Graco Dura-Flo 600 Parts list manual

Instructions - Parts
Dura-Flo™Lowers
Stainless steel lowers with severe-duty rod and cylinder used for spray or transfer of
common industrial coatings and adhesives. For professional use only.
Dura-Flo 600 (145 cc) Lowers
Dura-Flo 750 (180 cc) Lowers
Dura-Flo 900 (220 cc) Lowers
Dura-Flo 1200 (290 cc) Lowers
See page 2 for model information, including maximum working pressure.
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
TI8343a
311827G
EN

Models
2311827G
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pressure Relief Procedure . . . . . . . . . . . . . . . . . 5
Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Dura-Flo 600 (145 cc) and Dura-Flo 750 (180 cc)
Lowers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Dura-Flo 900 (220 cc) Lowers . . . . . . . . . . . . . . 12
Dura-Flo 1200 (290 cc) Lowers . . . . . . . . . . . . . 13
Repair Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Leather Packings with PTFE Backup . . . . . . . . 14
PTFE Packings . . . . . . . . . . . . . . . . . . . . . . . . . 15
UHMWPE and PTFE Packings . . . . . . . . . . . . . 16
UHMWPE and Leather Packings . . . . . . . . . . . . 17
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 20
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 20
Models
* This lower can be connected only to NXT®2200 size motors.
Lower
Part No. Series Model Packing Stacks
Maximum Fluid
Working Pressure
247168* A Dura-Flo 600 (145 cc) 4 leather/1 PTFE backup 41 MPa (414 bar, 6000 psi)
241177 A Dura-Flo 600 (145 cc) 3 UHMWPE/2 PTFE 41 MPa (414 bar, 6000 psi)
236458 A Dura-Flo 600 (145 cc) 4 leather/1 PTFE backup 41 MPa (414 bar, 6000 psi)
L14BSS A Dura-Flo 600 (145 cc) 3 UHMWPE/2 PTFE 41 MPa (414 bar, 6000 psi)
L145SS A Dura-Flo 600 (145 cc) 3 UHMWPE/2 PTFE 41 MPa (414 bar, 6000 psi)
236456 B Dura-Flo 750 (180 cc) 4 leather/1 PTFE backup 47 MPa (469 bar, 6800 psi)
261657* A Dura-Flo 750 (180 cc) 4 leather/1 PTFE backup 47 MPa (469 bar, 6800 psi)
L180SS A Dura-Flo 750 (180 cc) 3 UHMWPE/2 PTFE 47 MPa (469 bar, 6800 psi)
247190* A Dura-Flo 900 (220 cc) 4 leather/1 PTFE backup 41 MPa (414 bar, 6000 psi)
236470 A Dura-Flo 900 (220 cc) 4 leather/1 PTFE backup 41 MPa (414 bar, 6000 psi)
248816 A Dura-Flo 900 (220 cc) 5 UHMWPE throat/5 PTFE piston 41 MPa (414 bar, 6000 psi)
236897 A Dura-Flo 900 (220 cc) 5 PTFE 41 MPa (414 bar, 6000 psi)
L22BSS A Dura-Flo 900 (220 cc) 3 UHMWPE/2 PTFE 41 MPa (414 bar, 6000 psi)
L220SS A Dura-Flo 900 (220 cc) 3 UHMWPE/2 PTFE 41 MPa (414 bar, 6000 psi)
247192* A Dura-Flo 1200 (290 cc) 4 leather/1 PTFE backup 41 MPa (414 bar, 6000 psi)
237514 A Dura-Flo 1200 (290 cc) 4 leather/1 PTFE backup 41 MPa (414 bar, 6000 psi)
237515 A Dura-Flo 1200 (290 cc) 3 UHMWPE/2 leather 41 MPa (414 bar, 6000 psi)
236490 A Dura-Flo 1200 (290 cc) 5 PTFE 41 MPa (414 bar, 6000 psi)
L290SS A Dura-Flo 1200 (290 cc) 3 UHMWPE/2 PTFE 41 MPa (414 bar, 6000 psi)
24B923 A Dura-Flo 1200 (290 cc) 3 UHMWPE/2 CF-PTFE 41 MPa (414 bar, 6000 psi)

Warnings
311827G 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 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
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.
• If there is static sparking or you feel a shock, stop operation immediately. Do not use equipment
until you identify and correct the problem.
• Keep a working fire extinguisher in the work area.
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 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.
• Do not spray without tip guard and trigger guard installed.
• Engage trigger lock when not spraying.
• Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning,
checking, or servicing equipment.
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.

Warnings
4311827G
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.
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 MSDS’s 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.
• Always wear impervious gloves when spraying or cleaning equipment.
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing, or when in the operating
area of the equipment to help protect you from serious injury, including eye injury, inhalation of toxic
fumes, burns, and hearing loss. This equipment includes but is not limited to:
• Protective eyewear
• Clothing and respirator as recommended by the fluid and solvent manufacturer
•Gloves
• Hearing protection
WARNING

Repair
311827G 5
Repair
Pressure Relief Procedure
1. Engage the trigger lock.
2. Shutoff the pump:
a. For air-powered pumps, close the bleed-type
master air valve.
b. For hydraulic-powered pumps, close the supply
line shutoff valve first, then close the return line
shutoff valve.
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. 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.
7. If you suspect the spray tip or hose is clogged or
that pressure has not been fully relieved after follow-
ing 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.
Required Tools
• Set of adjustable wrenches
• Large pipe wrench
• 2-5/8 in. wrench
• Torque wrench
• Rubber mallet
• O-ring pick
•Largevise
• Thread lubricant
• Thread sealant
Disassembly
Lay out all the removed parts in sequence, to ease reas-
sembly.
1. Flush the pump, if possible. Stop the pump at the
bottom of its stroke. Relieve the pressure, page 5.
2. Disconnect the lower from the motor. See your sep-
arate pump assembly manual.
3. Place the lower lengthwise in a large vise, with the
jaws on the outlet housing (7) as shown in FIG. 1, or
on the cylinder (8) flats. Loosen, but do not remove,
the packing nut (2).
4. Unscrew the intake valve (18). Be careful to catch
the intake ball (17) as you remove the intake valve
so it does not fall and suffer damage. Remove the
seal (30). Inspect the ball and seat (D) for wear or
damage.
Trapped pressure can cause the pump to cycle unex-
pectedly, which could result in serious injury from
splashing or moving parts.
Packing Repair Kits are available. For the best
results, use all the new parts in the kit. Kit parts are
marked with an asterisk, for example (3*). These
kits can also be used to convert the lower to differ-
ent packing materials. See pages 14-17.

Repair
6311827G
5. Unscrew the intake housing (16). The lower assem-
bly may separate at joint A or joint B.
• If the assembly separates at joint A:
a. Hold the cylinder (8) flats with a wrench and
unscrew the intake housing (16).
b. For Dura-Flo 900 and 1200 Lowers: Using a
rubber mallet, drive the rod (1) and piston
assembly out of the outlet housing (7) and cylin-
der (8) until the piston comes free. Pull the rod
and piston from the cylinder, being careful not to
scratch the parts.
For Dura-Flo 600 and 750 Lowers: Turn the cyl-
inder (8) upside down and strike the top of the
rod (1) on a plastic or wooden block until the
piston comes free. Pull the rod and piston from
the cylinder, being careful not to scratch the
parts. See the Detail in FIG. 1.
c. Using a wrench on the cylinder (8) flats,
unscrew the cylinder from the outlet housing (7).
Remove the cylinder seals (24). Shine a light
into the cylinder to inspect the inner surface for
scoring or wear. Now go to step 6.
• If the assembly separates at joint B:
a. Unscrew the cylinder (8) and intake housing
(16) from the outlet housing (7). Carefully pull
the cylinder and intake housing straight out of
the outlet housing. The displacement rod (1)
and piston assembly will come out with these
parts.
b. Place the intake housing (16) in a vise. Using a
wrench on the cylinder (8) flats, unscrew the cyl-
inder. The rod (1) and piston assembly will
remain in the cylinder.
c. For Dura-Flo 900 and 1200 Lowers: Using a
rubber mallet, drive the rod (1) and piston
assembly out of the outlet housing (7) and cylin-
der (8) until the piston comes free. Pull the rod
and piston from the cylinder, being careful not to
scratch the parts.
For Dura-Flo 600 and 750 Lowers: Tu r n t he c yl -
inder (8) upside down and strike the top of the
rod (1) on a plastic or wooden block until the
piston comes free. Pull the rod and piston from
the cylinder, being careful not to scratch the
parts. See the Detail in FIG. 1.
d. Remove the cylinder seals (24). Shine a light
into the cylinder to inspect the inner surface for
scoring or wear. Now go to step 6.
6. Place the piston flats (15) in a vise. See FIG. 2.
7. Unscrew the piston ball guide (9) from the piston. Be
careful to catch the piston ball (10) as you separate
the parts, so it does not fall and suffer damage.
8. Examine the displacement rod (1) for scratches and
other damage. Only if the rod needs replacement,
unscrew it from the piston ball guide (9), using a
wrench on the flats of the rod.
9. Remove the piston glands and v-packings (P).
Inspect the ball (10), seat (E), and guides (F) on the
ball guide for wear or damage.
10. See FIG. 4. Unscrew the packing nut (2). Remove
the throat packings (T) from the outlet housing (7).
11. Clean all parts with a compatible solvent and
inspect them for wear or damage.
CAUTION
To reduce the possibility of costly damage to the rod
(1) and cylinder (8), always use a rubber mallet to
drive the rod out of the cylinder. Never use a hammer
to drive the rod.

Repair
311827G 7
FIG. 1
TI8360a
1
2
7B8A
16
30
17
18
D
4518
Detail
Dura-Flo 600 and 750 Lowers
18
Torque to 325-353 N•m (240-260 ft-lb).
Lubricate.
Torque to 190-217 N•m (140-160 ft-lb).
1
2
3
1
2
3
1
FIG. 2
TI8362a
1
9
15
1
9
10
E
F
15
Dura-Flo 600 and 750: Torque to 258-285 N•m (190-210 ft-lb).
Dura-Flo 900: Torque to 271-298 N•m (200-220 ft-lb).
Dura-Flo 1200: Torque to 386-407 N•m (285-300 ft-lb).
4
4
4
4
P
TI8361a

Repair
8311827G
Reassembly
1. If it was necessary to remove the piston ball guide
(9) from the displacement rod (1), clean the threads
of the rod and ball guide. Screw the ball housing
onto the rod, handtight. Place the flats of the ball
guide in a vise and torque as noted in FIG. 4.
2. See FIG. 4. Install the piston packings on the piston
(15) in the correct order for your lower, see Repair
Kits, pages 14-17. Install the v-packings (P) one at
a time with the lips facing up.
3. See FIG. 2. Place the flats of the piston (15) in a
vise. Place the ball (10*) on the piston seat (E).
Screw the piston ball guide (9) onto the piston hand
tight, then torque as noted.
4. See FIG. 4. Lubricate the throat packings (T). Install
the throat packings in the outlet housing (7) in the
correct order for your lower, see Repair Kits, pages
14-17. Install the v-packings (T) one at a time with
the lips facing down.
5. Lubricate the threads of the packing nut (2), and
loosely install it in the outlet housing (7).
6. Lubricate the piston packings (P). Slide the dis-
placement rod (1) and piston assembly down into
the cylinder (8). The cylinder is symmetrical, so
either end may face up. Use a rubber mallet to drive
the rod into the cylinder, until the piston (15) is near
the bottom of the cylinder.
7. Install the seal (24*) on the top of the cylinder (8).
Lubricate the seal and the top threads of the cylin-
der.
8. Place the outlet housing (7) in a vise, see FIG. 1.
Slide the rod (1) into the housing, then screw the
cylinder (8) into the housing handtight. The threads
will engage easily until the seal (24*) contacts the
sealing surface of the outlet housing. The top of the
rod will protrude from the packing nut (2).
9. See FIG. 4. Install the seal (24*) on the bottom of the
cylinder (8). Lubricate the seal and the threads of
the cylinder. With the beveled ball stop surfaces
(S) facing down, screw the intake housing (16)
onto the cylinder handtight. The threads will engage
easily until the seal (24*) contacts the sealing sur-
face of the intake housing.
10. See FIG. 3. Install the seal (30*) on the intake valve
(18). Lubricate the seal and the threads of the intake
valve. Place the intake ball (17*) in the intake hous-
ing (16), then screw the intake valve (18) into the
intake housing handtight. The threads will engage
easily until the seal (30*) contacts the sealing sur-
face of the intake housing.
11. Torque the intake housing (16) as noted in FIG. 4.
This will torque both cylinder joints A and B.
12. Torque the intake valve (18) as noted in FIG. 4.
13. Torque the packing nut (2) as noted in FIG. 4.
14. Reconnect the lower to the motor as explained in
your separate pump assembly manual.
To convert the lower to a different packing material,
see Repair Kits, pages 14-17.
To convert the lower to a different packing material,
see Repair Kits, pages 14-17.
CAUTION
To reduce the possibility of costly damage to the rod
(1) and cylinder (8), always use a rubber mallet to
drive the rod into the cylinder. Never use a hammer to
drive the rod.
FIG. 3
16
18
1
2
17*
30*
Orient so the end with the ball cavity (S, see FIG. 4)
faces the ball (17*).
Lubricate.
1
22
4493a

Repair
311827G 9
FIG. 4
1
TI8389a
TI8389a2
TI8389a1
Piston Packings (P)
see Repair Kits, pages 14-17
Throat Packings (T)
see Repair Kits, pages 14-17
1
2
7
T
*24
8
P
*24
16
18
*17 S
30*
15
9
10*
Dura-Flo 600 and 750: Torque to 61-75 N•m (45-55 ft-lb).
Dura-Flo 900 and 1200: Torque to 136-149 N•m (100-110 ft-lb).
Torque to 325-353 N•m (240-260 ft-lb).
Dura-Flo 600 and 750: Torque to 258-285 N•m (190-210 ft-lb).
Dura-Flo 900: Torque to 271-298 N•m (200-220 ft-lb).
Dura-Flo 1200: Torque to 386-407 N•m (285-300 ft-lb).
Lubricate.
Lips must face up.
Lips must face down.
Torque to 190-217 N•m (140-160 ft-lb).
Dura-Flo 600: Apply thread sealant.
1
2
3
4
5
6
7
8
7
2
3
4 6
4 5
4
4
4
3
3
B
A
8

Parts
10 311827G
Parts
See the parts listings on pages 11 and 12.
TI8342b
2
7
1
*24
8
18
17*
30*
16
24*
15
10*
9
50*
See Repair Kits,
page 14
*50
See Repair Kits,
page 14
20
51 52