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3.3 Tractor Horsepower
The horsepower required to operate the mower depends on many factors including the vegetation to be cut,
terrain condition, operator experience, and condition of the mower and tractor. For most mowing condition, the
Grass king flail mower require a tractor with at least 90HP. Operating the mower with a tractor that does not
have adequate power may damage the tractor engine.
3.4 3-Point Hitch
The tractor 3-point hitch must be rated to lift at
least 1720 lbs. when attaching a 62 " Grass King
flail and 1870 lbs. when attaching a 74" Grass King
flail.
Grass King flail mowers can attach to tractors with
a CAT I and CAT II hitch. Refer to the tractor
operator's manual for the category of the tractor
used. If the hitch does not conform to ASAE CAT I
or CAT II dimensions, the mower may not fit or
raise properly. Consult an authorized dealer for
possible
modification
nonconforming hitches.
Use the correct hitch pins for the hitch category
being used. For a Cat I hitch, 7/8" lower and 3/4"
upper diameter hitch pins are used and Cat II
hitches require 1-1/8" lower and 1" upper diameter
hitch pins. OPS-F-0036
CAT I Implement / Hitch Specification
Width from outside to outside A-frame.........26-7/8"
Quick Hitch width inside lug to lug ..............27-1/8"
Height from bottom hitch pin to top pin .............. 18"
Lower pin diameter ........................................... 7/8"
Upper pin diameter .......................................... 3/4"
Linch pin diameter ....................................... 15/32"
3.5 Tractor Hydraulics
The Grass King Flail must use a tractor with 540 RPM PTO, single remote hydraulic connection and
three-point hitch. NOTE: Remote hydraulic connection and three-point hitch must work at the same time. A
four-bar folding linkage allows the single hydraulic cylinder to position the flail mower from 45° down for ditch
bank trimming through 90° up for transport.
3.6 Front End Weight
Maintain a minimum of 20% total tractor weight on the tractor front end at all times. Front end weight is critical
to maintain steering ability and to prevent the front end from rearing up. Consult your authorized tractor dealer
for front weights and carriers.
GRASS KING 03/09
© 2009 Alamo Group Inc.
OPERATION
procedures
to
mount
Operation Section 4-6
CAT II Implement / Hitch Specification
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"
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