Page 30
45-J Desel - Servce & Parts Manual
January 2022
Secton 10 - Hydraulc System
The Steering Cross Port Relief Valves (3.1 and 3.2) should be set to 1500 psi (103 bar).
Insert a 0-5000 psi gauge into the port GP of the Main Functions Manifold.
Loosen the lock nuts on Steering Cross Port Relief Valves 3.1 and 3.2 on the Main Functions
Manifold.
Steer the wheels fully left. Hold the switch for 10 seconds. This is the reading for valve 3.1.
If pressure is LOW, adjust Valve 3.1 ¼ turn clockwise and recheck.
If pressure is HIGH, adjust Valve 3.1 ¼ turn counterclockwise and recheck.
Steer the wheels fully right. Hold the switch for 10 seconds. This is the reading for valve 3.2.
If pressure is LOW, adjust Valve 3.2 ¼ turn clockwise and recheck.
If pressure is HIGH, adjust Valve 3.2 ¼ turn counterclockwise and recheck.
Tighten the lock nuts on the valves.
Boom Extend Relief 10
Park the machine on a firm level surface free from overhead obstructions.
The Boom Extend Relief Valve (10) should be set to 1500 psi (107 bar).
Insert a 0-5000 psi gauge into the port GP1 of the Functions Manifold.
Loosen the lock nut on the Boom Extend Relief Valve on the Main Functions Manifold.
With no load on platform, use the Boom Extend function to extend the boom completely������
Press and hold the Boom Extend switch for 10 seconds to get an accurate reading on the
pressure gauge.
If pressure is LOW, adjust steering relief valve ¼ turn clockwise and recheck.
If pressure is HIGH, adjust steering relief valve ¼ turn counterclockwise and recheck.
Repeat until correct.
Tighten the lock nut on the valve.
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