Crescent CS7010 - Page 306

306Service Manual – CS7010™ 52 - Hopper System
29. Remove the cap from the Lower Cylinder Fitting.
30. Remove the plug from the “UP” Hydraulic Hose
and reconnect the “UP” Hydraulic Hose to the
Lower Cylinder Fitting.
31. Run the hydraulic cylinder ram up and down
several times using the hopper raise and hopper
lower buttons to check for correct function.
Note: There is a velocity fuse inside the
lower (down) hydraulic cylinder
port that will shut off the ow of
oil through the tting if the oil ow
rate exceeds 1.5 Gallons per minute.
This is to prevent the hopper from
dropping down if the “up” hydraulic
hose or lower cylinder tting fails. If
the ram fails to retract downward,
it could be due to the velocity fuse.
Let the hydraulic system sit idle for
a few moments to allow the velocity
fuse to reset, then try retracting the
ram again.
32. Remove the wire ties and reconnect the cylinder
ram and prop rod to the hopper lift weldment.
Make sure the sleeve bearing and the two ange
bearings are not damaged and are installed
correctly.
33. Raise the hopper and check the position of the
Upper Cylinder Fitting and “DOWN” Hydraulic
Hose.
• The Upper Cylinder Fitting should be
positioned vertically and with enough
clearance so it doesn’t contact the adjacent
frame surfaces.
• The “DOWN” Hydraulic Hose should be
positioned so it has adequate clearance in the
frame cutout.
Loosen and reposition the Upper Cylinder
Fitting and “DOWN” Hydraulic Hose as
necessary to avoid any abrasion or damage.
“UP”
Hydraulic
Hose
Lower
Cylinder
Fitting
Velocity Fuse
(inside lower
cylinder tting)
Upper
Cylinder
Fitting
“DOWN”
Hydraulic
Hose