TM 9-4910-730-14&P
INTRODUCTION AND DESCRIPTION
trol panel when the tester is not in use. The tester is
1-1. INTRODUCTION
designed for bench mounting and has provision for
1-2. This publication is issued as the basic manual
bolting down to the bench. The tester is used to
for operation and service of the Tester, Engine Dis-
determine whether a distributor will meet its spec-
tributor NSN 4910-00-392-2939, Manufacturers Part
ified tolerances for proper operation in an engine.
No. 7808, Manufactured by Hydraulic Technology
The distributor being tested may be driven at any
Inc. FSCM 29516, Chatsworth, California.
required speed up to 2500 rpm in either direction of
rotation. A vacuum system and controls are pro-
vided to simulate engine vacuum for vacuum ad-
vance systems. A stroboscope is provided to ac-
1-4. The tester provides performance testing facil-
curately measure cam angle, spark advance (vacuum
i t i e s for testing battery ignition distributors re-
and mechanical) and cam lobe accuracy of both
moved from the engine. The tester has the capabili-
single and dual distributors. An amplifier is pro-
ties to test both standard breaker point distributors
vided for testing electronic pulse generator distrib-
and pulse generator electronic types.
utors. The tachometer is used to indicate the shaft
speed of the distributor under test and the dwell
meter provides a direct reading of the points dwell.
1-7. See table 1-1.
1-8. DESCRIPTION
1-10. CAUTIONS AND IDENTIFYING
MARKINGS
1-9. The tester is completely self contained, requir-
ing only connection to a proper electrical power
1-11. All cautions and identifying markings are
source for operation. All of the tester components
located directly on the instrument panel and are self
are housed in a steel cabinet assembly. A removable
explanatory.
cover completely encloses the instrument and con-
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