Servis-Rhino EC72 manual Tractor Horsepower, Point Hitch, Front End Weight, Power Take Off PTO

OPERATION

3.3 Tractor Horsepower

The power required to operate a mower is determined by the tractor PTO horsepower. For most mowing conditions, the EC72 mower requires a tractor with at least 30 HP. Operating the mower with a tractor that does not have adequate power may damage the tractor engine. Exceeding 75 HP may cause mower damage by overpowering the unit in heavy cutting conditions.

OPERATION

3.4 3-Point Hitch

The tractor 3-point hitch must be rated to lift at least 700 lbs.

The EC72 mower is designed to be mounted on a tractor with a CAT I 3-point hitch. Refer to the tractor operator’s manual for the category of the tractor being used. If the hitch does not conform to ASAE CAT I dimensions, the mower may not fit or raise properly. Consult an authorized dealer for possible modification procedures to mount non- conforming hitches.

Depending on the hitch category, certain size pins are used to attach the mower to the tractor. CAT I hitches require 7/8” lower and 3/4” upper diameter hitch pins.

3.5 Front End Weight

Standard Hitch

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

3.6 Power Take Off (PTO)

This mower is designed to operate at a PTO speed of 540. Most tractors operate at either 540, or a combination of 540 and 1000 RPM PTO speeds. The operating speed of the mower and tractor can be determined by the number of splines on the driveline yoke and PTO output shaft. Those operating at 540 RPM will have a 6-spline shaft and those operating at 1000 RPM will have a 21-spline shaft. Note: The mower will not operate on tractors equipped with a 1000 RPM 21-spline or 1000 RPM 20-spline, 1-3/4” shaft. Refer to the tractor owner’s manual for instructions to change PTO speeds on models that operate at more than one 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. An authorized tractor dealer can provide the over-running clutch and its installation if needed. OPS-R- 0066

EC72 03/08 Operation Section 4-6

© 2008 Alamo Group Inc.