Graco XHF Parts list manual

3A2799C
EN
Instructions - Parts
XHF Spray Gun
For spraying viscous materials at high flow rates. For professional use only.
Part No. 262854, Series A
Includes an XHD™RAC®Guard and XHD429 SwitchTip™
7250 psi (50 MPa, 500 bar) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions in this
manual. Save all instructions.
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23A2799C
Contents
Warnings .................................3
Operation .................................5
System Requirements .....................5
Ground the System .......................5
Gun Trigger Lock ........................5
Pressure Relief Procedure .................5
Operation ..............................6
AdjusttheSprayPattern ...................6
GunCare ..............................7
FlushtheGun ..........................8
Service ...................................9
Disassembly for Repair or Cleaning ..........9
Reassembly ...........................10
Test the Gun After Service ................12
Parts ....................................13
Accessories ..............................14
Technical Data ............................ 15
Graco Standard Warranty ...................16
GracoInformation .........................16

Warnings
3A2799C 3
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama-
tion point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When
these symbols appear in the body of this manual or on warning labels, refer back to these Warnings. Product-specific
hazard symbols and warnings not covered in this section may appear throughout the body of this manual where
applicable.
WARNING
SKIN INJECTION HAZARD
High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin. This may look like just
a cut, but it is a serious injury that can result in amputation. Get immediate surgical treatment.
• Do not spray without tip guard and trigger guard installed.
• Engage trigger lock when not spraying.
• Do not point gun at anyone or at any part of the body.
• Do not put your hand over the spray tip.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Follow the Pressure Relief Procedure when you stop spraying and before cleaning, checking, or
servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses and couplings daily. Replace worn or damaged parts immediately.
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent
fire and explosion:
• Use equipment only in well ventilated area.
• Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic drop
cloths (potential static arc).
• Keep work area free of debris, including solvent, rags and gasoline.
• Do not plug or unplug power cords, or turn power or light switches on or off when flammable fumes
are present.
• Ground all equipment in the work area. See Grounding instructions.
• Use only grounded hoses.
• Hold gun firmly to side of grounded pail when triggering into pail. Do not use pail liners unless they
are antistatic or conductive.
•Stop operation immediately if static sparking occurs or you feel a shock.Do not use equipment
until you identify and correct the problem.
• Keep a working fire extinguisher in the work area.

Warnings
43A2799C
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated system com-
ponent. See Technical Data in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all
equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information
about your material, request MSDS from distributor or retailer.
• Do not leave the work area while equipment is energized or under pressure.
• Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manu-
facturer’s replacement parts only.
• Do not alter or modify equipment. Alterations or modifications may void agency approvals and create
safety hazards.
• Make sure all equipment is rated and approved for the environment in which you are using it.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
RECOIL HAZARD
Gun may recoil when triggered. If you are not standing securely, you could fall and be seriously injured.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or
swallowed.
• Read MSDSs to know the specific hazards of the fluids you are using.
• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury, including
eye injury, hearing loss, inhalation of toxic fumes, and burns. This protective equipment includes but is
not limited to:
• Protective eyewear, and hearing protection.
• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer
WARNING

Operation
3A2799C 5
Operation
Keep the wallet-sized warning card provided with this
gun with the operator at all times. The card contains
important treatment information should an injection
injury occur. Additional cards (part no. 222385) are
available at no charge from Graco.
System Requirements
Pressure drain valves are recommended in the system;
they assist in relieving fluid pressure in the displacement
pump, hose and gun in the event that the gun is clogged
and triggering the gun does not relieve all pressure.
Ground the System
Ground the pump and all other equipment used or
located in the spray area. Check your local electrical
code for detailed grounding instructions for your area
and type of equipment. Follow the grounding instruc-
tions provided in your pump or sprayer manual. Ground
the gun through connection to a properly grounded fluid
hose and pump or sprayer.
Gun Trigger Lock
1. To engage the gun trigger lock, rotate the lock so it
is perpendicular to the gun body. See FIG.1.
2. To disengage the gun trigger lock, push the lock out
and rotate it so it is parallel with the gun body. See
FIG.1.
Pressure Relief Procedure
Follow the Pressure Relief Procedure whenever
you see this symbol.
1. Engage the gun trigger lock.
2. Shut off power to the pump.
3. Disengage the gun trigger lock.
4. Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun to relieve pressure.
5. Engage the gun trigger lock.
6. Open the system drain valve, having a container
ready to catch the drainage. Observe the pressure
gauge. The gauge reads 0 psi/bar when fully
drained. Close the system drain valve.
7. If you suspect that the spray tip or hose is com-
pletely clogged or that pressure has not been fully
relieved after following the previous steps, very
slowly loosen the tip guard retaining nut or hose end
coupling to relieve pressure gradually. Clean the tip
or hose obstruction.
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes to
ignite or explode. Grounding provides an escape wire
for the electric current.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing
fluid and moving parts, follow the Pressure Relief
Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.
FIG. 1: Trigger Lock Positions
Locked Unlocked
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Operation
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Operation
1. Connect a fluid hose (A) to the gun inlet. Use swivel
207946 or 24P834 if desired (order separately). See
Fig. 2.
2. With SwitchTip (8) and tip guard (9) removed, start
the pump. Flush the pump according to the instruc-
tions supplied with it. Use the lowest pressure possi-
ble.
3. Prime the system with the material.
4. Relieve pressure.
5. Install the SwitchTip (8) and tip guard (9). See FIG.
2.
6. Start the pump. Trigger the gun onto test paper.
Adjust the fluid pressure until the spray is com-
pletely atomized. Use the lowest pressure neces-
sary to get the desired results. Higher pressure may
not improve the spray pattern and will cause prema-
ture tip and pump wear.
7. If adjusting the pressure does not give a good spray
pattern, relieve pressure and try another tip size.
8. Use a full-open, full-close trigger action. Hold the
gun about 14 in. (350 mm) from and at right angles
to the work surface. Don’t swing the gun in an arc.
Practice to find the best length and speed of stroke.
Adjust the Spray Pattern
1. To adjust the spray pattern direction, relieve pres-
sure. Loosen the tip guard retaining nut (B). Rotate
the tip guard as necessary to achieve a vertical or
horizontal spray pattern. See FIG. 3. Tighten the nut.
2. The spray tip orifice and spray angle determines the
coverage and size of pattern. When more coverage
is needed, use a larger spray tip rather than increas-
ing fluid pressure.
To reduce the risk of component rupture, and serious
injury, including fluid injection, do not exceed the
gun’s 7250 psi (500 bar, 50 MPa) maximum working
pressure or the maximum working pressure of lowest
rated component in the system.
FIG.2
A
9
8
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Swivel
NOTICE
Openings in the tip guard reduce material buildup on
the guard while spraying. Damage to the sharp edges
of the openings causes material to collect in the dam-
aged area. To prevent this, never hang the gun by the
tip guard.
FIG.3
ABC
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Operation
3A2799C 7
Gun Care
Cleaning during the day
1. Relieve pressure, page 5.
2. Use a solvent-soaked brush to clean the spray tip.
Clean the front of the tip frequently during the day to
help reduce buildup.
3. Clean the tip and tip guard at the end of each work
day.
If the spray tip clogs while spraying
1. Stop spraying immediately.
2. Lock the gun trigger lock. Rotate the RAC SwitchTip
handle 180°. See Fig. 4.
3. Unlock the gun trigger lock. Trigger the gun into a
pail or onto the ground to remove the clog.
4. Lock the gun trigger lock. Rotate the tip handle back
to the spraying position.
5. If the tip is still clogged:
a. Engage the gun trigger lock.
b. Shut off the sprayer and disconnect the power
source.
c. Open the pressure drain valve to relieve pres-
sure.
d. Clean the spray tip as shown in manual 308644,
supplied with the RAC SwitchTip.
• To reduce the risk of fluid injection or splashing in
the eyes or on the skin, do not point gun at
anyone or at any part of the body when cleaning
or checking a clogged tip. Point the gun toward
the ground or into a waste container when
checking to see if the spray tip is cleared.
• Do not try to “blow back” material; this is not an
air spray gun.
• Do not wipe fluid buildup off the gun or spray tip
until pressure is relieved.
NOTICE
Never soak the entire gun in solvent. Prolonged expo-
sure to solvent can ruin the packings.
FIG.4
Spraying position shown. Rotate tip handle 180° and
trigger gun to clear clog.
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Operation
83A2799C
Flush the Gun
NOTE: This procedure requires a grounded pail of com-
patible flushing fluid.
1. Relieve pressure.
2. Remove the tip guard and spray tip. Soak and clean
the parts.
3. Single component systems only: Remove the pump
intake from the original pail. Put the pump intake in
a grounded pail of compatible solvent.
4. Start the pump at its lowest pressure.
5. Single component systems only: Trigger the gun
into the original pail. When flushing fluid appears,
release the trigger.
6. Two-component systems only: Trigger the gun into
a waste container. When flushing fluid appears
release the trigger.
7. Now trigger the gun into the flushing fluid supply
pail. Circulate the fluid until the system is thoroughly
flushed.
8. After gun is thoroughly flushed, relieve pressure.
To reduce the risk of serious injury, including splashing
fluid in the eyes or on the skin, or static electric dis-
charge when flushing:
• Be sure the entire system, including flushing pails,
is properly grounded.
• Remove the tip guard and spray tip.
• Maintain metal to metal contact between the gun
and the flushing pail.
• Use the lowest possible pressure.
NOTICE
Always flush the pump and gun before the sprayed
fluid cures.
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Service
3A2799C 9
Service
Disassembly for Repair or
Cleaning
NOTE: If replacing only the needle and seat, step 4 and
5 are not required. However, removing them allows you
to clean the gun more thoroughly.
1. Relieve pressure.
2. Disconnect the fluid hose (A) and swivel (if used).
Remove the tip guard (9). Unscrew the spring screw
(21) about 1/4 in. (7 mm) to release spring tension.
See FIG.5.
3. Unscrew the valve seat (2a). Remove the
gasket (2b). See FIG.6.
4. Remove one e-clip (26) then push the pin (18) out of
the gun. Remove the screw (13), pivot pin (23), and
trigger (24). See FIG.7.
To reduce the risk of serious injury from fluid injection
or splashing, always follow the Pressure Relief Proce-
dure on page 5 before servicing the gun.
FIG.5
9
21
A
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Swivel
FIG.6
FIG.7
2b
2a
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18
13
24 26
23
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26

Service
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5. Loosen the setscrew (15) then remove the fluid
housing (22) from the gun body (1). See FIG.8.
6. While supporting the spring guide (16) to prevent
bending the needle (2c), loosen the setscrews (17)
then remove the spring guide (16). See FIG.9.
7. Remove the needle (2c). Unscrew the seal
retainer (2d) then remove the seal (2e). See FIG.10.
8. Clean all parts and cavities thoroughly with a com-
patible flushing fluid. Dry with a rag or compressed
air. Replace any parts that are worn or damaged.
Reassembly
1. Lightly grease the inner cavities of the fluid
housing (22). Install the small seal (2e) so the lips
face into the fluid housing cavity. Install the seal
retainer (2d) and torque to 30-40 in-lb (3.4-4.5 N•m).
See FIG.11.
2. Lightly grease the small end of the needle (2c) then
guide it into the large end of the fluid housing (22).
See FIG.12.
FIG.8
FIG.9
FIG.10
1
22
15
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17
16
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2c
2d
2e
2c
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FIG.11
FIG.12
2d
2e
22
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2c
22
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