Graco 226-167 SERIES"A, 226-163 SERIES"A, 226-161 SERIES"A manual Preventive Maintenance, 10-11

PREVENTIVE MAINTENANCE

A t least twice dailyand durine any lenethy: interruption of sprayinq, with material pressure relieved: remove and clean gun spray t i p and t i p filter in clean solvent of a type recommended by manufacturer~. of the material beine_ smayed. . .Blow

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parts dry with air pressure. Also k e r s e gun nozzle in clean solvent during shutdown periods.

SHUTDOWN PROCEDURE

To maintain efficient operationof unit, t h i s shutdown procedure a t t h ecompletion of each day's spraying must be diligently followed:

1. Shut o f f a i r t opump by closing pump ON-OFFair control petcock 202-338.See Fig. 1.

Handle is a t r i g h t a n g l e petcocko body when closed.

2.Relieve material pressure inpump, hose and spray gun by opening drump valve of -ifold. This will allow the material trapped in thesystem to drain back into material container. After ma- t e r i a l has stopped draining, remwe and clean

filter cartridgeor screen, if used. Close drain valve.

type		3 .		gun.		spray t i p and f i l t e r , if				used,
			Remove
i'rom		spray				Immerse in			cleanrecornended
		solvent and				wash thoroughly with a fine
bristled			brush.			Using the			air blower valve
205-541attached to								airmanifold 162-376,		blov
a i r	through			t i p		from front			to back and through
open end			of	filter.			Refer to Fig.1. Keep
spray gun			forward end submerged in && re-
cotmuended type..					solvent			until	readyto start
spraying			again. NOTE:					Do not remove the swaq
e m	from dispensine hose unless the unitis t o be
completely flushed. Keeping unit fully charged
with material will							minimize~thenecessity for

flushing u n i t .

m:Water based paints w i l l requke a

,final flushing with solventDAILY and also O i l i n g of all externalmoving pump p a r t s to prevent the rusting of the wetted parts. To completely flush unit follow the procedure outlined in subsequent paragraph entitled FLUSHINC UNIT.

-SERVICEDIAGNOSIS

TROUBLESOME sIMPpOM.5

Fump fails to operate, no material discharge
Pump operates, but insufficient material discharge
Insufficient material breakup
Excessive surge at spray		gun	....................................................
Tails	in spray pattern
Spray	gun spitting		..........................
Too heavy a coating thic.ess			............................

CHECK POINT NOS.

1-3-4-6-6-9 2-4-7-Y,

1-2-9-10-12

1-2-3-4-6-9-11 1-24-6-ll 13

5-10-11

CHECK POINT NO.			mssmm CAUSES				-
l.		Restricted ak. supply line.
2		Insufficient		air	capacity.
3.		Air	valve closed or clogged.				toolow.
L		A i r	regulator	inoperative		or set
5		A i r	regllator	set toohigh.
6		Material too		viscous
7		Insufficient material in container.
e		Clogged materid			intake	strainer .
lo9		Clogged material			filter,	tipor	t i p f i l t e r .
		Hish flow rate-tip orifice too large.
ll		Improper or worn			spray gun tip .
12		Surge chamber inactive, if used.					parts.
l?		Worn, damaged		or	obstructed gun
U	,.
		Worn or obstructed pump valves or packings.

MAINTENANCE

IMPORTANT NOTES

1. Keev unit, mixine container. thinner, solvent. and material CLEAV and free of foreisn particles rbichcould clog strainer screens andl o r plug the small orificein spray tip.

2. Keep	lower vump Assembl-f f i l l e d n i t h
and smav mn head immersed		in recommended type
clean solvent	after f l u s h i n 4	unit and u n t i l

ready tostart sprayine again.

-3. TO reliive - unit Of unnecessary pressure when not in use, shutoff air pressure topump

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and relieve material pressure in system by opening dump valve of manifold or f i l t e r .

4.Daily or ,more often if experience in- dicates necessar d r a i n f i l t e r or surge tank, re- more filter cart:idne or screen. if used, and

~ and close dump valve.

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