Cooler (24) Transmission (25) Transfer and Bevel Gear Case (26) Transmission Hydraulic Control (30) Service Brakes (32) Final Drive (34) Brake Control Valve (36) PTO Charge Filter | |
Operator Controls
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| Illustration 2 | g01241841 |
(1) Steering Clutch and Brake Levers (2) Parking Brake Switch (3) Transmission Upshift Switch (4) Transmission Downshift Switch (5) Position Sensor | |
The finger tip control is located on the left console in the cab. The operator uses the two steering clutch and brake levers (1) to steer the machine. The lever on the left controls the left steering clutch and brake. The lever on the right controls the right steering clutch and brake.
The position sensor (5) changes the direction of the machine. Press the top of the position sensor (5) in order to move the tractor in the forward direction. Press the bottom of the position sensor (5) in order to move the machine in the reverse direction.
Transmission upshift switch (3) is used to upshift the transmission. Transmission downshift switch (4) is used to downshift the transmission. Each push of the button causes the transmission to shift by one gear. The machine is equipped with three speeds FORWARD and three speeds REVERSE.
Parking brake switch (2) de-energizes the parking brake solenoid. This engages both of the brakes in order to prevent the machine from moving. This switch is located to the left of steering control lever (1). When the parking brake is engaged, the parking brake indicator on the dashboard will light.
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| Illustration 3 | g01242013 |
(6) Service Brake Pedals (7) Decelerator Pedal | |
The service brake pedal (6) controls the braking of the machine. Partially depressing the pedal will result in a light operation of the brakes as the brakes begin to engage. When the pedal is depressed completely, full braking action will be applied. The service brake pedal is on the left near the floor of the operator station.
Decelerator pedal (7) allows the operator to decrease the engine speed during machine operation. The decelerator pedal is the pedal on the right near the floor of the operator station.
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| Illustration 4 | g01242022 |
(8) High/Low Idle Switch | |
high/low idle switch (8) is located on the right console of the operator station. The high/low idle switch allows the operator to select either high idle or low idle engine speed.
Power Train Oil Filler
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| Illustration 5 | g01242027 |
(9) Power Train Oil Filler (10) Power Train Oil Dipstick | |
Power train oil filler (9) is located in the front compartment on the left fender. This location is just ahead of the hydraulic oil tank. Power train oil is added to the system through the power train oil filler.
Power train oil dipstick (10) is used to check the level of power train oil in the system.
Power Train Oil Pump
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| Illustration 6 | g01258188 |
(11) Power Train Oil Pump (12) Transmission and Torque Converter Scavenge Section "C" (13) Steering Clutch and Brake Lube Section "B" (14) Transmission Charging Section "A" (15) Gear Hub | |
Power train oil pump (11) is mounted to the right front of the main case. The power train oil pump is driven by gear hub (15). Gear hub (15) is connected to a shaft that is driven by a similar gear from the flywheel. The pump is a three-section gear pump which provides oil for the following functions: braking, transmission control, torque converter operation and lubrication.
Torque Divider (Torque Converter)
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| Illustration 7 | g01242062 |
(17) Torque Divider (18) Torque Converter Outlet Relief Valve | |
Torque divider (17) is located behind the engine between the flywheel housing and the main drive shaft. The torque divider connects the engine to the planetary transmission. The connection is both a hydraulic connection and a mechanical connection. The hydraulic connection is through a torque converter. The mechanical connection is through a planetary gear set. During operation, the torque converter multiplies torque as the load on the machine increases.
Torque converter outlet relief valve (18) is located on the right side of the torque divider housing. The torque converter outlet relief valve maintains a minimum pressure in the torque converter.
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| Illustration 8 | g01107368 |
(19) Torque Converter Inlet Relief Valve (20) Lubrication Distribution Manifold | |
Torque converter inlet relief valve (19) is inside the case behind the lower portion of lubrication distribution manifold (20). Lubrication distribution manifold (20) is located at the left front of the main case. Torque converter inlet relief valve (19) controls the maximum oil pressure to the torque converter. Torque converter inlet relief valve (19) prevents damage to torque converter components when the engine is started and the oil is cold.
Power Train Oil Cooler
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| Illustration 9 | g01107369 |
(21) Power Train Oil Cooler (22) Cooler Inlet (23) Cooler Outlet | |
Power train oil cooler (21) is mounted on the left rear side of the engine. Power train oil that exits the torque converter is cooled by engine coolant that circulates through tubes inside power train oil cooler (21). Then, the oil flows to the lubrication distribution manifold. The manifold sends lubrication oil to the brakes.
Transmission
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| Illustration 10 | g01107370 |
(24) Transmission (25) Transmission and Bevel Gear Case | |
Transmission (24) is located inside the transmission and bevel gear case (25). The transmission transfers power from the engine and the torque converter to the bevel gears. The bevel gears transfer power to the final drives in order to move the tracks. Five hydraulically activated clutches provide three speeds FORWARD and three speeds REVERSE. Speed and direction are electronically selected by the operator.
Transmission Hydraulic Control
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| Illustration 11 | g01107371 |
(24) Transmission (25) Transmission and Bevel Gear Case (26) Transmission Hydraulic Control (27) Main Relief Valve (28) Transmission Modulating Valves | |
Transmission hydraulic control (26) is located on top of transmission (24). Main relief valve (27) is contained in the transmission hydraulic control. The main relief valve regulates the common top pressure that is used by each of the five transmission clutches.
The transmission clutches are activated by five transmission modulating valves (28). The oil supply to each clutch is controlled by a transmission modulating valve. The modulating valve fills the clutch or the valve drains the clutch according to signals from the power train ECM.
Transfer and Bevel Gears
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| Illustration 12 | g01107372 |
(24) Transmission (25) Transmission and Bevel Gear Case (29) Transfer and Bevel Gears | |
Transfer and bevel gears (29) are located inside the transmission and bevel gear case (25). The transfer and bevel gears transfer power from the transmission to the final drives.
Service Brakes
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| Illustration 13 | g01107373 |
(30) Service Brakes (31) Final Drive (32) Tracks (33) Housing | |
Service brakes (30) are used for slowing or stopping the machine. The service brakes are spring-applied brakes and the service brakes are hydraulically released. The service brakes are located within housing (33) behind final drives (31) .
Brake Control Valve
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| Illustration 14 | g01242393 |
(34) Brake Control Valve (35) Main Case | |
Brake control valve (34) is mounted to the top of main case (35). Brake control valve (34) is located below the operator seat and the rear floorplate in the operator compartment. Oil that is metered by the brake control valve is used to control the function of the brakes during machine operation. The brake control valve is operated electrically by the power train ECM, which responds to the operator's movement of the brake pedal or the parking brake switch.
Depressing the service brake pedal reduces the amount of oil to the brake piston. This allows the spring to partially engage the brakes in order to slow the machine speed. Further depression of the service brake pedal will drain oil from the brake piston. As a result, the spring-applied brakes will fully engage.
Final Drive
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| Illustration 15 | g01244637 |
(31) Final Drives (32) Tracks | |
Final drives (31) cause the last speed reduction and the last torque increase in the power train. The final drives transfer power to tracks (32) through the sprockets.
Power Train Oil Filter
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| Illustration 16 | g01244644 |
(36) Power Train Oil Filter | |
The power train oil filter is located above the left fender.
The Power train oil filter (36) is designed to remove debris from the oil in order to prevent damage to the components of the priority valve, torque converter, transmission, and the brakes (brake lubrication).
Pressure Taps and Oil Sampling Port
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| Illustration 17 | g01107379 |
(41) Plug (42) Plug | |
Brake pressure ("B2") for the right brake may be tested by removing plug (41) and installing a pressure tap.
Brake lubrication pressure ("LB2") may be tested by removing plug (42) and installing a pressure tap.
Brake pressure ("B1") and lubrication pressure ("LB1") for the left brake can be tested by removing the plugs for the left brake. The test ports are reversed on the left side.
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| Illustration 18 | g01242516 |
(44) Pressure Tap for Torque Converter Inlet Relief Valve ("M") | |
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| Illustration 19 | g01242532 |
(45) Pressure Tap for Torque Converter Outlet Relief Valve ("N") | |
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| Illustration 20 | g01242393 |
(34) Brake control valve (35) Main case | |
The Brake control valve is located on the top of the case.
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| Illustration 21 | g01242586 |
(46) Left steering clutch (47) Left brake (48) Right brake (49) Right steering clutch | |
The following pressure taps are located on top of the main case:
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| Illustration 22 | g01242644 |
(50) No. 4 Clutch (SECOND SPEED) (51) No. 5 Clutch (FIRST SPEED) (52) No. 3 Clutch (THIRD SPEED) (53) No. 2 Clutch (FORWARD) (54) No. 1 Clutch (REVERSE) | |
All five pressure ports for the transmission clutches are accessible from the rear of the machine.
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| Illustration 23 | g01244666 |
(55) SOS port (56) Pressure tap | |