Parts Replacement - Kelley HK-S User Manual

Hydraulic dock leveler with one button control

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User manual (65 pages)

Table Of Contents

Table of Contents

conTroL box TransforMer — 3 PHase onLy

1. When replacing the transformer make sure jumper wires

are installed per wiring diagrams, for appropriate phase

and voltage.

HyDraULic oiL Hoses

1. When removing hydraulic oil hose(s) remove from

motor/pump assembly first then from cylinder assembly.

2. When installing hydraulic oil hose(s) attach to cylinder

first, making sure O-ring is in place, then attach to pump/

motor assembly.

Be certain, before climbing into the dock leveler pit or

doing any maintenance or repair under the dock leveler,

that: 1) THE MAINTENANCE STRUT IS IN POSITION

AND PINNED, LIP LOCK IS IN PLACE AND SUPPORTING

THE LIP [see Fig. 38 on page 34] and 2) the power is

disconnected and properly tagged or locked off.

After replacing hose and/or motor pump assembly, run

pump/motor at least four (4) times with the maintenance

strut and lip lock in place. This is required to remove air

from the system. Check oil level and add oil if required.

Use extreme care when removing maintenance strut

and lip lock. Ramp and lip could move down rapidly if air

remains in the system. Run dock leveler four (4) times

through the complete operating cycle before placing

dock leveler into service.

MoTor/PUMP asseMbLy

1. To set the downward speed of the ramp:

1.1 Loosen needle valve locking nut. See Fig. 47.

1.2 Turn valve in 1/4 turn increments only. "IN" clockwise

will increase time, "OUT" counterclockwise will

decrease time. Tighten needle valve locking nut.

1.3 Raise ramp and lip.

1.4 Time ramp float down time. Ramp should lower to

below dock stop per chart at right.

1.5 Repeat 1.1 through 1.4 until correct.

adjust valve "oUT" in 1/4 turn increments only to

achieve proper lowering time.

March 2014

6004753N — Hydraulic Dock Leveler - One Button Control — Safe