TURBOCHARGER GP 4W1495 - Caterpillar

Illustration 1 g00735073
The rotation of the shaft is counterclockwise when the pump is viewed from the drive end.Note: For the testing of the pump capacity, use SAE 10W oil that is at a temperature of 65° C (150° F).Apply the following pressure to the pilot port. ... 1600 kPa (230 psi)Note: The following specifications are for a bench test. The specifications for a pump that is tested on the machine may be different.Test at full speed Output ... 230 4 L/min (61 1 US gpm) Pressure ... 6900 kPa (1000 psi) Pump RPM ... 1900 Engine RPM ... 1900 (1) Pump Control ValveFor information on the pressure and flow compensator valve, refer to Specifications, "Pump Control Valve". (2) Torque for four bolts ... 430 N m (320 lb ft)Note: Recheck dimension (E) when you replace any of the following components: the housing, a rod and the piston. Use one of the adjustment rods (3) to obtain dimension (E) of 0.20 0.10 mm (0.008 0.004 inch). (3) Three different adjustment rods 117-5923 Rod ... 119.3 mm (4.70 inch) 117-5924 Rod ... 119.1 mm (4.69 inch) 117-5925 Rod ... 119.5 mm (4.71 inch) (4) 117-5926 Spring Test force ... 29.0 4.0 N (6.52 0.91 lb) Length under test force ... 45.0 mm (1.77 inch) Free length after test ... 62.0 mm (2.44 inch) Outside diameter ... 20.2 mm (0.80 inch)Use shims (5) to achieve dimension (F) of 137.05 0.10 mm (5.396 0.004 inch). (5) Four different shimsThickness 6E-0720 Shim ... 1.80 mm (0.071 inch) 6E-0721 Shim ... 0.90 mm (0.035 inch) 6E-0722 Shim ... 1.30 mm (0.051 inch) 6E-0723 Shim ... 0.90 mm (0.035 inch) (6) Torque for the orifice ... 6.5 0.2 N m (58 2 lb in) (7) Torque for the orifice ... 6.5 0.2 N m (58 2 lb in) Use one of the adjustment rods (8) to obtain dimension (G) of 47.60 0.10 mm (1.874 0.004 inch). (8) Four different adjustment rods 117-5917 Rod ... 129.6 mm (5.10 inch) 146-6555 Rod ... 129.8 mm (5.11 inch) 146-6554 Rod ... 129.4 mm (5.09 inch) 178-2844 Rod ... 130.0 mm (5.12 inch) (9) 117-5920 Spring Free length ... 86.4 mm (3.40 inch) Outside diameter ... 25.0 mm (0.98 inch) 216-0827 Pump Control Valve
Illustration 2 g00749371
(1) Setscrew Pressure setting ... 36200 kPa (5250 psi) One rotation of the setscrew changes the pressure. ... 27600 kPa (4000 psi) (2) 6E-3855 Spring Length under test force ... 13.6 mm (0.54 inch) Test force ... 90 13 N (21 3 lb) Free length after test ... 17.1 mm (0.67 inch) Outside diameter ... 8.6 mm (0.34 inch) (3) 150-8320 Spring Length under test force ... 17.6 mm (0.69 inch) Test force ... 300 45 N (68 10 lb) Free length after test ... 19.2 mm (0.76 inch) Outside diameter ... 14.6 mm (0.57 inch) (4) 170-9822 Spring Free length after test