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  #1  
Old 06-02-2015, 09:44 AM
Krudnick Krudnick is offline
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Join Date: Jul 2014
Location: New Jersey
Posts: 8
Default #70 PTO problems

I'm having trouble disengaging the mower deck on a Model 70. The problem is it seems I need another 1/2" movement on the lever to disengage than it allows. I've had the tractor for approximately 10 years and never had a problem until last year. Now I start the tractor with the deck engaged and just mow the lawn. In the spring of this year I decided to try and repair it. I have replaced the wear button with an oil bronze button made by a local shop, replaced the center thrust button that was badly scoured, replaced all three throw out levers since the were bent slightly (with new screws and double nuts included), obtained and used the PTO clutch adjusting tool and properly set right on as well as try just under and just over the proper tension, the toothed clutch gear is 3/16" and very minor scratched, I've lapped the steel clutch plates to remove any imperfections, and the two flat springs are in good condition. A previous owner must have rebuild the PTO because the whole assembly is the newer type that uses two springs and looks like the newer model I've seen pictures of. The bearing is mounted a scant full on the shaft but that should not affect the performance because I can compensate for that with the turnbuckle linkage. And I've straightened the slightly bent housing where the bolt for the lever to engage the PTO is located, and one of the linkage rods that was slightly bent. I have the wear button separated from the center thrust button by the thickness of a playing card. When the tractor is on and I pull the lever to disengage the blades are still spinning and engaged. If I push the lever slightly over and pull back an additional 3/8" to 1/2" I get complete disengagement. Anyone have any ideas what I may be doing wrong? As long as we are on it, how do I keep the wear button and center thrust buttons lined up. There is a lot of side to side play that pushes over up to 3/16" off center and caused the brass wear button to wear unevenly, ( I had several buttons made up fortunately).

Thanks for your help.
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Old 06-02-2015, 10:41 AM
TIMCRUTCHER TIMCRUTCHER is offline
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Join Date: May 2013
Location: Kentucky
Posts: 312
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Are your basket pulley and pto mounted the correct distance from the end of the crankshaft?
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I don't use my Cub. I just work on it and look at it. So far it's holding up very well.
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Old 06-02-2015, 11:45 AM
Krudnick Krudnick is offline
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Join Date: Jul 2014
Location: New Jersey
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I have not moved the basket or PTO pulley from where they were when the PTO did disengage. They appear to be in the correct positions. The PTO pulley is a scant proud of the end of the shaft but shouldn't that be compensated by adjusting the turnbuckle?
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Old 06-03-2015, 07:34 AM
mickb72 mickb72 is offline
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Join Date: Dec 2009
Location: Ohio
Posts: 790
Default cub

Hello, for that side play. Center that button and tighten a hose clamp on one side of the rockshaft at the bottom. Mike
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

MTD Products, Inc. of Cleveland, Ohio purchased the Cub Cadet brand from International Harvester in 1981. Cub Cadet was held as a wholly owned subsidiary for many years following this acquisition, which allowed them to operate independently. Recently, MTD has taken a more aggressive role and integrated Cub Cadet into its other lines of power equipment.

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