Land Pride RCB6610 Manuale Utente

Pagina di 66
34
Section 3: Operating Instructions
RCB6610 & RCBM6610 Series 2 S/N 944730+ Rotary Cutters   330-584M
11/11/12
Rephasing Lift Cylinders
The lift cylinders may, after a period of time, get out of 
time or phase. The effects of this can be seen when one 
deck of the cutter is higher or lower than the other 
because its lift cylinder is retracted more than the other lift 
cylinder. Also, tractors with pressure detents do not allow 
hydraulic systems to “automatically” rephase at the top of 
the lift cycle. This must be done manually or the 
rephasing cylinders will not function properly.
To rephase lift cylinders manually, raise cutter completely 
up and hold tractor hydraulic lever on for several seconds 
more to give cylinders time to rephase. This should be 
done each time the cutter is raised and whenever the 
decks are uneven. 
Momentarily reversing the hydraulic lever immediately 
after rephasing allows the cylinders to retract about 1/2" 
and will help maintain a level cutter during transport.
Select Gear Range
Optimum ground speed depends on density of material 
being cut, horsepower rating of tractor, and (in some 
cases) terrain. Always operate tractor at cutter’s 
full-rated PTO speed in a gear range that allows the 
cutter to make a smooth cut without lugging the tractor 
down, usually between 2 to 5 mph. Loss of PTO speed 
will allow the blades to hinge back and result in ragged, 
uneven cutting.
Engage Blades
1.
Select a gear range that will allow cutter to make a 
smooth cut without lugging the tractor down. See 
“Select Gear Range” above for instructions.
2.
With wing lowered, increase throttle to a speed just 
enough to get the cutter started without stalling 
tractor while slowly engaging PTO. Use tractor’s PTO 
soft start option if available.
3.
Ensure all power shafts are rotating and cutter is not 
vibrating excessively after ramping up to full PTO 
speed for at least 3 seconds. If excessive vibration 
continues after 3 seconds at full PTO speed, 
disengage PTO immediately, shut down tractor, and 
remove switch key. Wait for blades to come to a 
complete stop before dismounting tractor.
4.
Investigate the cause if cutter was shut down due to 
excessive vibration. See “Blade Operation 
Inspection” 
on page 31 f
or detailed instructions. 
5.
Periodically, shut tractor down properly and dismount 
to do an inspection. Refer to “Tractor Shutdown 
Procedure” 
on page 14 
for proper shut down 
procedure.
IMPORTANT: Cutter blades can lock-up against 
each other during start-up and shut-down especially 
if tractor’s PTO engagement is “INSTANT ON” and 
“INSTANT OFF”. Follow Blade Engagement and 
Blade Disengagement instructions to help eliminate 
blade lock up.
6.
Periodically, shut tractor down properly and dismount 
to do an inspection. Refer to “Tractor Shutdown 
Procedure” 
on page 14 f
or proper shut down 
procedure.
7.
Dismount tractor and check for objects wrapped 
around blade spindles. Block deck up before 
removing objects. 
8.
Frequently inspect cutter for loose bolts and nuts. 
Tighten all loose hardware as indicated in the 
“Torque Values Chart” on page 62.
Disengage Blades
1.
Slowly decrease throttle speed until engine idle 
speed is reached.
2.
Disengage PTO.
3.
Stay on the tractor until the blades have come to a 
complete stop. Always place tractor in park or set 
park brake, shut tractor engine off, and remove 
switch key before dismounting.