Bleeding The Hydraulic System - Toro 74882 Operator's Manual

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3
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Figure 48
1. Apply a thin coat of oil on the surface of the rubber
seal of each filter.
2. Turn the filter clockwise until rubber seal contacts the
filter adapter then tighten the filter an additional 3/4
to 1 full turn.
3. Repeat for the other filter
4. Install the filter guards over each filter as previously
removed. Use the three screws to secure the filter
guards.
5. Verify the vent plugs are removed before adding the oil.
6. Slowly pour the specified oil through expansion
reservoir until oil comes out of one of the vent plug
holes.
7. Install the vent plug. Torque the plug to 20.3 N-m
(180 in-lb).
8. Continue to add oil through the expansion reservoir
until oil comes out of the remaining vent plug hole on
the second transmission.
9. Install the vent plug. Torque the plug to 20.3 N-m
(180 in-lb).
10. Continue to add oil through the expansion reservoir
until it reaches the FULL COLD line on the expansion
reservoir. Proceed to the Bleeding the Hydraulic
System section.
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G008748
Important: Failure to perform the Bleeding
the Hydraulic System procedure after changing
hydraulic filters and oil may result in irreparable
damage to the transaxle drive system.

Bleeding the Hydraulic System

1. Raise the rear of machine up and support with jack
stands (or equivalent support) just high enough to
allow drive wheels to turn freely.
1. Jacking points
2. Go to the operator's position. Start the engine and
move throttle control ahead to 1/2 throttle position.
Disengage parking brake.
A. Move the bypass levers into the pushing the
machine position; refer to the Pushing the
Machine by Hand section in Operation. With the
bypass valves open and the engine running, slowly
move the motion control levers in both forward
and reverse (5 or 6 times).
B. Move the bypass levers into the operating
the machine position. With the bypass valve
closed and the engine running, slowly move the
directional control in both forward and reverse
directions (5 to 6 times).
C. Stop the engine and check the oil level in the
expansion reservoir. Add the specified oil as until
it reaches the FULL COLD line on the expansion
reservoir.
3. Repeat step 2 until all the air is completely purged from
the system.
Note: When the transaxle operates at normal noise
levels and moves smoothly forward and reverse at
normal speeds, then the transaxle is considered purged.
4. Check the oil level in the expansion reservoir one last
time. Add the specified oil as until it reaches the FULL
COLD line on the expansion reservoir if necessary.
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G010333
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Figure 49