Chapter 6 — Adjustment Procedures
Part No. 750-184 6-3
3. The closer the connector is to the drive shaft, the less the arm
will travel; the closer the connector is to the driven shaft, the far-
ther that arm will travel.
4. Over-travel linkage, where used, should not be required in order
to extend its spring to the fullest stretch.
With the modulating motor in the low fire position, the arm on its
shaft should be at an angle of 45° below the horizontal. The driven
arm on the jack shaft should also be 45° below horizontal. Secure
both arms and fit the connecting linkage rod in place between them.
Refer to Figure 6-1.
Position the oil and/or gas modulating cams on the jackshaft so that
the cam follower assembly is between the first and second cam
adjusting screws (under the first adjusting screw for High Turndown
Figure 6-1 Complete Linkage Assembly - Combination Gas and Oil
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