SECTION 4 - BASIC HYDRAULIC INFORMATION & SCHEMATICS
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6.
Press the up arrow key to change the Lift Up
default personality to 100%. Press ENTER. Then
press ESC to return to the main menu.
7.
Press the right arrow key to scroll to the CALI-
BRATIONS menu. Press ENTER.
8.
Press the right arrow key to scroll to the CALI-
BRATIONS: RELIEF PRESSURE menu. Press ENTER.
9.
To set pressure, activate Lift Up at the ground
controls when the Analyzer prompts LIFT UP TO
RUN PUMP.
10.
Adjust Main Relief until the MP port gauge reads
3200 psi (220 bar).
11.
Press ESC to exit the CALIBRATION menu and
return to the main menu.
Lift Up Relief
With Lift Up still set at default (100%), lift the scissor
until the platform is at full stroke. Adjust lift up relief
until the MP port gauge reads 2550 psi (176 bar).
NOTE:
To return the Lift Up personality to its original set-
tings, navigate to the PERSONALITIES: LIFT and
adjust. Cycle power when personality is back at
desired value.
Steer Relief
NOTE:
To diagnose cylinder problems it may be necessary
to install tee fittings and diagnostic ports due to the
steer spool restricting flow.
1.
Install gauge rated for 4000 psi (276 bar) on the
MP port.
2.
Reduce steer personality to 26%. If personality is
not reduced, main pressure may be active.
3.
Steer wheels fully to the right and adjust steer
right relief to 1150 psi (80 bar) & lock the relief
adjustment.
4.
Now steer wheels fully to the left and adjust the
left relief to 1150 psi (80 bar) & lock the relief
adjustment.
5.
Return Steering Personalities to their original
settings.
4.12 CYLINDER CHECKING PROCEDURE
NOTE:
Cylinder check must be performed anytime a system
component is replaced or when improper system
operation is suspected.
1.
Using all applicable safety precautions, activate
pump motor and fully extend cylinder to be
checked.
2.
Carefully disconnect hydraulic hoses from
retract port of cylinder. There will be some initial
weeping of hydraulic fluid which can be caught
in a suitable container. After the initial discharge,
there should be no further drainage from the
retract port.
3.
Activate pump motor and extend cylinder.
4.
If cylinder retract port leakage is less than 6-8
drops per minute, carefully reconnect hose to
port and retract cylinder. If leakage continues at
a rate of 6-8 drops per minute or more, cylinder
repair must be made.
NOTE:
Steps 5 through 7 for Steer Cylinder Only.
5.
With cylinder fully retracted, shut down machine
power and carefully disconnect hydraulic hose
from cylinder extend port.
6.
Activate pump motor and retract cylinder. Check
extend port for leakage.
7.
If extend port leakage is less than 6-8 drops per
minute, carefully reconnect hose to extend port,
than activate cylinder through one complete
cycle and check for leaks. If leakage continues at
a rate of 6-8 drops per minute or more, cylinder
repairs must be made.
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