Desa 496 operating instructions Troubleshooting Guide, Problem Possible Cause Remedy

Troubleshooting Guide

PROBLEM	POSSIBLE CAUSE	REMEDY
Piston hangs out	Tool overdriven.	Tap piston on hard surface
of muzzle.		until piston is pushed back
		into the guide. (See Over-
		driven Fastener below)
	Piston not properly	Remove barrel assembly
	assembled in relation to	(see pages 18-20). Replace
	stop.	all damaged or missing parts.
	Broken piston or piston ring.	Replace piston or piston ring
		or take tool to your distributor.
Overdriven	Excessive power.	Change either to next lower
fastener.		power load or next longer
		length fastener.
Piston jammed.	Overdriving of fastener (see	Remove barrel assembly
	above).	(see pages 18-20). Replace
		other parts if damaged.
Power load strip will	Advance bar or spring	Replace advance bar or
not advance.	damaged	springs.
	Tool dirty.	Clean tool. Notice: Do not
		attempt to clean power load
		strip channel with wire brush.
		You may damage tool.
Reduction or loss	Piston not returning to full	Barrel must be opened to the
of power.	rear position.	full extended position to
		properly position piston.
	Worn piston ring or broken	Replace piston and/or piston
	piston.	ring or take tool to your dis-
		tributor.
Tool does not	Misassembled or damaged	Remove firing pin guide and
completely depress.	sear, firing pin parts, or	check all parts for correct fit
	guide.	assembly.
Tool does not fire.	Failure of tool to depress	See data listed under Tool
	completely.	does not completely de-
		press, above.
	Piston not fully reset.	Fully reset piston. See step 1
		under Operation, page 14.
	Dirt buildup on sear not	Check firing pin mark on
	allowing proper penetration	power load. Clean firing pin
	of firing pin or worn firing	guide, sear and firing pin. Re-
	pin.	place worn or damaged
		parts. Notice: Do not attempt
		to clean power load strip
		channel with wire brush. You
		may damage tool.
Opening and clos-	Lack of proper cleaning.	Inspect and clean complete
ing of barrel or		tool. Replace worn or dam-
pushing down on		aged parts. Notice: Do not
tool, etc. is not		attempt to clean power load
smooth but is		strip channel with wire brush.
rough or binds.		You may damage tool.
		105635

24