Toro Groundmaster 31900, Service Manual

Page: 141 / 355

Flushing the Hydraulic System
IMPORTANT
If a component failure occurs in the traction circuit; refer to
Filtering the Closed-loop Traction Circuit (page 5–57) for additional
information.
IMPORTANT
Flush the hydraulic system whenever there is a severe component
failure or the system is contaminated (for example, the fluid appears
milky, black, or contains metal particles).
1. Park the machine on a level surface, lower the cutting unit (or attachment),
engage the parking brake, set the key switch to the O
FF
position and remove
the key from the key switch.
2. Read and adhere to the information provided in General Precautions for
Removing and Installing the Hydraulic System Components (page 5–52) .
CAUTION
Flush the hydraulic system with the hydraulic fluid as warm as
possible, but to prevent additional system damage, Do Not operate a
machine with contaminated hydraulic fluid to warm the fluid before
draining.
IMPORTANT
Follow all local codes and regulations when recycling or disposing
the hydraulic fluid and filters.
3. Drain the hydraulic tank into a suitable container; refer to the traction unit
Operator’s Manual .
4. Drain the hydraulic system hoses, tubes, lift cylinders and other components
from low points in the system.
5. Remove and replace the hydraulic-fluid filter; refer to the traction unit
Operator’s Manual .
6. Inspect and clean hydraulic tank. Remove the hydraulic tank if necessary;
refer to Hydraulic Tank (page 5–64) .
7. Connect all the hydraulic hoses, tubes, and components that were
disconnected while draining the system; refer to Installing Hydraulic Hoses
and Tubes (O-Ring Face Seal Fitting) (page 5–7) .
IMPORTANT
Using other hydraulic fluids could damage the hydraulic system. Use
the hydraulic fluids that are specified in the traction unit
Operator’s
Manual .
Groundsmaster ® 3200, 3300 and 3310 Page 5–55 Hydraulic System: Service and Repairs
19240SL Rev A