NorAM 65E Turbo Motor Grader, Service Manual

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65E Turbo Motor Grader
Service Manual
8 - 9 Service 2.00_2013.03
Section 8
Hydraulics
P
RESSURE
S
ETTINGS
Main Relief Valve
The main relief valve is located in the inlet section of the
control valve. It should be set at 131
- 144 bar
(1900 - 2100 psi).
The pressure should be tested with the oil above 71 °C
(160°F). To test the main relief valve pressure:
Step 1: Park the machine and set the parking brake.
Turn off the engine.
Step 2: Open the left side engine access panel door.
Step 3: Remove cap from main relief valve test point, 1,
located on forward LH side of tandem pump, at rear of
transmission.
Step 4: Using correct fittings (female 73163493), connect
a pressure gauge to the test point, 1.
Step 5: Using all applicable safety practices start the
engine. Operate a function until system goes into relief
mode. Record inlet pressure at gauge.
NOTE: If equipped, the saddle lock pin is the preferred
function for operation.
Step 6: With saddle lock pin engaged, if pressure is not
between 131 - 144 bar (1900 - 2100 psi) adjust the relief
valve cartridge.
a) Place a lift under the control valve cover plate, 1.
Remove seven bolts, 2, securing cover plate.
Remove cover plate.
1
2