Section 1: Assembly & Set-up
7/31/20
RC4620 & RCM4620 Rotary Cutters 331-936M
27
9. If driveline hanger (#1) is adjusted fully up and needs
to adjust higher, remove carriage bolts (#4) and
reattach hanger to the upper two square holes (#2)
with existing flat washers, lock washers, hex nuts,
and carriage bolts (#4). Continue to adjust hanger to
underside of driveline.
10. Draw nuts securing carriage bolts (#4) up snug and
rotate driveline hanger (#1) down. If hanger makes
contact with driveline (#5), readjust hanger down
until it misses the driveline.
11. Tighten nuts for carriage bolts (#4) to the correct
torque.
12. Rotate driveline hanger (#1) down.
Driveline Clearance Check
Check driveline for adequate clearance under all ranges
of cutter height.
1. With driveline attached to the tractor, slowly raise and
lower cutter to its upper and lower limits while
observing clearances between hitch and driveline.
2. Adjust tractor drawbar height and length if driveline
interferes. See
on page 15 for
correct placement of tractor drawbar.
3. To purge hydraulic lift system of trapped air. See
IMPORTANT:
Always rotate driveline hanger down
after hook-up to prevent driveline damage.
NOTE:
The lift cylinders should raise the cutter up
while pulling the control lever back and lower while
pushing the lever forward. Switch connections at the
duplex outlet if lift control lever works opposite.
Purge Hydraulic System
DANGER
!
To avoid serious injury or death:
Never remove or install a folding wing cylinder with cylinder
rod retracted and wing folded-up. The wing is unstable
without its folding cylinder and can suddenly fall. Also, air
trapped in a new or repaired cylinder will drop the wing
suddenly when lowering the wing. Either situation can render
the cutter inoperable and cause serious bodily injury or death.
WARNING
!
To avoid serious injury or death:
Be sure center and wing decks are lowered to the ground and
all hydraulic pressure is relieved before disconnecting any
hydraulic lines or fittings to purge the hydraulic system.
Be sure tractor reservoir is filled properly before
operating hydraulic cylinders. If tractor reservoir is low on
hydraulic fluid, there is a chance of drawing air into the
system causing jerky or uneven cylinder movements.
The wing deck lift cylinder may be purged as follows:
1. To purge the two wing lift cylinders, lower wings until
resting on the ground, shut tractor down properly and
then move tractor hydraulic wing lift control lever back
and forth several times to relieve all hydraulic
pressure in the system.
2. Loosen hydraulic hose fittings slightly at each wing lift
cylinder to allow air and fluid to escape.
3. Restart tractor. Slowly activate tractor control lever to
retract wing lift cylinders and to purge trapped air.
4. Once air is purged from the hydraulic system for the
wing lift cylinders, tighten hydraulic hose fittings.
5. To purge the three deck lift rephasing cylinders, fully
extend rephasing cylinders with tractor hydraulic
deck lift control lever. Hold control lever on long
enough to give the hydraulic system time to purge of
any trapped air in the lines and rephasing cylinders.
