Graco Series A Operating instructions

3A6584A
EN
Repair
Displacement Pump
For professional use only.
3300 psi (22.7 MPa, 227 bar) Maximum Working Pressure
Model 16Y598, Series A
UltraMax II and Ultimate MX II 695/795 STD
GMAX II 3900 STD
SL 1250, Mustang 11500
ASM H3150, Storch ST900
Model 17H828, Series A
TexSpray Mark IV STD
Model 16Y706, Series A
UltraMax II and Ultimate MX II 1095/1595 STD
GMAX II 5900 STD
Model 17H829, Series A
TexSpray Mark V STD and 5900 HD STD
Model 17H830, Series A
TexSpray Mark VII STD
Model 16X423, Series A
GMAX II 7900 STD
Model 17H831, Series A
TexSpray Mark X STD
Model 25E689, Series A
TexSpray 7900 HD STD
Important Safety Instructions
Read all warnings and instructions in this manual
and all related manuals before servicing. Save all
instructions.
ti23116a

Table of Contents
23A6584A
Table of Contents
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pressure Relief Procedure . . . . . . . . . . . . . . . . . . 4
Pump Repair Kits . . . . . . . . . . . . . . . . . . . . . . . . . 4
Tools Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Cleaning and Inspecting Parts . . . . . . . . . . . . . . . 4
Repair When Pump is Separated From Sprayer . 5
Repair When Pump is On Sprayer. . . . . . . . . . . 10
Pump Packings . . . . . . . . . . . . . . . . . . . . . . . . . 15
Parts - Pump 16Y598, 17H828 . . . . . . . . . . . . . . . . 16
Parts - Pump 16Y706, 17H829, 17H830 . . . . . . . . . 17
Parts - Pump 16X423, 17H831, 25E689 . . . . . . . . . 18
Technical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Graco Standard Warranty. . . . . . . . . . . . . . . . . . . . 21

Warnings
3A6584A 3
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation
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
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 Specifications in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical
Specifications in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For
complete information about your material, request Safety Data Sheets (SDSs) 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
manufacturer’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.
MOVING PARTS HAZARD
Moving parts can pinch, cut or amputate fingers and other body parts.
• Keep clear of moving parts.
• Do not operate equipment with protective guards or covers removed.
• Equipment can start without warning. Before checking, moving, or servicing equipment, follow the
Pressure Relief Procedure and disconnect all power sources.
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.

Service
43A6584A
Service
Pressure Relief Procedure
Follow the Pressure Relief Procedure whenever
you see this symbol.
1. Engage trigger lock.
2. Turn ON/OFF switch to OFF. Unplug power cord on
electric units.
3. Disengage the 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 trigger lock.
6. Turn prime valve down until ready to spray again.
7. If you suspect the spray tip or hose is clogged or
that pressure has not been fully relieved after
following the steps above:
a. VERY SLOWLY loosen tip guard retaining nut
or hose end coupling to relieve pressure
gradually.
b. Loosen the nut or the coupling completely.
c. Clear the obstruction int he hose or tip.
Pump Repair Kits
Tools Needed
•Vise
• 12 in. 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 parts. Pay particular attention to the ball
seats in the intake valve and piston, which must have no nicks
or wear, and to the inside of the sleeve and the outside of the
piston rod, which must not be worn or scratched. Replace worn
or damaged parts.
NOTE: Remove and clean sleeve when repacking pump.
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.
Pump Repair Kit
16Y598 17H838
16Y706 17H839
16X423 17H840
17H831 17H848 (Ceramic check balls)
17H828 17H845 (Ceramic check balls)
17H829 17H846 (Ceramic check balls)
17H830 17H847
25E689 17H852 (Ceramic check balls)
NOTICE
To reduce the risk of damaging sealing surfaces, never use
sharp or pointed tools to remove sleeve. If the sleeve cannot
be removed easily, return the sleeve and cylinder to a Graco
distributor for removal.

Service
3A6584A 5
Repair When Pump is Separated
From Sprayer
Disassembling the Pump
1. Remove packing nut (202) and o-ring (228).
2. Unscrew intake valve from cylinder.
3. Disassemble intake valve. Clean and inspect o-ring
(227).
NOTE: A pick may be required to remove o-ring.
NOTE: Spring (233) only used on 17H830, 16X423, and
17H831
4. Tap piston rod out of cylinder with a hammer or flip
over and tap piston rod out against a bench. Sleeve
may come out of cylinder with piston rod.
5. Remove piston rod from sleeve, or remove sleeve
from cylinder. Mark IV and Mark VII models:
Remove sleeve spacer (230) from sleeve.
ti7566a
228
202
ti7569a
NOTE: All Mark
and HD pumps
NOTICE
To reduce the risk of damaging sealing surfaces, never use
sharp or pointed tools to remove sleeve. If the sleeve cannot
be removed easily, return the sleeve and cylinder to a Graco
distributor for removal.
ti7571a

Service
63A6584A
6. Unscrew piston valve from piston rod. Clean and
inspect parts. The piston has a special thread
locking/sealing patch. Do not remove the patch. The
patch allows four disassembly/assembly procedures
before it is necessary to apply thread sealant to the
threads.
7. Remove packings and glands from piston rod.
8. Remove throat packings and glands from cylinder.
Discard throat packings and glands.
Assembling the Pump
1. A) For all non-QuikPak™ Repair Kits.
Soak all leather packings in SAE 30W oil for 1 hour
minimum prior to assembly. Stack male gland (204)
on piston rod. Alternately stack UHMWPE (208) and
leather (218) packings (note orientation) on piston
rod. Install female gland (217). Install piston wiper
(216) (note orientation) and backup washer (229) on
piston valve, threads are good for four repackings.
Use thread sealant on piston valve threads after
four repackings.
B) For all QuikPak Piston Repair Kits (provided
pre-soaked in oil). Note directional arrow on clip.
NOTICE
To avoid damage to pump and sprayer, do not clean or wipe the
piston threads. Cleaning the piston threads could destroy the
special sealing patch and cause the piston to come loose
during operation. Use thread sealant if unsure about the
effectiveness of the thread patch.
ti7576a
ti3940b
Not
used on
16Y598,
17H828
ti7573b
Not
used on
16Y598,
17H828
216
218 208
204
217
210
229
ti7574d
Not
used on
16Y598,
17H828

Service
3A6584A 7
2. Install ball (206) in piston rod. If thread sealant is
applied to piston valve threads, make sure that none
gets on ball.
3. Tighten piston valve to piston rod as specified:
4. A) For all non-QuikPak Repair Kits.
Soak all leather packings in SAE 30W oil for one
hour minimum prior to assembly. Place male gland
(204) in cylinder. Alternately stack UHMWPE (203)
and leather packings (223) (note orientation). Place
female gland (224) in top of cylinder seat packings.
B) For all QuikPak Piston Repair Kits (provided
pre-soaked in oil).
5. Install seal (201) into packing nut (202). Install
o-ring (228) onto packing nut. Loosely install
packing nut into cylinder.
6. Grease piston packings.
NOTE: Do not slide piston assembly into top of sleeve as
this may damage piston packing.
Models Torque
16Y598, 17H828 27 ± 3 ft-lb.(36.6 ± 4.1 N•m)
16Y706, 17H829,
17H830
55 ± 3 ft-lb.(74.6 ± 4.1 N•m)
16X423, 17H831,
25E689
100 ± 5 ft-lb.(136 ± 7 N•m)
ti7575a
206
ti7576a
ti7573f
203
224
223
204
Not
used on
16Y598,
17H828
ti7581a
201
202
228
ti7578c

Service
83A6584A
7. Slide piston assembly (with force) into bottom of
sleeve.
8. Grease top inch or two of piston rod that will go
through the cylinder throat packings.
9. Grease o-rings (221 and 234) and place on sleeve.
Slide sleeve/piston rod assembly into bottom of
cylinder. Replace o-ring (207) if desired.
10. Mark IV and Mark VII models: Install o-ring (231)
on sleeve spacer (232) and install sleeve spacer on
sleeve.
11. Reassemble intake valve with new o-ring (227),
seat (212) and ball (214). Seat may be flipped over
and used on other side. Clean seat thoroughly.
NOTE: Spring (233) only used on 17H830, 16X423, and
17H831.
ti7577a
ti7340a
231
230

Service
3A6584A 9
12. Install intake valve on cylinder. If a wrench is used
torque as follows:
13. Torque packing nut (202) as follows:
14. Remove o-ring (228) when pump packings begin to
leak after extended use. Then tighten packing nut
down until leakage stops or lessens. This allows
approximately 100 gallons of additional operation
before a repacking is required.
Models Torque
16Y598, 17H828 67 ± 5 ft-lb (90.8 ± 6.8 N•m)
16Y706, 17H829,
17H830
80 ± 5 ft-lb (108.5 ± 6.8 N•m)
16X423, 17H831,
25E689
200 ± 15 ft-lb (271.2 ± 20.3 N•m)
Models Torque
16Y598, 17H828, 16Y706, 17H830,
17H829
100 ± 10 in-lb
(11.3 ± 1.1 N•m)
16X423, 17H831, 25E689 140 ± 10 in-lb
(15.8 ± 1.1 N•m)
NOTE: All
Mark and HD
pumps only.
ti7569a
ti7568a
202
228

Service
10 3A6584A
Repair When Pump is On
Sprayer
1. See Pressure Relief Procedure , page 4 .
2. Remove intake valve.
3. Push up retaining spring (26).
4. Push out pin (29). Ensure spring covers pin after
assembly.
5. Disassemble intake valve. Clean and inspect.
O-ring (227) may require a pick for removal.
NOTE: Spring (233) only used on 17H830, 16X423, and
17H831.
6. Remove piston rod and sleeve.
ti4258c
ti4258a
26
29
26
ti4258b
All Mark pumps
ti7746a