17
Hydraulic Fluid and Filter
The hydraulic fluid should be changed
every 500 service hours, and the
hydraulic filter should be changed every
250 hours. Hydrostatic components
require extremely clean oil in order to
have a long service life. Extreme caution
must be taken when changing the
hydraulic fluid. Before beginning the pro-
cedure, make sure the machine is in a
clean working environment. Precautions
should be taken to prevent any debris
from entering the hydrostatic system.
To change hydraulic fluid and filter:
1. Locate and remove the hydraulic fluid
drain plug (item 2) through the drain
hole in the belly pan. Drain the used
fluid into a suitable container.
2. Locate the hydraulic filter behind the
operator enclosure, under the left rub-
ber plug (item 3).
3. Clean around the filter head, then
remove the three bolts securing the
cover and remove it.
4. Remove the old filter from the hous-
ing, replace it with a new one, then
reinstall the cover and rubber plug.
5. Reinstall the drain plug, then refill the
hydraulic reservoir (item 4) with
ASV
Premium All Season MV Hydraulic
Oil
, or an approved substitute such
as Chevron Rykon MV. Observe the
hydraulic fluid level sight gauge (5)
located on the back of the hydraulic
reservoir to ensure that the level is
correct (photo D).
6. Once full, start the engine and oper-
ate all hydraulic circuits to work any
trapped air out of the system, then
check the fluid level. If low, add fluid
as necessary until full.
M
MA
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HIIN
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EN
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AN
NC
CE
E
B
2
4
3
C
D
5