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.
The Engine Distributor
Tester Model PDT-5D, which will be referred to
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
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
Bourdon tube type gage, with pointer, reading
inches of vacuum applied to the distributor vac-
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
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-
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
Pointer type meter with two scales, reading from
zero to 2500 rpm. Indicates the speed of the dis-
tributor shaft in revolutions per minute,
Black bakelite control knob, with 5 positions:
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
8 CYL: Place in this position for an 8-lobe
4 CYL: Place in this position for a 4-lobe