Troubleshooting - Stanley MBF5 User Manual

Mounted hydraulic breaker

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Table Of Contents

Table of Contents

This section describes how to find and resolve problems users may experience. If a situation occurs that is not

covered, call your STANLEY Customer Service Representative for assistance.

Inspecting the tool or installing parts with the hydraulic hoses connected can result in severe personal injury

or equipment damage. To prevent accidental startup, disconnect the hydraulic power before beginning any

If symptoms of poor performance develop, the following chart can be used as a guide to correct the problem.

When diagnosing faults in operation of the tool, always check that the hydraulic power source is supplying the

correct hydraulic flow and pressure to the tool as listed in the tool specifications (page 10). Use a flowmeter

known to be accurate. Check the flow with the hydraulic oil temperature at least 80° F/27° C.

PROBLEM

Breaker will not fire.

Breaker runs slowly.

Breaker runs erratically.

Breaker runs but at reduced power.

Breaker leaks oil around tool bit and

tool bushing.

Hydraulic system overheats.

TROUBLESHOOTING

inspection or installation task.

CAUSE

Low hydraulic oil level.

No flow to breaker.

Main relief set low.

Internal damage.

Damaged quick couplers.

Low hydraulic flow.

Excessive heat build up.

Excessive nitrogen pressure.

Internal leakage.

Low or excessive back-pressure.

Damaged switch or connection.

Relief set too low.

Internal damage.

Tool binding.

Low accumulator charge.

Excessive back-pressure.

Relief set too low.

Lower seals failed.

Main relief set low.

Insufficient cooling capability in

hydraulic circuit.

Line/hose size too small.

Excessive back-pressure.

SOLUTION

Fill reservoir.

Have hydraulic circuit tested by

authorized dealer/distributor.