Greensmaster Flex 21 Traction and Reel Drive System (Rev. C)Page 4 – 7
Reel Drive Belt Adjustment
1. Park mower on a level surface. Make sure engine is
OFF. Remove high tension lead from the spark plug.
2. To check reel drive belt tension:
A. Remove flange nut and belt cover (Fig.8) to ex-
pose drive belt.
B. Check belt tension by depressing belt at mid span
between the pulleys with 3 to 5 lbs (13 to 22 N) of
force (Fig. 9). The belt should deflect 1/4 inch (6 mm).
C. If deflection is correct, continue operation. If
deflection is incorrect, proceed to next step.
3. To adjust reel drive belt tension:
A. Loosen the two bearing housing mounting nuts
(Fig. 9).
B. With a 3/8 in. drive torque wrench, pivot the bear-
ing housing from 35 to 40 in–lb (40 to 46 kg–cm) to
set belt tension (Fig. 10). Do not over tension belt.
Hold bearing housing with the torque wrench and
tighten bearing housing nuts to lock adjustment.
C. Recheck belt tension deflection.
4. Place belt cover in position and secure with flange
nut.
1. Reel drive belt cover 2. Flange nut
Figure 8
2
1
1. Reel drive belt 2. Bearing housing nuts
Figure 9
3 to 5 lbs.
1/4”
2
2
1
1. Bearing housing 2. Torque wrench position
Figure 10
1
2
Traction and Reel
Drive System
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