DLM HED Series, Owner & User Manual

Page: 33 / 48

31
Manual No. 4111-0027
Sept. 2009
May 2012
31
Regular maintenance must be performed on a weekly
and quarterly schedule.
Weekly Maintenance
• Operate the dock leveler through the complete
operating cycle to maintain lubrication.
NOTE: To thoroughly inspect the platform hinge area,
put the platform in the full below-dock position.
• Inspect the platform hinge and the lip hinge areas.
The hinge areas must be kept free of dirt and
debris. Build-up of foreign material in the hinge
areas will cause abnormal operation.
Quarterly Maintenance
• Lubricate the following areas with light weight
machine oil:
(C)(D) - Apply oil to each of the hoist and lip
cylinder trunnions
• Lubricate the following areas with white lithium
grease:
(A)(B) - Zerk fittings on both lip and platform hinge
lines
• Check reservoir fluid level (Q):
1. Put the dock leveler platform at the full above-
dock position, engage prop.
2. Turn OFF all electrical power to the leveler.
3. Measure fluid level. The fluid level should be
approximately 3 in. (76.5 mm) (N) from top
of reservoir (M) with platform raised on the
maintenance prop.
4. Add hydraulic fluid if necessary. Use only
recommended fluid. Reference page 30
5. Turn ON electrical power to the leveler.
6. Return the platform to the stored position.
M -- Reservoir N- 3 in. (76.5mm)
From Top of Reservoir
P - Breather Cap Q - Fluid Level
IMPORTANT
Failure to properly lubricate the dock leveler will
cause abnormal operation of the leveler.
IMPORTANT
A low fluid level or the use of hydraulic fluids not
equivalent to the fluid types recommended, will
cause abnormal operation of the leveler and WILL
void warranty.
Q
N
P
M
Periodic Maintenance
MAINTENANCE