Electric Governor System Adjustment; Actuator Linkage Adjustment - Hobart 90 C 20 Operation And Maintenance Manual

E. Electric Governor System Adjustment
Two electric governor system main components, namely the magnetic pickup and controller, have critical
adjustments which can affect engine performance and therefore generator output. The adjustment of the
actuator linkage can also affect engine performance.
When the complete system is to be checked and/or adjusted, a definite sequence of procedures should
be followed:
First - Check or adjust actuator linkage
Second - Check or adjust magnetic pick-up
Third - Check or adjust electric control box

(1) Actuator linkage adjustment

The proper adjustment of the mechanical linkage between the electric actuator and engine speed
control lever is important to the satisfactory operation of the complete system.
Exact adjustment instructions regarding effective length of rod assembly (items 4,5,6, and 7,Fig. 4), or
regarding the proper hole in actuator lever in which to attach ball joint (4) cannot be determined be-
cause of slight variations in brackets, mountings, and engine performance characteristics. However,
definite rules must be followed in making the adjustments:
RULE 1. Adjust linkage to use FULL TRAVEL of actuator output shaft (1).
RULE 2. Linkage must move speed control lever from FULL IDLE to FULL SPEED position, or
VERY CLOSE to FULL SPEED position in order for the generator to pull 125% load.
Check and adjust linkage as follows, with engine stopped.
(a) Before making adjustment, observe and note which hole in actuator lever (3) is used to mount
ball joint (4). It does not necessarily have to be the same hole as may have been previously used.
Disconnect ball joint (4) from actuator lever (3).
(b) Be sure neither lever (the actuator lever, 3, or the fuel control lever) has slipped on shafts. If a
lever has slipped, position it correctly and tighten securely.
(c) Place both levers (3 and 7) in FULL IDLE position an attempt to connect ball joint (4) at the
hole in actuator lever (3) from which it was removed in step (a). If connection cannot be made,
loosen nuts (5) and adjust effective length of rod assembly (4,5,6 and 7, Fig. 4) so that connec-
tion can be made.
(d) Manually operate actuator lever back and forth between FULL IDLE and FULL SPEED. If ad-
justment is unsatisfactory, try another hole in ACTUATOR lever and readjust rod length.
(e) Tighten all parts securely when adjustment is completed.
August 5/89 Revised
OM-2031
2-3
Page 11