Alamo SHD74, SHD96, SHD62 Tractor Horsepower, Point Hitch, Front End Weight, Power Take Off PTO

OPERATION

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 SHD62 mower requires a tractor with at least 20HP, SHD74-35HP, SHD-88-40HP and SHD96-50HP. 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 815 lbs.if attaching a SHD62, 930 lbs. if attaching a SHD74, 1035 lbs. if attaching SHD88, and 1170 lbs. if attaching a SHD96 flail.

SHD mowers can attach to tractor’s 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 can 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	1-1/8”
Upper pin diameter	3/4”	Upper pin diameter	1”
Linch pin diameter	15/32”	Linch pin diameter	15/32”

3.5 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.

3.6 Power Take Off (PTO)

Only operate the mower on a tractor equipped to operate at 540 rpm PTO speed. Tractors operating at 540 rpm will have a 1-3/8” diameter 6-spline PTO shaft stub. Refer to the tractor operator’s manual for operating the PTO at the proper speed.

If operating an older model tractor where the tractor’s transmission and PTO utilize one master clutch, an over- running clutch must be used between the PTO output shaft and the driveline of the mower. Consult an authorized tractor dealer to purchase and install an over-running clutch if needed.

SHD 03/09 Operation Section 4-7

© 2009 Alamo Group Inc.

OPERATION