INTRODUCTION.
This instruction book contains operation and
The Engine Distributor Tester, Model PDT-5D,
maintenance instructions, and a parts list for
the Engine Distributor Tester Model PDT-5D.
electronic equipment.
The Engine Distributor
Tester Model PDT-5D, which will be referred to
OPERATION.
as the distributor tester in this instruction book
T h e electric motor that turns the distributor
is capable of making complete tests on automo-
shaft, and the electrical circuits for the indi-
bile and truck ignition distributors. The condi-
cating instruments operate on 115-volts, 60 -cy-
tion of 24-, 12-, and 6-volt ignition distributors
cle power. The drive motor turns the chuck and
can be determined.
stroboscopic light assembly through a variable
speed drive. Speed, vacuum and dwell are indi-
cated on meters, and the advance is indicated
The distributor tester consists of a metal cab-
on the indicator ring which is graduated in de-
inet, with a sloping panel containing the distrib-
grees, and is adjustable. The stroboscopic light
utor m o u n t i n g clamps, d r i v i n g mechanism,
flashing on the arrow on the moving disc indi-
stroboscopic indicator ring, and associated in-
cates the amount of advance of the distributor.
s t r u m e n t s and controls. The metal cover has
A ground stud is conveniently located on the
t w o handles and slides over the distributor
right hand distributary clamp for attaching the
tester gripping the base with four fasteners. The
ground lead.
b a s e of the tester rests on four rubber feet.
INSTRUMENTS AND CONTROLS. (See Figure 1.)
An accessory box with a lead hanger on each end
The names and functions of the instruments and
is mounted at the top of the cabinet, and the in-
operating controls of the distributor tester are
s t r u c t i o n books are in back of the cabinet.
Description and Function
Figure and
Common Name
and Marking
Index No.
Bourdon tube type gage, with pointer, reading
Vacuum Gage;
1-12
inches of vacuum applied to the distributor vac-
INCHES VACUUM;
uum advance mechanism. Set pointer on zero
0-21; ZERO ADJUST.
before using by turning ZERO ADJUSTMENT.
Pointer type meter with a 0-50 degree scale and a
1-13
Dwell Meter;
black band indicating electrical circuit resistance
DEGREES OF DWELL;
in the distributor. The dual function meter in-
0-50; SET LINE; DIS-
dicates breaker point dwell in degrees and nor-
TRIBUTOR RESISTANCE
mal resistance in the distributor when the point-
er reads in the black band. When the pointer
reads out of the black band, the resistance is too
high.
Pointer type meter with two scales, reading from
1-14
RPM Meter;
zero to 2500 rpm. Indicates the speed of the dis-
DISTRIBUTOR RPM;
0-500; 0-2500.
tributor shaft in revolutions per minute,
Black bakelite control knob, with 5 positions:
Tach-Dwell Switch;
1-11
OFF: RPM and DWELL Meters turned off.
OFF-CAL. -6 CYL. -
CAL: In this position the DWELL METER
8 CYL. -4 CYL.
pointer should be set on the SET LINE.
6 CYL: Place in this position for a 6-lobe
distributor.
8 CYL: Place in this position for an 8-lobe
distributor.
4 CYL: Place in this position for a 4-lobe
distributor.