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174
SJ1044 TH, SJ1044 THS, SJ1056 TH, SJ1056 THS, SJ1256 THS
230790ABA
Section 5 – Procedures
Non-Routine Maintenance
RV1 Safety Relief Pressure
▪
RV1 Safety Relief Check:
1.
Release residual pressure by moving the joystick
several times in each direction.
2.
Install a 5,000 psi gauge at port GP1 of Main
Control Valve.
Port GP1
Figure 109
System Pressure Adjustment
3.
Loosen the pressure compensator nut and turn
the pressure compensator clockwise one full
turn.
4.
With engine running at low idle, dead-head
the boom retract function. Indicated system
pressure should be:
▪
3500 psi for SJ1044/1056 TH/THS
▪
4300 psi for SJ1256 THS.
▪
If reading is different than what is mentioned
above, adjustment is required.
RV1 Safety Relief Adjustment:
1.
Loosen the pressure compensator nut and turn
the pressure compensator clockwise one full
turn.
2.
With engine running at low idle, loosen the lock
nut on the maximum steering pressure reducing
valve at port RV1 on the main manifold valve.
Port RV1
Figure 110
Maximum Steering Pressure Adjustment
3.
Dead-head the boom retract function, turn
the RV1 adjustment screw clockwise (CW) to
increase the pressure reading and counter-
clockwise (CCW) to reduce the pressure reading
until desired reading is achieved.
▪
3500 psi for SJ1044/1056 TH/THS
▪
4300 psi for SJ1256 THS.
4.
Tighten the lock nut on the valve RV1 and re-
check the reading to ensure that the correct
pressure is maintained.
5.
With engine running at low idle, dead-head
the boom retract function, turn the pressure
compensator adjustment screw clockwise (CW)
to increase the pressure reading and counter-
clockwise (CCW) to reduce the pressure reading
until desired reading is achieved. Indicated
compensator pressure should be:
▪
3250 psi for SJ1044/1056 TH/THS
▪
3900 psi for SJ1256 THS.
Содержание SJ1044 TH
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