Repair
20
3A2806A
Repair
Level Sensor and Well
NOTE: For proper level sensor function, the tip of
the level sensor well must protrude at least 1/8 in.
into the reservoir.
1.
Turn main power off.
2.
Close ball valves on the drum outlets.
3.
Drain drums to below level sensor well.
4.
Unscrew level sensor harness cable (CD) from level
sensor well housing (CA).
5.
Use a crescent wrench to remove level sensor
well housing from tank (C).
6.
Remove the old level sensor (CB) from well housing.
7.
Measure the length of the level sensor well housing,
and then measure the depth of the hole in the fitting
where the well is inserted. Note these measure-
ments as they will be needed later.
8.
Being careful to not cross-threads, thread assem-
bled level sensor (CB) into well housing until it bot-
toms out against the bottom of the well. The bottom
of the level sensor will be slightly visible through the
bottom of the well.
NOTE: In the following step, do not allow PTFE
paste or tape to cover the tip of the level sensor
well. If paste comes in contact with the tip of the
level sensor well, thoroughly wipe it clean.
9.
Apply PTFE paste and PTFE tape to the male
threads of the level sensor well housing.
10. Being careful to not cross-threads, thread the level
sensor well into the tank (C) and lightly tighten with
a crescent wrench.
11. Measure the amount of the level sensor well hous-
ing that is visible beyond the day tank hole, then
perform the following equation:
12. The protrusion length must be at least 1/8 in.
(3.2 mm). If not, remove the level sensor well and
restart at step 7.
F
IG
. 9: Level Sensor Assembly
r_24b969_3A0395a_7a-2
CA
CB
CC
CD
NOTICE
Level sensor must be oriented with the sensing face
pointing down. Alternate orientations could result in
material pooling on the sensor face, resulting in a
false reading.
P = L1 - (L2 + L3)
P = Protrusion length (inside of day tank)
L1 = Length of level sensor well (A10)
L2 = Visible length of level sensor well
L3 = Length of well threads in fitting
