Brouwer 1570, Operator'S Manual

Page: 27 / 66

Cut-Off: Stop Return Cam, Return Cam Stop
Since the sod is cut to length before the bottom
blade has cut under the full length, a stop return cam
and a return cam stop are provided to assure a
uniform cut length of the first piece of sod.
The stop return cam is mounted on the outer end of
the cut-off cam shaft, and the return cam stop is
mounted to the cutting head frame.
When the return cam reaches the correct position, it
is engaged by the return cam stop. This indicates
the end of the cut and prevents the spring pressure
on the cut-off frame from rotating the cut-off cam
shaft backwards.
A different stop return cam is required for each
length of sod. The part number is stamped on each
stop return cam. Refer to the parts manual for a
complete list.
NOTE
Three cut-off cams are available.
1. The slow lift cam is used for cut lengths under
54” and is easily identified by a letter ‘S’
stamped on the cam.
2. The fast lift cam is used for cut lengths of 54” to
72” and is stamped with the letter ‘F’.
3. The superlift cam is used for cut lengths of more
than 72” and is stamped with the letters ‘FF’.
WARNING
USE THE CYLINDER LOCK FOR THE SAFETY OF
THE OPERATOR, SERVICE MECHANIC, OR
OTHERS WHEN WORKING ON THE HARVESTER
WITH THE CUTTING HEAD RAISED. SEE PG 5-01.
GENERAL OPERATION
Cut-Off Length Adjustment
CAUTION
WHEN CHANGING SPROCKETS TO MODIFY CUT-
OFF LENGTH, THE LENGTH OF THE ROLLER
CHAIN MUST ALSO BE MODIFIED. INCORRECT
CHAIN LENGTH CAN RESULT IN DAMAGE TO
CAMSHAFT.
Idler arm position while setting roller chain
length (with depth cylinder fully extended).
Unhook idler springs from idler arm. Adjust depth
control to thinnest cutting position (cylinder fully
extended). Refer to Page 74 of the parts manual for
sprocket combinations available. Change sprockets
as needed. With idler arm in position shown, cut
chain length as needed. The dimension between the
bottom of the idler arm and the top of the cutting
head frame is critical! If the chain is cut too short, it
could result in a bent camshaft when cutting thin. If
the chain is cut too long, improper chain tension will
result when cutting thick.
Sprocket combinations which are recommended for
various lengths of sod, are approximate only. Final
choice of sprockets must be determined in the field.
In the spring, when the sod is wet, it stretches after it
is cut, while later in the year, when the sod is drier,
the cut length of sod tends to be closer to the ground
cut-off length. Many other criteria may have an effect
on the length of sod after it is cut, such as the type
of soil, age of the sod, type of grass etc.
3-04