Magnetic Pickup Adjustment - Hobart 140GT17P Operation And Maintenance Manual With Illustrated Parts List

(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 (less than 2.5-V AC) as indicated by a voltage test at the pick-up with the engine
running at rated speed, proceed as follows:
(a) Disconnect "pull-apart" connector (1, Fig. 5).
(b) Loosen nut (3) and remove magnetic pickup (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.
(e) Install the magnetic pickup into the tapped mounting hole and thread it in until the tip touches
the "in-line" flywheel gear tooth.
CAUTION: THE PICKUP TIP MUST BE DIRECTLY OVER A TOOTH AND NOT BETWEEN TEETH
WHEN ADJUSTMENT IS MADE.
(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 controller
terminals 5 and 6 when the engine is running at no load and governed speed, and approximately
2.5-V at cranking speed.
NOTE: As little a 1-V is required for operation of governor control box. Magnetic pickup voltage does not
have to be 4-V to 8-V.
March 16/90
OM-2029
1. Connector
2. Magnetic pick-up
3. Nut
Magnetic Pickup Adjust-
ment
Figure 5
2-3
Page 11