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Oil Field Engines & Related Equipment

Back on the Ajax again


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  #61  
Old 02-19-2007, 05:22:45 PM
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Eric M. Eric M. is offline
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Default Re: Back on the Ajax again

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Originally Posted by KeithW View Post
What a differance a year and a few hundred hours of labor make! I just returned from an unexpected trip back to Missouri for my Grandmothers funeral . There are a number of small trailer manufacturers around there so I stopped in and ordered a custom trailer for the Ajax. I'll pick it up in May on the road trip for taking the crank to Oklahoma. With some luck I'll have it all together for the Vista California show in July. If not then October for sure. So far this has been more work and more expensive than I expected. However, I would do it again without a second thought. It's worth every bit of it.

keithw

I am sorry to hear of your Grandmother's passing. This will be a NEAT engine to see at the Vista show. I've been following this thread, just lurking, and I'm amazed how much dedication you show to this project. Keep up the good work!
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  #62  
Old 02-25-2007, 10:57:05 PM
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KeithW KeithW is offline
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Photo Re: Back on the Ajax again

More fiddly bits. When I took the magneto drive apart I noticed the shaft was loose in the bushing. Figured the bronze bushing was worn. Wrong answer, a piece of new 5/8" drill rod fit perfectly. The fire and weather did a number on the shaft. Way pitted and undersized. Also, one of the woodruff key slots was wallowed out. Another chance to play machinist . Now to order a new taper pin reamer to make the pin hole. And yes, matching an existing hole is a PITA. Once I get this bit done I should be able to install the magneto, turn the side shaft, and make sparks .
http://members.aol.com/keith0alan/images/ajax91.jpg

keithw
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  #63  
Old 03-02-2007, 08:19:31 PM
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KeithW KeithW is offline
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Photo Re: Back on the Ajax again

Trecked across town to pick up the taper pin and put the magneto drive back together.

http://members.aol.com/keith0alan/images/ajax92.jpg

http://members.aol.com/keith0alan/images/ajax93.jpg

Dragged out the magneto and made sparks .

http://members.aol.com/keith0alan/images/ajax94.jpg

Mounted it to the engine, turned the side shaft and made more sparks ! This is the correct cap with the internal shorting bars on the unused terminals.

http://members.aol.com/keith0alan/images/ajax95.jpg

That magneto looked pretty darn good when I first got it working, way better than when it was dead. I guess a little more cleaning and a bit of paint are in order.

keithw
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  #64  
Old 03-07-2007, 06:59:34 PM
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KeithW KeithW is offline
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Photo Re: Back on the Ajax again

On to the cooling system. Just in case you didn't know what the inside of a gear rotor pump looks like.

http://members.aol.com/keith0alan/images/ajax96.jpg

Well, sorry, you still don't know. The inside is pretty much rusted away. Not sure how much I can save and how much will have to be fabricated.

The radiator has no bullet holes . The core and fins are steel and pretty much gone. This is one of those times I'm just going to take it to a radiator shop, close my eyes, and slide the credit card across the counter.

http://members.aol.com/keith0alan/images/ajax97.jpg

The good news is that the fan bearing is in great shape. I'm going to replace it anyway, oh well .

http://members.aol.com/keith0alan/images/ajax98.jpg

http://members.aol.com/keith0alan/images/ajax99.jpg

http://members.aol.com/keith0alan/images/ajax100.jpg

keithw
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  #65  
Old 03-10-2007, 11:49:01 AM
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Doug Waggonner Doug Waggonner is offline
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Lightbulb Re: Back on the Ajax again

Hi Keith
On your radiator it might be cheaper to get a new one from www.oilfieldradiators.com
I don't know the prices but it couldn't hurt to ask
hope this helps.
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  #66  
Old 03-13-2007, 10:28:03 AM
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Default Re: Back on the Ajax again

Thanks Doug ,

We're still planning to be through there in late May and back a week or so later. Hope to get get together with you for a visit.

keithw
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  #67  
Old 04-10-2007, 06:00:29 PM
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Photo Re: Back on the Ajax again

More fiddly bits. The pivot that moves the lever on the oil pump that is attached to the end of the rod going to the eccentric on the side shaft. Both the pin and the hole it goes through were way rusted.

http://members.aol.com/keith0alan/images/ajax101.jpg

http://members.aol.com/keith0alan/images/ajax102.jpg

Turned the pin on the lathe to make a smooth surface. I didn't get to the bottom of all the pits but it's good enough. Chucked up the oddly shaped piece in the 4 jaw chuck and centered the hole. This way the minimum material was removed to make the hole round. The hole was off center and out of round. Cleaned up the hole and turned a piece of oilite bronze that would press in after I heated the pivot bit. Faced off the bronze then centered the piece on the outside. That way the hole I drilled would be centered in the piece rather than in the old hole. Re drilled the oil hole and it's off to cleaning and painting.

http://members.aol.com/keith0alan/images/ajax103.jpg

http://members.aol.com/keith0alan/images/ajax104.jpg

keithw
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  #68  
Old 07-03-2009, 03:58:56 PM
Jerry Sweet Jerry Sweet is offline
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Default Re: Back on the Ajax again

Back on sept 23 - 06 (third entry),you were talking about pulling a Ajax flywheel.This is a little late,but it may help next time.The Ajax engine has a tapered flywheel key with a serial no.on it.The number matches a number on the end of the crankshaft and on the flywheel.To remove the wheel you remove the clamp bolt and drive a wedge in the slot(on the bigger engines you may need 2 wedges).the key should have a hole in the end tapped for a 1/2"x13 thd.bolt for a puller bolt.Pull the key.If the wedges are set right,the flywheel should come right off.To replace the wheel, slide it onto the shaft,put the key in about half way(note:the serial no.on the key has to be facing toward the outer rim of the wheel.Knock out the wedges,install the clamp bolt and tighten all the way.Now drive the key the rest of the way in.
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  #69  
Old 07-05-2009, 08:10:54 PM
Chuck Ostrander Chuck Ostrander is offline
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Default Re: Back on the Ajax again

Keith, If you are going to make the Vista Ca. show in October please post, I will try to bring my little WL so you will have some Ajax company. Have needed an excuse to get the Ajax out of Az. for a day or two. I used a piece of plastic PVC, reamed it out, and was then able to attach the air cleaner to the carb. Runs much better now.
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  #70  
Old 12-06-2010, 02:07:34 PM
euclid007 euclid007 is offline
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Default Re: Back on the Ajax again

I have a 11 inch bore by 14 inch stroke ajax engine, what is the horse power? Thanks
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  #71  
Old 12-06-2010, 04:40:22 PM
Jerry Sweet Jerry Sweet is offline
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Default Re: Back on the Ajax again

A DP 80 is 11" x 14" and is rated at 80 H.P.@ 400 R.P.M.
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