Flushing The Hydraulic System - Toro Z Master 7500-D Series Service Manual

Flushing the Hydraulic System

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. Ensure that the hydraulic fluid is at normal operating temperature by operating the machine for at least 20
minutes.
2. Park the machine on a level surface, lower the cutting deck, shut off the engine, set the parking brake, and
remove the key from the key switch.
NOTE: Ensure to clean all the hydraulic connections that are disconnected for draining.
3. Drain the hydraulic fluid from the hydraulic tank and transmission.
4. Drain the complete hydraulic system. Drain all the hoses, tube, and components while the system is warm.
5. Remove and replace the hydraulic fluid filter.
6. Inspect and clean the hydraulic fluid tank.
IMPORTANT: Follow all local codes and regulations when recycling or disposing the hydraulic fluid and filters.
7. Connect all the hydraulic hoses, tubes, and components that were disconnected while draining the system.
IMPORTANT: Using other hydraulic fluids could damage the hydraulic system. Use the fluids that are specified in
the operator's manual.
8. Fill the hydraulic tank with the correct quantity of new hydraulic fluid.
9. Prime the hydraulic pumps,
10. Start the engine and operate it at low idle speed for a minimum of 2 minutes. Increase the engine speed to
high idle for a minimum of 1 minute under no load.
11. Raise and lower the cutting deck several times.
12. Shut off the engine and check for hydraulic fluid leaks.
NOTE: Check the hydraulic fluid level in the hydraulic tank and add correct quantity of fluid if necessary.
Refer to the operator's manual.
13. Operate the machine for two hours under normal operating conditions.
14. Check the condition of the hydraulic fluid. If new fluid shows any signs of contamination, repeat steps 1-13
until the fluid is clean.
15. Assume the normal operation and follow the recommended maintenance intervals.
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Table of Contents
DRIVE
see "Priming the Hydraulic Pumps," chapter 7, page 7-15.
Z Master 7500-D Series Service Manual
March 2018 - Digital Edition