Troubleshooting - Stanley MB656 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.

WARNING

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 inspection or installation task.

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

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 table below. Use a flowmeter known to be accurate.

Check the flow with the hydraulic oil temperature at least

80 °F/27 °C.

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 per

approved procedure.