Remington 493 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 as-	Remove barrel assembly
	sembled in relation to barrel	(see pages 18-22). Replace
	stop.	all damaged or missing parts.
	Broken piston or piston ring.	Replace piston or piston ring
		or take tool to your distributor.
Overdriven fastener.	Excessive power.	Change either to next lower
		power load or next longer
		length fastener.
Piston jammed.	Overdriving of fastener (see	Remove barrel assembly
	above).	(see pages 18-22). Replace
		other parts if damaged.
Power load strip will	Advance bar or spring dam-	Replace advance bar or
not advance.	aged	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 sear holder and
completely depress.	sear holder and firing pin	check all parts for correct fit
	parts.	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.
Tool does not fire.	Dirt buildup on sear holder	Check firing pin mark on
	not allowing proper penetra-	power load. Clean sear
	tion of firing pin or worn firing	holder, sear and firing pin.
	pin.	Replace worn or damaged
		parts. Notice: Do not attempt
		to clean power load strip
		channel with wire brush. You
		may damage tool.
Opening and closing	Lack of proper cleaning.	Inspect and clean complete
of barrel or pushing		tool. Replace worn or dam-
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.

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