NorAM 65E Turbo Motor Grader, Service Manual

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65E Turbo Motor Grader
Service Manual
8 - 7 Service 2.00_2013.03
Section 8
Hydraulics
T
ROUBLESHOOTING
When performing a test on the hydraulic system, use the proper test procedures and test equipment.
Before testing, lower attachments to the ground. If testing is to be performed with raised attachment, make
sure lock pin is installed, and that attachment is resting on lock pin.
Before opening the hydraulic system, clean the area thoroughly to prevent contaminating the system.
Relieve all pressure from the system.
Before testing the hydraulic system, the oil must be at normal operating temperature.
If testing requires the grader to be raised, use adequate lifting, blocking, and/or jack stands to securely sup -
port the grader.
When connecting test equipment to hydraulic system, relieve pressure in
system, stop engine, turn ignition switch to "on" position and operate all
hydraulic control valve circuits to relieve pressure. Turn ignition switch
to "off" position.
Use adequate lifting, blocking, and/or jack stands to make sure that
grader is safely supported.
Gauges, gauge fittings, and hoses must have operating pressure ratings
of at least 25% higher than the highest pressures of the system.
Never adjust or replace the relief valves to get higher pressures than
those specified by the equipment manufacturer.
Fluid under pressure can have sufficient force to penetrate the skin,
causing serious personal injury. Always protect the skin and eyes from
escaping fluid under pressure.
Before disconnecting lines or fittings, be sure to turn off the engine and
relieve all pressure. before applying pressure to the system, be sure all
connections are tight and that lines, pipes, and hoses are not damaged.
If injured by escaping fluid, obtain medical assistance at once. Serious
infection or reaction can develop if medical treatment is not administered
immediately.
Remove any attachment from mounting plate before loosening or
disconnecting any hydraulic lines.