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16 Operation
15916 (Rev. 3/30/2007)
ATTACHING CUTTER TO TRACTOR
(PULL-TYPE MODELS)
The cutter is shipped with a 1-3/8" PTO spline. The
horizontal distance between the end of the tractor PTO
shaft and the drawbar hitch point should be 14". This
distance must not vary more than plus or minus one
inch (±1") or the drive may be damaged when turning.
Adjust tractor drawbar to obtain the desired drawbar to
hitch point distance. On some tractors, a drawbar kit
must be used to obtain the required dimension. Check
with your tractor dealer if you encounter problems.
Raise cutter tongue to tractor drawbar height with jack
provided and attach with a 3/4" or larger high-strength
drawbar pin. Retain pin to keep it in place.
Connect cutter driveline to tractor PTO shaft, making
sure the spring-activated locking pin slides freely and is
seated firmly in tractor PTO spline groove.
Adjust H-frame bearing height to ensure front driveline
is parallel to ground.
Remove parking jack from tongue. Attach to frame rail
storage with top forward. Always attach jack to tongue
to hold it up when disconnecting it from tractor.
Adjust drive shaft carrier bearing (2), Figure 6, verti-
cally in H-frame until driveline is as straight as possible
between tractor PTO and cutter gearbox.
Cutting Height Adjustment for D80
Pull-Type Cutter (Figure 6)
Place tractor and cutter on a level surface.
Cutting height is raised and lowered with height adjust-
ment crank (3) or optional hydraulic cylinder. Front to
rear attitude is set with the compression link (1). The
blade is approximately 9-1/4" below cutter deck. Select
a cutting height, EXAMPLE 3".
Raise front end of deck with a jack to take the compres-
sion member (1) out of compression and remove the
bolt connecting it to the tongue.
Raise front end of deck until both sides are 12-1/4"
above the ground and block underneath to maintain
this distance.
Raise rear end of deck until it is from 13-3/4" to 14"
above the ground.
Connect compression member (1) to tongue. It may be
necessary to raise or lower rear of deck to align hole.
Remove the blocks from under the deck and position
each side skid 1/2" above the ground.
This complete procedure must be followed to properly
set a new cutting height. Raising rear of deck with
crank without changing the compression link position
will result in an incorrect front-to-rear attitude setting.
Figure 6. Cutting Height Adjustment - D80
(Pull-Type Model)
PRE-OPERATION CHECK LIST
(Owner’s Responsibility)
___ Check that cutter is properly and securely
attached to tractor.
___ Make sure driveline spring-activated locking pin
slides freely and is seated firmly in tractor PTO
spline groove.
___ On pull-type cutter, make sure the pin to prevent
crank detachment is installed.
___ Set tractor PTO at 540 rpm.
___ Make sure gearbox is full to fill plug with SAE
90W gear lube.
___ Lubricate all grease fitting locations.
___ Check that all hardware is properly installed and
secured.
___ Check to ensure blades are sharp and secure
and cutting edge is positioned to lead in a
counter-clockwise rotation.
___ Check that all shields and guards are properly
installed and in good condition.
___ Check cutting height and attitude adjustment.
___ Place tractor PTO and transmission in neutral
before attempting to start engine.
___ Inspect area to be cut and remove stones,
branches or other hard objects that might be
thrown, causing injury or damage.
___ Inspect chain shielding and replace any damaged
or missing links.
STARTING AND STOPPING CUTTER
Cutter operating power is supplied from tractor PTO.
Refer to your tractor manual for PTO engagement and
disengagement instructions. Always operate PTO at
540 rpm. Know how to stop tractor and cutter quickly in
case of an emergency.
When engaging PTO, the engine rpm should always be
low. Once engaged and ready to start cutting, raise
PTO speed to 540 rpm and maintain throughout cutting
operation.
M3866
1. Compression member
2. Carrier bearing
3. Adjustment crank