Operator's Manual

Hydraulic Drive System (continued)
14. Add hydraulic fluid to the expansion tank until it reaches the fluid line.
IMPORTANT
Do not overfill.
15. Install the expansion-tank cap.
16. Install the skid plate.
17. Install the fuel tank.
18. Start the engine and let it run for about 2 minutes to purge air from the system.
19. Shut off the engine and check for leaks.
Bleeding the Hydraulic Drive System
Bleed the traction hydraulic system whenever you perform service or maintenance on the
hydrostatic transmission or add hydraulic fluid to the expansion tank.
1. Park the machine on a level surface, move the motion-control levers to the N
EUTRAL-LOCK
position, engage the parking brake, and lower the hopper.
2. Shut off the engine, and remove the key. Allow the engine to cool.
3. Check the hydraulic fluid level and add hydraulic fluid as necessary.
4. Support the machine on jack stands, high enough to raise the tracks off the ground.
5. Start the machine. Slowly move the motion-control levers forward and reverse 5 to 6
times.
6. Check the hydraulic fluid level and add hydraulic fluid as necessary.
7. Repeat Step 5 and Step 6 as necessary until all the air is completely purged from the
system.
Note: Purging is complete when you obtain normal forward and reverse speed.
8. Lower the machine and repeat the procedure with the tracks on the ground.
Hydraulic Lift System
Hydraulic Lift Fluid Specifications
Hydraulic-Fluid type: Toro Premium All Season Hydraulic Fluid or
Mobil® 424 Hydraulic Fluid
Hydraulic fluid capacity: 1.4 L (1.5 US gallons)
Use only 1 of the following fluids in the hydraulic system:
• Toro Premium Transmission/Hydraulic Tractor Fluid (refer to your Authorized Service
Dealer for more information)
3451-705A Page 5–26 Maintenance: Hydraulic System Maintenance