308-444
23
Service
Tools Required
D
Torque wrench
D
Socket wrenches
D
O-ring pick
D
13/32” EZY-OUT bearing extractor
D
Rubber mallet
D
Vise with soft jaws
Diaphragm Repair
A Diaphragm Shaft Kit is available. See page 28.
Parts included in the kit are marked with a double
dagger, for example (29
}
). Use all parts in the kit.
Disassembly
NOTE: A Fluid Section Repair Kit is available. See
page 27 for the correct kit. Parts included in the kit are
marked with an asterisk, for example (401*). Use all
the parts in the kit for the best results.
NOTE: In Step 6, use a 13/32 in. EZY-OUT (B) screw
extractor to remove the bearings (31
}
). Other removal
methods may damage the pump housing (1).
NOTE: Inspect the pilot pin o-rings (28) and bearings
(27) in place. Removal will destroy the bearings and is
not required unless they are damaged. To service the
bearings, see step 6 on page 17.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 12.
1.
Relieve the pressure.
2.
Remove the clamp nuts (114) and the grounding
strip (107). See Fig. 22. Push the threaded end of
the clamps between the upper manifold (102) and
the housing (1). Rotate the clamps 90
_
so they are
parallel to the bottom manifold, slip the other end
between the bottom manifold and housing, and
remove them from the pump.
3.
Remove the screws (104) and nuts (105) holding
the manifolds (102) to the covers (101). Remove
the manifolds and o-rings (109). Pull the covers
(101) off the pump. See Fig. 22.
4.
Unscrew one fluid side plate (112) from the dia-
phragm shaft (29). Remove one diaphragm (401)
and air side plate (108).
NOTE: Some models include a PTFE diaphragm (404)
in addition to the backup diaphragm (401).
5.
Pull the other diaphragm and the shaft out of the
pump housing (1). See Fig. 22. Clamp the shaft in
a vise with soft jaws (or grip the flats with a
wrench) and unscrew the fluid side plate (112),
then disassemble the remaining diaphragm as-
sembly.
6.
Inspect the shaft (29) for wear or scratches. If it is
damaged, check the bearings (31
}
) also. Replace
parts as needed. To remove the bearings, place a
13/32 EZY-OUT (B) in a vise (C). Position the
pump housing (1) over the EZY-OUT (see Fig. 20).
Turn the housing in the direction shown by the
arrows to remove the bearing.
7.
Hook the shaft seals (30
}
) with an o-ring pick and
pull them out of the housing (1).
8.
Clean all parts and inspect for wear or damage.
Replace parts as needed.
C
Fig. 20
04030A
B
1
}
31
}
30
Summary of Contents for Husky 715
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