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OPERATION
PA92 04/09 Operation Section 4-8
© 2009 Alamo Group Inc.
OPERATION
3.6 Tractor Horsepower
The horsepower required to operate the mower depends on many factors including vegetation to be cut, terrain
condition, operator experience, and condition of the mower and tractor. For most mowing condition, the PA91
flail trimmer requires a tractor with at least 65 HP. Operating the mower with a tractor that does not have
adequate power may damage the tractor engine.
3.7 3-Point Hitch
PA91 boom mowers can attach to tractors with
either a CAT I or 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 II dimensions, the mower may not fit or raise
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 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.
CAT I Implement / Hitch Specification CAT II Implement/ Hitch Specification
Width from outside to outside A-frame......26 7/8” Width from outside to outside A-frame ...... 32-3/8”
Quick Hitch width inside lug to lug ...........27 1/8” Quick Hitch width inside lug to lug............. 33-5/8”
Height from bottom hitch pin to top pin...........18” Height from bottom hitch pin to top pin.............19”
Lower pin diameter ........................................7/8” Lower pin diameter.................................... 1-1/18”
Upper pin diameter .......................................3/4” Upper pin diameter.............................................1”
Lynch pin diameter ....................................15/32” Lynch pin diameter ......................................15/32”