Hydraulic System - Challenge CHAMPION 370 XT Operator's Manual

10.0 Routine Maintenance/Adjustments
While lubricating, check pin locks to make sure they are in place and secure (Figure 20) there are a
total of six. The bell crank pins do not require lubrication.
Pin Locks
Figure 20

10.4 Hydraulic System

The Champion Series Cutters have both hydraulic cutting and hydraulic clamping operation. The
cutter is powered by an electric motor coupled directly to a hydraulic pump. The pump has a fixed
flow rate output of 10.5 GPM at 1800 PSI (max. system relief setting) at 1800 RPM.
A hydraulic cylinder powers the clamp. When the cut buttons are depressed, this cylinder pushes on
a bell crank and brings the clamp down (or brings the clamp up to full hydraulic pressure if the manual
foot clamp is down). A hydraulic cylinder connected directly to the knife bar also powers the cut. The
knife sequence valve generates 1600 PSI of backpressure throughout the system to maintain full
clamp pressure during the cut. One big advantage of the hydraulic system is the immediate return of
the knife when the cut buttons are released. Instead of stopping in place, the knife immediately
returns to the upper position.
The hydraulic fluid should be changed YEARLY or EVERY 1000 HOURS of operation.
The oil filter (Challenge part H-227-1) should be changed yearly or whenever any repairs are made to
the hydraulic system.
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