Section 6
Hydraulic System
20425603
5-2005/Rev 0
6-4
6.3 Service and Maintenance Procedures
The extreme duty cycles demanded of the hydraulic system make routine inspection and
maintenance acutely important. Leaks must be detected and remedied as soon as possible.
The operating pressure settings must be checked daily, and the electric motor must be inspected at
regular intervals. It is also possible for the flexible coupling to fail and require replacement. The
procedures for servicing these components are detailed below.
NOTE
Refer to Section 11, Parts List for a complete listing of replacement parts and part
numbers.
Hydraulic Operating Pressure
Hydraulic operating pressure settings should be checked daily and adjusted as necessary. High
and low operating pressure is adjusted at the high and low pressure control valves per the
specifications in Table 6-1.
If the machine is equipped with proportional pressure control, high pressure adjustments are made
from the controller. The following procedure is used for low pressure adjustments.
Table 6-1
Hydraulic Operating Pressure Limits
Adjustment Pressure Limits
Increase Decrease Minimum Maximum
High Pressure Clockwise Counter-clockwise 290 psi (20 bar) 3,000 psi (207 bar)
Low Pressure Clockwise Counter-clockwise 290 psi (20 bar) 800 psi (55 bar)
Redundant Model
High Pressure Clockwise Counter-clockwise 290 psi (20 bar) 3,000 psi (207 bar)
Low Pressure Clockwise Counter-clockwise 290 psi (20 bar) 1,500 psi (103 bar)
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