27
4111-0014 — Apr. 2020
© 2020 Systems, LLC
Quarterly Maintenance
• Complete daily and weekly maintenance.
• Clean and lubricate scissors assembly (
A
) and
all pivot points (
K
) with low temp. white lithium
aerosol grease.
• Make sure rear track assist spring (
D
) is properly
seated at the bottom of the rear track.
• Check bumpers for more than 1” of wear.
Replace worn, loose, damaged or missing
bumpers.
• Automatic units only:
Check reservoir fluid level (
O
).
See Figures 27 and 28 for reference.
Failure to clean and properly lubricate the vehicle
restraint will cause abnormal operation.
Yearly Maintenance
• Complete Quarterly Maintenance.
• Automatic units only:
Change hydraulic fluid (varying environmental
conditions may require this more frequently). See
below for list of approved fluids.
Approved Hydraulic Fluids (Automatic units)
To ensure normal operation of the dock leveler and
vehicle restraint, use only aircraft hydraulic fluid
designed to meet or exceed military specification
MIL-H-5606-G. It is recommended that the following
hydraulic fluids be used:
• ULTRA-VIS-HVI-15
• Aero Shell Fluid 4 or Fluid 41
• Mobile Aero HFA Mil-H5606A or Aero HF
• Texaco Aircraft Hydraulic Oil 15 or 5606
• Exxon Univis J13
• Castrol Brayco Micronic 756
These fluid brands can be mixed together. Use of
hydraulic fluids with equivalent specifications to those
listed here are acceptable.
L - Reservoir
M - Breather Cap
N - Fluid Level
Checking Reservoir Fluid Level (Automatic units)
1. Put the vehicle restraint in the stored position.
2. Turn OFF all electrical power to the vehicle
restraint.*
3. Remove Powerpack cover and wipe off reservoir
(
L
) as needed.
4. Measure fluid level (
N
). The fluid level should be
approximately 1 in. (25 mm) from top of reservoir
(
L
) with vehicle restraint stored. See Figure.
5. Add hydraulic fluid if necessary. Use only
recommended fluid (see Approved Hydraulic
Fluids).
6. Reinstall Powerpack cover.
7. Turn ON electrical power.
See Figure 28 for reference.
Figure 28
MAINTENANCE
Periodic Maintenance
A low fluid level, or the use of hydraulic fluids not
equivalent to the fluid types recommended, will
cause abnormal operation of the vehicle restraint
and voiding of warranty.
N
L
M
1 in.
