Drive System; Front Drive Actuator - Toro 500 EFI Service Manual

Drive System

GENERAL INFORMATION
All gear cases are tagged beneath a cover bolt. This tag is
marked with a production date code, sequence code, and
a ratio code. All gear cases are 4.0:1 ratio.
The die-cast aluminum housings have been assembled
with thread-rolling screws (trilobular). When assembling
with these screws, start the screws carefully into the
housing; then use the following torque values.
Size New Housing
M6 (Torx T-30 Recess) 9 ft-lb
M8 (Torx T-40 Recess) 28 ft-lb

NOTE: Never reuse a lock nut. Once a lock nut has
been removed, it must be replaced with a new lock
nut.

Front Drive Actuator


NOTE: The actuator is not a serviceable compo-
nent. If it is defective, it must be replaced.

NOTE: The actuator will operate only when the igni-
tion switch is in the ON position.
The front drive actuator is located on the right side of the
front drive input housing. With the engine stopped and
the ignition switch in the ON position, a momentary
"whirring" sound can be heard each time the drive select
switch is shifted. If no sound is heard, see the Electrical
System section. If the actuator runs constantly or makes
squealing or grinding sounds, the actuator must be
replaced.
REMOVING
1. Select LOCK on the drive select switch; then discon-
nect the connector on the actuator harness.
2. Using a T-30 torx wrench, remove the mounting cap
screw from the driveshaft side of the actuator.
3. Remove the mounting cap screw from above the
Reassembled
Housing
8 ft-lb 4. Loosen but do not remove the mounting cap screw at
23 ft-lb
INSTALLING
1. Lubricate the O-rings on the actuator; then ensure all
2. Align the actuator with the selector shaft and slide it

NOTE: Make sure to properly align the differential
lock actuator lever with the hole in the differential
lock plunger.
PR189A
actuator on the suspension side.
the front of the actuator; then slide the actuator to the
rear enough to clear the slotted mounting tab and the
selector shaft. Remove from the right side.
mounting surfaces are clean and free of debris.
forward onto the shaft taking care to engage the cap
screw in the slot of the front mounting tab.
PR190A
AG928
GC002A
145