950H Wheel Loader, 962H Wheel Loader and IT62H Integrated Toolcarrier Electrohydraulic System Caterpillar

Illustration 1	g01167392
254-4109 Piston Pump Group

(1) Tighten the plug to the following torque. ... 34 ± 3 N·m (25± 2 lb ft)

(2) Lubricate the bore with a minimal amount of lubricant that is being sealed.

(3) Tighten the plug to the following torque. ... 1 ± 0.1 N·m (9 ± 1 lb in)

(4) Tighten the orifice to the following torque. ... 13 ± 2 N·m (115 ± 18 lb in)

(5) Tighten the plug to the following torque. ... 60 ± 6 N·m (44 ± 4 lb ft)

(6) The port locations of the barrels must be matched when the pump is assembled.

(X) Depth of dowel pin 5.55 mm to 5.80 mm (0.22 inch to 0.23 inch)

Illustration 2	g01167403
Auxiliary views

(7) Tighten the plug to the following torque. ... 140 ± 14 N·m (105 ± 10 lb ft)

(8) Tighten the plug to the following torque. ... 13 ± 2 N·m (115 ± 18 lb in)

(9) At installation, apply 1U-8846 Gasket Sealant .

(Y) Depth of dowel pin ... 6.8 mm to 9.0 mm (0.26 inch to 0.35 inch)

254-6561 Pump Control Valve

Illustration 3	g01167410
254-6561 Pump Control Valve

(10) Lubricate the bore with a minimal amount of lubricant that is being sealed.

(11) Tighten the nut to the following torque. ... 30 ± 7 N·m (22 ± 5 lb ft)

(12) Tighten the nut to the following torque. ... 177 ± 15 N·m (130 ± 11 lb ft)

(13) Tighten the piston to the following torque. ... 350 ± 30 N·m (260 ± 22 lb ft)

(14) At installation, apply 155-0695 Thread Lock Compound .

(15) 270-8937 Spring

Length under test force ... 25.9 mm (1.02 inch)

Test force ... 59 ± 3 N (13 ± 1 lb)

Free length ... 27.6 mm (1.09 inch)

Outside diameter ... 22.7 ± 0.2 mm (0.89 ± 0.01 inch)

(16) 263-1202 Spring

Length under test force ... 75 mm (2.95 inch)

Test force ... 772 ± 38 N (174 ± 9 lb)

Free length ... 104.69 mm (4.12 inch)

Outside diameter ... 28 ± 0.15 mm (1.102 ± 0.006 inch)

Flow Specifications

Use SAE 10 oil at 68° ± 14°C (154° ± 25°F) to test the pump.

Maximum system pressure at 259 ± 4 L/min (68 ± 1 US gpm) ... 30300 ± 200 kPa (4395 ± 30 psi)

Test at Full Speed

Output ... 270 L/min (71 US gpm)

Pressure ... 6900 kPa (1000 psi)

Pump speed at rated engine speed ... 1800 rpm

Input power of pump at main relief ... 100.25 kW (134.4 hp)

Margin Pressure Setting

Margin pressure ... 1965 ± 100 kPa (285 ± 15 psi)