Magnetic Pickup Adjustment - Hobart 100D20 Operation And Maintenance Manual With Illustrated Parts List

OM-2032 / Operation and Maintenance Manual
100D20 / Generator Sets

(2) Magnetic pickup adjustment

The strength of the magnetic pickup signal to the control box can be weakened if the tip of the
pickup is too far from the flywheel ring gear. If the pickup is to be removed for any reason, or if
the signal is weak, as indicated by test [see Para. 4, E, (4), (b)].
a. Disconnect "pull-apart" connector (1, Fig. 8) .
b. Loosen nut (3) and remove magnetic pick-up (2) .
c. Inspect to make certain the tip is not damaged from contact with the ring gear teeth (replace
pickup if damaged).
d. Rotate the engine as required to locate a ring gear tooth directly below the tapped, pickup
mounting hole. An imaginary line should pass through the center of the mounting hole, the
center of a flywheel tooth and the center of the flywheel.
CAUTION
e. Install the magnetic pickup and thread into the mounting hole until the tip touches the
"in-line" flywheel gear tooth.
f. Back the pickup outward (COUNTERCLOCKWISE) 1/2 turn. Hold the pickup securely in
this position and tighten nut (3) . This adjustment will result in a clearance of approximately
0.028 inch between the pickup tip and the flywheel teeth and give an operating AC voltage
of 4 V to 8 V at the control box terminals 5 and 6 when the engine is running at no load and
governed speed.
NOTE: As little as 1-V is required for operation of governor control box. Magnetic pickup voltage does not
have to be 4-V to 8-V.
March 31/94 Revised
The pickup tip must be directly over a tooth and not between teeth when
adjustment is made.
1. Connector
2. Magnetic pickup
3. Nut
Magnetic Pickup
Adjustment
Figure 8
Chapter 2-3
Page 19