TM 9-2330-388-14
8.
Remove eight screws that secure pump volute
1.
If removed, install pump head to engine with four
screws.
body to pump head. Tap body free with soft hammer
(rawhide, rubber head, etc.).
2.
Apply food grade silicone on outside of pump
mechanical seal seat and carefully press into pump head
9.
Remove one screw and washer which fastens
with ceramic surface toward you.
impeller to shaft.
3.
Apply food grade silicone on side of sealing
NOTE
washer and turn onto shaft until the lip comes into
Place a long 3/8" screw or 3/8" diameter bar
contact with ceramic surface.
through one of the pump head mounting
holes and a flat bar In one of the Impeller
CAUTION
cavities. This will prevent the engine from
Keep the seal seat (ceramic) and sealing
rotating when removing screw.
washer surfaces of pump mechanical seal
clean, and be careful not to crack or chip
10.
Remove impeller by putting hardwood wedges
ceramic surface or carbon wearing lip.
on each side of impeller, between it and pump head.
The wedges should bear against impeller disc directly
4.
Place "O" rings in grooves of impeller, then line
behind impeller vanes to prevent damaging the impeller,
up keyway of shaft, push impeller onto shaft. Insert
Impeller key can be removed after impeller.
impeller key.
11.
Remove the spring and carbon section (sealing
5.
Replace screw, copper washer, and steel
washer) of food grade pump mechanical seal from shaft.
washer and tighten to
Observe the seal seat and sealing washer. If they are
scored or the lip on sealing washer is worn, replace
NOTE
complete seal assembly.
Place a long 3/8" screw or 3/8" diameter bar
12.
Inspect impeller hubs and clearance rings in
through one of the pump head mounting
pump volute and pump head and replace if any of these
holes and a flat bar In one of the Impeller
surfaces are scored or worn excessively.
cavities. This will prevent the engine from
rotating when securing screw.
13.
If service other than pump mechanical seal
replacement is being performed, remove four screws
6.
Clean gasket surfaces on pump head and pump
that cure pump head to engine.
volute body. Then use food grade silicone greased
gasket, secure pump volute body to pump head with
b.
Installation
eight screws.
WARNING
NOTE
Observe correct polarity when connecting
Use new impeller screw, copper washer,
the battery cables: positive cable to positive
gaskets, "O" rings, and nylon locking cap
post and negative to negative. If cables are
(pump head to pump volute body) screws.
reversed, even momentarily, the voltage
regulator and alternator will be damaged
7.
Connect coupler that holds "U"-tube water outlet
immediately and must be replaced.
and pump inlet adaptor.
8.
Connect pump outlet to pump by securing
A loose or intermittent ground connection
coupler with two bolts.
between battery negative terminal and
voltage regulator frame will cause a varying
9.
Connect skid to mounting plate with four bolts
charge current and damage to the voltage
and washers.
regulator may occur.
7-10