4-1. INSTRUMENTATION AND CONTROLS
b. Position the distributor in the clamp with the
vacuum chamber pointing to the left. Tighten the
4-2. To facilitate the identification of the instru-
clamp arms on the machined surface of the distribu-
ments and controls, the nomenclature used in this
section corresponds with the tester nomenclature.
c. Using the elevation crank lower the distributor
shaft into the chuck for about 3/4". Do not try to bot-
tom the shaft in the chuck.
d. Tighten the chuck, making sure that the shaft is
4-4. The following instructions are general and do
positioned in the center of its up and down end pIay
not contain specific test parameters. Refer to the
travel. Tighten the elevation clamp lock screw.
manufacturers handbook or the military distributor
4-6. DISTRIBUTOR RESISTANCE TEST
manual for specific test procedures and the require-
ments for the distributor being tested.
4-5. DISTRIBUTOR MOUNTING
4-7. This test indicates the resistance of the dis-
tributor circuit from the terminal through the
points to the distributor body. Excessive resistance
raise the clamp arms high enough to permit the dis-
in the points circuit will degrade the coil operation
tributor shaft to clear the chuck.
Measures vacuum created by tester pump applied
to distributor under test.
Measures speed of distributor under test.
Measures distributor dwell angle when distributor
Raises elevating mechanism to position clamp arms
to accommodate different size distributors.
Connection point to distributor under test for stan-
dard breaker point distributors.
Connection point for electronic pulse generator
Connection for measuring dwell.
Vacuum connection to distributor under test.
Regulates vacuum applied to test item.
Starts and stops vacuum pump.
Adjusts dwell meter.
Tach range High/Low
Selects tachometer range 0 to 2500 or 0 to 500 rpm.
Starts and stops tester in either direction of rota-
Main power switch
Increases and decreases speed of tester.
Indicates the point of ignition established by the
unit under test.
drives the shaft of the unit under test.
3 jaw chuck
Hold distributor in position for testing.
Selects internal circuits for type of distributor
Storage compartment for adapters and accessories