Page 45
Trou
b
leshoo
tin
g
Dia
g
n
os
i
s Ch
a
r
t
FUNCT
I
ON
SYMPTOM
POSS
IB
L
E
CAUS
E
R
E
M
ED
Y
2.20
Faulty or
Sluggish
Operation
continued
continued
2.00
PLATFORM
UNFOL
D
(Ou
t
)
3.20
Faulty or
Sluggish
Operation
5.00
ROLL STOP
LATCH
Faulty
Unlatching
3.10
No
Operation
Correct/Replace/Lubricate.
See
Maintenance and Lubrication Schedule
and Diagram
Check and correct
Correct.
See Lift Positioning (pages 10-12
and Positioning and Clearance Checklist
(pages 22 and 23).
Correct or replace
Replace
Check for contamination or kinks - correct
or replace
Thin with Diesel fuel - 2 T. Change in
spring.
See Systems Descriptions for full-
time cold climate specifications
Replace
Unfold platform
Check for loose connection or replace.
See Systems Descriptions for Quick-
Check Procedure
Replace
Check for loose connection or replace
Replace
Adjust or replace.
Connect, repair or replace
Lower platform
Remove obstruction or lower platform in
different location (level surface)
Correct or replace.
Correct or replace
Correct or replace
Lubricate —
See Maintenance and
Lubrication Schedule and Diagram
2.22 Misalignment or damage to:
• Parallel arms and/or pivot pins
• Rotating pivot slide arms and/
or pivot pins
• Handrails and/or pivot pins
• Platform fold axles
• Platform pivot pins/lower fold arms
2.23 Mechanical binding
2.24 Misalignment of towers (upright
supports)
2.25 Gas spring(s) weak, loose or
defective
2.26 Worn or missing unfold gas springs
2.27 Restriction in hydraulic lines
2.28 Hydraulic fluid too thick due to cold
climate
2.29 Flow control valve(s) restricted
2.31 See 2.13
3.11 Platform not unfolded
3.12 See 1.20
3.13 Down and/or Bridge solenoid/
valves: Poor connection, bent shaft
or contaminated filter
3.14 See 2.12, 2.13, 2.14 and 2.23
3.15 Bridging relay defective
3.16 See 4.12, 4.13
3.21 Unfold solenoid/valve: Poor
connection or bent shaft
3.22 See 2.21, 2.22, 2.23, 2.24, 2.27,
2.28 and 2.29
4.11 Bridging solenoid/valve stuck open
due to contamination or otherwise
defective
4.12 Bridging microswitch out of
adjustment or defective
4.13 Bridging microswitch harness
disconnected, damaged or
otherwise defective
4.14 See 3.15
5.11 Platform not fully lowered
5.12 Obstruction under platform
preventing latch foot from contact-
ing surface
5.13 Roll stop damaged (bent, deformed
or misaligned)
5.14 Latch bent, deformed or misaligned
5.15 Latch pivot pin adapters damaged
or missing
5.16 Lack of lubrication
2.30
Faulty Floor
Level Switching
3.00
Pl
at
for
m
D
OWN
4.10
No
Operation
4
.00
B
r
i
dg
in
g
5.10
Faulty
Unlatching
