SECTION 9
HYDRAULIC SYSTEM
Jan 2003
p. 9-4
80073463
9.2.2 Hydraulic System Pressure Protection
Besides the HI-LOW Pressure Control Valves, the hydraulic system
pressure is limited by the main relief valve (3). The operating hydraulic
pressure is indicated by hydraulic gage (4).
Pressure Adjustment
Hyd. Pressure Bar (psi)
Control Valve
Increase Decrease Maximum Minimum
High
Pressure
1 Clockwise Counterclockwise 207 (3,000) 1.7 (25)
Low
Pressure
2 Clockwise Counterclockwise 103 (1,500) 1.7 (25)
Main
Relief
3 Fixed Fixed 234 (3,400)
(Not
applicable)
NOTE
Do not adjust the HI pressure control to pressures greater than
207 bar (3,000 psi). Doing so will cause the main relief to open
limiting hydraulic pressure to 234 bar (3,400 psi). Also due to
excessive opening of the main relief valve will result in
significant wasted heating of the hydraulic oil, and the decrease
of water flow performance.
9.3 Motor/Hydraulic Service Maintenance
The hydraulic oil filter should be checked daily and replaced if the
pressure gage reads over 40 psi. The hydraulic oil should be replaced
every 2000 hours or yearly, whichever occurs first. For hydraulic oil and
filter maintenance, see Section 10, Recirculation System.
The hydraulic system components that require periodic maintenance are
the motor and the manifold. The motor needs to be serviced every 5000
hours of use. The operating pressure settings of the manifold needs to
be checked daily and adjusted if necessary.
Recommended Tools: Manual Grease Gun
Open End Wrench 14mm (9/16”)
Rags
Parts: Bearing Grease, SRI #2 or equivalent
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