938G Wheel Loader and IT38G Integrated Toolcarrier Braking System Caterpillar

Illustration 1	g00274353
(1) Section for Steering System (Shaft End). (2) Section for Hydraulic System (Center Section). (3) Section for Brake System (Cover End).

Illustration 2	g00274354
Brake Pump

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

This brake pump is a vane type pump.

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

Test At Full Speed

Output ... 22 L/min (5.8 US gpm)

Pressure ... 690 kPa (100 psi)

Pump speed ... 2600 rpm

Engine speed ... 2390 rpm

Output ... 19 L/min (5 US gpm)

Pressure ... 6900 kPa (1000 psi)

Pump speed ... 2600 rpm

Engine speed ... 2390 rpm

Test At Half Speed

Output ... 10 L/min (2.6 US gpm)

Pressure ... 690 kPa (100 psi)

Pump speed ... 1300 rpm

Engine speed ... 1195 rpm

Output ... 9 L/min (2.4 US gpm)

Pressure ... 6900 kPa (1000 psi)

Pump speed ... 1300 rpm

Engine speed ... 1195 rpm

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

(5) Torque for the four bolts ... 54 ± 7 N·m (40 ± 5 lb ft)

(6) 1U-2816 Spring

Length under test force ... 14.7 mm (.58 inch)

Test force ... 192 ± 14 N (43 ± 3 lb)

Free length after test ... 29.7 mm (1.17 inch)

Outside diameter ... 29.65 ± 0.52 mm (1.167 ± .020 inch)

Reference: For the specifications for the steering pump, refer to Specifications, SENR6788, "938G Wheel Loader and IT38G Integrated Toolcarrier Steering System" .

Reference: For the specifications for the implement hydraulic pump, refer to Specifications, SENR6794, "938G Wheel Loader and IT38G Integrated Toolcarrier Hydraulic System".