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5. Remove the drain plug from the hydraulic reservoir
(located underneath the reservoir), and drain the
reservoir (Figure 92).
Note: The capacity of the reservoir is approximately
75.7 L (20.0 US gal); the capacity of the complete
system is approximately 98.4 L (26.0 US gal).
6. Examine the condition of the O-ring on the drain plug.
Note: Replace the O-ring if it is worn or damaged.
7. Install the drain plug (Figure 92).
Important: Change the hydraulic-pressure
and hydraulic-return filters when you change
the hydraulic fluid; refer to Changing the
Hydraulic-pressure Filter (page 63) and Changing
the Hydraulic-return Filter (page 64).
Filling the Hydraulic-fluid Reservoir
1. Fill the hydraulic-fluid reservoir with the specified
hydraulic fluid until the fluid level is at the midpoint of
the sight gauge (Figure 93).
1. Fill level (midpoint)
2. Sight gauge
2. Clean the fill cap/breather with solvent.
3. Install the fill cap/breather (Figure 93).
4. Start the engine and let it idle for approximately 2
minutes.
5. Stop the engine and remove the ignition key.
6. Check around the pressure and return filters for leaks.
Figure 93
3. Hydraulic fluid
7. Check the drain plug for leaks.
8. Check the level of the hydraulic fluid.
Changing the Hydraulic-pressure Filter
Service Interval: Every 500 hours
Note: You can access the hydraulic-pressure filter from
under the right side of the machine, behind the hydraulic
reservoir (Figure 94).
1. Place a container under the hydraulic-pressure filter
(Figure 94).
1. Container suitable for
hydraulic fluid
2. Sharp object
2. Puncture the bottom of the hydraulic-pressure filter,
and allow the residual hydraulic fluid to drain into the
container (Figure 94).
Note: Use a tapered-center punch or awl to puncture
the filter case.
3. Rotate the hydraulic-pressure filter counterclockwise
and remove the filter (Figure 94).
Note: Discard the filter.
4. Apply a thin layer of the specified hydraulic fluid to
the O-ring of the new filter.
Important: Do not use a filter strap wrench to
tighten the filter. A strap wrench can dent the
filter, causing it to leak.
5. Install the new filter.
Note: Use your hands to tighten the filter an additional
half turn after the filter makes contact with the filter
head.
63
Figure 94
3. Hydraulic-pressure filter
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