Graco 288466 User manual

Graco Inc. P.O. Box 1441 Minneapolis, MN 55440-1441
Copyright 2007, Graco Inc. is registered to I.S. EN ISO 9001
311845C
Instructions
Displacement Pump
- For portable spray application of architectural paints and coatings -
Model 288466, 288467, 288468, 288819
3300 psi (22.8 MPa, 25 bar) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
Ti8844a
Model 288467/288468
Model 288466
Model 288819

Warnings
2311845C
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 symbol refers to procedure-specific risk. Refer back
to these warnings. Additional, product-specific warnings may be found throughout the body of this manual where
applicable.
WARNING
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
component. 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 forms from distributor or retailer.
• 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.
• 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.
MOVING PARTS HAZARD
Moving parts can pinch or amputate fingers and other body parts.
• Keep clear of moving parts.
• Do not operate equipment with protective guards or covers removed.
• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment,
follow the Pressure Relief Procedure in this manual. Disconnect power or air supply.

Service
311845C 3
Service
Pressure Relief Procedure
1. Engage trigger lock.
2. Turn engine ON/OFF switch to OFF.
3. Move pump switch to OFF and turn pressure control
knob fully clockwise.
4. Unlock trigger lock. Hold metal part of gun firmly to
side of grounded metal pail and trigger gun to
relieve pressure.
5. Engage the trigger lock.
6. Open all fluid drain valves in the system, having a
waste container ready to catch drainage. Leave
drain valve(s) open until you are ready to spray
again.
If you suspect the spray tip or hose is clogged or that
pressure has not been fully relieved after following the
steps above, VERY SLOWLY loosen tip guard retaining
nut or hose end coupling to relieve pressure gradually,
then loosen completely. Clear hose or tip obstruction.
Tools Needed
•Vise
• 12-inch adjustable, open-end wrench (2)
• Hammer, 20 oz. maximum
• Small screwdriver
• Throat Seal Liquid
• Pick or long small screwdriver
Cleaning and Inspecting Parts
• Clean and inspect all parts. Replace worn or dam-
aged parts.
• Remove and clean the sleeve when you are repack-
ing the pump.
The system pressure must be manually relieved to pre-
vent the system from starting or spraying accidentally.
To reduce the risk of an injury from accidental spray
from the gun, splashing fluid, or moving parts, follow
the Pressure Relief Procedure whenever you,
• are instructed to relieve the pressure
• stop spraying
• check or service any of the system equipment
• install or clean the spray nozzle.
Never use a sharp or pointed tool to remove sleeve
or other components which could result in pump rup-
ture and cause serious bodily injury. If the sleeve
cannot be removed easily, return the sleeve and cyl-
inder to an authorized Graco distributor for removal.
Component What to look for
Ball seats in intake valve
and piston
nicks or wear
Inside sleeve worn or scratched
Piston rod worn or scratched

Repair
4311845C
Repair
See your sprayer instruction manual for complete
instructions for removing and installing the pump in your
sprayer.
Disassembly
1. (Fig. 1) Remove packing nut (3).
FIG. 1
2. (Fig. 2) Unscrew intake valve from cylinder.
FIG. 2
3. (Fig. 3) Disassemble intake valve. Clean and
inspect o-ring (17). You may need to use a pick to
remove o-ring.
FIG. 3
4. (Fig. 4) Use a hammer to tap piston rod (5) out of
cylinder (2), or flip pump over and tap piston rod out
against work bench.
FIG. 4
5. (Fig. 5) Remove piston rod (5) from sleeve (4).
FIG. 5
3
ti8845a
ti8846a
Spring (26) for model 288819 is optional and is not
included with the pump.
ti8847b
26
(288467/288468)
17
18
19
16
1
(288819)
26
ti8848a
5
2
ti8849a
4
5

Repair
311845C 5
6. (Fig. 6) Unscrew piston valve (6) from piston rod (5).
Clean and inspect parts. The piston has a special
thread locking/sealing patch. Do not remove the
patch. The patch allows for disassembly/assembly
procedures before it is necessary to apply Loctite®
to the threads.
FIG. 6
7. (Fig. 7) Remove packing and glands from piston
rod. Note orientation for installation.
FIG. 7
8. (Fig. 8) Remove throat packings and glands from
cylinder. Discard throat packings and glands.
FIG. 8
Do not clean or wipe piston valve (6) threads. Clean-
ing the piston valve threads could destroy the special
sealing patch and cause the piston valve to come
loose during operation.
ti8850a
6
5
ti8851a
8
9
6
13
12
10
11
5
ti8853a
21
22
23

Repair
6311845C
Reassembly
Note: For steps 1-4 refer to Fig. 9.
1. Stack male gland (7) on piston rod (5).
2. Alternately stack blue UHMWPE (8) and brown
UHMWPH (9) (288466, 288467, 2884680) or
leather (288819) packings on piston rod.
Note orientation.
3. Install female gland (10).
4. Install backup washer (13) and piston wiper (12) on
piston valve (6). Note orientation.
The special sealing patch on piston valve threads is
good for 4 repackings. Use Loctite®on piston valve
threads after 4 repackings.
FIG. 9
5. (Fig 10) Install ball (11) in piston rod (5). If Loctite®
is applied to piston valve threads, ensure that none
gets on ball.
FIG. 10
6. (Fig. 11) Install piston valve (6) to piston rod (5).
Torque to 55 +/- 3 ft-lb (74.57 +/- 4 N• m).
FIG. 11
ti8854a
13
12
10
7
8
9
5
6
ti8855a
11
5
ti8856a
6
5

Repair
311845C 7
7. Soak all leather packings in SAE 30W oil for 1 hour
minimum prior to assembly.
Note: For steps 8-10 refer to Fig. 12.
8. Place male gland (20) in cylinder.
9. Alternately stack UHMWPE (21) and leather pack-
ings (22). Note orientation.
10. Place female gland (23) in top of cylinder. Seat
packings.
FIG. 12
11. (Fig. 13) Install packing nut (3) into cylinder and
hand tighten.
FIG. 13
12. (Fig. 14) Install o-rings (14) inside cylinder (2) and
on sleeve (4). Slide sleeve (4) into bottom of cylinder
(2). Replace o-ring (15) if desired.
FIG. 14
Note: O-ring (15) is not required for safe pump opera-
tion.
13. (Fig. 15) Grease top inch or two of piston rod (5)
that goes through the sleeve/cylinder assembly
throat packings. Grease piston packings at bottom
of piston pump.
Carefully slide piston assembly (5) into bottom of
sleeve/cylinder assembly (2) until pump rod pro-
trudes out the top and piston packings are totally
inside the sleeve (4).
FIG. 15
CAUTION
Never slide piston assembly (5) into top of sleeve (4)
as this may damage piston packings.
20
23
21 22
ti8857a
288467/
OR
288468
288466
288819
ti8858a
3
2
4
15
14
Place inside cylinder (2)
and push to shoulder
with sleeve (4).
ti8859a
ti8860a
5
15
2
4
ti8860a

Repair
8311845C
14. (Fig. 16) Reassembly intake valve with new o-ring
(17), seat (16) and ball (19). Seat may be flipped
over and used on the other side. Clean seat thor-
oughly.
FIG. 16
15. (Fig. 17) Install intake valve on cylinder. Torque to:
200 +/- 5 ft-lb (271 +/- 7 N•m) 288467/288468, 288819.
110+/- 5 ft-lb (149 +/- 7 N•m) 288466.
FIG. 17
16. Torque packing nut to:
140 +/- 10 in-lb (15 +/- 1 N•m)
288467/288468, 288819 .
125 +/- 10 in-lb (14 +/- 1 N•m)
288466
When pump packings begin to leak, tighten packing
nut down until leakage stops or lessens. This allows
approximately 100 gallons of additional operation
before repacking is required.
Spring (26) for model 288819 is optional and is not
included with the pump.
ti8847b
19
16
17
26
(288467/ 288468)
18
(288819)
26

Parts
311845C 9
Parts
Model 288467/288468
*Included in Repair Kit 287813
† Included in Repair Kit 240918
ti8826a
24
3
25
23
8
21
20
5
11
12
13
6
2
15
14
4
14
18
19
16
17
1
26
7
8
9
10
Ref Part Description Qty
1 15E655 HOUSING 1
2 288482 CYLINDER (model 288467) 1
288483 CYLINDER (model 288468)
3 15J792 NUT, packing 1
4 249121 SLEEVE, cylinder (model 288467) 1
287817 SLEEVE, cylinder (model 288468)
5 288469 ROD, piston (model 288467) 1
288470 ROD, piston (model 288468)
6 249177 VALVE, piston 1
7* 189585 GLAND, packing, male 1
8* PACKING,VEE (blue) 8
9* PACKING,VEE (brown) 3
10* 189588 GLAND, packing, female 1
11* 107203 BALL, valve, check 1
12* 119636 WIPER, piston 1
13* 15J800 WASHER, back up 1
14* 108822 PACKING, o-ring 2
15* 107306 PACKING, o-ring 1
16† 240918 SEAT, carbide 1
17†* 107098 PACKING, o-ring 1
18 198505 GUIDE, ball 1
19†* 107167 BALL,SST 1
20* 15G658 GLAND, male 1
21* PACKING,VEE (leather) 3
23* 15G657 GLAND, female 1
24* 112590 PLUG, throat, seal 1
25* 108832 PACKING, o-ring 1
26* 245256 SPRING, intake ball 1

Parts
10 311845C
Model 288466
*Included in Repair Kit 288471
†Included in Repair Kit 244199
ti8825a
14
4
15
14
2
1
17
16
19
18
6
11
13
12
10
9
8
7
5
5
8
22
10
7
25
3
24
Ref Part Description Qty
1 195894 HOUSING, intake 1
2 288727 CYLINDER 1
3 193032 NUT, packing 1
4 248210 SLEEVE, cylinder 1
5 288479 ROD, piston 1
6 240150 VALVE, piston 1
7* 183178 GLAND, packing, male 2
8* PACKING (blue) 8
9* PACKING,VEE (brown) 3
10* 183185 GLAND, packing, female 2
11* 101947 BALL, bearing 1
12* 118504 WIPER, piston 1
13* 15C998 WASHER, backup 1
14* 107098 PACKING, o-ring 2
15* 106556 PACKING, o-ring 1
16† 244199 SEAT, carbide 1
17† 108526 PACKING, o-ring 1
18 193027 GUIDE, ball 1
19†* 102972 BALL 1
22* PACKING,VEE (leather) 3
24* 183171 PLUG 1
25* 120818 PACKING, o-ring 1