Disabled Passenger Lift DPT-512 | 61
SECTION 2 | SERVICING THE HIGH LIFT TRUCK
TROUBLE
PROBABLE CAUSE
SOLUTION
Stabilizer legs creep
up or down.
Defective cylinder seals. Replace cylinder seals.
Lock valve defective.
Repair or replace
valve.
Leaks in system.
Find and repair leaks.
Lift will not raise.
Stabilizers not down.
Lower stabilizers.
Insufficient or no
hydraulic pressure.
See above.
Lift emergency lowering
lever is engaged.
Disengage lever.
Emergency body down
override bolt screwed in.
Release override bolt.
Stabilizers down; pressure
switch improperly
adjusted or defective.
Adjust or replace
pressure switch. See
Section 3.
Defective directional
control valve.
Repair or replace
valve.
Mechanical problem.
See mechanical
troubleshooting.
Electrical problem.
See electrical
troubleshooting.
Lift will not lower.
Defective lock valve.
Repair or replace valve.
Flow control valve
improperly adjusted or
defective
Adjust or repair valve.
See Chapter 2, Section
3.
Defective directional
control valve.
Repair or replace
valve.
Lift creeps down.
Defective lock valve.
Repair or replace
valve.
Defective lift cylinder
seals.
Replace lift cylinder
seals.
Leaks in system.
Find and repair leaks.
Lift lowers too fast.
Lift flow control valve is
out of adjustment.
Adjust the flow
control by following
the instructions in
Section 2-3.
Cylinder seal is
defective.
Replace the seal.
Summary of Contents for 25781
Page 12: ...Disabled Passenger Lift DPT 512 12 FIGURE 1 1 1 DISABLED PASSENGER TRANSPORTER MODEL DPT 512...
Page 13: ...Disabled Passenger Lift DPT 512 13 FIGURE 1 1 1 DISABLED PASSENGER TRANSPORTER MODEL DPT 512...
Page 22: ...Disabled Passenger Lift DPT 512 22 FIGURE 1 1 10 HYDRAULIC COMPONENT GROUP...
Page 33: ...Disabled Passenger Lift DPT 512 33 FIGURE 1 2 1 1 CAB CONTROLS AND INDICATORS...
Page 36: ...Disabled Passenger Lift DPT 512 36 FIGURE 1 2 1 3 VAN BODY CONTROL STATION...
Page 38: ...Disabled Passenger Lift DPT 512 38 FIGURE 1 2 1 7 EMERGENCY OPERATING CONTROLS...
Page 57: ...Disabled Passenger Lift DPT 512 57 FIGURE 2 1 9 3 LUBRICATION POINTS...
Page 74: ...Disabled Passenger Lift DPT 512 74 FIGURE 2 3 1 HYDRAULIC COMPONENT GROUP...
Page 95: ...Disabled Passenger Lift DPT 512 95 FIGURE 4 2 5 PLATFORM ASSEMBLY 6 7 8 4X 2 3 8X 1 5 4 9...
Page 107: ...Disabled Passenger Lift DPT 512 107 FIGURE 4 2 11 CAB CONTROLS AND INDICATORS...
Page 109: ...Disabled Passenger Lift DPT 512 109 FIGURE 4 2 12 VAN BODY CONTROL STATION...
Page 111: ...Disabled Passenger Lift DPT 512 111 FIGURE 4 2 13 REAR VAN CONTROL STATION...