Graco 220-834, Инструкция-перечень запасных частей

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20
DISPLACEMENT PUMP
Reassembly Notes
A. Packing Repair Kit 222–587 is available. Parts in-
cluded in the kit are marked with an asterisk (*) in the
text and drawings.
B. Clean all parts thoroughly. Check the outside of the
piston rod (224) and the inside of the sleeve (218) for
scoring or scratches, which prevent the packings
from sealing properly. Replace all worn parts.
C. Alternate polyethylene and leather packings as
shown in Fig 27. Notice that:
the lips of the throat v–packings face down;
the lips of the piston V–packings face up;
the lips of the U–cup seal (203*) face down. Incorrect
installation damages the packings and results in
pump leakage.
D. Coat the piston rod and the inside of the cylinder with
lightweight oil, and soak the packings in the oil, before
reassembling.
Reassembly Procedure
1 Stack the backup washer (214*), U–cup seal (203*)
lips down , and female gland (215*), alternate the
polyethylene and leather v–packings (212*, 206*)
lips
up, and stack the male gland (210*) onto the piston
valve (222).
See Fig 27.
2 Tighten the packing retaining nut (21 1) onto the
piston valve (222) and torque to 0.7 N.m (6 in–lb).
See Fig 24.
NOTE: NOTE THE ALIGNMENT of the piston (222) to
the nut (211). Maintain this alignment throughout
Steps 2, 3 and 4.
NOTE AND MAINTAIN
THIS ALIGNMENT
THROUGHOUT STEPS
2,3, and 4
Fig 24
TORQUE NUT TO
0.7 N.m
(6 IN-LB)
APPLY ONE DROP
OF SEALANT TO
THESE THREADS
201*
222
211
0082
3 Apply
1 drop only of sealant, supplied with the repair
kit, to the piston valve threads. Place the small ball
(201*) on the valve.
See Fig 24. Hand tighten the
valve into the rod (224) just until the nut contacts the
rod. Place the flats of the displacement rod in a vise.
Fig 25
211
TORQUE NUT
AGAINST ROD TO
25 N.m (19 FT-LB)
224
0083
4 Torque the nut (211) against the rod (224) to 25 N.m
(19 ft–lb). Use two wrenches to maintain the align-
ment as mentioned in the
NOTE. See Fig 25.
5 Stack the male gland (208*), alternate the polyethyl-
ene and leather v–packings (213*, 207*)
lips down
and stack the female gland (209*) one at a time into
the top of the cylinder.
See Fig 27.
6 Loosely install the packing nut (216) and plug (205).
7 Place a new o–ring (202*) firmly in the cylinder
groove.
See Fig 27.
8 Coat the piston rod and packings with oil. Carefully
slide the assembly
INT O THE T OP OF THE
SLEEVE.
And then slide the sleeve/piston rod assembly INTO
THE BOTTOM OF THE CYLINDER. This procedure
helps prevent damaging the packings during reas-
sembly.
See Fig 26.
NOTE: The tapered end of the sleeve is the bottom of it.
Do not install it upside down. See Fig 26.
CYLINDER
Fig 26
PISTON
ASSEMBLY
SLEEVE
TAPERED END
0084
9 Assemble the intake valve. Use a new gasket (202*).
Screw the valve into the cylinder and tighten to 64
N.m (48 ft–lb).
See Fig 27.
10 Screw down the cylinder locknut (112) until it is finger
tight at the bottom of the external cylinder threads.
See Fig 27.
11 Install the displacement pump on the sprayer . See
page 19.