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Displacement Pump
To reduce the risk or serious injury from pump
sleeve. If the sleeve is stuck, send the cylinder to
rupture, use only tool 224-788 to remove the
A
4
B '
21 9
4
Fig. 26
M28
6. Remove the sleeve when servicing the pump. Use
special tool, Part No. 224-787 only. Screw the nut
push the sieeve out. See Fig. 26.
(6) into the cylinder (21
9). Screw down the rod (A) to
Assembling the Pump
NOTE: Repair Kit 222-588 is available. For best results,
use all the parts in this kit. The kit includes parts marked
with an asterisk, for example (201').
NOTE: Soak the packings in oil, and coat
the
rod and in-
side of the cylinder with oil.
NOTE: Alternate leather and plastic packings Be sure
the lips of the v-packings face the direction shown. Incor-
rect installation damages the packings
and results in
pump leakage.
1. Check the piston rod (224) and the inside of the
are damaged, new packings will not seal properly.
sleeve (218) for scoring or scratches. If these parts
2. Stack the piston packings onto the piston (222) as
shown in Fig. 25.
3. Tighten the
piston nut (211) onto the piston to
10.5 in-lb (1.2 N.m.) to seat the packings, and then
back off and finger tighten.
211
222
A
Fig. 27
mp9
NOTE; Note and maintain the alignment of the piston
(222) to the nut (211) through Steps
4 , 5
and 6.
4. Apply ONE drop of adhesive, supplied with the repair
piston. Hand tighten the piston into the rod (224) just
kit, to the piston threads. Place the ball
(225') on the
the rod in a vise.
until the nut (211) contacts the rod. Place the flats of
6. Stack the throat packings into the top of the cylinder
(219). Install the packing nut (216) loosely.
Fig. I28
7. Insert the piston rod assembly (C) into the top of the
sleeve (218). install the gasket (202') on the sleeve.
Slide the sleeve assembly into the bottom of the
sleeve is at the bottom. See Fig. 28.
cylinder (219). Note that the tapered end (D) of the
gasket (202').
Tighten the
valve to 67 ft-lb
(90 N.m). See Fig.
23.
8.
Assemble and install the intake valve. Use
installing the Pump
See Fig. 23 and 29.
1. Screw the pump 3/4 of the way into the bearing hous-
ing (76). Hold the pin (71) up to the
pin hole in the con-
necting rod (79) and continue screwing in the pump
until the pin slides easily into the hole.
2. Align the top threads of the pump cylinder flush with
the face (E) of the bearing housing and so the outlet
nipple (15) faces the rear of the unit.
3.
Push the retaining spring (75) completety into the con-
necting rod groove. llghten the locknut (1 37) very light
-
70 ft-lb (95 Nm), to prevent it from loosening and
damaging the threads of the bearing housing.
Be sure the retaining spring (75) is firmly in the
groove all the way around, to prevent the pin (71)
from working loose due to vibration.
If the pin works loose, it or other parts could break
could be projected through the air and result in
off due to the force of the pump action. These parts
serious injury or property damage, including dam-
aae to the connectina rod and bearina housinp.
5. Tighten the nut (211) onto the rod (224) to 19 ft-lb (25 4. Tighten
the packing nut (216) just enough to stop
Nm). Use two wrenches to maintain the alignment
as mentioned in Step
3.
leakage. Fill the nut 1/3
full
with Graco TSL, and as-
semble the remaining parts.
308-082
27
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