Stanley Black & Decker MBX138 thru MBX608 user manual Troubleshooting, Problem, Cause, Solution

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 breaker, always check that the hydraulic power source is supplying the correct hydraulic flow and pressure to the breaker as listed in the table. Use a flowmeter known to be accurate. Check the flow with the hydraulic oil temperature at least 180 °F/82 °C. An approved test procedure is available in the complete service manual, P/N 41893.

PROBLEM	CAUSE	SOLUTION
Breaker will not fire.	Low hydraulic oil level.	Fill reservoir.
	No flow to breaker.	Have hydraulic circuit tested by
	Main relief set too low.	authorized dealer/distributor per
		approved procedure.
	Internal damage.	Have unit serviced by authorized
		dealer/distributor.
Breaker runs slowly.	Low hydraulic flow.	Have hydraulic circuit tested by
		authorized dealer/distributor per
	Excessive heat build up.
		approved procedure.
	Excessive nitrogen pressure.	Have unit serviced by authorized
	Internal leakage.	dealer/distributor.
Breaker runs erratically.	Low or excessive back pressure.	Have carrier serviced by authorized
	Damaged switch or connection.	dealer/distributor.
	Main relief set too low.
	Internal damage.	Have unit serviced by authorized
	Tool binding.	dealer/distributor.
	Low hydraulic oil level.	Fill reservoir.
Breaker runs but at reduced power.	Low accumulator charge.	Have unit serviced by authorized
	Excessive back pressure.	dealer/distributor.
	Main relief set too low.
Breaker leaks oil around tool bit and	Lower seals failed.	Have unit serviced by authorized
tool bushing.		dealer/distributor.
Hydraulic system overheats.	Main relief set too low.	Have carrier serviced by authorized
		dealer/distributor.
	Insufficient cooling capability in
	hydraulic circuit.
	Line/hose size too small.
	Excessive back pressure.

MAXFORCE BREAKER User Manual ◄ 25