Graco LW075S Use and care manual

Repair - Parts
U-Cup
Displacement Pump 3A2313E
EN
For use with composites in hazardous and non-hazardous locations. For professional use
only.
See page 2 for model information, including maximum
working pressures.
Important Safety Instructions
Read all warnings and instructions in this manual
and in your system manual. Save all instructions.
ti18461a

Related Manuals
23A2313E
Contents
Related Manuals ...........................2
Models ...................................2
Component Identification ....................3
Repair ....................................4
Disassembly ............................4
Reassembly ............................6
Parts .....................................8
Repair Kits ...............................10
Dimensions ..............................11
Technical Data ............................11
Graco Standard Warranty ...................12
GracoInformation .........................12
Related Manuals
Manuals are available at www.graco.com.
Models
Check your displacement pump’s identification marking for the 6-digit part number. Use the
following matrix to define the construction of your displacement pump. For example, dis-
placement pump model LW075S represents a wet-cup, 75 cc, Chromex™coated rod, stain-
less steel displacement pump.
To order replacement parts, see Parts section starting on page 8. The digits in the matrix do
not correspond to the reference numbers in the Parts drawings and lists.
* Cycle refers to combination of one upstroke and one downstroke.
Manual Description
3A2315 NXT®Air Motor for FRP
3A2012 FRP Proportioner
ti18459a
L W 075 S
First
Digit
Second Digit
(Description)
Third, Fourth, and Fifth Digits
(Displacement Pump Volume Per
Cycle* in cc)
Sixth Digit
(Pump Material)
L
(Lower)
WWet-cup style 075 S Stainless Steel
100 C Carbon Steel
Model, Series
Maximum Working
Pressure
psi (MPa, bar) Fluid Inlet Fluid Outlet
LW075S, Series A 4800 (33.1, 331) 3/4 in. npt 3/8 in. npt
LW100C, Series A 3600 (24.8, 248) 3/4 in. npt 3/8 in. npt

Component Identification
3A2313E 3
Component Identification
Key:
A Piston/Rod Assembly
B Wet Cup
C Fluid Outlet
D Fluid Inlet
E Lower Cylinder
F Upper Cylinder
G Intake Valve
FIG. 1. Component Identification
A
B
D
E
G
F
ti18461a
C

Repair
43A2313E
Repair
Reference numbers and letters in parentheses in the
text refer to the callouts in the figures and the parts
drawing.
Disassembly
NOTE: Repair kits are available. See the chart on
page 10 to order the correct kit(s) for your pump.
See FIG. 2 on page 5 for disassembled view of the dis-
placement pump. Lay out all removed parts in sequence
to ease reassembly. Clean all parts with a compatible
solvent and inspect them for wear or damage.
1. Prior to removing pump, flush the system. See the
system manual.
2. Perform Pressure Relief Procedure. See the system
manual.
3. Remove the displacement pump from the system.
See the system manual.
4. Place cylinder (1) sideways in
a vise with soft jaws.
5. If inlet ball check needs repair,
use an adjustable wrench on
hex of foot valve (25) to
unscrew it from the lower cylin-
der (19). Loosen vice briefly
and tip out the ball (22).
Remove the seat (21) and use an o-ring pick to
remove the o-ring (24) from the foot valve.
6. If the ball check does not need repair, remove foot
valve (25) and lower cylinder (19) as one piece. Use
an adjustable wrench on hex of lower cylinder (19)
to remove it from the upper cylinder (1) and slide it
straight off the pump. Be careful not to damage the
piston/rod assembly (11).
7. Remove the o-ring (20) from the top of the lower cyl-
inder.
8. Loosen the wet cup (3).
9. Pull the piston/rod assembly out of the bottom of the
upper cylinder. Remove the spacer (16),
bushing (17), and seal (18) from the bottom of the
upper cylinder (1).
10. Remove the wet cup (3).
11. Remove the busing (6) and seal (7) from the bottom
of the wet cup.
NOTE: The jam nut (28) can remain attached to the
upper cylinder.
12. Remove the spacer (2) from the top of the upper cyl-
inder (1).
13. Remove the wet cup seal (4) and the upper cylinder
seal (5).
14. If piston ball check needs repair,
clamp the rod flats in a vice. Use
a 13 mm (1/2 in.) hex wrench to
remove the flow-through nut (13)
from end of piston.
15. Remove the o-ring (14), seat (12)
and ball (15).
NOTICE
Always use Genuine Graco Parts and Accessories,
available from your Graco distributor. If you supply
your own accessories, be sure they are adequately
sized and pressure rated for your system.
Threads are very sharp. Use a rag to protect hands.
ti12918a
1
25 19
ti12782a
13

Repair
3A2313E 5
FIG.2
4
ti18460b
1
27
26
28
2
7
6
5
3
25
24
21
22
23
19
20
17
18
16
10
14
12
15
NOTE 1: Apply lubricant to all o-rings and packings.
Apply thread lubricant to threads.
Torque to 54-66 ft-lb (73-89 N•m).
Torque to 90.5-109.5 ft-lb (122-148.5 N•m).
Torque to 74-86 ft-lb (100-117 N•m).
Apply threadlocker.
Apply lubricant to threads.
2
4
5
8
9
10
410
49
8
2
510
810
37
36
11 40

Repair
63A2313E
Reassembly
See FIG. 3 on page 7 for detailed view of how parts are
assembled, with torques and other specifications.
1. Clean and inspect all parts.
2. Place the ball (15) in the piston body. Install the seat
(12) and o-ring (14). Lubricate the o-ring and the
threads of the flow-through nut (10). Screw the
flow-through nut (10) into the piston/rod
assembly.
3. Place piston in vice and torque flow-through nut (10)
to 74-86 ft-lb (100-117 N•m). See illustration on
page 4.
4. Lubricate and install new wet cup seal (4) and upper
cylinder seal (5).
5. Install bushing (6) into the wet cup (3).
6. Lubricate and install the u-cup seal (7) into the wet
cup (3).
7. Install the spacer (2) in the top of the upper cylinder.
8. Lubricate the threads then screw the wet cup (3)
into the upper cylinder (1).
9. With the upper cylinder (1) upside down:
a. Drop spacer (16) into the bottom of the upper
cylinder (1).
b. Drop the u-cup (18) into the bottom of the upper
cylinder.
c. Partially thread the lower cylinder (19) into the
upper cylinder (1) to press the u-cup seal into
place until the seal seats.
d. Unthread lower cylinder then drop in the
bushing (17).
e. Push the piston/rod assembly into the upper
cylinder (1).
f. Put o-ring (20) in place.
g. Lubricate threads then torque lower cylinder
against upper cylinder to 90.5-109.5 ft-lb
(122-148.5 N•m).
10. Lubricate and install the seal (23) on the bottom of
the lower cylinder (19).
11. Install the o-ring (24) and intake seat (21) into the
top of the foot valve. Lubricate the o-ring. The
seat (21) is reversible. Turn over or replace as
needed.
12. Lubricate the seal (23) and threads of the lower cyl-
inder (19). Place the ball (22) on the seat (21).
13. Keeping cylinder upright so the seat remains firmly
in place, screw the foot valve (25) into the lower cyl-
inder (19) hand tight.
14. Clamp the cylinder in a vice and torque to 74-86 ft-lb
(100-117 N•m).
15. Torque wet cup (3) to 54-66 ft-lb (73-89 N•m).
NOTICE
All threads, packings, and seals must be well lubri-
cated. Use lubricant (Graco Part Number 111265) or
a similar product.
NOTICE
Discard all o-rings removed from the pump. Com-
pressed PTFE o-rings may cause the pump to leak.

Repair
3A2313E 7
FIG.3
4
ti18460b
1
27
26
28
2
7
6
5
3
25
24
21
22
23
19
20
17
18
16
10
14
12
15
NOTE 1: Apply lubricant to all o-rings and packings.
Apply thread lubricant to threads.
Torque to 54-66 ft-lb (73-89 N•m).
Torque to 90.5-109.5 ft-lb (122-148.5 N•m).
Torque to 74-86 ft-lb (100-117 N•m).
Apply threadlocker.
Apply lubricant to threads.
2
4
5
8
9
10
410
49
8
2
510
810
37
36
11 40

Parts
83A2313E
Parts
4
ti18460b
1
27
26
28
2
7
6
5
3
25
24
21
22
23
19
20
17
18
16
10
14
12
15
NOTE 1: Apply lubricant to all o-rings and packings.
Apply thread lubricant to threads.
Torque to 54-66 ft-lb (73-89 N•m).
Torque to 90.5-109.5 ft-lb (122-148.5 N•m).
Torque to 74-86 ft-lb (100-117 N•m).
Apply threadlocker.
Apply lubricant to threads.
2
4
5
8
9
10
410
49
8
2
510
810
37
36
11 40

Parts
3A2313E 9
--- Not sold separately.
* Included in seal repair kit. See page 10.
† Included in seat repair kit. Stainless steel seats also
are available. See page 10.
◆Included in check ball kit. Tungsten carbide check
balls also are available. See page 10.
Ref. Description LW075S LW100C Qty.
1CYLINDER, upper (also includes: 5,
20, 26, 27)
24A815 16P061 1
2* SPACER, u-cup, throat --- --- 1
3CUP, wet (also includes: 4, 5) 24A809 16P062 1
4O-RING (pack of 10) 24A631 24A632 1
5* O-RING, ptfe (pack of 10) 24P190 24P191 1
6* BUSHING, throat --- --- 1
7* SEAL, u-cup, throat --- --- 1
10† NUT, flow through --- --- 1
11 KIT, piston and rod (also includes: 8,
9, 10, 12, 13, 14, 15)
25B082 25N495 1
12† SEAT, carbide --- --- 1
14† O-RING (pack of 10) 24P189 24P189 1
15◆BALL, valve, check --- --- 1
16* SPACER, u-cup, piston --- --- 1
17* BUSHING, piston --- --- 1
18* SEAL, u-cup, piston --- --- 1
19 CYLINDER, lower (also includes:
20, 23)
24A824 16P063 1
20*† O-RING (pack of 10) 24P192 24P193 1
21† SEAT, carbide --- --- 1
22◆BALL --- --- 1
23†* PACKING, o-ring (pack of 10) 24P196 24P196 1
24† PACKING, o-ring (pack of 10) 24P194 24P195 1
25 VALVE, foot (also includes: 23) 24A836 16P064 1
26 FITTING, 3/8-18 npt x 3/4-16 unf
(also includes: 27)
24A840 24A840 1
27 O-RING (pack of 10) 24E457 24E457 1
28 NUT, jam 24A636 24A637 1
36 NUT, coupler (used with coupling
collar, ref. 37 to connect rod to air
motor)
15T311 15T311 1
37 COLLAR, coupling, half-cylinder; for
connecting to air motor (pack of 10)
24A619 24A619 2
39 FLUID, TSL™, 8 oz bottle 206994 206994 1
40 RESERVOIR, TSL 24A625 24A626 1

Repair Kits
10 3A2313E
Repair Kits
See parts illustration and parts list beginning on page 8 for descriptions of items included in each kit.
Kit Description LW075S
LW100
C
* Seal Repair Kit
Includes items 2, 5, 6, 7, 16, 17, 18, 20, and 23. 16N231 16N232
† Seat Repair Kit
Includes items: seats (12, 21), o-rings (14, 20,
23, 24), and flow-through nut (10)
Tungsten Carbide (Standard) 24A783 24A784
◆Check Ball Kit
Includes items: piston ball (15), and intake
ball (22)
Stainless Steel (Standard) 24A263 24A264
Tungsten Carbide 24A669 24A670
Connecting Kit
Includes tie-plate, 3 tie-rods, 3 tie-rod nuts,
spring guard, coupling nut, 2 coupling collars,
TSL reservoir, reservoir o-ring, and TSL.
16N242 16N243