TM 5-4610-218-12
d. Installation.
NOTE
(1) If new tubing is required, cut it to the re-
Save undamaged clamps for the in-
quired length, making sure the walls are cut square.
stallation of new tubing.
c. Clean, Inspect and Replace.
(2) Blow through the tubing to be sure the
(1) Clean the tubing with dry cleaning sol-
opening is clear.
vent P-D-680.
(3) Slide the tubing clamps on the tubing,
(2) Inspect the tubing for cracks, breaks, scale
then slide the tubing on the connectors and secure it
accumulation, and deterioration.
with the tubing clamp.
(3) Replace defective tubing.
Section XXIII. MAINTENANCE OF DIATOMITE FILTER PUMP AND MOTOR
WARNING
and adapter for cracks, breaks, and damaged
threads in the mounting holes.
Dry cleaning solvent, P-D-680, used to
(4) Inspect the wear ring and impeller for
clean parts, is potentially dangerous.
cracks and wear.
Avoid repeated and prolonged
(6) Inspect the shaft for damaged threads,
breathing of the vapors and skin con-
worn keyway, and wear around the seal and gland
tact with the liquid. Do not use near
mating surface.
open flame or excessive heat. Use in a
(6) Inspect the seal for a weak or broken
well-ventilated area. The flash-point
spring and the sealing faces for marred or scratched
of P-D-680 is 100-138 F (38-59 C).
surface. Inspect the seal bellows for cracks and de-
terioration.
4-76. Diatomite Filter Pump.
(7) Inspect all screws and nuts for damaged
a. General. The diatomite filter pump and motor
threads.
are enclosed in separate housings which are bolted
(8) Test the motor.
together to form a single intergal unit. The pump
and motor can be separated after removal from the
(a) Test the field coils for circuits by plac-
unit.
ing one probe of a miltitester in series with each
winding in turn. If the lamp does not light, there is
an open circuit and the fields must be replaced.
filter pump and motor from the van floor and sepa-
rate the motor from the pump.
(b) Test the field coils for grounds by hold-
ing one probe of a test lamps to the field body and
touching each terminal wire in turn with the other
semble the filter pump.
prod. If the test lamp lights, it indicates a grounded
d. Clean, Inspect and Repair.
coil.
(1) Clean all metal parts of the pump with
(9) Repair or replace all damaged or defective
steam or with dry cleaning solvent P-D-680. Wipe
parts of the filter pump.
the motor with a clean cloth dampened with an ap-
(10) Replace a damaged or defective motor.
proved cleaning solvent.
(2) Clean the pump seal with soap and water
semble the filter pump.
or in a nonmineral base cleaning solvent.
(3) Inspect the suction head, pump casing,
the filter pump and motor.
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