Aligning The Pto-Drive Pulley - Toro 74310 Operator's Manual

CAUTION
Raising the mower deck for service or maintenance
relying solely on mechanical or hydraulic jacks
could be dangerous. The mechanical or hydraulic
jacks may not be enough support or may
malfunction allowing the unit to fall, which could
cause injury.
Do not rely solely on mechanical or hydraulic jacks
for support. Use adequate jack stands or equivalent
support.
1. Stop the machine and move the speed-control lever
to the N position.
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2. Disengage the PTO, engage the parking brake, shut off
the engine, and wait for all moving parts to stop.
3. Remove the electrical connection from the seat safety
switch, located directly in front of the seat-switch
assembly.
4. Raise the frame and place on jack stands so that drive
wheels can rotate freely.
Note: You must make the neutral adjustment with
the drive wheels turning.
5. Temporarily install a jumper wire across the terminals
in the connector of the wiring harness.
6. Start the engine.
7. Run the machine at least 5 minutes with the
speed-control lever at full forward speed to bring the
hydraulic system oil up to operating temperature.
8. Return the speed-control lever to the N
position.
9. To obtain the N
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right pump-control-rod linkages that connect the
steering control to the pump-control arms until the
wheels stop or creep slightly in reverse
10. Adjust the left pump linkage by rotating the
tracking-adjustment knob.
11. Adjust the right pump linkage by using a wrench to
turn the double nuts on the assembly
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position, adjust the left and
(Figure 56).
(Figure 56)
1. Rotate the tracking knob
on left side.
12. Move the steering levers to the reverse position. While
applying slight pressure to the levers, allow the steering
levers to return to N
Note: The wheels must stop turning or slightly creep
in reverse.
13. Shut off the engine and wait for all moving parts to
stop.
14. Remove the jumper wire from the wire-harness
connector and plug the connector into the seat switch.
15. Lower the machine from the jackstands.

Aligning the PTO-Drive Pulley

Align the PTO-drive pulley for any of the following
conditions:
•
The blower has been removed or replaced.
•
The engine mounting bolts have been loosened or the
engine has been moved or replaced.
•
The jackshaft mounting bolts have been loosened or the
jackshaft has been moved or replaced.
1. Stop the machine and move the speed-control lever
to the N
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2. Disengage the PTO, engage the parking brake, shut off
the engine, and wait for all moving parts to stop.
3. Remove the fuel-tank mounting nuts and swing out
the fuel tank.
4. Verify that the blower is installed and tightly secured.
5. Loosen the 4 engine mounting bolts.
6. Unhook the pump-belt tension spring.
7. Loosen the 4 jackshaft mounting bolts.
8. Measuring from the blower pulley as a baseline, move
the engine and jackshaft until the rear surface of all 3
47
Figure 56
2. Rotate the double nuts on
right side.
.
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position.