SPECIAL AR 3157510 - Caterpillar

Illustration 1 g01441108
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Type ... Load sensing variable displacement piston pumpRotation ... Counterclockwise when you view the piston pump group from the shaft end. (1) 4T-1916 Spring Length under test force ... 42.06 mm (1.656 inch) Test force ... 65.0 6.5 N (14.6 1.5 lb) Free length after test ... 54.1 mm (2.13 inch) Outside diameter ... 18.42 mm (0.725 inch) (2) Torque for the four screws ... 23 2 N m (17 1 lb ft) (3) Torque for the four bolts ... 38 4 N m (28 3 lb ft) 4T-1909 Pump Control Valve Gp
Illustration 3 g02549757
(7) Pressure setting for 4T-1909 Pump Control Valve Gp ... 16000 345 kPa (2320 50 psi) (8) Torque for 6F-0612 Jam Nut ... 9 1 N m (79.65675 8.85075 lb in)Specifications for a Bench Test
For the test, use SAE 10W oil that is at 43 to 49 °C (109 to 120 °F).Test at full speed: Output ... 40 L/min (11 US gpm) Pressure ... 690 kPa (100 psi) Pump speed ... 2200 rpm Engine speed ... 1750 rpm Output ... 38 L/min (10 US gpm) Pressure ... 6900 kPa (1000 psi) Pump speed ... 2200 rpm Engine speed ... 1750 rpmTest at half speed: Output ... 20 L/min (5.3 US gpm) Pressure ... 690 kPa (100 psi) Pump speed ... 1100 rpm Engine speed ... 875 rpm Output ... 19 L/min (5 US gpm) Pressure ... 6900 kPa (1000 psi) Pump speed ... 1100 rpm Engine speed ... 875 rpmSpecifications for a Machine Test
For the test, use SAE 10W oil that is at 43 to 49 °C (109 to 120 °F).Test at full speed: Output ... 35 L/min (9.2 US gpm) Pressure ... 690 kPa (100 psi) Pump speed ... 1883 rpm Engine speed ... 1750 rpm Output ... 34 L/min (9 US gpm) Pressure ... 6900 kPa (1000 psi) Pump speed ... 1883 rpm Engine speed ... 1750 rpmTest at half speed: Output ... 17.5 L/min (4.6 US gpm) Pressure ... 690 kPa (100 psi) Pump speed ... 942 rpm Engine speed ... 875 rpm Output ... 17 L/min (4.5 US gpm) Pressure ... 6900 kPa (1000 psi) Pump speed ... 942 rpm Engine speed ... 875 rpmPressure Compensator Valve (Brake)
Illustration 4 g01441111
Pressure setting for the pressure compensator ... 16000 345 kPa (2321 50 psi) (4) 3G-5423 Spring Length under test force ... 34.11 mm (1.343 inch) Test force ... 555 60 N (125 13 lb) Free length after test ... 39.80 mm (1.567 inch) Outside diameter ... 16.08 mm (0.633 inch)Note: When you tighten jam nut (5), hold hex socket setscrew (6) . (5) Torque for the jam nut ... 9 1 N m (80 9 lb in)