Genie Z-34/22IC, Руководство по обслуживанию

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4 - 50 Z-34/22 IC Part No. 128267
July 2007 Section 4 • Repair Procedures
REV A
10-7
Valve Adjustments -
Traction Manifold
How to Adjust the Charge
Pressure Relief Valve
The charge pressure relief valve needs to be set
for machine performance rather than a specific
pressure value. The relief valve is set correctly
when the engine does not stall when placed under
a heavy load.
1 Chock both sides of all four wheels of the
machine.
Note: Be sure the machine cannot move in either
direction.
2 Start the engine from the platform controls.
Slowly move the drive joystick to full stroke in
either direction.
Result: The engine rpm lowers considerably, as
if the engine is under a heavy load, but does
not stall. The charge pressure relief valve is set
correctly. Proceed to step 8.
Result: The engine rpm does not lower
considerably. The charge pressure relief valve
is set too low. Proceed to step 3 to adjust the
charge pressure relief valve.
Result: The engine stalls. The charge pressure
relief valve is set too high. Proceed to step 3 to
adjust the charge pressure relief valve.
MANIFOLDS
3 Turn the engine off. Connect a 0 to 600 psi /
0 to 40 bar pressure gauge to the test port
located on the traction manifold.
4 Start the engine from the platform controls.
Slowly move the drive joystick to full stroke in
either direction and observe the pressure
reading on the pressure gauge.
Result: When the charge pressure relief valve is
set correctly, the pressure reading on the
gauge should be between 135 to 180 psi /
9 to 12 bar.
5 Turn the engine off. Hold the relief valve and
remove the cap (item B or BD).
6 Adjust the internal hex socket. Turn it clockwise
to increase the pressure or counterclockwise
to decrease the pressure. Install the relief valve
cap.
7 Repeat this procedure beginning with step 2.
8 Remove the wheel chocks.
9 Turn the engine off and remove the pressure
gauge.