SKYJACK, Page 104
SJRT Compact Series
Engine Powered
5.3
System Lift and Pressure
Adjustment
All adjustments must be made with a Calibrated
Hydraulic Gauge. Refer to the Serial Number
Nameplate located on the rear of the machine for
System and Lift Pressure values.
System Relief Pressure Adjustment
1.
Locate the Right Steer Hydraulic line at the
Main Manifold. (Refer to Hydraulic Manifold
Component and Port Identification found in
SECTION 3 for location.)
2.
Tee in a Calibrated 3000 PSI Gauge into the
Right Steer line.
3.
Remove the Operator’s Control Box from the
guardrail and disconnect it from the Scissors
Control Cable.
4.
Locate the Electrical Panel Cable Plug in the
Hydraulic/Electric Cabinet.
5.
Disconnect the Scissors Control Cable and
connect the Operator’s Control Box Cable.
6.
At the Main Manifold, loosen the locknut on the
System Relief Valve (R1). (Refer to Hydraulic
Manifold Component and Port Identification
found in SECTION 3 for location.)
7.
Select “DRIVE” position with the Lift/Drive Select
Switch on the Platform Control Box.
8.
Engage Steer Right Switch on the top of the
Controller Handle and hold.
9.
Check the reading on Pressure Gauge. Adjust
the System Relief Valve (R1) to the pressure
listed on the Serial Number Nameplate.
NOTE
Turning the stem on the Relief Valve
clockwise increases pressure. Turning
the stem counter-clockwise decreases
pressure.
10.
Release the Steer Switch and retighten the
locknut on the System Relief Valve (R1).
11.
Remove the gauge from the Steer line.
Lift Pressure Adjustment
WARNING
Fully lower the platform.
1.
Locate the Lift line coming out of the Main
Manifold. (Refer to Hydraulic Manifold
Component and Port Identification found in
SECTION 3 for location.)
2.
Open the Manual Lowering Valve with the
platform fully lowered. Remove the Lift line from
the Main Manifold.
3.
Install a 3000 PSI Gauge into the Lift line port
fitting on the Main Manifold. Plug the Lift line
going to the Lift Cylinders.
4.
Loosen the locknut on the Lift Relief Valve
(R2). (Refer to Hydraulic Manifold Component
and Port Identification found in SECTION 3 for
location.)
5.
Close the Manual Lowering Valve. Using the
Base Controls in the Hydraulic/Electric Cabinet,
depress and hold the Up Push-Button Switch.
6.
Observe the reading on the gauge. Adjust the
Lift Relief Valve (R2) to the pressure listed on
the Serial Number Nameplate.
NOTE
Turning the stem on the Relief Valve
clockwise increases pressure. Turning
the stem counter-clockwise decreases
pressure.
7.
Release the Up Push-Button and retighten the
locknut on the Lift Relief Valve (R2).
8.
Remove the gauge from the Lift line port fitting
and reinstall the Lift line.
WARNING
Ensure machine does not lift more than
rated load.
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