SECTION 9
HYDRAULIC SYSTEM
Dec 2002
Page 9-5
05114640
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)
NOTE
Do not adjust the HI pressure control to pressures greater than 3,000
psi. Doing so will cause the main relief to open limiting hydraulic
pressure to 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.