TM 5-3810-288-12
sion leads to spark plugs as described in paragraph 3-49f.
(3) Testing distributor coil.
(a) Refer to figure 3-53 and remove the cover
screws and metal cover from the distributor. Tag and
disconnect the primary leads from the coil.
(b) Check the continuity of the coil primary (fig. 3-
terminals. The voltmeter reading should be very low.
(c) Check the continuity of the coil secondary by
connecting a DC voltmeter across one primary terminal and
the secondary terminal. The voltmeter reading should be
high.
(d) If no reading or an infinite reading is obtained,
the coil is open or shorted, and should be replaced. Refer to
(4) below.
(4) Distributor coil replacement.
(a) Refer to figure 3-53 and remove the cover
screws and metal cover from the distributor. Tag and
disconnect the primary leads from the coil (fig. 3-54). Press
the coil out of the distributor body carefully.
(b) Position new coil in the opening in the '
distributor body and press the coil into the body carefully.
(c) Reconnect the primary leads and in- stall the
metal cover with cover screws on the distributor body.
(d) If possible, it is recommended that the distributor
Figure 3-47. Radiator guard and hoses, removal
and coil be re-waterproofed by spraying with a clear acrylic
and replacement. (Sheet 2 of 3)
varnish.
tact at the breaker points. To assure accurate
(5) Point and capacitor replacement.
timing, make up a simple light circuit consisting of
a 24 volt automotive light bulb with soldered- on
(a) Remove metal cover (fig. 3-53). Refer to figure
leads or a socket with leads attached as shown in
movable breaker point, and attach the other lead
(b) Remove eccentric screw (fig. 3-54). Remove
to ground. Turn the engine to TDC on the
clamp screw.
compression stroke for number one cylinder as
shown in figure 3-41. Turn the ignition switch to
(c) Remove both the fixed point and bracket, and
the ON position. Rotate the distributor body (fig.
the moveable breaker point, as an assembly. Remove the
capacitor by removing the mounting screw and lockwasher.
point opening, which will be the point where the
light turns on. Tighten the hold down screws at
(d) Install capacitor, points and rotor, in the
the base of the distributor, making sure the body
reverse order of removal. Adjust the point
does not turn further.
(d) Cover installation. Install the metal
cover on the distributor and connect the suppres-
3-54
