STINAR 25781, Operation & Maintenance Manual

Page: 67 / 112

Disabled Passenger Lift DPT-512 | 67
SECTION 2 | SERVICING THE HIGH LIFT TRUCK
TROUBLE PROBABLE CAUSE SOLUTION
Van body will not raise
when a BODY control
switch is held in the
UP position.
Stabilizers not down
and set.
Fully lower stabilizers.
Malfunctioning
hydraulic pump. Repair hydraulic
pump.
Defective maximum
height switch.
Repair or replace
switch.
Problem with stabilizer
pressure switch.
Adjust or replace
pressure switch. See
Chapter 2, Section 3.
Defective control valve
lift up solenoid.
Replace solenoid.
Defective van body up/
down control switch.
Replace switch.
Defective relay K12. Replace relay.
Hydraulic problem.
See the Hydraulic
System section of
this Troubleshooting
table.
Body raises, or
stabilizers raise or
lower too slowly or
quickly.
Hydraulic problem.
See Hydraulic System
Troubleshooting.
Van body raises but
will not lower, or lower
fully.
Defective solenoid on
lift cylinder lock valve.
Replace solenoid.
Check both lock
valves.
Defective control valve
lift down solenoid.
Replace solenoid.
Defective body control
switch.
Replace switch.
Cab BODY UP
indicator remains lit
when body is fully
lowered.
Improperly adjusted or
defective body position
limit switch.
Repair or replace
switch.
Engine does not stop
running when STOP
switch is pushed in.
Defective stop switch or
contact. Replace switch or
contact.
Relay K2 defective. Replace relay.
NOTE:
The stabilizers cannot be
retracted and the truck
cannot be driven while the
BODY UP indicator is lit.