Bleeding The Hydraulic System - Toro GrandStand 74558 Operator's Manual

3. Remove hydraulic reservoir cap and temporarily
cover opening with a plastic bag and rubber band to
prevent all hydraulic fluid from draining out.
4. Locate the filter under the fuel tank and place drain
pan under filter (Figure 69).
1. Hydraulic tank
5. Remove the old filter and wipe the filter adapter
gasket surface clean (Figure 70).
6. Apply a thin coat hydraulic fluid to the rubber gasket
on the replacement filter.
7. Install replacement hydraulic filter onto the filter
adapter. Do not tighten.
8. Remove plastic bag from reservoir opening and
allow filter to fill with hydraulic fluid.
9. When the hydraulic filter is full, turn the oil filter
clockwise until the rubber gasket contacts the filter
adapter, then tighten the filter an additional 1/2 turn
(Figure 70).
Figure 69
2. Hydraulic filter
1. Hydraulic filter
2. Gasket
10. Clean up any spilled fluid.
11. Check the fluid in the reservoir, add fluid to the tank
until it reaches the cold baffle of the tank.
Important: Use oil specified or equivalent.
Other fluids could cause system damage.
12. Start engine and let run for about two minutes to
purge air from the system. Stop the engine and
check for leaks. If one or both wheels will not drive,
refer to Bleeding Hydraulic System.
13. Recheck level and add fluid, if required. Do not
overfill.

Bleeding the Hydraulic System

The traction system is self bleeding, however, it may be
necessary to bleed the system if fluid is changed or after
work is performed on the system.
1. Disengage the PTO and set the parking brake.
2. Stop the engine and wait for all moving parts to stop
before leaving the operating position.
3. Raise the rear of the machine up onto jack stands
high enough to raise the drive wheels off the ground.
4. Start the engine and move the throttle control to idle
position.
If the drive wheel does not rotate, it is possible to
assist the purging of the system by carefully rotating
the tire in the forward direction.
5. Check the hydraulic fluid level as it drops add fluid
as required to maintain the proper level.
6. Repeat this procedure for the opposite wheel.
7. Thoroughly clean the area around each of the charge
pump housings.
Checking the Hydraulic Lines
Service Interval: Every 100 hours
48
Figure 70
3. Adapter