I have seen many problem reported about the 4010 PTO stub shaft coming loose.
Here are some toughts:
The bolts could be coming loose because they fatigue. I can see 2 flaws in the design of the bolted connexion: T
1) The stretched length of the bolts is fairly small
2) The use of split washers, which is not good for fatigue
If I had a 4010, I would install the the PTO shaft with longer bolts. Either 4 drilled rounds out of hard steel (I am sure such spacer can be found easy on cars, etc…), or a ring with 4 holes, that would be my preference and is fairly easy to do with a lathe.
Spacer(s) As think as possible but still allow PTO implement install.
The spacer being made of hard steel, no washer should be used under the bolt (better for fatigue application). This can be debated, but if steel is hard, softer washers are just a source of problem. Soft washers that are softer than the steel you bolt to (white washers sold at farm stores) , are for sure BAD. Very hard quality washer is debatable. Split washers are BAD for sure in this application or in general, because they break. Maybe a heavyduty bellevile spring washers would be helpful.
Then a change over to Grade 8 bolts torqued ¼ turn before they break, and that shaft should hang in there, at least must better than it did from factory.
Here are some toughts:
The bolts could be coming loose because they fatigue. I can see 2 flaws in the design of the bolted connexion: T
1) The stretched length of the bolts is fairly small
2) The use of split washers, which is not good for fatigue
If I had a 4010, I would install the the PTO shaft with longer bolts. Either 4 drilled rounds out of hard steel (I am sure such spacer can be found easy on cars, etc…), or a ring with 4 holes, that would be my preference and is fairly easy to do with a lathe.
Spacer(s) As think as possible but still allow PTO implement install.
The spacer being made of hard steel, no washer should be used under the bolt (better for fatigue application). This can be debated, but if steel is hard, softer washers are just a source of problem. Soft washers that are softer than the steel you bolt to (white washers sold at farm stores) , are for sure BAD. Very hard quality washer is debatable. Split washers are BAD for sure in this application or in general, because they break. Maybe a heavyduty bellevile spring washers would be helpful.
Then a change over to Grade 8 bolts torqued ¼ turn before they break, and that shaft should hang in there, at least must better than it did from factory.