Troubleshooting Guide - 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

Be certain, before climbing into the dock leveler pit or

doing any maintenance or repair under the dock leveler,

that: 1) THE MAINTENANCE STRUT AND LIP LOCK ARE

SECURELY IN PLACE, [see Fig. 38} and 2) the power is

disconnected and properly tagged or locked off.

Before servicing the dock leveler, read and follow the

Safety Practices on page 3 and the Operation section of

this manual.

raMP faiLs To raise:

1. If motor fails to run:

1.1 Check that all cords are wired into the junction box.

1.2 Check for electrical power to the control box.

1.3 Check "ON/OFF" switch on control box.

Before doing any electrical work, make certain the power

is disconnected and properly tagged or locked off.

1.4 Check for loose wires in control box.

1.5 Check fuses. Replace if required.

1.6 If problem can not be found, contact a qualified

electrician.

2. If motor runs:

2.1 Check hydraulic oil level in reservoir. Add if

required. See Fig. 39 for proper levels and types of

oil to be used.

2.2 Check for loose hydraulic hose fittings or broken

hoses. Repair or replace as required.

2.3 Check for binding in ramp cylinder pivots.

2.4 Check hydraulic bypass pressure and adjust as

required. See Fig. 40.

LiP faiLs To exTenD:

1. Check for damage to lip cylinder and/or pivot pins.

2. Check for leakage in lip cylinder or hydraulic hose

feeding cylinder.

3. Check for binding in lip hinge.

4. Check hydraulic oil level in reservoir. Add if required.

See Fig. 39.

5. Check hydraulic bypass pressure and adjust as required.

See Fig. 40.

6. Check lip sequence valve pressure setting. See Fig. 41.

March 2014

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