TM 5-3895-374-24-2
7.
Remove tapered sleeve from shaft.
8.
Some Teflon seals are equipped with holding clips which
compress the seal springs. Remove holding clips to release
springs after seal is installed on shaft. Tighten all drive
setscrews securely to shaft.
9.
Coat rotor shaft with non-detergent SAE 30 weight oil. Start
end of shaft in bracket bushing and turn from right to left,
slowly pushing until the ends of the rotor teeth are just below
the face of the casing.
Leave the rotor in this position. Withdrawal of rotor and
shaft may displace the carbon seal rotating face and result
in damage to the seal.
10.
Using a .010 to .015 inch head gasket, install head and idler
assembly on pump. Pump head and casing were marked
before disassembly to insure proper reassembly If not, be
sure idler pin, which is offset in pump head. is positioned
toward and equal distance between port connections to
allow for proper flow of liquid through pump.
If pump is equipped with jacketed head plate, install at this
time along with new gasket.
Tighten head capscrews evenly.
If pump was equipped with a relief valve and it was removed
during disassembly, install on head with new gaskets. Relief
valve adjusting screw cap must always point toward suction
port. Refer to Figures 1, 2 and 3 on page 1. For relief valve
repair or adjustments, refer td Pressure Relief Valve
Instructions, page 11.
11.
Slide inner spacer collar over shaft with recessed end facing
rotor. H and HL size bearing spacer collars are not
recessed.
Place pair of half round rings on shaft and slide inner
bearing spacer collar over half round rings to lock them in
place. There is no pair of half round rings on H and HL size
pumps. Refer to Figure 5, page 4.
12.
Press lip seal, lip facing end of shaft, in inner end cap and
insert end cap through shaft end of bracket. Turn end cap
clockwise, looking at shaft end, until it engages threads.
End cap spanner wrench holes must be facing rotor. Turn
end cap with spanner wrench until it projects slightly from
opening on side of bracket. End cap must not be turned so
far that lip seal drops off end of spacer collar on shaft or end
cap becomes disengaged from threads. Refer to Figure 5,
page 4.
If this happens, remove inner spacer collar, half round rings
and end cap and start over at Step 11.
13.
Pack ball bearing with multi-purpose grease, NLGI #2.
Place on shaft and push or gently drive in place in bracket.
14.
Press lip seal, lip facing end of shaft, in outer end cap and
insert end cap in bracket. Turn end cap in bracket until it is
tight against bearing. Refer to Figure 5, page 4.
15.
Put lockwasher and locknut on shaft. Insert length of
hardwood or brass through port opening between rotor teeth
to keep shaft from turning. Tighten locknut to 100 ft.-lbs.
torque. This is equal to a 100 lb. load applied at a 1’
distance from locknut. Bend one tang of lockwasher into
slot of locknut. If tang does not line up with slot, tighten
locknut until it does. Failure to tighten locknut or engage
lockwasher tang could result in early bearing failure and
cause damage to pump.
Remove length of hardwood or brass from port opening.
16.
Adjust pump end clearance. Refer to Thrust Bearing
Adjustment, page 11.
17.
Lubricate the grease fitting over the seal chamber with
petroleum jelly, petrolatum (Vasoline) or other similar low
melting point lubricant. Lubricate all other grease fittings
with multi-purpose grease, NLGI #2.
page 3-1219
