TM 9-4910-700-14 & P
Make sure that all meter wires
g.
operating procedures for all modes of
are free of belts, fanblades,
operation. Figure 2-1 and table 2-1
etc. , and that the meter is
show all operator's controls and indi-
resting securely on a solid sur-
cations.
face.
h. Start engine. Read RPM on RPM
ometer lead can be clipped around any
meter. The RPM switch selects
the scale in the meter to be used
of the sparkplug wires. The following
procedure should be followed.
meter may be used simultaneously with
Shut engine off if possible,
b. Note vehicle battery polarity.
the tachometer, or without the tach-
c. Set the dwell switch to the
ometer.
position corresponding to the
a. Note vehicle battery polarity
number of cylinders in the
and number of cylinders.
vehicle.
b. Set ground switch to the po-
d. Set the ground switch to the
sition corresponding to the
position corresponding to the
polarity of the battery ground.
polarity of the battery ground.
c. Set dwell switch to the dwell
e. Attach the RED battery lead to
position corresponding to the
the positive terminal of the
number of cylinders of the ve-
battery and the BLACK battery
hicle.
lead to the negative terminal
d. Locate the spark coil terminal
of the battery.
which is connected to the dist-
f. Attach the tachometer lead to
ributor.
any convenient secondary wire
e. Start engine. The dwell will
(see fig. 2-2). Do not connect
be read on the meter scale
to the center (spark coil) wire.
corresponding to the number of
If a shielded system is used on
cylinders as selected on the
the vehicle, attach an adapter
dwell switch.
sparkplug lead.
OPERATOR'S CONTROLS AND INDICATORS
NAME
DESCRIPTION
INDEX NO
DWELL SWITCH
Selects 8,6,4 cyl,percent,and points resistance.
1
GROUND SWITCH
Selects for positive or negative grounded systems.
2
DWELL METER
Displays dwell and point resistance.
3
RPM meter
Displays engine RPM.
4
RPM SWITCH
Selects 1000 or 5000 RPM.
5
DWELL LEAD
Connect to distributor primary lead
6
BAT + LEAD
Connected to positive battery terminal
7
BAT - LEAD
Connected to negative battery terminal.
8
TACH LEAD
Clips around any sparkplug wire.
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