CHAPTER 10 PREPARING FOR FIELD OPERATION TRACTOR HITCH ALIGNMENT (Figs. 83 & 84) Position the tractor drawbar hitch hole centerline directly in-line with the tractor PTO Drive Shaft, and secure so as to eliminate any side to side movement of the tractor drawbar. If the tractor drawbar can NOT be positioned in-line, position it toward the left, as close as possible to the centerline of the PTO shaft. It is important to use the 1″ dia. Hitchpin furnished with the Harvester to help center the Harvester Tongue with the tractor drawbar and reduce the amount of side to side movement. Keeping the Tongue in-line and minimizing side to side movement is essential in eliminating drive-line vibration, especially when maneuvering corners.
The front to rear position of the tractor drawbar hitch hole centerline MUST be correct to insure the proper Universal Joint relationship. The tractor drawbar hole should be 16″ (405 mm) from the rear of the 1-3/8 diameter 1000 RPM tractor PTO Shaft, or 20″ (508 mm) from the rear of the 1-3/4 diameter 1000 RPM tractor PTO Shaft.
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1 – Tractor Drawbar* (Top View) 2 – Drawbar Pin Hole In-Line or to Left (as close as possible) of PTO Centerline 3 – 1000 RPM Tractor 1-3/4 PTO Shaft* 4 – 20″ (508 mm) (Center of Hitchpin to End of Shaft)* 5 – 8 to 12″ (203 to 300 mm)* 6 – 13 to 22″ (330 to 560 mm)* (Top of Tongue to Ground) 7 – Tongue Extension
* Tractor MUST comply with ASAE Standard S203 1 – Tractor Drawbar* (Top View) 2 – Drawbar Pin Hole In-Line or to Left (as close as possible) of PTO Centerline 3 – 1000 RPM Tractor 1-3/8 PTO Shaft* 4 – 16″ (405 mm), 1–3/8″ Diameter PTO Shaft* 5 – 15-3/8″ (428 mm) (Center of Hitchpin to End of Shaft)* 6 – 6 to 12″(150 to 300 mm)* 7 – 13 to 22″ (330 to 560 mm)* (Top of Tongue to Ground)
* Tractor MUST comply with ASAE Standard S203
Fig. 83: 1-3/8 PTO 1000 RPM
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Fig. 84: 1-3/4 PTO 1000 RPM
DRAWBAR HITCH CLIPS (Fig. 84) The Hitch Clips MUST be relocated onto the Tongue Extension to provide a 20″ (508 mm) dimension, between the end of the Splined Drive Shaft and the Hitch Pin Hole in the Clips, to match 1000 RPM 1-3/4 tractor PTO Shaft requirements. This Extension is furnished with the 1-3/4 tractor PTO Telescoping Drive.
