Challenge CHAMPION 305 Instructions And Parts Manual page 37

For initial setup, adjust the valves in the following order:
1. Main System Relief Valve- 1800 psi
2. Knife down sequence valve- 1600 psi
3. Clamp up relief valve- 400-600 psi
4. Pressure reducer valve- 1400max/400min psi
5. Electronic Clamp Pressure- 1400max/400min psi (Optional)
NOTE: Pressure settings fluctuate with oil temperature. Set pressures when the oil is hot..
1. Main System Relief Valve (Figure 27)
This valve maintains the overall hydraulic pressure for the entire system. Factory setting: 1800 psi.
Check Procedure:
a. Open the left access door on front of the cutter.
b. Use the Knife Down command in Maintenance Mode to send the knife and clamp
down. Read the pressure on the gauge when the knife is bottomed on the table. If
the main system gauge (Figure 27) does not read 1,800 psi, an adjustment is
needed.
To Adjust:
a. Loosen the lock nut on the relief valve.
b. Use an Allen wrench to turn the adjusting screw. Turn clockwise to increase the
pressure and counter-clockwise to decrease the pressure.
c. Tighten the lock nut while holding the Allen wrench in place
d. Proceed to readjust the other valves.
2. Knife Down Sequence Valve (Figure 27)
This valve controls the clamp and knife sequence. It keeps the knife up until after the clamp has
made contact. It is mounted at the bottom of the knife cylinder. Factory Setting: 1600 psi.
NOTE: Main System Pressure must be set at 1800 psi before making this adjustment.
Check Procedure:
Figure 27
11.0 Hydraulic System
37