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307-735
16
Fig
12
222
*206
*204
*207
215
52
33
34
58
223
A
36
55
10
TORQUE
TO
70
ft–lb
(95 N.m)
112
TORQUE TO
80 ft–lb
(107 N.m)
54
38
Reinstalling the Pump.
See
Fig 12.
1. Rotate
the crankshaft (A) so the connecting rod (54)
is in its lowest position. (Rotate the fan blades at the
rear
of the motor with a screwdriver
.)
The pump piston
rod
(223) should protrude about 1 in. (25 mm) above
the pump cylinder. Screw the pump into the pump
coupling
(36) until the pin holes are aligned. Insert the
pin
(34). Position the spring (33)
so it covers the ends
of the pin. Screw the pump
into the drive housing (55)
until it stops at the locknut (112). Unscrew the
pump
just until the union (10) faces straight back.
WARNING
Be sure the retaining spring (33) is firmly and com-
pletely
in the groove of the connecting rod to prevent
the
pin (34)
from working loose due to vibration.
See
Fig
12.
If
the pin
works loose, it or other parts could break of
f
due
to the force of the pumping action. These parts
could
be projected through the air and result in seri
-
ous
bodily injury or property damage, including
dam
-
age
to the pump, connecting rod or bearing housing.
2. Torque
the locknut (1
12) to 70 ft–lb (95 N.m).
3. Reassemble
the remaining parts, in
the reverse order
of
removal.
Disassembly.
See
Fig 15
, except where noted.
1. Remove
and disassemble the intake valve (222). If no
further
service is needed, reasemble the valve, using
a
new gasket (206). T
orque to
80 ft–lb (107 N.m).
See
Fig
12.
2.
Remove the packing nut (221) and plug (201).
3. Tap the piston rod (223) down with a plastic mallet.
Pull
the rod out the bottom of the cylinder (216).
4. Remove the packings and glands from the throat of
the
cylinder (216).
5. Clamp the flats of the piston rod (223) in a vise. Un-
screw the retaining nut (214). Unscrew the piston
valve (224) from the rod. Remove all parts from the
piston.
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 (223) and the inside
of the cylinder (216) 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 15, starting the the polyethylene pack-
ings.
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 (205) face down
.
Incorrect installation damages the packings and re-
sults
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.