DeVillbiss Air Power Company D21684 Troubleshooting Guide, Problem, Cause, Correction, assembly

TROUBLESHOOTING GUIDE

PROBLEM	CAUSE		CORRECTION
No or low pressure (after	1.	Worn seal or packing.	1.	Have replaced by AWSC.
period of normal use.)	2.	Worn or obstructed valves.	2.	Have replaced by AWSC.
	3.	Worn unloader piston.	3.	Have replaced by AWSC.
	4.	Worn E-Z start valve.	4.	Have replaced by AWSC.
Water leaking at gun/wand	1.	Worn o-ring.	1.	Check and replace.
connection	2.	Loose hose connection.	2.	Tighten.
Water leaking at pump	1.	Loose connections.	1.	Tighten.
	2.	Piston packings worn.	2.	Have replaced by AWSC.
	3.	Worn o-rings.	3.	Have replaced by AWSC.
	4.	Pump head or tubes damaged	4.	Have replaced by AWSC.
		from freezing.
Oil leaking at pump	1.	Oil seals worn.	1.	Have replaced by AWSC.
	2.	Loose drain plug.	2.	Tighten.
	3.	Worn drain plug, o-ring	3.	Check and replace.
		(if applicable).
	4.	Worn fill plug o-ring.	4.	Check and replace.
	5.	Pump overfilled.	5.	Check for correct amount.
	6.	Incorrect oil used.	6.	Drain and fill with correct amount and
	7.	Vent plug is clogged.		type of oil.
			7.	Clean vent plug; blow air through it to
				remove any blockage. If problem
				persists, replace plug.
Engine will not idle down	1.	Cable is loose from idle down	1.	Reattach cable.
(if equipped with Idle down		assembly.
assembly)	2.	Piston is separated from stem	2.	Have replaced by AWSC.
		in piston/stem assembly.	3.	Have replaced by AWSC.
	3.	Piston Stem is bent.
			4.	Water supply must be at least 5 GPM @
	4.	Lack of water supply.
				20 PSI
Water leaking from stem on	1.	O-rings damaged in idle body	1.	Have replaced by AWSC.
idle down assembly (if		assembly.	2.	Have replaced by AWSC.
equipped)	2.	Damaged stem.

22 — ENG