TM 55-4920-244-14
ponents on the bottom will
0139. Mask off loops in hinges, mounting holes,
be damaged.
and other working surfaces.
(8) Cuts and gouges in wheels are
(5) Remove deck assembly (4) from
permissible on wheels if rigidity and utility of
box assembly (18) and place on a suitable test
wheel is not affected. Cut off any loose ends if
bench.
rubber shows cracks or other signs of deteriora-
tion.
NOTE
(9) Replace any remaining compo-
The deck assembly may
nents with like serviceable items if defective.
b e removed with the
probe storage compart-
ment installed; however,
The deck assembly (4) provides a mount-
the probe storage com-
ing base for the tester control knobs, instru-
partment must be proper-
ments, connectors, and switches. The deck assem-
ly supported until the
bly is constructed of machined black plastic or
deck assembly has been
metal painted black with the markings recessed
installed and the probe
and painted white for legibility. Two stop arm
compartment stop arms re-
supports are screw-mounted in the deck assembly
connected.
for attachment of the probe storage compartment
stop arms. A power source is connected to the
(6) Remove deck gasket (6) from
tester. A lamp is provided in both galvanome-
box assembly (18).
ters (GALVO-1 and GALVO-2) to obtain an
NOTE
accurate reading during test operations. Two
fuses are provided in the deck assembly to pro-
The deck gasket should
tect the tester electrical system against electrical
be replaced at each re-
overload. Each fuseholder cap incorporates a
moval; however, if a new
light fixture to indicate when a fuse has blown.
deck gasket is not avail-
a. Removal.
able, exercise care to pre-
(1) Remove probe storage compart-
serve the original deck
ment from tester.
gasket.
(2) Loosen setscrews which secure
b. Installation.
knob (3) to shaft of voltage regulator (7). Re-
move knob.
CAUTION
Carefully inspect interior
CAUTION
of box assembly to insure
Knob (3) must be removed
that all foreign matter
before attempting to raise
has been removed.
the deck assembly.
NOTE
(3) Remove screws (5) which secure
If a new deck gasket is
deck assembly (4) to box assembly (18).
not available, carefully
examine the original deck
CAUTION
gasket for damage or de-
terioration. Apply seal-
The power lead cable must
ing compound (item 5,
be disconnected at the
table 1-1) as necessary to
deck assembly to prevent
obtain a good seal.
damage to the tester elec-
trical components.
(1) Seat deck gasket (6) in flange of
box assembly (18).
(4) Raise deck assembly (4) on its
edge and disconnect power lead cable at bottom
(2) Carefully position deck assem-
of deck assembly.
bly (4) on box assembly (18) and properly sup-
port on its side.
CAUTION
(3) Connect power lead cable at bot-
tom of deck assembly (4) and carefully lower
Do not set the deck assem-
bly so that electrical com-
deck assembly on flange of box assembly (18).
4-29
Change 4
