Rite-Hite Dock Leveler RHH-4000

Check oil level before making any adjustments

Adjustment for High Sequence Valve Setting

Is the leveler fully raised and the lip does not extend?

Remove protective cap and O-ring

Loosen locknut without turning valve body or adjustment screw

Turn adjustment screw counterclockwise to lower the valve pressure setting (1/8 turn increments)

Tighten locknut without turning valve body or adjustment screw

Reinstall O-ring and protective cap and tighten cap

Post safety warnings and barricade work area at dock level and ground level

Install the Safe-T-StrutTM before proceeding with any repair work

Remove debris on and around leveler

Ensure the hinge section of the lip and the platform is clean

Check unit for proper operation

Include specific steps for your leveler model

Check oil level before making any adjustments

Adjust leveler to lower from full raised position with lip extended to the header stops in the proper time frame

Press RAISE button and run the platform up until the lip extends

Release RAISE button and allow the platform to fall completely below dock and stop

Verify with a stopwatch that the platform falls according to the times in step 1

Check oil level before making any adjustments

Valve Position Illustrated Represents The Nominal Factory Setting Of 3-1/2 Turns Out From The Fully Turned In Position

Adjust Hydra-RiteTM to lower from full raised position with lip extended to the header stops in less than 20 seconds

Adjust Base to lower from full raised position with lip extended to the header stops in 8 to 12 seconds

Remove protective cap and O-ring

Loosen locknut without turning valve body or adjustment screw

Turn adjustment screw to vary platform lowering speed

Tighten adjustment screw to decrease platform speed while lowering

ARTD Limit Switch Cam Adjustment

Ensure the lip stop bolt is properly adjusted. See page 13.

Raise leveler and install a strut securely behind the header or mini-header to allow the lip to hang pendant and rest against the lip stop bolt.

Adjust collars so the front edge of ARTD cam is 1/16” behind the centerline of the ARTD limit switch. See figure 14.

Tighten front collar while holding the 1/16” adjustment.

Push the rear collar forward as much as possible and tighten. Ensure ARTD cam assembly rotates freely.