27
4111-0024 — Apr. 2020
© 2020 Systems, LLC
Quarterly Maintenance
• Complete Weekly Maintenance.
• Inspect the following for damage/abnormal wear:
• Check welds for cracks.
• Coils for cracks and bent valves.
• Lower pin and mounting holes.
• Rear hinge pins and cotter pins.
• Stored limit switch is securely mounted.
• Rue clip is in manual lock position.
• Check J-box for water damage.
•
Hoses,cylinders, fittings and powerpack.
• Control box and conduit for damage
•
Check fluid level wth the unit in stored position.
• Bumpers for more than 1” of wear. Replace
worn, loose, damaged or missing bumpers.
• Lubricate the following areas with light weight
machine oil (see Figure 27):
(
A
)— Lip hinge area (apply oil to the top of the
entire length of lip hinge when platform is in
the stored position and lip is folded)
(
B
)— Platform hinge area (apply oil to top of all
platform hinges when platform is in the
stored position)
(
C
)— Storage prop pins
(
E
)— Lip cylinder pins
• Lubricate the following areas with white lithium
grease:
(
D
)— Hoist cylinder grease fitting and pin
Note:
Apply grease to all hinge grease fittings if
equipped.
Failure to properly lubricate the dock leveler will
cause abnormal operation of the leveler.
•
Check reservoir fluid level (see Figure 28 for SC
models, or page 28 for remote-mount powerpacks):
1. Put the dock leveler in the stored position with
the lip folded.
2. Turn OFF all electrical power to the leveler.
F — Reservoir
G — Hex Plug
H — Fluid Level
3. Lock out and tag out the dock leveler, then
place the maintenance props in their service/down
position with hardware tightened by wrench, and
ensure the storage prop is locked out with the prop
pin and clip.
4. Remove hex plug (
G
). Do not check or fill fluid
through the breather cap.
5. Measure fluid level (
H
). The fluid level should
cover approx. 1/2 of the reservoir sight glass.
6. Add hydraulic fluid if necessary. Use only
recommended fluid (see page 26).
7. Install hex plug (
G
).
8. Raise the maintenance props to the stored
position and tighten all hardware, then remove prop
pin and clip.
9. Turn ON electrical power to the leveler.
10. Return the lip to the raised position.
Yearly Maintenance
• Complete Quarterly Maintenance.
• Change hydraulic oil (may be required more often
depending upon conditions)
.
Figure 28
MAINTENANCE
G
H
F
