TM 10-4610-232-12
p.
Unscrew and pull level switch (31), with attached wires (23) free of items (32, 33 and 34).
q.
Remove nipple (32) from cover (33) and remove adapter (34) from nipple (32). Remove gasket (35).
r.
Remove chemical port cap (36) by loosening the wing nut on the cap.
s.
Unlatch rubber latch (44) from bracket (40) and remove two capscrews (37), nuts (38) and washers (39). Remove latch
bracket (40).
t.
Remove two capscrews (41), nuts (42) and washers (43) and remove rubber latch (44).
REPAIR.
a.
Repair all unserviceable components by replacement.
CAUTION
Do not overtighten fittings. This can crack the tank or ruin threads on fittings.
b.
Repair leaks at pipe threads by using two wraps of antiseize tape on male fittings.
c.
Replace wire markers (para. 4-10).
d.
Replace chemical port cap (36) if it will not seal.
NOTE
Preformed packings, ferrules and seals are not individually replaceable. When replacing
tubing or fittings these items are replaced as a "kit" or subassembly. Sections of tubing
with ferrules must be cut off if tubing is repaired rather than replaced.
e.
Replace tubing (10 and 16) if necessary.
f.
Repair damaged dust caps (para. 4-11).
g.
Repair leaks in shrink wrap (24) around wires (23) by removing the level switch (31) and reassembling as described in the
following reassembly procedure.
TEST.
a.
Hold switch (31) with clip pointing downward and the wires (23) pointing upward as shown in Figure 4-63.
b.
Refer to the inset on Figure 4-63 and locate letters P/Len float. P/L must be at clip end of shaft. If not, remove clip, and
reposition float on shaft with P/L at clip end. Reinstall clip.
c.
Attach a multi meter set to ohms x 1 to the black wire and either one of the other two wires.
d.
Check for continuity between the two wires while holding the float down with the wires pointing down and the float bottomed
out on the switch shaft. If the circuit is open, attach the multimeter to the other colored wire.
e.
The black wire is No. 324. Attach a wire marker (para. 4-10).
f.
If the meter shows continuity, then the other tested wire is No. 342 and the third wire is No. 348. Attach wire markers
(para. 4-10).
g.
If the multi meter does not show continuity, then the other tested wire is No. 348 and the third wire is No. 342. Attach wire
markers (para. 4-10).
h.
Check the operation of the switch as follows:
(1)
Wires up/float down ................................................................................324 to 342 = continuity; 324 to 348 = open
(2)
Wires up/float up .....................................................................................324 to 342 = open; 324 to 348 = continuity
4-224 Change 12
