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Oil Field Engines & Related Equipment

Ajax 7 1/2 x 10, the home stretch, I hope.


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  #31  
Old 07-18-2007, 06:13:10 PM
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KeithW KeithW is offline
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Photo Re: Ajax 7 1/2 x 10, the home stretch, I hope.

The lube pump is driven by an eccentric on the lay shaft. Where the rod comes out of the accessory box there are two interlocking aluminum bits. One of them was busted up . Last time I was down at my favorite surplus store down in L.A. I picked up some aluminum bar square stock .

http://members.aol.com/keith0alan/images/ajax144.jpg

A little time on the mill and here it is. A shiny new bit ready to bolt on .

http://members.aol.com/keith0alan/images/ajax145.jpg

I'm about ready to hang the cylinder and have cleaned some on the flywheel.

keithw
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  #32  
Old 07-18-2007, 09:59:55 PM
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Photo Re: Ajax 7 1/2 x 10, the home stretch, I hope.

Happy day , the cylinder is back on.

http://members.aol.com/keith0alan/images/ajax146.jpg

http://members.aol.com/keith0alan/images/ajax147.jpg

Toward the end of the day it cooled off enough that I finished cleaning and got it hung. I can only work outside an hour or two in the morning and another hour or so in the evening. It's just too hot in the middle of the day so I do inside stuff then.

keithw
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  #33  
Old 07-20-2007, 10:39:34 AM
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Photo Re: Ajax 7 1/2 x 10, the home stretch, I hope.

Got the piston cleaned up and ready to install.

http://members.aol.com/keith0alan/images/ajax148.jpg

Used a big hose clamp as a low tech ring compressor. Worked just fine

http://members.aol.com/keith0alan/images/ajax149.jpg

Now it's home. Snugged up the set screw on the side of the cross head then got out the home made ostrich foot (really big crows foot) and tightened up the luck nut on the piston shaft.

Found a thermostat at the auto parts store that will fit with only trivial modification to the opening in the head. These were not originally fit with a thermostat but idling along it would never warm up properly without one.

Don't know about anyone else but I'm getting way excited at this point . Still a lot to do but it will be at the Vista show in October. Unless I hit a real road block it should even be running .

keithw
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  #34  
Old 07-20-2007, 11:57:45 AM
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Elden DuRand Elden DuRand is offline
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Default Re: Ajax 7 1/2 x 10, the home stretch, I hope.

Quote:
Originally Posted by KeithW View Post
......................snip..................
Don't know about anyone else but I'm getting way excited at this point . Still a lot to do but it will be at the Vista show in October. Unless I hit a real road block it should even be running .

keithw
Keith:

You and me both! I wish I could be there to see it bark-off the first time.

Take care - Elden
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  #35  
Old 07-20-2007, 03:26:41 PM
Eric M. Eric M. is offline
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Default Re: Ajax 7 1/2 x 10, the home stretch, I hope.

Well Keith, I'm sorry to say I won't be able to see this one at the Vista show in October. I'll be on a family vacation.

As goes the engine "just idling along", the museum does have a Baker Fan. The head of the Steam Traction Engine division also is in charge of the Baker Fan. He's on the stack, using the handle "Steamrguy". Send him a PM or email. He likes to see all kinds of stuff making a breeze. I think that could warm up your Ajax a little bit
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  #36  
Old 07-22-2007, 07:43:42 PM
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Photo Re: Ajax 7 1/2 x 10, the home stretch, I hope.

Sorry you won't make it to Vista. I expect to bring it again in the future. The Baker fan would be fun but I'll have to find a belt pulley to fit the Ajax first.


More fiddly bits. The primer cup took a hit and was flattened a bit.

http://members.aol.com/keith0alan/images/ajax151.jpg

A little hammer work and a drop of silver solder to fill the crack and it's ready to go.

http://members.aol.com/keith0alan/images/ajax150.jpg

Primer cup in place and the head and cover in place.

keithw

http://members.aol.com/keith0alan/images/ajax152.jpg

Rigged up a ball valve and air coupling for the air start port. I don't expect the valve would handle the engine running but it will be handy to turn it over. I've also got a couple of 12VDC operated air valves on the way. Plan to rig it up so that I can run the engine on air. I'll put switches on the lay shaft to turn the compressed air on during the power stroke and vent the cylinder pressure on the compression stroke. Be good for breaking in the rings and checking to make sure the oiling, ignition, governor, and such things work before I actually fire it up. I've got a 5HP compressor and it will be interesting to see how much air it takes to turn the thing over.

http://members.aol.com/keith0alan/images/ajax153.jpg

keithw
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  #37  
Old 07-23-2007, 07:53:41 PM
Bill Geyer Bill Geyer is offline
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Default Re: Ajax 7 1/2 x 10, the home stretch, I hope.

Keith it really takes some venting to keep one rolling. You might have to vent (exhaust) where your ball valve is, and supply the air at the spark plug. Should be really fun if you can keep her rolling like that Good luck!
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  #38  
Old 07-23-2007, 08:20:48 PM
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Photo Re: Ajax 7 1/2 x 10, the home stretch, I hope.

Running on air should be interesting to try. I plan to control the inlet and exhaust valves with separate switches and cams so I get the maximum flexibility.

Got the outside of the flywheel cleaned and primed.

http://members.aol.com/keith0alan/images/ajax154.jpg

Now to turn it over and do the other side.

http://members.aol.com/keith0alan/images/ajax155.jpg

The flywheel is the one part that truly frightens me, it is so heavy and awkward. I will be very happy when it's back on the end of the crank where it belongs . I'll primer both sides but I'm only going to paint the inside of the hub where it can't be reached after it is installed. The paint on the rim would get all scraped up from the chains anyway .

keithw
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Old 07-27-2007, 11:29:22 PM
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Photo Re: Ajax 7 1/2 x 10, the home stretch, I hope.

Today was hang the flywheel day. Got up bright and early and started heating the flywheel rim. The stupid space heater wouldn't light . It made sparks and the gas turned on, it just wouldn't light off. Tore into it and couldn't find any problems. Ended up lighting it with the propane torch. Another project for another day.

http://members.aol.com/keith0alan/images/ajax156.jpg

While the flywheel started cooking I ran off and picked up about 40 lbs of dry ice. Put together a cardboard box lined with foam with a hole cut to put over the crank. Loaded it up with dry ice.

http://members.aol.com/keith0alan/images/ajax157.jpg

About 6 hours later of moving the heater around and keeping the box full it was time for the real work. While I was waiting I made a new flywheel key. Hoisted the flywheel up, drove a couple of thin wedges in the pinch bolt slot. Then ran a chain from one spoke to my railroad jack on the other end of the crankshaft and around to the opposite spoke. Sort of busy, didn't get a picture of that. Once I got things straight it cranked right on.

http://members.aol.com/keith0alan/images/ajax158.jpg

http://members.aol.com/keith0alan/images/ajax159.jpg

The hole in the flywheel is .002" smaller than the end of the crank. Sorting through the math it looked like I would need about 250 F colder on the crank than the flywheel. The wedges were able to open the flywheel by about .001 reducing the difference required. Even with the heating, cooling and wedges it still took some serious cranking on the jack to get it on.

I am very glad this part is done. Turning the flywheel the engine turns over smooth as silk .

keithw
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Old 07-28-2007, 11:52:06 PM
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Photo Re: Ajax 7 1/2 x 10, the home stretch, I hope.

Mostly rested up today but did get a couple of things done. Wired up the switches and valves to try the run on air thing. Made a bracket to hold the two switches by the lay shaft. I taped some thick neoprine gasket material to the shaft to operate the switches.

http://members.aol.com/keith0alan/images/ajax160.jpg

Screwed the valves into the air start port. The inlet valve opens from TDC till the exhaust port opens. The exhaust valve opens from when the exhaust port closes till TDC.

http://members.aol.com/keith0alan/images/ajax161.jpg

It actually works . I run between 100 and 125 PSI in my air lines and it took it all to get it started. Once it was going it took less. Only turned it over for a little bit. There is no oil in the engine and you can only ask so much from the assembly lube and what you can squirt in with the oil can.


I'm not using the original clutch so I don't really need the big arm mounted to the side cover. Figured it would be cool to look in and see the crosshead and watch the oil splash around. I cut a window from some clear plastic. Not sure how long it will last being splashed with oil but it should be good for a while.

http://members.aol.com/keith0alan/images/ajax162.jpg

keithw
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