Simplicity 400 / 2400 Operator's Manual page 27

Adjustments
Figure 28. Leveling The Mower Side-to-Side
A. Nut
B. Eccentric Nut
C. Rear Rollers
Front-To-Back Leveling
1. Make sure mower is level side-to-side and that rear
rollers are on the ground.
2. Position blade(s) front-to-back. Measure the distance
from the ground to front tip of blade(s), and from
ground to rear tip of blade(s).
On 30" mower, the front tip should be level to 1/8"
(3 mm) higher than rear tip.
On 34" mower, the front tips should be 1/4" (6 mm)
higher than the rear tips.
3. See Figure 29. Loosen jam nut (E). To lower rear of
mower deck, loosen nut (B) which will lengthen level-
ing rod (D). To raise rear of deck, shorten leveling rod
(D). When proper measurement is obtained, tighten
nut (A) against bracket, then tighten jam nut (E)
against nut (A).
Figure 29. Front-To-Back Levelling
A. Adjustment Nut
B. Rear Nut
C. Bracket
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*2399
*2397
D. Levelling Rod
E. Jam Nut