Stanley Black & Decker CT04 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 grinder, always check that the hydraulic power source is supplying the correct hydraulic flow and pressure to the grinder as listed in the table. Use a flowmeter known to be accurate. Check the flow with the hydraulic oil temperature at least 80°F/27°C.

PROBLEM	CAUSE	SOLUTION
Tool does not operate.	Hydraulic hoses not connected	Make sure hoses are connected and
	properly.	the couplers are tight.
	Hydraulic control valve OFF.	Turn the hydraulic system control
		valve ON.
	Hydraulic system not functioning.	Check hydraulic power unit for correct
		flow and pressure.
	Couplers or hoses blocked.	Remove obstruction.
	Pressure port check valve is	Install pressure port check valve in
	installed in tool return port.	pressure port.
Tool operates in reverse (piston	Hoses connected to wrong ports on	Connect input (supply) line to IN port.
advances/retracts when trigger is	tool.	Connect output (return) line to OUT
squeezed).		port.
Tool under-crimps. Die load less	Hydraulic system pressure too low.	Check hydraulic power source for
than 4.4 tons/4000 kg.		correct flow and pressure.
	Relief valve set too low.	Increase relief valve pressure.
	Dirt or obstruction between dies.	Remove obstruction. Clean die area.
	Piston seal worn or damaged.	Contact an authorized Stanley
		distributor.
	Improper die set for wire and	Install proper die set.
	connector.
Tool over-crimps. Die load more	Hydraulic system pressure too high.	Check hydraulic power source for
than 5 tons/4540 kg.		correct flow and pressure.
	Relief valve set too high.	Decrease relief valve pressure.
Trigger difficult to operate.	Hoses connected to wrong ports on	Connect input (supply) line to IN port.
	tool.	Connect output (return) line to OUT
		port.
	Excessive back-pressure.	If back-pressure is greater than
		250 psi/17 bar, clear the return line
		obstruction or restriction.
	Trigger guard bent and binding on	Repair or replace trigger assembly.
	spool in bore.

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