Dhollandia DH-L 3300 lbs, Installation Manual, Page: 81 / 82

SERV-US general checklist for preventive maintenance and repair-US en-2020-01
4/5
10 Extras for cantilever liftgates Frequency OK ? Corrected
Rear closure platform, in travel position
Pressure against the rear frame, sealing, adjustment of the tilt cylinder extensions
Yearly
Platform behind rear doors, in travel position
Correct distancing from the rear doors, interference with the rear doors, adjustment of the tilt
cylinder extensions Yearly
11 Practical tests Frequency OK ? Corrected
General operation test with empty platform
•
Execute all movements minimum 3 times with all available control units.
•
Liftgate should operate smoothly and quietly through its full range of motion.
•
Check condition of articulation points (no excessive play).
•
Verify correct auto-tilt function at ground level (if applicable).
90 days 1750
cycles
Dynamic weight test at 100% of the maximum rated lift capacity
•
Place the platform at rest on the ground.
•
Put a load equal to 100% of the maximum rated lift capacity at the center point of
maximum load.
•
Lift the platform. Check if lift capacity is sufficient. Check general operation and stability.
•
Check safe working speeds:
→
Lift & lower: max. 6” / sec
→
Hydraulic open and close: max. 10° / sec
→
Auto-tilt at ground level (if applicable): max. 4° / sec
Yearly
Overload test, adjustment of pressure relief valve
•
Place the platform at rest on the ground.
•
Put a load of 100% of the maximum rated lift capacity at the center point of maximum
load. Adjust the hydraulic pressure at the pressure relief valve so that the maximum
rated lift capacity is just reached.
•
Add max. 10% or max. 200 lbs overload (whichever is the least) at the center point of
maximum load. Adjust the hydraulic pressure so that the platform cannot lift the
maximum rated lift ca the overload.
•
Refer to procedure I-SERV-G-003 in the Maintenance and Repair Manual.
•
(Note: pressure should never exceed 220 bar / 3190 psi)
Yearly
DH-S slider liftgates: slide-in / out test
•
Slide liftgate in / out 3 times
•
Ensure sliding movement evolves smoothly, without juddering
•
Slide out and lift fully. Check correct alignment of the platform flush with the vehicle
bed.
180 days
3500 cycles
Hydraulic circuit general
No visible oil leaks during operation and at rest
90 days 1750
cycles