Graco 308271C Pump Repair Kit for kit 235186 and 235973 Owner's Manual

Instructions
Pump Repair Kit
308271C
Kit 235186 - 3 GPM TexSpray Pumps
Kit 235973 - 2 GPM TexSpray Pumps
ENG
Disassembly
This manual contains important warnings and
information. Read and retain for reference.
1.
Refer to sprayer manual for instructions on removing pump
from sprayer.
2.
Use a hammer on tabs of lug nut (L) to loosen foot valve
housing.
3.
MOVING PARTS HAZARD
To reduce the risk of injury, including injury from moving
parts, always follow this procedure when not spraying and
before checking or adjusting the system.
Disassemble pump. Do not disassemble piston rod (J) from
piston housing (E) unless a part needs to be replaced; the
joint must be heated before disassembly.
4.
Use a compatible solvent to thoroughly clean all parts and
remove all traces of sealant.
1.
Turn the Easy Spray Control to OFF.
5.
2.
Turn the engine stop lever to OFF.
Inspect the parts (including the seats) for nicks and
scratches. Replace worn or damaged parts as they cause
packing to wear more quickly and may result in poor pump
performance.
E
A
5
4
6
J
To Replace Pressure Drain Valve Packing
Remove three screws (AA), and pull off the cap (BB). Remove
packing (16). Install new packing with lips facing into the cap.
Reassemble drain valve. Torque screws as shown.
Torque to
1 40 to 50 in-lb
(45 to 55 N•m)
1
AA
BB
16
7
15
14
1
11
8
10
2
17
B
12
N
C
K
D
M
9
3
H
G
3
L
Part
Part
Ref. (235186) (235973) Description
1
188560 188656 V-PACKING, leather
2
187939 188568 GLAND, male
3
188557 188557 O-RING
4
188559 188555 O-RING, FKM
5
188434 188578 NUT
6
188432 188566 GLAND, male
7
188561 188657 V-PACKING, leather
8
188433 188565 GLAND, female
9
102973 102973 BALL, intake
10
188558 188556 U-CUP SEAL, poly/FKM
11
187072 188553 V-PACKING, poly
12
102972 101859 BALL, piston
14
187071 188550 V-PACKING, poly
15
187070 188567 GLAND, female
16
111829 111829 U-CUP PACKING (for pressure
drain valve)
17
188627 188626 WASHER, backup
Qty.
2
1
2
1
1
1
2
1
1
1
3
1
3
1
1
1
Reassembly
1. If disassembled, clean piston rod (J) and piston housing (E)
threads thoroughly. Apply thread sealant to threads and
torque to 80 to 100 ft-lb (110 to 135 N•m). Allow to dry at
least one hour.
2.
Assemble the following onto piston seat (K): backup washer
(17), u-cup seal (10) with lips toward ring, female glad (8)
and then alternate white (7) and purple packings (11) all
with lips facing up, and male glad.
3.
Install nut (5) on piston seat (K). Hand tighten nut very
firmly.
4.
Install ball (12) in piston housing (E).
5.
Apply thread sealant (supplied in kit) to piston seat (K)
threads and screw assembly onto rod. Hand tighten.
Grease inside of throat
1 before installing packings
7.
Lips of v-packings in throat
must be face down
7
Grease outside of packings
before installing
3
Grease inside of packings
after installing
8
Lips of u-cup seal on piston
must face down
4
Torque 50 to 70 in-lb (5.6 to
8 N•m) in crosswise pattern
9
5
Place piston seat (K) in a vise. Hold packing nut (5) steady
with one wrench and use a torque wrench to tighten rod
assembly to 90 to 125 ft-lb (122 to 170 N•m). Make sure the
line made in step 5 is still aligned.
Grease throat of intake housing (B). Assemble the following
into throat: male glad (2) flat side first, alternate white
packings (14) and purple packings (1) and then female
gland, all with lips facing down. Install packing nut (A) and
tighten firmly by hand.
8.
Grease piston packings and inside throat packings.
9.
Grease new o-rings (3) and install on cylinder (G). Slide
cylinder into bottom of intake housing (B) until you hear it
snap.
10. Guide piston rod assembly into cylinder so piston rod flats
are aligned with opening in front of pump. Push down until
you hear another snap. Turn pump over and push assembly
the rest of the way in.
13. Install ball (9) and ball guide (M) into foot valve. Place pump
assembly on foot valve and push into place.
14. Screw on lug nut (L). Use a hammer to tighten lug nut
securely.
TIP: The lug nut must be very tight or the pump will not prime.
Use a felt tip marker to draw a line between the intake housing
and the lug but to use as a visual alignment reference during
operation.
15. Install pump and prime it. Check packing nut (A) and tighten
it just enough to prevent leakage.
Torque piston housing to
piston seat (K) to 90 to 125
ft-lb (122 to 170 N•m)
without changing alignment
of packing nut
If piston seat and rod were
separated, apply thread
sealant and torque to 80 to
100 ft-lb (110 to 135 N•m)
10 Tighten with hammer
A
1
B
15
2
14
3
2
1
J
3
2
9
N
4
C
3
D
12
4
E
11. If rod hole is not aligned with front of pump, use a
screwdriver through rod hole to rotate it into place.
12. Grease o-ring (N), install on plug (C), install plug and
screws (D) loosely. Torque screws to 50 to 70 in-lb (5.6 to 8
N•m) in crosswise pattern.
Lips of v-packings on piston
must face up
2
TIP: Use a felt tip marker to draw a line across the male gland,
nut and piston housing to use as a visual reference when
tightening the piston and nut.
6.
6
6
6
5
7
11
5
6
7
7
K
8
8
L
10
17
M
G
3
10
9
H
All written and visual data contained in this document reflects the latest product information available at the time of publication.
Graco reserves the right to make changes at any time without notice.
This manual contains English. MM 308271
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
2
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440-1441
Copyright 2009, Graco Inc. is registered to ISO 9001
www.graco.com
308271C

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project