Simplicity 7100 Series Operator's Manual page 42

Adjustments
6. Lift the front of the mower and attach
the mower hitch to the tractor front
hitch using the pins and safety clips
provided with the mower. The pins are
installed from the outside, and it is
usually easier to install the left hand
side pin first.
WARNING
For your personal safety, be sure to
remove tractor ignition key after us¬
ing it to operate the optional electric
lift. Accidental starting is possible if
the key is left in the ignition.
7. Lower the mower fully.
8. Push the belt tensioning lever (C, figure
37) fully down and forward.
9. Raise the tractor seat to gain access to
the PTO pulley.
10. Install the mower drive belt provided
on the mower pulley and the tractor
pulleys. The belt must be seated in the
inner groove of the drive pulley (B).
Make sure that flat side of the belt
contacts the front idler pulley (L).
11. Pull the belt tensioning lever fully back
and up to put tension on the mower
drive belt.
12. Pull the belt tensioning lever (C, figure
37) up to tighten the belt. If the belt is
new, the rear edge of the idler bracket
(A, figure 38) should be aligned with the
front edge of the green zone shown in
figure 38. The distance between idler
bracket (A) and stop (C) will be approx¬
imately 1-3/16 inch (30 mm).
If the belt has been used before, the rear
edge of the idler bracket (A, figure 38)
should be in the middle of the green
zone shown in figure 38. The distance
between idler bracket (A) and stop (C)
will be approximately 7/8 inch (22
mm).
If adjustment is required, go to step 13.
If adjustment is not required, go to step
14.
13. Push the belt tensioning lever down to
release belt tension. Loosen the nut that
secures the rear idler pulley (D, figure
38) in the slot. To move the idler
bracket (A) forward, move rear idler
pulley (D) toward rear. To move the
idler bracket (A) toward rear, move the
Figure 38. Belt Adjustment
idler pulley (D) forward. Tighten the
nut to secure pulley. Pull the belt ten¬
sioning lever up and recheck position of
idler bracket (A). Readjust if necessary.
14. Operate the tractor with mower engag¬
ed for 15 to 30 minutes with a new belt
or about two minutes with a used belt.
Then stop the engine, remove the key,
shift into neutral, set the parking brake
and disengage the PTO. Check position
of idler bracket (A, figure 38). If the rear
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