Messages

Is the BF Avery transmission a 3 or 4 speed? I found this link that states it is a 4 forward and 1 reverse:
http://www.tractordata.com/farm-tractors/006/4/4/6445-bf-avery-r-transmission.html

Also, would the BF Avery Clark unit fit in an OC-3 and would the 1st gear be lower that the Clark unit in an OC-3?

Thank you.

I took a trip to see the Moline BF gas tank and the person also had a BF Avery tractor. The gas tanks are identical to the OC-3 gas tanks.

I found someone with a BF Moline about 100 miles away so will check out the gas tank and post whether the BF Moline and OC-3/HG gas tanks are the same. Too cold in MN to do it for a few weeks. Thanks Doug and Blake
.

Does anyone know whose gas tank Cletrac and Oliver used on the HGs and OC-3s? I'm thinking it must have been used on several other tractors since there is an indent on the top and bottom where a steering shaft probably went for tractors and there is no reason for the indents on the HGs and OC-3s.

I think I have the carb. problem fixed. I talked to Mark at http://www.markscarb.com/contact-us.html
He asked if my 403 carb. had threads on the carb. top section under the plug and a seat in the bottom section. I did so he sent me a power needle. I knocked out the plug, screwed in the needle, and put the carb. on the OC-3. The power needle, spring, and washer type gasket was about $25 including shipping.
There is very little smoke now and the half hour or so I ran the machine, the plugs started to clean up. I was able to kill the engine by turning the new power needle in so it is seating properly.
So, the 403 can be converted to a 406 type with a power needle.

Thanks Jack, good ideas.
Happy Holidays to you!

Thanks Doug, I'll keep your offer in mind. A machinist friend is getting a power needle from a friend of his. I don't know what it from but I'm thinking an Allis or Farmall with a Marvel carb. We are thinking the plug on top of the carb. where carbs. like the 406 have the power needle, could be knocked out and the power needle could be put in the 403. There are threads under the 403 plug and there is a jet where the needle would seat. Without the power needle, the jet hole regulates the mixture but with the power needle, the hole is adjustably (word?) shut down and the mixture is regulated.
Anyway, that is what we are hoping will happen??
Does the Case VAC carb. have the throttle and choke on the same side as the 403? The Allis carbs. have them on the opposite side.
Thanks again.

Has anyone found a muffler for an OC-3 in a tractor store that fits without much modification. I have read that a 1.5" O.D. inlet goes inside the exhaust manifold outlet. My Oliver exhaust manifold also has a lip on the outside that is 1 7/8". I found an ac-1 (ALLIS) muffler that would work well  but it is just a little large on the inlet and I'd prefer to have it clamp to the O.D. of the exhaust manifold outlet (1 7/8"). The inlet length is 7" which would be just right. Before I start welding up an adapter, is there anyone that has found an easy to fit muffler.
Thanks

Thanks Jack. Now the search for a 406?

Thanks Doug. One site said the TSX406 was for distillate. Was it also used for gas?

Blake and Doug, I think you are probably right on the rings not being a problem but it may just be wishful thinking on my part. The plugs were just sooty. Does anyone know if the main jet is supposed to be a #130? That number was stamped on the little jet and does the metering of the fuel and there is no adjustment on the TSX-403. I'm wondering if the wrong jet is in the carb.? There is very little blowby. I watched the oil filler tube while the engine was running and could just see a very little smoke that seemed to be sitting there and not puffing.

Good idea Jack. I checked today and the carb. is a TSX 403 and the main jet is a #130. I'll try lowering the float. The carb. is off now.  I plan on giving it a good workout to try and loosen the compression rings also. If all else fails, I'll give it a ring job (hopefully that is all that is needed) this Spring. I'm thinking the cylinders are in pretty good shape with 115 - 120 PSI compression on all cylinders. I thought the compression rings usually wore out long before the oil rings but I don't know much about the Hercules engines.

I am slowly getting the old OC3 fixed up but need some ideas.

So far I have replaced the magneto with a rebuilt XB4000 Distributor (XH1113 mag. look alike). The timing is right on and the advance works well.

Replaced the spark plugs with AC R45S and the spark plug wires (copper core).

Overhauled the Marvel carburetor.

Today I took it out for a run after putting the overhauled carb. on and it ran well but sure does smoke on acceleration. It is running way rich. When I say it ran well, it seems to do fine (doesn't miss) going up my hill or whenever there is a load but, at any speed without a load (not in gear) there is random missing every second or two (a mechanic friend used to call this slobbering). After checking the new plugs, they were all full of soot after only a half hour or so. The smoking is on acceleration and isn't nearly as bad at a steady RPM. I think the smoking is from an overly rich condition rather than from worn or stuck rings (good compression). The smoke is mainly black with a little blue.

Nothing has helped the OC-3 that I have done.

While it was still warm, I pulled the plugs, gave it full throttle, and did a compression test. All four cylinders were between 115 and 120 PSI. I have a reduction starter on the engine so it did crank quite fast with no plugs in it.

I didn't check the carb. float for leaks but did set it to the standard 1/4" above the gasket. I soaked the carb. with the jets out for two days in carb. cleaner and blew it out with compressed air well. This carb. does not have the adjustable main metering jet. Would a leaky float cause the engine to "slobber" while running with no load? I would think a leaky float would cause a flooded condition.

There is very little blowby watching the oil filler tube. I can just barely see a little smoke sitting in the tube but there is no noticeable puffing.

I replaced the 10W-30 oil with Mobil Delvac 15W-40 just to see if the smoking would be reduced with heavier oil and it wasn't.

So, things I have thought about checking now is the carb. float for leaks but I can't think of anything else. I thought maybe I had bad rings or valves but the good compression test rules that out, right? I didn't check whether the carb. was the correct Marvel. I have read here that it should be a TSX 403 or 406. I assume mine is a 403 since I can't adjust the main metering jet. Would valve guides cause the random miss with no load and sooty plugs (all 4 plugs)? I used to have a Chevy 283 and 327 and both would smoke on acceleration because the valve guides were worn which was a common problem with those engines.

Anyway, I'd appreciate any help figuring out why the engine is running rich and smoking on acceleration.

Blake, yes it has a centrifugal advance. I believe it is exactly like the XH line of magnetos except it does not have an armature and impulse mechanism. It timed great with my timing light and I could see the advance working as I moved off idle to maximum advance with the maximum advance set for viewing on the flywheel through the hole to the rear of the carb. exactly as with the XH.

FYI
I had a WICO XH113 Magneto in pretty bad shape on my OC-3. The XH1113 is the magneto used on later HGs and OC-3s.
I can't hand crank the engine because of the hydraulic pump on the front of the crankshaft so will always need a battery and electric start. I like to keep things simple so I traded the WICO XH1113 for a WICO XB4000 distributor (fewer moving parts). THe XB4000 looks like the XH1113 except for a door which houses a resistor and a lug on the bottom of door to connect the battery. My XB4000 actually has two resistors in series since I am running with a 12V battery. The coupling to the XB4000 has a "C" stamped on it. There are actually 4 couplings that can be used with the XB4000 depending on which engine it is used on but the Hercules takes the "C" coupling.
The engine runs great with the XB4000 and the timing came in with the timing light just as it did with the XH1113.
Without the impulse mechanism and armature (rotor), the XB4000 is much simpler compared to the XH1113.