Displacement Pump
22 308870G
Displacement Pump
Removal
1. Flush pump.
2. Cycle pump with piston rod (222) in lowest position
(F
IG. 23).
3. Relieve pressure, page 6.
4. Remove suction tube (30) and hose (33).
5. Use screwdriver to push out pump pin (101) (F
IG.
24).
6. Loosen locknut by hitting firmly with a 20 oz (maxi-
mum) hammer (F
IG. 25). Unscrew pump.
NOTE: See manual 308798 for pump repair instruc-
tions.
Installation
1. Pull piston rod out 1.0 in. Screw in pump until holes
in housing plates and piston rod align (F
IG. 26).
2. See Detail A (F
IG. 24). Push pin (101) into hole until
retaining clip (20a) snaps over pin.
FIG. 23
FIG. 24
FIG. 25
If pin works loose, parts could break off due to force
of pumping action. Parts could project through the air
and result in serious injury or property damage. Make
sure pin (101) and retaining clip (20a) are properly
installed. See Detail A. Fig. 18.
NOTICE
If the pump locknut loosens during operation, the
threads of the bearing housing will be damaged.
Make sure locknut is properly tightened.
FIG. 26
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