Simplicity Hitch 1692039 Operator's Manual page 17

Spring Tension
See Figure 19. This snow plow/dozer blade is spring
loaded so that when the blade strikes a solid object,
the springs will allow the blade to release as shown,
rather than cause damage. The blade will go back to
its original position after object is cleared.
See Figure 20. To adjust spring tension hold rear nut
(B) and loosen front nut (E). Tighten rear nut (B) to
increase spring tension, or loosen to decrease ten-
sion.
For initial adjustment, tighten nut (B) on each eyebolt
enough to expose about 3/4" (19mm) of thread.
Tighten front nut (E) against rear nut (B) to lock
adjustment in place.
Figure 19. Dozer Blade "Released"
Figure 20. Tension Springs
A. Eyebolt
B. Nut, 5/16
C. Spring
15
Adjustments
D. Pivot Frame
E. Nut, 5/16