ASV ST50 Scout, Operation And Maintenance Manual

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Hydraulic Fluid / Filter Change
Hydrostatic components require
extremely clean oil in order to
have a long service life. Use
extreme caution when changing
the hydraulic oil. Introducing dirt
or debris could be detrimental to
the hydraulic system. ASV rec-
ommends service intervals of
500 hours for hydraulic fluid and
250 hours for hydraulic filter.
To change the hydraulic fluid:
1.
Remove the belly pan that
mounts between the torsion
axles to access the hydraulic
tank drain.
2. Locate the hydraulic system
drain in the center of the
exposed portion of the tank
just in front of the rear tor-
sion axle.
3. Remove the drain plug using
the correct size wrench to
avoid damaging the drain
plug. (fig. 1)
4. Drain the hydraulic fluid into
a suitable catch container.
5. Remove access cover in the
cargo bed behind the pas-
senger seat to access the
hydraulic reservoir. (fig. 2)
6. Locate the hydraulic filter
housing beneath the access
cover.
7. Thoroughly clean around the
filter housing to prevent dirt
or debris from entering the
system.
8. Remove the bolts securing
the filter housing cover to
the housing, then remove
the cover. (fig. 3, 4)
9. Remove the filter from the
housing and replace it with a
new one. (fig. 5)
10. Reverse steps 3 and 8 to
close the system.
11. Open the passenger side
access door to the rear con-
sole enclosure (behind the
seats) and remove the
hydraulic oil filler cap. (fig. 6)
12. Fill the hydraulic system with
ASV Premium All Season
MV Hydraulic Oil or equiva
lent until the full mark on the
dip stick has been reached
(fig. 6, 7).
13. Start the engine and operate
the hydraulic circuits to work
any trapped air out of the
system.
• Drive the machine forward
and backward.
• Turn the steering wheel left
and right while in motion.
MAINTENANCE
Hydraulic System
37
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