Checking the Hydraulic Lines and
Hoses
Service Interval:
Before each use or daily
Check the hydraulic lines and hoses for leaks, kinked
lines, loose mounting supports, wear, loose fittings,
weather deterioration, and chemical deterioration. Make all
necessary repairs before operating.
Replacing the Hydraulic Filters
Service Interval:
Every 1,000 hours—
If you are using
the recommended hydraulic fluid,
replace the return-hydraulic filter and
charge-hydraulic filter.
Every 800 hours—
If you are not using the
recommended hydraulic fluid or have ever filled
the reservoir with an alternative fluid,
replace the
return-hydraulic filter and charge-hydraulic filter.
Important:
Use of any other filters may void the
warranty on some components.
Changing the Return Filter
The hydraulic system is equipped with a return filter-service
indicator (
). You view the filter-service indicator
through the hole in the floor plate. With the engine running
at operating temperature, check the color of the indicator
as follows:
•
Green indicates normal hydraulic-fluid flow through the
filter.
•
Ref indicates a restricted filter. Change the return filter.
g004132
Figure 148
1.
Hydraulic-filter-restriction indicator
1.
Prepare the machine for maintenance; refer to
Preparing for Maintenance (page 52)
.
2.
At the front of the machine, align a drain pan under
the return filter (
).
g376340
Figure 149
1.
Return filter
2.
Filter head
3.
Remove the filter.
4.
Wipe clean the filter mounting area of the filter head.
5.
Apply a thin coat of the specified hydraulic fluid to the
gasket of the new return filter.
6.
Thread the filter onto the filter head by hand until the
gasket contacts the mounting surface, then rotate the
filter an additional 1/2 turn.
Changing the Charge Filter
1.
Prepare the machine for maintenance; refer to
Preparing for Maintenance (page 52)
.
2.
Tilt the seat; refer to
Tilting the Seat (page 53)
.
3.
At the left side of the machine, align a drain pan under
the charge filter (
73
