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Hydraulic Pump Drive Belt Replacement
1. Park the unit 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. Remove the PTO drive belt (see PTO DRIVE
BELT REPLACEMENT for removal instructions).
3. Lower the mower deck to its lowest cutting
position.
4. Disconnect the PTO clutch wire harness.
5. Loosen and remove the crankshaft bolt (A, Figure
50) and the PTO clutch (B) from the engine
crankshaft.
6. Loosen the inner jam nut (A, Figure 51) on the
idler arm stabilizer.
7. Loosen the nut (B) on the spring anchor eyebolt
(C) to release the majority of the belt tension. Use
caution and remove the nut to completely release
the tension.
8. Remove the old belt and replace it with a new one.
Make sure that the belt is properly seated in the
chevron of the pump drive sprockets (D) and the
crankshaft sprocket (E). See Figure 51 for proper
belt routing.
9. Reinstall the spring anchor eyebolt into the anchor
tab (F) and loosely fasten the nut. Adjust the
anchor eyebolt until a measurement of 5” (12,7
cm) is achieved on the spring coils (G). Tighten
the nuts.
10. Tighten the nuts on the idler arm stabilizer so that
the idler arm is locked into place.
11. Reinstall the PTO clutch (B, Figure 50) on the
engine crankshaft so that the slot in the PTO
clutch lines up with the PTO clutch mounting
tab (C) and secure with the crankshaft bolt (A).
Tighten the crankshaft bolt to 65 ft. lbs (88 Nm).
NOTE: Make sure that the slot in the PTO clutch lines
up with the PTO clutch mounting tab underneath the
engine deck.
11. Reconnect the PTO clutch wire harness and wire
tie the harness out of the way of the PTO clutch
and the pump drive belt.
12. Reinstall the PTO drive belt.
5”
(12,7 cm)
B
A
C
A
C
B
E
H
D
D
G
F
Figure 51. Pump Drive Belt Routing
A. Inner Jam Nut
B. Nut
C. Spring Anchor Eyebolt
D. Pump Drive Sprockets
E. Crankshaft Sprocket
F. Anchor Tab
G. Spring
H. Idler Arm
Figure 50. Removing the PTO Clutch
A. Crankshaft Bolt
B. PTO Clutch
C. PTO Clutch Mounting Tab
Regular Maintenance
Not for
Reproduction