14H and 16H Motor Graders Hydraulic and Steering System Piston Pump (Hydraulic and Steering) Caterpillar


Piston Pump (Hydraulic and Steering)
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View D-D

The rotation of the shaft is counterclockwise when the rotation of the shaft is viewed from the drive end.

Type of pump: Variable Piston

For the test, use SAE 10W oil that is at 65°C (150°F).

Test at full speed:

Output ... 254 L/min (67 US gpm)
Pressure ... 690 kPa (100 psi)
Pump speed ... 2200 rpm
Engine speed ... 2200 rpm
Output ... 242 L/min (64 US gpm)
Pressure ... 6900 kPa (1000 psi)
Pump speed ... 2200 rpm
Engine speed ... 2200 rpm

Test at half speed:

Output ... 127 L/min (34 US gpm)
Pressure ... 690 kPa (100 psi)
Pump speed ... 1100 rpm
Engine speed ... 1100 rpm
Output ... 121 L/min (32 US gpm)
Pressure ... 6900 kPa (1000 psi)
Pump speed ... 1100 rpm
Engine speed ... 1100 rpm

(AA) Port for case drain

(FF) Pump inlet port

(1) Torque for four bolts ... 115 ± 12 N·m (85 ± 9 lb ft)

(2) Torque for two bolts ... 286 ± 29 N·m (210 ± 21 lb ft)

(3) Pressure and flow compensator valve

(4) Torque for four bolts ... 34 ± 3 N·m (25 ± 2 lb ft)

(5) Torque for rods ... 79 ± 4 N·m (58 ± 3 lb ft)

Note: Apply 9S-3263 Thread Lock to the threads of the rods prior to installation.

(6) 6E-4214 Bias Spring

Test length ... 127 mm (5 inch)
Test force ... 200 ± 20 N (45 ± 5 lb)
Free length after test ... 133.0 mm (5.24 inch)
Outside diameter ... 43.5 mm (1.71 inch)

(7) 6E-4216 Pump Rotating Group

(8) Torque for two plugs ... 12.85 ± 0.15 N·m (114.000 ± 1.000 lb in)

(9) To achieve 0.010 to 0.100 mm (.0004 to .0039 inch) axial shaft end play, use 103-6282 Shim Pack, as required.

103-6282 Shim Pack

Quantity ... 17
Outside diameter ... 46.25 mm (1.821 inch)
Inside diameter ... 35.12 mm (1.383 inch)

(10) Torque for plug ... 101.5 ± 4.5 N·m (75.00 ± 3.00 lb ft)

(GG) Load sensing signal port

(11) 9T-1699 Spring

Test length ... 11.1 mm (.44 inch)
Test force ... 33 ± 3 N (7.0 ± .7 lb)
Free length after test ... 17.0 mm (.67 inch)
Outside diameter ... 25.0 mm (.98 inch)

(12) Torque for two screws ... 4.0 ± 0.4 N·m (35.00 ± 4.00 lb in)

(13) Torque for three bolts ... 8.5 ± 1.0 N·m (75.00 ± 9.00 lb in)

(14) Torque for plug ... 102 ± 5 N·m (75 ± 4 lb ft)

(HH) Optional drain port




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6E-4216 Pump Rotating Group (7)

(15) Torque for four bolts ... 34 ± 3 N·m (25 ± 2 lb ft)

Note: Apply 9S-3263 Thread Lock to the threads of the bolts prior to installation.

(16) 9T-8446 Spring

Test length ... 63.7 mm (2.51 inch)
Test force ... 1120 ± 60 N (252 ± 14 lb)
Free length after test ... 122.0 mm (4.80 inch)
Outside diameter ... 58.4 mm (2.30 inch)

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