Ferris IS2000Z Series Operator's Manual page 33

2. Lower the mower deck to its lowest cutting position and
remove the mower deck guards.
WARNING
Use extreme caution when rotating the idler arm with the
breaker bar, due to the increased tension in the spring as the
idler arm is being rotated. Injury may result if the breaker bar
is prematurely released while the spring is under tension.
3. Using a 1/2" breaker bar, place the square end in the square
hole located in the end of the idler arm (A, Figures 52 & 53)
• For 52" Models: Carefully rotate the breaker bar
clockwise, which will relieve the tension on the belt
exerted from the idler arm.
52
• For 61" Models: Carefully rotate the breaker bar
counter-clockwise, which will relieve the tension on
the belt exerted from the idler arm.
53
4. Slide the drive belt over the edge of the stationary idler pulley
(B, Figures 52 & 53). Carefully release the tension on the
breaker bar.
5. Remove the old belt and replace with a new one. Make sure
that the V-side of the belt runs in the pulley grooves.
6. Install the drive belt (A, Figures 54 & 55) on the PTO pulley,
the spindle pulleys (B) and all idler pulleys (C) except the
rear stationary pulley (D).
54
55
• For 52" Models: Carefully rotate the breaker bar
clockwise and install the belt on the rear stationary idler
pulley.
• For 61" Models: Carefully rotate the breaker bar
counter-clockwise and install the belt on the rear
stationary idler pulley.
7. Carefully release the tension on the breaker bar.
8. Reinstall the mower deck guards.
9. Run the mower under no-load condition for about 5 minutes
to break-in the new belt.
Check the Mower Belt Idler Tensioner Spring
Length
1. Set the mower deck to its middle cutting height position.
2. Use the Mower Belt Idler Tensioner Spring Length chart to
determine the correct spring length for your unit.
Mower Belt Idler Tensioner Spring Length
Deck Size
52"
61"
Models 5900811, 5900814, 5900816,
5900968 & 5900980
3. Measure the coil length (A, Figure 56) of the mower belt idler
tensioner spring (B). The measurement should equal the
measurement as designated in the chart. If the measurement
does not equal the measurement as designated in the chart,
Measurement
6-1/2" (16.5 cm)
6-1/8" (15,6 cm)
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