Hydraulic System Maintenance; Changing The Hydraulic Transmission Fluid - Toro 23515 Operator's Manual

Hydraulic System
Maintenance
Changing the Hydraulic
Transmission Fluid
Service Interval: Every 100 hours
1. Raise the tines, stop the machine, stop the engine, and
disconnect the spark-plug wire.
2. Drain the fuel from the fuel tank.
3. Slide the oval locking rings on the handle upward and
fold the handle toward the engine.
4. Slowly lift the front of the machine until the back of the
machine and weight pockets are resting on the ground.
Note: Using 2 people or an overhead hoist to lift the
machine will make this easier.
5. Stabilize the machine with an overhead hoist.
CAUTION
If you do not securely stabilize the front of the
machine, the machine could fall on you during
service, injuring you.
Ensure that you use an overhead hoist to hold
it up securely.
6. Remove the transmission from the machine
Note: It will take 2 people or a second hoist to safely
remove the transmission.
Figure 31
1. Self-propel-bail cable
2. Idler pulley and
transmission-drive belt
3. Front-axle-chain sprocket
A. Disconnect the self-propel-bail cable from the
transmission.
(Figure
4. Drive chain
5. Mounting hardware (7
locations)
B. Remove the drive belt from the transmission
pulley by loosening the nut on the idler pulley.
C. Remove and retain the connecting link from the
front-axle-chain sprocket and remove the chain.
D. Loosen the drive chain idler sprockets on each
side of the machine.
E. Remove and retain the connecting link from the
drive chains, and remove the drive chain from the
transmission sprockets.
F. Support the transmission, remove and retain
its mounting hardware, and carefully lower the
transmission to the ground.
7. Carefully clean the area around the expansion tank and
oil-fill port.
Important: Ensure that no dirt or contamination
enters the hydraulic system.
8. Remove and retain the oil-fill port fitting and position
the transmission so the oil will drain completely out
of the housing.
9. When all the oil has drained from the transmission,
remove and retain the #10-32 x 1/2 inch self-tapping
screw and ratchet fastener holding the expansion tank
to the housing.
10. Remove the expansion tank and drain the oil.
Note: Do not remove the vent cap from the tank.
Note: Do not remove the tank hose or O-ring unless
31).
you need a replacement.
11. Inspect the belt, pulleys, sprockets, and bearings;
replace them as required.
12. Install the previously removed expansion tank by first
inserting the hose into the tank.
13. Place the tank opening over the O-ring and push down
to ensure a proper seal.
14. Install the #10–32 x 1/2 inch self tapping screw and
torque it to 2.8 N-m (25 in-lb).
15. Fill the transmission at the oil-fill port until the oil level
is 13 to 32 mm (1/2 to 1-1/4 inches) below the top
of the fill port.
Note: Use Toro Premium Hydro Oil. Mobil 1 15W50
is an acceptable alternative.
16. Install the previously removed oil-fill port fitting.
17. Install the previously removed transmission.
A. With the transmission belt on the engine pulley
and the idler pulley, loosely install the transmission
using the previously removed mounting hardware.
B. Install the transmission belt on the transmission
pulley.
C. Install the drive chains onto the idler and
transmission sprockets.
25