Ferris IS1500Z Series Operator's Manual page 42

Regular Maintenance
Check the Mower Belt Idler Tensioner Spring
Length
1. Park the machine on a smooth level surface such
as a concrete floor. Disengage the PTO, engage
the parking brake, turn off the engine and remove
the ignition key.
2. Lower the mower deck to its lowest cutting
position.
3. Use the Mower Belt Idler Spring Length Chart to
determine the correct spring length.
4. Measure the coil length of the mower belt tension
spring (A, Figure 45). The measurement should
equal the measurement as designated in the
chart. If the measurement does not equal the
measurement as designated in the chart, adjust
the anchor eyebolt (B).
Adjusting the Mower Belt Idler Spring Length
1. Loosen the jam nut (C, Figure 45).
2. Turn the adjustment nut (D) until the measurement
as designated in the chart is achieved.
3. Retighten the jam nut.
Mower Belt Idler Spring Length
Deck Size
48" 6-3/4"
52"
40
Measurement
inch cm
17,1
7" 17,8
E
C
D
Figure 45. Mower Belt Idler Spring Length
A. Mower Belt Tensioner Spring
B. Anchor Eyebolt
C. Jam Nut
D. Adjustment Nut
E. Measurement
A
B
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