EN - 37
Replacing the Hydro Pump Belt
1. Properly stop and park unit (See Starting
and Shut Off on page 22).
2. Remove the PTO belt from the mower
clutch sheave (See Replacing Mower
Belts on page 36).
3. Slowly release the tension on the hydro
pump belt idler until all the tension is
removed from the springs.
4. Remove the clutch anchor and mounting
hardware.
5. Remove old hydro pump belt from right
hand hydrostat sheave first (Figure 32).
6. Install new hydro pump belt by
positioning belt on sheaves. Put belt
onto right hand hydrostat sheave last.
7. Replace clutch stop. Tighten hardware
to 20 – 33 lbf-ft (27 – 45 N•m).
8. Replace long mower belt on mower
clutch sheave. See Replacing Mower
Belts on page 36.
Figure 30
1. PTO Mower Belt
2. Mower Drive Belt
3. Springs
4. Mower Drive Belt Idler
5. PTO Mower Belt Idler
6. Mower Clutch Sheave
7. Center Sheave
8. Belt Guide Bolt
1
2
4
7
6
5
3
3
992239, 245
8
Figure 31
The PTO idler spring length range is
12 1/4 – 12 1/2” (31 – 31.8 cm) measured
at a 3 1/2” (8.9 cm) cutting height. Adjust
as necessary.
Measure PTO idler
spring length at outer
ends of spring.
PTO Idler Spring Length
CAUTION: Use care when
releasing idler spring tension.
Keep body parts well away from
idlers when performing this
operation.
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