Machining Ball end of 262D Rocker arms
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=26394
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Topic: Machining Ball end of 262D Rocker arms
Posted By: nowaktj
Subject: Machining Ball end of 262D Rocker arms
Date Posted: 27 Feb 2011 at 10:55am
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I'm looking over my rocker arms and have a question after I see that the surface that contacts the valve isn't very flat (due to wear).
Has anyone machined these flat? How was it done? Are places that do head work able to grab these little pcs and do the machining?
Note the pc I am talking about is not shown in this picture...it is bottom side of where the tape is showing 59".
 ------------- D19D, D17D, WD, WC, Snobee, #83 Plow, SC Blade, 14' disk, 400 series planter, B , Terra Tiger, M Dozer w/Baker Blade, TL-12, 42S Grader, G |
Replies:
Posted By: Gerald J.
Date Posted: 27 Feb 2011 at 12:27pm
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Its usually a curved surface and it slides across the valve. Sometime it hits the valve stem offcenter to make the valve rotate so it might be doubly curved or spherical which complicates regrinding. Then it was probably surface hardened so wear and grinding get to soft metal that won't wear as long as a new rocker. Gerald J. |
Posted By: CTuckerNWIL
Date Posted: 27 Feb 2011 at 12:38pm
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That looks like an insert in that end. If it goes all the way through it is probably hardened. I wonder if the insert can be removed for machining?
------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: ALinIL
Date Posted: 27 Feb 2011 at 1:03pm
| Many moons ago (50yrs) when I ground valves on an old Snap-on valve grind machine, there was an attachment that allowed you to resurface(grind) the rockerarms back to the original curved surface. Also the valve stems were also resurfaced to remove the indentation on the end. We also did a three angle grind on the valve seats. - AL |
Posted By: nowaktj
Date Posted: 27 Feb 2011 at 1:43pm
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Yes, the insert can be removed and then by taking out the snapring, this little pc can be removed (Item #11). I just struggle to see how someone would be able to chuck it up to machine it.
 ------------- D19D, D17D, WD, WC, Snobee, #83 Plow, SC Blade, 14' disk, 400 series planter, B , Terra Tiger, M Dozer w/Baker Blade, TL-12, 42S Grader, G |
Posted By: Brian Jasper co. Ia
Date Posted: 27 Feb 2011 at 4:05pm
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That's a pretty small part to machine. The good thing about that is it's a ball and can pivot as needed. I guess I'm lucky in that all of mine were flat. I only needed 1 complete arm because it got rusty in the ball and socket and didn't move freely and smoothly. New replacements are available, but are not the original ball tipped type. What Al and Gerald are referring to is known as "Re Arching". I'd bet that not every machine shop has the equipment to do that anymore. ------------- "Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford |
Posted By: injpumpEd
Date Posted: 27 Feb 2011 at 7:52pm
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My van dorn/black &decker valve grinder has an attatchment for re-facing rocker-arms. I have done many of these over the years. Simple and effective. Ed.
------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: nowaktj
Date Posted: 28 Feb 2011 at 5:43am
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Here are some detailed pictures showing the components...has someone been able to machine these small pcs?
It seems to me the item can't be machined in the rocker and would be tough to grab ahold of if it is seperated from the rocker.
   ------------- D19D, D17D, WD, WC, Snobee, #83 Plow, SC Blade, 14' disk, 400 series planter, B , Terra Tiger, M Dozer w/Baker Blade, TL-12, 42S Grader, G |
Posted By: injpumpEd
Date Posted: 28 Feb 2011 at 6:26am
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no,that style can't be surfaced on my machine. just re-install them. Ed.
------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: Brian Jasper co. Ia
Date Posted: 28 Feb 2011 at 6:35am
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I can't tell from your pic how bad they are, but if you have some that are really bad, call Sandy Lake. They had a few of the old style like yours on hand still. ------------- "Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford |
Posted By: Chris/CT
Date Posted: 28 Feb 2011 at 6:46am
| I'm thinking those ends look similar to shaft assy on shelf here off 230 Buda diesel, I will investigate if you like. I have 3 shafts w/rockers, one of them may be 262D engine, would you like to but some compete rocker assy's? |