Part No. 29487
Genie Z-45/22
5 - 43
Service Manual - First Edition
Section 5 - Troubleshooting Flow Charts
2000
PSI
function
operates
12V
0V
4 to 5 ohms
function inoperative
less than 2000 PSI
2000
PSI
2000
PSI
less than 2000 PSI
Hold ground control
function switch and
check volts at grn wire
on platform rotate left
function directional
valve.
Repair open in grn wire
circuit from TB16 to
directional valve.
Remove both wires from
valve coil and check
resistance across the
coil terminals.
0 or infinite ohms
Replace the coil.
Hold toggle switch left
and manually override
the rotate left directional
valve (push in button on
end of valve spool). OR
interchange valve (item
E) with a like valve (item
D).
function operates
Install a pressure gauge
at the quick disconnect
coupling on the function
manifold and hold the
function switch.
Replace defective
counterbalance valve.
Chart 28
Platform Rotate
Left Function
Inoperative
Be sure all other
functions operate
normally.
If platform rotate left
function operates
normally from the
ground controls but not
from the platform
controls, troubleshoot
the platform control
toggle switch. See
Repair section.
If platform rotate left
function operates
normally from the
platform controls but
not from the ground
controls, troubleshoot
the ground control
toggle switch. See
Repair section.
Replace the platform
rotate directional
valve.
Interchange the platform
rotate left and right
counterbalance valves in
the manifold installed on
the primary boom
extension located under
the platform.
Check for mechanical
restrictions keeping
platform from rotating
OR repair hydraulic
rotator OR replace
directional valve.
Remove the rotate left
function pressure line
from the manifold and
cap the port (PR1).
Then, with pressure
gauge still attached,
operate the function left.
Repair the hydraulic
rotator OR replace the
rotator counterbalance
valves and/or manifold.
Replace the directional
valve OR the manifold
has internal defects OR
one of the previous tests
was possibly overlooked
or diagnosed incorrectly.
Recheck and/or consult
Genie Industries service
department.
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