Quantcast WATER PUMP - TM-5-6640-213-140144

 

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Figure 4-7. Removing Attaching Hardware from Under Counter
Up
TM-5-6640-213-14 Laboratory Air Mobile Aviation Fuel NSN
Next
Figure 4-8. Bottom View of Components in Apparatus
TM 5-6640-213-14
d.  Turn the apparatus on its side so that the internal compo-
nents located at the bottom are accessible (fig. 4-8).
With the aid of the volt-ohm multimeter, supplied with the
laboratory, perform continuity and short tests of the items suspected
of not working.
To replace the switch (fig. 4-9), press the side holding
f.
springs on switch, from the inside of the apparatus and push out on
the switch until free of stainless steel housing.  Tag wires, then
loosen screws and remove.
To remove auto-transformer proceed as follows:
g.
(1) Loosen setscrew holding knob on the auto-transformer
(2) Remove nut and washer located under knob, lift off
heat range dial and push auto-transformer shaft through stainless
steel housing.
(3) Tag wiring to auto-transformer (fig. 4-10).
(4) Disconnect wiring connector (fig. 4-11) from wiring
harness going to heater element and auto-transformer.
h.  Remove heater aboard (fig. 4-12) by carefully pulling up and
out of apparatus.  Turn board sideways and remove heavy wire leads
coming from auto-transformer.  When leads are free from heater board,
board can be lifted free of apparatus.
i.  Install all items in the reverse order of removal.  After
apparatus is assembled and tested, attach to counter top, and install
cabinet drawer to slide assembly with four screws, washers, and nuts
4-11
WATER PUMP.
q
The water pump requires no lubrication.
a.  Before-Operation Service.
Check electrical connection to
pump motor.
b.  During-Operation Service.
Inspect pump and motor assembly,
being alert for unusual noises or smells that could indicate malfunc-
tion.  Check pump for leaks at shaft.
Overtightening of packing nut may cause motor dam-
age.  Tighten packing nut with motor operating just
enough to stop leak.
c.  After-Operation Service.  Refill reservior with potable
water.  Inspect pump and motor for leaks.  Make necessary repairs.

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