Hi the two outer spline covers came off easy on my 60”” deck but the centre one won’t budge do I have to remove the gear box to clean the spline cover whilst replacing the blades? Cheers.
MMM blade change
- Thread starter TJBM
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whitetiger
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Kubota tech..BX2370, RCK60, B7100HST, RTV900 w plow, Ford 1100 FWA
85Hokie
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BX-25D ,PTB. Under Armor, '90&'92-B7100HST's, '06 BX1850 FEL
What MMM are you referring too?
Anything on this picture what you are describing?
If you are talking about the spline "boss" - a good "tap" with a "hammer" on the blades should vibrate it loose.
Anything on this picture what you are describing?
If you are talking about the spline "boss" - a good "tap" with a "hammer" on the blades should vibrate it loose.
armylifer
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BX1860, FEL, RCK54P MMM, BB1548 Box Scraper, Quick Hitch, Piranha Bar, BX6315
It sounds like he is trying to describe part number 60 on this drawing. Although this is not a picture of the RCK60 MMM it has basically the same parts. If it is part number 60 that you are talking about then grabbing it with a firm grip and shaking it should loosen it.
So the question is, has the blade been removed, or is it still in place?
If in place, then likely it is the spline boss that 85hokie pointed to. If the blade is off...could be item 60 in armylifer's illustration I suppose...
Hopefully the OP will clarify.
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85Hokie
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BX-25D ,PTB. Under Armor, '90&'92-B7100HST's, '06 BX1850 FEL
It always amazing me that someone takes the TIME to come here ..... ask a question ...... and never respond back!
Even if they fixed the problem without our help!
Those dust covers should come off rather easily once the blade, bolt, special washer and u-shaped double washers are removed.
Looks like the OP is from Australia. Might be out on a walkabout...
I assume you are referring to the sheet metal "cup" that goes over the spline. If so, yeah they can be a booger to get off. They get dented dinged and otherwise damaged and the easiest way to get them off once that happens? Cut them off. Start a cut at the top side of the cup, then just use a pair of pliers and peel it off. Physically kinda tough but you can do it. Obviously replace the cup. IT needs to be there, acts as a spacer between the blade and the flat on the spindle (or spline boss whichever design you have). Without it the blade will not tighten up properly, will spin on the shaft, and usually destroys the shaft, spline boss/washer, blade, blade bolt, spring corns (that's what kubota calls them...they are cupped washers), snap ring, etc. Basically everything that the blade comes near gets chewed up. Seen it a bunch of times.
I just did a comparison between the dust shields on my new 60" BX MMM and the older Zero Turn Kubota - latter are twice the thickness, considerably larger, seem far more durable. On the other hand, blades on the 60" Kubota MMM are fairly stout -- I've sharpened them 10s of times using a sharpener from All American Sharpeners and they're still going strong (my earlier tries at using a standard bench grinder seemed to take off too much metal unnecessarily getting the angle correct).
Some on youtube balance their blades after sharpening. Is that step necessary for a "good enough" guy such as myself ?
armylifer
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BX1860, FEL, RCK54P MMM, BB1548 Box Scraper, Quick Hitch, Piranha Bar, BX6315
It is not really necessary unless you begin to get a noticeable vibration from the blades. Remember, if you take off the same amount of metal on each side of the blade that you are most likely not going to have balance issues anyway.