Page 44
FUNCTION
SYMPTOM
POSSIBLE CAUSE
REMEDY
Troubleshooting Diagnosis Chart
5.10
No
Operation
5.20
Motor Runs
But
Doesn’t Lift
5.00
PLATFORM
UP
4
.00
OUTBOARD
ROLL STOP
4.31 Platform not raised 2" above
ground level
4.32 Roll stop torsion spring(s) dam-
aged, detached or missing
4.33 See 4.23, 4.24, 4.25, 4.26, 4.27,
4.28 and 5.00
4.41 See 4.22, 4.30 and 5.00
5.11 Backup pump release valve not
closed
5.12 See 1.00
5.13 Up/Fold microswitch out of
adjustment or defective
5.14 Microswitch harness disconnected
or damaged
5.15 Up/Fold solenoid not functioning
5.16 Motor brushes worn
5.21 See 5.11
5.22 Low hydraulic fluid supply.
Note:
Fluid should be changed if there is
visible contamination. Inspect the
hydraulic system for leaks if fluid
level is low.
5.23 Leak in hydraulic system
5.24 Cylinder(s) leak
5.25 Down solenoid/valve stuck open
due to contamination or otherwise
defective
5.31 Relief valve set too low
5.32 Excessive load
5.33 See 3.20, 5.16 and 5.20
5.41 Backup pump release valve
contamination
5.42 See 5.11 and 5.20
5.51 See 5.13
5.61 See 2.22, 2.23, 2.24, 2.26, 2.27
and 2.29
5.62 Air in hydraulic lines
Raise platform minimum 2"
Correct or replace
Close valve
Adjust or replace.
See Microswitches in
Systems Descriptions for details (page
37)
Connect, repair or replace
Check for loose connection or replace
Replace pump motor
Add Dextron III transmission fluid.
Check oil level with
platform fully
lowered
.
See Systems Descriptions
for details
Repair
Repair or replace.
See Systems
Descriptions for details.
Replace
Factory set at 2100 psi.
See Systems
Descriptions for adjustment procedure
Remove excess weight
Flush clean or replace.
See Systems
Descriptions for Priming and Flushing
procedure
Check hydraulic fluid level and add
Dextron III transmission fluid if required.
Cycle lift 10 times pausing a few
moments between cycles to allow air to
move out of lines.
Note:
Check oil
level with
platform fully lowered
.
See
Systems Descriptions for details.
continued
5.30
Sluggish
Operation
5.60
Front and Rear
Parallel Arms
Not “In-Time”
(out-of-sync)
5.40
Platform
Drifts
Down
5.50
Faulty Floor
Level Switching
4.40
Faulty Fold
4.30
No
Fold
Operation
