Poweramp HNL SERIES HYDRAULIC - Manual (Page 31)

29 Manual No. 4111-0029
November 2009
May 2012
MAINTENANCE
Periodic Maintenance
M — Reservoir
N —1 in. (25.5 mm) (From Top of
Reservoir)
P — Breather Cap
Q — Fluid Level
Check reservoir fluid level (Q):
1. Put the HNL in the stored position.
2. Turn OFF all electrical power to the HNL.
3. Wipe off plastic tank as needed (P).
4. Measure fluid level. The fluid level should be
approximately 1 in. (25.5 mm) (N) from top of
reservoir (M) with HNL stored.
5. Add hydraulic fluid if necessary. Use only
recommended fluid. See previous page.
6. Install cover.
7. Turn ON electrical power.
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.
M
Q
P
N
When maintenance is to be performed in front of the
dock leveler, support the lip with the handle in the
maintenance prop position.
Put handle into maintenance prop position by removing
bolt and locknut at base of handle assembly. Pull
handle out of roller arm assembly and place into
maintenance prop receiver. (If equipped)
If maintenance requires that the lip be in the extended
position, raise the lip by hand and support the lip with
the lip maintenance prop.
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.
• 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 increase wear and cause abnormal
operation.
Quarterly Maintenance
• Lubricate the following areas with light-weight
machine oil:
• Extended link arm pivots (A)
• Lip linkage pivot (B)
• Base linkage pivot (C)
• Hoist and lip cylinder trunnions (D)(E)
• Lubricate the following areas with white lithium
grease:
• Lip plate grease fittings
• Base plate grease fittings
• Zerk fittings on both lip and platform hinge lines
(F)(G)
Note: Failure to lubricate the dock leveler will
cause abnormal operation of the leveler.