TK370 Wheel Feller Buncher, TK380 Wheel Feller Buncher, TK371 Industrial Tractor and TK381 Industrial Tractor Power Train Caterpillar

Illustration 1	g01083592
250-3823 Combination Valve (Pilot, Brake, and Steering) (1) Priority relief valve (2) Pilot check valve (3) Pressure reducing valve (brake) (4) Pilot pressure reducing valve (5) Brake check valve (6) 197-7400 Solenoid Valve (CREEP MODE) (7) Relief valve (8) 197-7400 Solenoid Valve Gp (PARKING BRAKE) (9) Shuttle valve (10) 171-3685 Solenoid Valve Gp (BRAKE CHARGING) (11) 197-7400 Solenoid Valve Gp (PILOT LOCKOUT) (12) Control valve (steering) (13) Control valve (winch) (14) 197-7400 Solenoid Valve Gp (FRONT DIFFERENTIAL) (15) 197-7400 Solenoid Valve Gp (REAR DIFFERENTIAL)

(1) Flow control valve

Torque for the 227-0161 Flow Control Valve ... 54 N·m (40 lb ft)

Pressure differential ... 690 kPa (100 psi)

Maximum operating pressure ... 20700 kPa (3000 psi)

Flow rating ... 190 L/min (50 US gpm)

(2) Pilot check valve

Torque for the 220-1374 Pilot Check Valve ... 31 N·m (275 lb in)

Cracking pressure ... 30 kPa (5 psi)

Maximum flow ... 38 L/min (10 US gpm)

(3) Pressure reducing valve (brake)

Torque for the pressure reducing valve ... 65 N·m (48 lb ft)

Pressure setting at 11.3 L/min (3 US gpm) ... 20685 kPa (3000 psi)

(4) Pilot pressure reducing valve

Torque for the pressure reducing valve ... 47 ± 6 N·m (35 ± 5 lb ft)

Operating pressure range ... 34500 kPa (5000 psi)

Regulating pressure range ... 2590 ± 76 kPa (375 ± 11 psi)

Flow rating ... 57 L/min (15 US gpm)

Pressure setting at 11.3 L/min (3 US gpm) ... 2585 kPa (375 psi)

(5) Brake check valve

Cracking pressure ... 170 kPa (25 psi)

Maximum flow ... 10 L/min (2.75 US gpm)

Maximum inlet pressure ... 21000 kPa (3000 psi)

(7) Relief valve

Torque for the 219-5883 Relief Valve ... 65 N·m (48 lb ft)

Pressure setting at 10 L/min (2.7 US gpm) ... 28000 kPa (4060 psi)

Maximum flow ... 56.3 L/min (15 US gpm)

Maximum inlet pressure ... 38000 kPa (5500 psi)

Maximum pressure setting ... 34500 kPa (5000 psi)

(9) Shuttle valve

Torque for the 220-1372 Shuttle Valve ... 65 N·m (575 lb in)

Maximum flow ... 37.5 L/min (10 US gpm)

Maximum inlet pressure ... 34500 kPa (5000 psi)

197-7400 Solenoid Valve Gp

Illustration 2	g01083670

Five 197-7400 Solenoid Valves are used on the 250-3823 Combination Valve (Pilot, Brake, and Steering). The five solenoid valves control the following functions:

• Creeper mode

• Parking brake

• Pilot supply

• Front differential lock

• Rear differential lock

See Illustration 1 for locations of the solenoid valves.

(16) Torque for the locknut ... 9.5 ± 1.5 N·m (85 ± 13 lb in)

Final installation torque ... 50 ± 5 N·m (37 ± 4 lb ft)

Pressure ratings

Nominal pressure ... 20700 kPa (3000 psi)

Maximum pressure ... 24138 kPa (3500 psi)

Coil

Nominal voltage ... 24 VDC

Coil resistance at 25 ± 5°C (77 ± 9°F) ... 41.9 ± 2.1 ohms

Note: The solenoid valve requires SAE 10 to SAE 30 oil.

171-3685 Solenoid Valve Gp (Brake Charging System)

Illustration 3	g01083673

The 171-3685 Solenoid Valve Gp (Brake Charging System) is used on the 250-3823 Combination Valve (Pilot, Brake, and Steering).

See Illustration 1 for locations of the solenoid valve.

(17) Torque for the locknut ... 9 ± .5 N·m (80 ± 4 lb in)

(18) Final installation torque ... 115 ± 7 N·m (85 ± 5 lb ft)

Pressure ratings

Nominal pressure ... 34500 kPa (5000 psi)

Maximum pressure ... 38000 kPa (5500 psi)

Coil

Nominal voltage ... 24 VDC

Coil resistance at 25 ± 5°C (77 ± 9°F) ... 32.6 ± 1 ohms

219-6467 Control Valve (Steering)

Illustration 4	g01083679

(19) Torque for the 219-6498 Valve ... 15 N·m (130 lb in)

(20) Torque for the three screws ... 10 N·m (90 lb in)

(21) Apply 5P-3413 Pipe Sealant to the threads prior to tightening. Torque for the two 171-4370 Orifices ... 3 N·m (26 lb in)

(22) Torque for the three screws ... 10 N·m (90 lb in)

(23) Apply 5P-3413 Pipe Sealant to the threads prior to tightening. Torque for the 219-6497 Spring ... 10 N·m (90 lb in)

Control Valve Winch

Illustration 5	g01086650

(24) Torque for the four bolts ... 3 N·m (26 lb in)

(25) Torque for the 219-6498 Valve ... 15 N·m (130 lb in)

(26) Torque for the three screws ... 10 N·m (90 lb in)

(27) Torque for the plug ... 30 N·m (20 lb ft)

(28) Torque for the three screws ... 10 N·m (90 lb in)

(29) Apply 5P-3413 Pipe Sealant to the threads prior to tightening. Torque for the 219-6497 Spring ... 10 N·m (90 lb in)

(30) Torque for the plug ... 15 N·m (130 lb in)