Displacement
Pump Repair
WARNING
INJECTION
HAZARD
T
o reduce the risk of serious injury
,
whenever you are instructed to relieve
pressure, follow the
Pressure Relief
Procedure
on page 17.
NOTE:
Packing Repair Kit 235–703 is available.
Reference numbers of parts included in the kit are
marked with an asterisk, i.e., (121*). For the best
results, use all the new parts in the kit, even if the old
ones still look good.
NOTE:
T
o minimize down time, and for the best sprayer
performance,
clean the transducer (see page 25) when
-
ever
you repack the pump. Replace these parts as need
-
ed.
Removing the pump (See Fig. 26.)
1.
Flush the pump, if possible. Relieve pressure. Stop
the pump with the piston rod (107) in its lowest
position, if possible.
2.
Remove suction tube (32) and inlet tube (40).
(See
Suction Tube
, page 25).
3.
Use a screwdriver to push the retaining spring (12)
up and push out the pin (1
1).
4.
Loosen the screws (17). Remove the pump (18).
Repairing the pump
Refer
to Displacement Pump Manual 308–190, sup
-
plied, for pump repair information.
118
Torque
to
50 ft–lb (68 N.m)
Apply sealant
*119
*121
*122
120
11
12
17
9
107
30
21
18
Fig.
26
06933
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