Challenge CHAMPION 305 Instructions And Parts Manual page 57

(Both Ends)
Clevis Pin with
1/4-20 Threaded Hole
Proximity Switch
Proximity Switch
Knife Cylinder
6. Remove the clevis pin out of the knife bar and clevis by first removing the front E-style
retaining ring on the pin (Figure 49). The pin has a 1/4-20 tapped hole in it to aid removal of
the pin out of the knife bar and clevis. It may also be helpful to use the pry board to block up
the knife bar, releasing pressure from the pin to make it easier to remove.
7. Now, remove the pin keeper on the lower pin (Figure 49). Then carefully tap the pin out of
the cylinder.
8. Remove the old cylinder. With the shaft of the old cylinder bottomed out, note the dimension
between the top of the cylinder body and the bottom of the cylinder clevis. Also note the
approximate position of the proximity switch actuator. Transfer the proximity switch bracket,
proximity switch actuator, clevis, clevis jam nut, and hydraulic sequence valve assembly onto
the new cylinder and insert it into position on the cutter.
9. Reinstall the lower pin and pin keeper.
10. Install the clevis pin to connect the cylinder to the knife bar and replace the retaining rings.
11. The cylinder shaft can be threaded into the clevis to adjust the position of the knife bar.
When properly adjusted, the distance from the top of the knife bar recess to the table with the
knife in the down position should measure 4-1/8" (103mm), (Figure 50).
E-Ring
Clevis
Jam Nut
Actuator
Bracket
Pin Keeper
Lower Pin
Figure 49
13.0 Repair and Replacement
Hose
Connections
Sequence
Valve
Assembly
57