Poweramp PR SERIES HYDRAULIC 4.2009 Manuel d'utilisateur télécharger pdf (Page 31)

ADJUSTMENTS

4111-0001 — Oct.2007

To adjust the main pressure relief:

1. Raise the platform fully and engage the

maintenance prop in the service position.

2. Turn OFF all electrical power to the dock leveler.

Attach safety lockout and tagout devices.

3. Remove acorn nut (F).

4. Loosen jam nut (E).

5. Adjust hex adjusting screw (D) as follows:

• Turn clockwise to increase pressure relief.

• Turn counterclockwise to decrease pressure

relief.

6. Tighten the jam nut and install the acorn nut.

7. Turn ON electrical power to the dock leveler.

8. Disengage the maintenance prop.

9. Check leveler operation.

10. Repeat steps 1– 9 as necessary.

A— Reservoir

B— Main Pressure Relief

C— Pump/Motor

D—Hex Adjusting Screw

E— Jam Nut

F— Acorn Nut

Adjust Main Pressure Relief

NOTE: The main pressure relief may need to be

increased if the platform does not rise or

rises slowly and the system operates in

pressure relief mode. See Troubleshooting

section.

The main pressure relief may need to be

decreased if the pump motor loads down

when platform reaches the full raised

position. See Troubleshooting section.

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.

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Poweramp PR SERIES HYDRAULIC 4.2009 Manuel d'utilisateur Page 31

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