Alamo 7191852C manual 3.7 3-PointHitch, Hydraulics, Front End Weight, Operation

OPERATION

OPERATION

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”

3.8 Hydraulics

The PA91 is available with either a Semi or Totally Independent hydraulic system complete with rotor rotation control. The semi-independent system takes its power from the tractor external hydraulic supply while the fully independent system is operated by an extra lever on the control console, which allows selection of rotor rotation.

3.9 Front End Weight

A minimum of 20% total tractor weight must be maintained on the tractor front end at all times. Front end weight is critical to maintain steering control and to prevent the tractor from rearing up while driving. If the 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. OPS-U- 0005

PA91 02/08 Operation Section 4-8

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