Changing the Hydraulic Fluid and
Filter
Service Interval:
After the first 250 hours
Every 500 hours thereafter
(Every 250 hours if using Mobil 1 15W50
thereafter)
1.
Disengage the PTO, move the motion-control
levers to the N
EUTRAL
-
LOCK
position, and
engage the parking brake.
2.
Raise the rear of machine up and support it with
jack stands (or equivalent support) just high
enough to allow the drive wheels to turn freely.
3.
Remove the pump-drive belt.
4.
Place a drain pan under the left and right hydros.
5.
Carefully clean area around the filters.
It is important that no dirt or contamination enter
the hydraulic system.
6.
Using a socket, unscrew the filters to remove
and allow the oil to drain.
7.
Before installing the new filters, apply a thin coat
of Toro HYPR-OIL™ 500 fluid on the surface of
the 2 rubber seals.
8.
Install the new filters and torque to 19 N∙m (14
ft-lb).
9.
Move the throttle lever to the S
LOW
position,
shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
10.
Fill the hydraulic system; refer to
Hydraulic-Fluid Level (page 56)
.
Toro HYPR-OIL™ 500 fluid is recommended.
Refer to the chart for an acceptable alternative:
Hydro Oil
Service Interval
Toro HYPR-OIL™ 500 fluid
(preferred)
After first 250 hours
*Every 500 hours thereafter
Mobil 1 15W50
After first 250 hours
*Every 250 hours thereafter
*May need more often under severe conditions.
11.
Remove the drain pan and properly dispose of
the hydraulic fluid and filter according to local
codes.
12.
Install the pump-drive belt.
13.
Start engine and move throttle control to the
F
AST
position.
14.
Move the motion-control levers to full speed and
run for 1 minute.
15.
Shut off the machine, allow the hydros to cool,
and check the fluid level.
16.
Remove the reservoir cap and dipstick from the
hydraulic-fluid tank.
17.
Remove the jack stands.
Important:
Do cot change the hydraulic-system
fluid (except for what can be drained when
changing filter), unless the fluid is contaminated
or has been extremely hot.
Changing the fluid unnecessarily could damage
hydraulic system by introducing contaminants
into the system.
Checking the Deck-Lift Power Unit
Fluid Level
Service Interval:
Every 50 hours
Ensure that the fluid level is slightly above the internal
gear pump in the tank (
).
Note:
If needed, add Toro Premium
Transmission/Hydraulic Tractor Fluid until the
fluid level is slightly above the internal gear pump in
the tank.
g299037
Figure 68
1.
Fluid level
2.
Fill cap
Changing the Deck-Lift Power Unit
Fluid
Service Interval:
Yearly or before storage
1.
Park the machine on a level surface, disengage
the blade-control switch, and engage the parking
brake.
2.
Lower the mower deck to the 2.5 cm (1 inch)
height of cut.
57
Summary of Contents for Air Cool Z Master 74090
Page 69: ...g008623 Hydraulic Schematic Rev A 69 ...
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