Toro Z Master 4000 Series - Replacing the Hydraulic Pump-Drive Belt

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Figure 77
Replacing the Hydraulic
Pump-Drive Belt
1. Park the machine on a level surface, disengage
the blade-control switch (PT O), and engage the
parking brake.
2. Shut of f the engine, remove the key , and wait
for all moving parts to stop before leaving the
operating position.
3. Remove the mower belt; refer to Replacing the
Mower Belt ( page 58 ) .
4. Raise the machine and support it with jack
stands.
5. Use a 1/2-inch ratchet or breaker bar in one
of the square holes in the idler arm to remove
tension on the idler spring ( Figure 78 ).
6. Remove the existing belt from the idler pulley , 2
hydraulic-pump-drive pulleys, and engine pulley
( Figure 78 ).
7. Install the new belt around the idler pulley ,
engine pulley , and 2 hydraulic-pump pulleys
( Figure 78 ).
8. Using the 1/2-inch ratchet or breaker bar in one
of the square holes, install the idler spring.
Note: Ensure that the spring ends are seated
in the anchor grooves.
9. Install the mower belt; refer to Replacing the
Mower Belt ( page 58 ) .
g334847
Figure 78
1. Idler pulley 6. Right hydraulic-pump
pulley
2. Square hole in the idler
arm for the ratchet
7. Mower belt
3. Engine pulley 8. Idler-spring post
4. Idler arm
9. Left hydraulic-pump pulley
5. Hydraulic pump-drive belt
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