Reassembling The Pump - Graco A Series Instructions Manual

Displacement Pump

Reassembling the Pump

NOTE 1: Alternate plastic and leather packings. See Fig
3. The lips of the throat V-packings face down. The lips
of the piston V-packings face up. Incorrect installation
damages the packings and causes pump leaking.
NOTE 2:Soak the leather packings in oil before reas-
sembling the pump.
1. Check the outside of the piston rod (107) and the
inside of the cylinder (115) for wear. Replace worn
parts to ensure a good seal with the new packings.
2. Stack these parts onto the piston valve (108) one at
a time: Models 235699 and 241320 only: the
backup washer (126*) and u-cup (125*), then
All Models: the female gland (114*), alternately
three plastic (112*) with two leather packings (113*),
and the male gland (111*). See Fig 4.
3. Tighten the nut (110) onto the piston valve (108) to
2 in-lb (0.23 N.m). See Fig 4.
NOTE 3:Note the alignment of the piston (108) to the
nut (110). Maintain this alignment through Step 8.
4. Clean all residue from the piston valve threads.
Apply a strip of adhesive, supplied, to the threads.
5. Place the ball (109*) on piston valve (108) (Fig 4).
Tightening the piston valve into the rod, is critical. Fol-
low the procedure carefully to avoid damaging the
packings by over-tightening.
6. Hand tighten the valve into the piston rod just until
the nut (110) contacts the rod. See Fig 5.
110
TORQUE TO
2 in-lb (0.23 N.m)
*111
*113
*125
For Models
235699 and
241320 only
*126
F . 4
IG
6
NOTICE
107
109*
APPLY A
STRIP OF
SEALANT TO
THESE
THREADS
112*
114*
108
DO NOT ALLOW NUT
(110) TO MOVE RELATIVE
TO PISTON (108) WHEN
TIGHTENING PISTON
AGAINST ROD
110
TORQUE NUT
AGAINST ROD
TO 30 ft-lb (40 N.m)
F . 5
IG
7. Place the flats of the rod (107) in a vise.
8. CAREFULLY tighten the nut (110) against the pis-
ton rod to 30 ft-lb (40 N.m). See Fig 5. Use two
wrenches to maintain the alignment mentioned in
NOTE 3, to the left.
9. Stack parts one at a time into the top of the manifold
(101): the male gland (106*), alternately three plas-
tic packings (104*) with two leather packings (105*),
and then the female gland (103*). See Fig 6.
*103
*105
Leather
Lips of
v-packings
face down
*116
110
*111
*113
Leather
Lips of
v-packings
face up
108
115
120
*119
118
1720
Torque to
53 ft-lb (71 N.m)
F . 6
IG
107
108
1
107
123
102
104*
Polyethylene
Lips of
v-packings
face down
106*
101
Torque to
117
73 ft-lb (98
112*
Polyethylene
Lips of
v-packing
face up
114*
For
125*
Models
126*
235699
and
122*
241320
only
121*
03147
308190M