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OPERATION
LJ60/72 02-02 Operation Section 4-6
OPERATION
© 2004 Alamo Group Inc.
2.5 Front End Weight
A minimum of 20% total tractor weight must be maintained on the tractor front end when the cutter is in the raised
position. Proper weight on the tractor front end is critical to maintain steering control and to prevent the tractor
from rearing up while driving. If the tractor front end is too light, add weight until a minimum of 20% total weight
is reached on the front tires. Front weights and weight carriers can be purchased through an authorized tractor
dealership.
2.4 3-Point Hitch
Lumberjack cutters are considerably heavier than
conventional rotary mowers of the same size. The
tractor 3-point hitch must be rated to lift at least 1650
lbs. if attaching a LJ60 and 2500 lbs. if attaching a
LJ72.
The LJ60 attaches to tractors with a Cat II 3-point hitch
and the LJ72 either a Cat II or III hitch. Refer to the
tractor owner’s manual for the category of the tractor
used. If the hitch does not conform to the ASAE Cat II
or III hitch dimensions, the cutter may not fit properly.
Consult an authorized dealer for possible modification
procedures to mount nonconforming hitches.
Use the correct hitch pins for the hitch category being
used. For a Cat II hitch, 1-1/8” lower and 1” upper
diameter hitch pins are used and Cat III hitches require
1-7/16” lower and 1-1/4” upper diameter hitch pins.
CAT II Implement / Hitch Specifications
Width from outside to outside A-frame............32-3/8"
Quick Hitch width inside lug to lug...................33-5/8"
Height from bottom hitch pin to top pin......................19"
Lower pin diameter.............................................1-1/8"
Upper pin diameter......................................................1"
Linch Pin diameter...............................................15/32"
CAT III Implement / Hitch Specifications
Width from outside to outside A-frame......................38"
Quick Hitch width inside lug to lug...................39-1/4"
Height from bottom hitch pin to top pin......................22"
Lower pin diameter.............................................1-7/16"
Upper pin diameter.............................................1-1/4”
Linch Pin diameter..........................................15/32"
Top link attaches here
1-1/4 O.D. Bushing
must be installed here.
Hitch arms attach here
The power required to operate a cutter is determined by the tractor PTO horsepower. For most cutting conditions,
the LJ60 and LJ72 require a tractor with 50 and 90 HP, respectively. Operating the cutter with a tractor that does
not have adequate power may damage the tractor engine. Exceeding 125 HP may cause cutter damage by
overpowering the unit in heavy cutting conditions.
2.3 Tractor Horsepower