Operator`s manual

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Maintenance section 4 -

MOWER 04/13

MAINTENANCE SECTION

Flail Blades Inspection

Inspect the Blades daily for abnormal wear. REPLACE ALL BLADES on the carrier IMMEDIATELY if any blades have:

• Become bent or deformed from its original shape, or

• Wear inside the blade bolt hole, or

• Any cracks are visible, or

• Deep gouges in the blade’s surface are present, or

• Gouges or chipped areas in the cutting edge are larger than 1/4”(8mm), or

• The material on the leading edge has been worn away by more than 1/4”(8mm)

DO NOT straighten, sharpen, weld or hard-face blades Failure to replace worn or damaged blades may lead to catastrophic failure of

the blades and ejection of the broken part with tremendous force which may cause serious bodily injury or death.

Worn and

Chipped Blade

1/4” Maximum

Always replace blades in sets

• Blades that are damaged may indicate severe service or abuse. If one blade is worn or damaged other blades on the same shaft

will have been subjected to the same severe service or abuse.

• The Flail rotor turns at speeds exceeding 2000 RPM and is dynamically balanced at the factory.

Differences in blade weight between used blades with loss of material from gouges or wear as compared to new blades can cause

severe vibration and damage to the Flail rotor. Always replace blades as complete sets.

CAUTION

Use only genuine Alamo Industrial replacement blades and fasteners. Other blades and fasteners may not meet the

Alamo Industrial requirements and could fail during operation resulting in part being thrown out from under the mow-

er.

DANGER

WARNING

CAUTION

Important

Never attempt to sharpen blades. OPS-U-0044

General Information on Flail Mower Vibration

FLAIL MOWERS - INFORMATION BULLETIN NO. 5

Excessive Vibration

Vibration is a MONSTER and if allowed to continue unchecked, can cause the complete break-up of a machine in a very short time.

A properly operated Flail Mower will produce very little vibration. If vibration does occur, the mower should be stopped and the trouble

corrected, as warranty does not cover failures resulting from continued operation after something happens to cause the mower to

vibrate excessively.

Vibration is caused by a rotating part which is out of balance. This could be the cutter shaft or, on those models having a universal slip

joint assembly drive shaft, from the drive shaft.

If the two extreme ends of the drive shaft, (the splined yokes which t on the tractor power take off shaft and on the mower gear box

driven shaft), are not parallel, vibration will be evident. This is because of the mechanics of a universal drive wherein the rotational

speed thru a universal joint is not uniform. If the ends of a universal drive shaft are parallel, the uneven rotation effect is cancelled out

and the machine being driven will be driven at a uniform rate of speed. However, if the ends are not parallel, the uneven rotation effect

may be multiplied, resulting in a speeding up and slowing down of the entire mower system (gear box, extension shaft, pulleys, belt,

and cutter shaft) each revolution. This effect can be readily noticed if the mower, while running, is raised to an extreme height on the

tractor lift.

For smoothest operation, the tilt of the mower should be adjusted (on a 3-point hitch, by adjusting the length of the top link between

the tractor and the mower) so that the ends of the drive shaft are parallel when the mower is down in operating position. Raising the

mower while running, to extreme heights on the lift should be avoided.

To check where the vibration is originating, rst be sure the ends of the universal drive shaft are parallel. Then, if vibration is still pres-

ent, remove the drive belt and run the mower. If vibration is still present, it most likely is coming from and caused by a bent drive shaft.