5 - 42
Genie Z-45/22
Part No. 29487
Service Manual - First Edition
Section 5 - Troubleshooting Flow Charts
2000
PSI
12V
0V
4 to 5 ohms
0 or infinite ohms
function operates
function inoperative
less than 2000 PSI
2000
PSI
less than 2000 PSI
2000
PSI
Hold ground control
function switch and
check volts at org/blk
wire on platform level
down function directional
valve.
Repair open in org/blk
wire circuit from TB14 to
directional valve.
Remove both wires from
valve coil and check
resistance across the
coil terminals.
Replace the coil.
Hold toggle switch and
manually override the
level down directional
valve (push in button on
end of valve spool) OR
interchange valve (item
D) with a like valve (item
E).
Replace the platform
leveling directional
valve.
Install a pressure gauge
at the quick disconnect
coupling on the function
manifold and hold the
function switch.
Interchange the level up
and down
counterbalance valves in
the sandwich block.
function
operates
Replace defective
counterbalance valve.
Remove the level down
function pressure line
from the manifold and
cap the port (PL2). Then,
with pressure gauge still
attached, operate the
function down.
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.
Check for mechanical
restrictions and/or a
condition exists in
which the cylinder
counterbalance valves
are not allowing the
cylinder to retract or
the cylinder has
internal defects.
Disconnecting
hydraulic lines or
adjusting the cylinder
counterbalance valves
in this situation can be
very dangerous
Please consult Genie
Industries service
department.
Chart 27
Platform Level
Down Function
Inoperative
Be sure all other
functions operate
normally.
If platform level down
function operates
normally from the
ground controls but not
from the platform
controls, troubleshoot
the platform control
toggle switch. See
Repair section.
If platform level down
function operates
normally from the
platform controls but
not from the ground
controls, troubleshoot
the ground control
toggle switch. See
Repair section.
Repair the master and/or
slave cylinder OR
replace the slave
cylinder counterbalance
valves.
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