Motor Triple mowes bad

[hanysmiglanc]

Hi when I mow the lawn the grass is very striped and not cut into small pieces. could someone tell me why and how can i fix it?

[hdtrust]

Hi send me some photos of your machine and the lawn

[charlie]

You need to compress the photo files to less than 4MB.

[hanysmiglanc]

My machine is Ransomes Motor Triple MK4M with kubota z600-b engine. It has 4 blade gang. Here’s the photos

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[charlie]

Are the stripes across whole width of area covered by machine or only one of the cutting heads?

[chris]

I would suggest that you reset the cylinders to the bottom blade, they should cut paper(not newspaper) you should get a clean cut along the whole of the blade . You might need to lap the cylinders if you cannot achieve this.
Reduce your forward speed and increase your cylinder speed if you can.

Chris

[hanysmiglanc]

I can’t increase the cutting speed but i can’t cut any paper with that even after adjusting. This happens on all cylinders. And can you do backlapping without paste?

[chris]

We would use grinding paste and diesel or parrafin or light oil . If they are really bad they ought to be re ground.but lapping should improve it.
Is your location a remote one or could you aquire some paste on the internet or a local supplier or mower repair place?

[hanysmiglanc]

I can aquire some paste from internet but it’s pretty expensive and that’s why I asked can you do lapping without paste.

[wristpin]

To back lap properly use a water based paste , not oil based as in valve grinding paste. Water based so that when done you can hose it off and get rid of every trace before rotating the cylinders in the cutting direction. Leaving a trace of paste “ undoes” some of the sharpening effect gained by the back lap. In an ideal world neglected cylinders should be relief ground to create some space to retain the paste during back lapping. Applying paste to well worn cylinders results in much of the paste being thrown off before it can get to work.
A Motor Triple with four bladed units will deal with quite heavy cutting but to get a good finish reduce the forward speed to increase the clip rate aka cuts per yard. There is an art to obtain a good finish with commercial powered cylinder equipment and even more skill required in using wheel driven gang mowers.

[hanysmiglanc]

Could you tell me how to reduce the forward speed? Is it just riding slower or will this require to adjust the belts?

[hanysmiglanc]

hi i’m ordering the paste and could someone tell me how much paste i’m going to need to sharpen all 3 cylinders?

[charlie]

The amount of paste required will depend on how blunt the blades are, so impossible to say how much you will need.

[wristpin]

Not sure where this is going but it should be accepted that back lapping is to keep the edge on cylinders that have been properly ground. Not the process to use to recover really blunt blades.

[Author]

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