DeVilbiss JGP-503 CONVENTIONAL Service Bulletin

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__
IEIIILBIIS
The Right Wey To Fini•h"
SERVICE BULLETIN
SB-2-290
Major
~r
Klt KK-4117·2
Minor~
KltKK-6034
JGP-503 CONVENTIONAL SPRAY GUN
JGPV-503 HVLP SPRAY GUN
IMPORTANT: Before uolng this equip- OPERATION
ment, road oil safety precoutlone ond in-
ltructlons. Keep for future use.
DESCRIPTION
Models JGP and JGPV are lightweight,
high production spray guns. JGP models
are conventional air spray, and JGPV are
high volume, low pressure iHVLP). The
gun bodies are constructed of very du·
rable, solvent resistant Verton• (filled ny·
Jon). Fluid passages are constructed of
300 grade stainless steel. Fluid tips and
needles are also 300 grade stainless, and
the fluid tip includes the "soft seat• UHMW
polyethylene insert, for longer service life.
Note
These guns may be used with chlorl·
nated type solvents, but refer to Page
2 for additional warnings.
Important: This gun miiY be ueed with
molt common colltlng and flnlehlng mite-
nolo.
It
is doolgnad for
UIO With
mHdly
corrosive and non .. abrulve materlale. If
used with other highly corrosive or abra ..
olve motoriols, It muot be expected that
frequent and thorough clunlng
wiD
be
roquirad and tho nocesolty for roplecamant
of
parts wiD be Increased.
INSTALLATION
To avoid damage to gun body, do not
overtighten air hose connection at •r
Inlet. UHtwowrencheslfneceiUry.
Attach air hose to 1/4" NPS air inlet fitting
on gun handle. The air inlet fitting includes
a tapered seat and is designed for use with
hose connections containing a similar seat.
If using an NPT typo fitting without a
tapered seat, usa two wrenches to tighten.
Do IIIII overtighten. Sea
CMJtlotr
above.
Attach fluid hose to 3/8" NPS fluid inlet
fitting on gun.
Note
Protective coating and rust Inhibitors
have been used to keep the gun In
good condition prior to shipment.
Before using the gun, flush it with
solvent so that these materials will be
removed from fluid passages.
Strain material through 60 or 90 mesh
screen. Adjust fluid prooaure to deliver the
desired paint volume. Adjust air pressure
and flow to provide a uniform dispersion of
atomized paint throughout the pattern.
Keep air pressure as low as poaaible to
minimize bounce • back and overspray.
Excessive fluid flow will result in heavy
center spray patterns. Inadequate flows
may causa the pattemtospllt. Soo "Trouble-
shooting•, Page 8, if any problems occur.
PREVENTIVE MAINTENANCE
To clean air cap and fluid tip, brush exterior
with a stiff bristle brush. II nocOIHry to
clean cap holes, usa a broom straw or
toothpick. Nev• uae a wire or hard
lnltnJ..
ment. This may scratch or burr holes
causing a distorted spray pattam.
To clean fluid passages, remove excaaa
material at source, than
fiuoh
with a suit-
able solvent using a device ouch ao the
SolventSavar• lsoa Acceosorlool. Wipe
gun exterior with a solvent dampened cloth.
Never completely Immerse in solvent as
this is detrimental to the lubricants and
packings.
Note
When replacing the fluid tip or fluid
needle. replace
.tm1b
at the same
time. Using worn parts can cause
fluid leakage. See Chart 2. Also,
replace the noodle packing
~t
thia
time. Ughtly lubricate the threads of
the fluid tip before reassembling.
Torque to 20-25
ft.
lbs. Do not
overtighten the fluid tip.
Toprovontdo-tothefluldtlpl31
or fluid
-•1281,
be
ouro
to either
11 pull the tri-r end hold while
tightening
or
loounlng tho fluid tip
or
21
remove fluid - e adjuotlng
ocrow
(211
to rollovoopring
-sure
agolnot- collar.
SPRAY GUN LUBRICATION
Daily, apply a drop of SSL-1 0 spray gun
lube at trigger boal'ing stud 1161 and the
stem of the air valva (8) where it enters the
air valve aoHmbly 1121. Tho shenk of the
fluid noodle 1261 whore
~
enters the pock-
ing nut 1141 should aloo be oiled. Tho fluid
noodle packing i 131 should be lubricated
periodically. Make sura the baffle 151 ond
retaining ring 111 threads are clean and free
of foreign matter. Before aesembUng re·
taining ring to baffle, clean the threads
thoroughly, than add two drops of SSL-10
spray gun lube to threads. The fluid noadle
spring 1231 and air valva spring 171 should
be coated with alight grease, making sure
that any excess graaae will not clog the air
passagee. For beat results, lubricate the
polntalndicated, daily.
A. Trigger Points
B. Packing
C. Adjuoting Valves
D. Baffle Threodo
E. Air Valve Cartridge
c