DeVilbiss JGHV-530 Service Bulletin

DEVILBISS

SERVICE

BULLETIN

SB-2-240-C

Replaces

SB-2-240-B

AUTOMOnYE

REFINISHING

PIIODUCiS

Repair

Kil

KK-4987-1

JGHV-530 High Volume

Low Pressure Spray Gun

IMPORTANT:

Before

using

this

equipment,

read all

safety

precautions

and

Instructions.

Retain

lor

fu-

ture

use.

DESCRIPTION

The JGHV-530 is a primary, auto refinish HVLP spray
gun designed to apply a wide variety of finishing

materi-

als. This gun was manufactured to comply

with

SCAQMD

and

other

air

quality

authorities

by limiting the air cap

pressure to

10 psi. This spray gun is intended for use

with pressure feed paint supply only.

The No. 33 air cap and gun is intended for

small

or

partial
jobs. The No. 57 air cap and gun is intended for larger
jobs, completes and fleet refinishing jobs. Refer to the
Air Cap Chart 2

lor

more information.

INSTALLATION

Connect the gun to a clean, moisture and oil tree air
supply using a hose size of at least

5/16"

I.D

. Depending

on hose length, larger

I.

D.

may be required. Install an air

adjusting valve/air gauge,

HAV-501, at the gun handle

and air cap test kit,see

"Accessories", over tip.

For

maximum

gun

pertonmance and

to

assure

code

compliance,

set

the

air

cap

presssure

at10

pslg

or

less. Remove the air cap test kit and install the air cap.
OPERATION

Adjust fluid pressure to deliver the desired paint volume.
As a general rule of thumb, the

following fluid flow and tip

sizes should be

followed.

Tip

Cap

Size

Flow (oz /min.)

DFX

57

.042 10-14

FX

33

.042"

10

GX

33

.034'

6

Excessive flow rates will resutt

in

heavy center spray

patterns.

Inadequate flows may cause the pattern to

split.

See Spray Gun Guide, SB-2-001, for details

concerning set up of spray guns.

HVLP requires gun distances of

6-8" be used. Excess

distance

will produce inferior results.

Strain material thru

60

or

90 mesh screen.

Best atomization

will occur with 10 psig air cap pressure.

However, some materials can be sprayed

at

lower pres-

sures which will result in higher transfer efficiency.

PREVENTIVE

MAINTENANCE

To clean fluid passages, remove excess material at
source, then flush with a suitable solvent.

To clean air cap and

fluid tip, brush exterior wtth a stiff

bristle brush.

If

necessary to clean cap holes, use a

broom straw

or

toothpick.

Never

use a wire

or

hard

Instrument.

This

may

scratch

or

burr holes causing a

distorted spray pattern.

Wipe gun exterior with a solvent dampened cloth. Never
completely immerse in solvent

as

this is detrimental to

the performance and gun

life expectancy, as well

as

destroying the lubricants and packings.

Note

When baffle (6) & fluid

tip

(3) are removed, seal

(4)

and

0-Ring

(27) should

be

replaced. For your convenience,

an extra seal

&

0-Ring

is included wtth this gun.

Be

sure

to

lubricate the

ID

of the baffle and

0-Ring

with SSL-10

gun lube to prevent

0-Ring

damage during installation.

Spray

Gun

Lubrication

Daily, apply a drop of gun lube

at

trigger bearing stud (19)

and the stem

of

the air valve (14) where it enters the

a1r

valve assembly (17). The shank

of

the fluid needle (29)

where

it

enters the packing nut (23) should also

be

oiled.

The fluid needle packing (22) should

be

kept soft and

pliable by periodic lubrication. Make

sure

baffle and

retaining

ring

threads

are

clean

and

tree

of

foreign

matter.

Before

assembling

air

cap

to

baffle, add

one

drop

of

gun

lube

to

threads.

The fluid needle spring (31) should be coated with a light
grease. The air valve spring (15) should be coated with
a very light grease, ensuring that any excess grease

will

not clog the air passages.

For

best results, lubricate the

points indicated, daily.

A. Trigger points
B. Packing

C.

Adjusting valve

D

D.

Baffle & retaining ring threads

E.

Air valve cartridge

©Copyright

1994,

DeVilbiss

Automotive

Refinishing

Products

Page 2 SB-2-240-C

CHART1

1 AIR CAP/TIP APPLICATIONS

-

I

Air

I

Max. Inlet

I

*Pattern I Typical

Gun Model Cap Tip

Pressure

Size

Application

JGHV -530-33GX #33

GX

(.034) 80 7-8" Thin Materials, Base Coats, I

Small/partial

jobs

JGHV -530-33FX

I #33

I

FX

(.042)

80

I

8-9" SmaiVpartial jobs, General

Puroose Base/Clear

JGHV-530-57DFX #57

I

FX

(.042)

65

1 0-12"

Larger jobs, High Flow
Rates. Fleet Refinishino

.

Actual pattern

SIZe

depends upon matenal bemg sprayed,

flUid

flow rate,

a1r

pressure

and

fan

oressure.

CHART2

AIR CAP.& BAFFLE COMBINATIONS

No.Stamped

on Parts

I

Set

I

Air Cap

Ref.

No.2

I

Ref.

No.6

c;FM_';9'
10PSI

Size Baffle

Air

Cap Baffle Cap

33

33-80

JGHV-t01-33

I :GHV-450-33-80

18.5

57 57-65

JGHV-101-57 JGHV-450-57-65

21.0

CHART3

I FLUID TIPS AND NEEDLES

If this

is

No.

on

*Ret

#3

Fluid

Tip

Ref. No. 29

Tip

Order#

Gasket

Assy

Fld. Needle No

on

Needle

AV-2115-FX AV-650-FX JGA-402-FX
AV-2115-GX

AV-650-GX

JGA-402-GX

AV-2125-DFX

--

--

:j:Do

not

use

AV-1

Gasket

w1th

this

gun.

!

CAUTION

J

Order

No

Lapped

Sets

JGA-4040-FX
JGA-4040-GX

JGA-4046-t1

To prevent damage

to

the

fluid

tip

(3)

or

fluid

needle (29), be

sure

to

either

1)

pull

the

trigger

and

hold

while

tightening

the

fluid

lip

or

2)

remove

fluid

needle

adjusting

screw

to

re-

lieve

spring

pressure.

l

CAUTION

]

To avoid

serious

gun

damage,

do

not

remove

the

fluid

tip

(3) from the

spray

gun

when

the

fluid

inlet

adapter

(9)

is

removed. Doing

so

may

allow

the

stainless

steel

insert

to

break

tree

from

the

aluminum

body,

which

is

non-

repairable.

JGHV-116-KS Gasket Replacement

Instructions

1.

Remove fluid inlet adapter

(9)

with appropriate tool.

2. Clean loctite from gun body inlet threads and seat

area.

3.

Place gasket

(7)

squarely into the fluid inlet cavity in

the gun body. Push the gasket

(7)

down with a blunt

object, such

as

a pen or pencil,

to

guide and seat the

gasket squarely into the gun body.

4.

Place a couple of drops of QH-130 (medium strength
blue No. 242 Loctite)

on

threads before installing fluid

inlet adapter (9).

5.

Torque fluid inlet adapter to 10 II. lbs.

and

tighten

locknut (8).

PARTS UST

Ref.

Replacement

Individual

No. Part No. Descriotion

Parts ReQ.

t

MBC-368

Retaining

Ring

for

Ref.

No.

2 t

2

See Chart 1

Air

c¥;

1

3 See

Chart3

Fluid ip

1

4

JGD-14-K10

Seal (Kit of 10( (Polyethylene)

1

5

SSG-8182-K5

·o· Ring (l<it o 5)

1

6

See Chart 2 Baffle, asket & Seal Kit

1

7

JGHV-t16-K5 Gasket (Kit

of

5) Glass filled Teflon) 1

B

-

Locknut

1

9

-

Fluid Inlet Adapter 3/8" NPS

1

10 JGV-444

Fluid Inlet, Nut & Gasket

Kit

1

•1t

-

Snap Ring 1

•12

-

Washer

1

·13

-

·u·

Cup 1

•14

-

Air

Valve

t

•15

-

Spring

1

•t6

JGS-72-K10 Gasket (Kit of

tO~

(Teflon)

2

#t7

JGS-449-1

Air

Valve

Assem

ly

1

•18

-

Screw

1

19

-

T

rig3er

BearinR-

Stud

1

I

20 JGS-478

Stu

& Screw

it

1

(Kit

includes

3

studs

& 5

screws}

21

JGS-477 Trigger, Stud & Screw Kit

1

I

~Kit

mcludes 1 each)

• 22

JGA-4035-KtO acking (Kit of 10) 1

I

23

344tt-122-K10

Fluid Needle Packing Nut (Kit of

tO)

t

24 JGA-132

Plu~

t

I

25

P-MB-St

Air nlet Adapter 1/4" NPS 1

I

•26

-

Retaining

Ring

1

• 27

-

·o·

Ring

(Vitron)

1

28

JGA-497-1

Fan

Adjustment

Assy.

1

I

29

See

Chart 3 Fluid Needle

t

I

30

-

Gun

Bod~

Bushing

t

·31

MBD-19-K10 Spring ( it of 10)

t

32

JGS-16

Fluid

Needle

Adjusting

Screw

1

33

JGA-4041

Bushing,

Spring & Knob

Kit

1

• A quantny of necessary parts

is

included

in

Gun Repair

Ktt

KK-4987-1 which should be kept on hand for service

convenience.

# Use JGS-449-1 valve assembly only.

Do

LlQt

use JGS-

449. Pressure drop will occur.
Note

All

wetted suriaces are stainless steel

and

may

be

used

with materials

formulated with chlorinated solvents.