DLM HED Series, Owner & User Manual

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34
Manual No. 4111-0027
Sept. 2009
May 2012
34
ADJUSTMENTS
Adjust Lip Function
1. Raise platform fully and engage the maintenance
prop in the service position. Allow platform to rest
on the prop so the lip will fully fold until it contacts
the lip stops.
2. Turn OFF all electrical power to the dock leveler.
Attach safety lockout and tagout devices.
When service under the dock leveler is required,
always lock all electrical disconnects in the OFF
position after raising the platform and engaging the
maintenance prop. Failure to do this may result in
serious personal injury or death.
Always post safety warnings and barricade the
work area at dock level and ground level to prevent
unauthorized use of the dock leveler before
maintenance is complete. Failure to do this may
result in serious personal injury or death.
Always stand clear of the dock leveler lip when
working in front of the dock leveler.
The maintenance prop MUST be in the service
position when working under the dock leveler.
For maximum protection, use an OSHA approved
locking device to lock the maintenance prop in
the service position. Only the person servicing
the equipment should have the key to unlock the
maintenance prop.
Unless the dock leveler is equipped with a tethered
remote, two people are required to engage the
maintenance prop: one person to operate the unit,
the other person to engage the maintenance prop.
Failure to follow these instructions may result in
serious personal injury or death.
Notes :
1. Relief valve is factory set at 1500 PSI. This valve is
main system relief.
2. Relief valve adjustment:
• Loosen jam nut.
• Turn screw clockwise to increase pressure.
• Turn screw counter clockwise to decrease
pressure.
• Tighten jam nut.
3. Sequence valve is factory set at 750 PSI. Turn
clockwise to increase pressure, turn counter
clockwise to decrease pressure. This valve
normally should not need adjustment.
4. See trouble shooting section for further adjustment
procedures.
Troubleshooting :
1. If lip opens as platform begins to rise, turn sequence
valve clockwise in 1/4 turn increments.
2. If lip will not fully retract when recycling platform to
stored position, turn sequence valve clockwise in
1/8 turn increments.
Note: All adjustments should be made in small
increments, and should be charted to have reliable
information when back tracking through adjustments.