Hello fellow tractor fellers: I was trying to get through this without having to beg for help but this carb has me puzzled. I’d be happy to hear whatever advice anyone wishes to offer. I searched this forum using about every key word I could think of to no avail.
I’ll describe my three questions then introduce myself below since this is my first post.
Marvel Schebler TSX 769 – Type “C” (on a 1959 Ford 801).
Please refer to attached pdf with pictures and notations, it will make all this much clearer.
First Question:
On the float, when I took the carb apart, there is a small metal bracket that lines up with the float and the hinges attached to the upper half of the carb. The float pin goes through it. There was also a replacement in the new parts kit. I can’t figure out what it does, and for that matter if it is needed at all. I looked at a handful of videos, some from very qualified mechanics, and did not see one of them use this thing. Any opinions? Needed or not?
Second Question:
There is a small hole in the very bottom of the fuel bowl. It is threaded on the inside like it’s intended to take a jet. It is connected to the hole that the power jet goes in (see pipe cleaner photo). When I took the carb apart I don’t remember anything being in there and when I looked at all the parts I removed (I keep everything, even broke stuff), I couldn’t find anything that would fit in the hole. (I think it will take the idle jet, but I know where that goes.) I was trained in the oilfield, if there is a bolt hole there darn sure better be a bolt in it. Should I relax about it?
Third Question:
This one is driving me crazy. Using new parts from the kit, I screwed in the emulsion tube from the bottom of the carb (big hole on bottom) then I screwed in the large nut that has the smaller nut which the power jet screws into. So far, so good. I ran the power jet in all the way till it lightly tagged, then backed it out 1.5 turns. The power jet screw is just dangling, absolutely zero resistance to hold it in one place. I bet if I started the tractor the vibration will shake it out in 10 minutes. I thought the smaller nut was perhaps what would be called in the oilfield a “packing gland”, which when you tighten it up it tightens a seal against whatever is inside the packing. So I tightened that nut as much as I was brave (5/16” brass = weak) but the power jet still just barely tight. Time for JB Weld? Haha.
Sorry the foregoing is lengthy and wordy, but I’d rather error on too much info than force someone to have to ask about something I could have included. I truly appreciate whatever input you guys can offer. Thank you.
My story, briefly:
I bought this tractor about 15 years ago and actively used it until I got divorced, then just about everything in my life went on hold. So it sat by the barn for the last +/- 10 years. This Spring I got the itch to put it back into shape, which has been a fun project. It was not very well maintained before, so it was a little bigger project than to just get it running – while I’m at it I’m fixing some of the neglected things too. This old iron was truly built to be worked on; such a nice change from my Nissan, for example, which is almost 100% held together with plastic clips.
I’m an engineer and lawyer by training and degree, now mostly retired. I’m a half-a**ed mechanic, welder and one-time stock car racer. I made my money buying and selling oil wells all over the US, experience which is of exactly zero use on the topic above. I currently split my time between West Texas and Palm Springs with my considerably younger new wife.
I’ll describe my three questions then introduce myself below since this is my first post.
Marvel Schebler TSX 769 – Type “C” (on a 1959 Ford 801).
Please refer to attached pdf with pictures and notations, it will make all this much clearer.
First Question:
On the float, when I took the carb apart, there is a small metal bracket that lines up with the float and the hinges attached to the upper half of the carb. The float pin goes through it. There was also a replacement in the new parts kit. I can’t figure out what it does, and for that matter if it is needed at all. I looked at a handful of videos, some from very qualified mechanics, and did not see one of them use this thing. Any opinions? Needed or not?
Second Question:
There is a small hole in the very bottom of the fuel bowl. It is threaded on the inside like it’s intended to take a jet. It is connected to the hole that the power jet goes in (see pipe cleaner photo). When I took the carb apart I don’t remember anything being in there and when I looked at all the parts I removed (I keep everything, even broke stuff), I couldn’t find anything that would fit in the hole. (I think it will take the idle jet, but I know where that goes.) I was trained in the oilfield, if there is a bolt hole there darn sure better be a bolt in it. Should I relax about it?
Third Question:
This one is driving me crazy. Using new parts from the kit, I screwed in the emulsion tube from the bottom of the carb (big hole on bottom) then I screwed in the large nut that has the smaller nut which the power jet screws into. So far, so good. I ran the power jet in all the way till it lightly tagged, then backed it out 1.5 turns. The power jet screw is just dangling, absolutely zero resistance to hold it in one place. I bet if I started the tractor the vibration will shake it out in 10 minutes. I thought the smaller nut was perhaps what would be called in the oilfield a “packing gland”, which when you tighten it up it tightens a seal against whatever is inside the packing. So I tightened that nut as much as I was brave (5/16” brass = weak) but the power jet still just barely tight. Time for JB Weld? Haha.
Sorry the foregoing is lengthy and wordy, but I’d rather error on too much info than force someone to have to ask about something I could have included. I truly appreciate whatever input you guys can offer. Thank you.
My story, briefly:
I bought this tractor about 15 years ago and actively used it until I got divorced, then just about everything in my life went on hold. So it sat by the barn for the last +/- 10 years. This Spring I got the itch to put it back into shape, which has been a fun project. It was not very well maintained before, so it was a little bigger project than to just get it running – while I’m at it I’m fixing some of the neglected things too. This old iron was truly built to be worked on; such a nice change from my Nissan, for example, which is almost 100% held together with plastic clips.
I’m an engineer and lawyer by training and degree, now mostly retired. I’m a half-a**ed mechanic, welder and one-time stock car racer. I made my money buying and selling oil wells all over the US, experience which is of exactly zero use on the topic above. I currently split my time between West Texas and Palm Springs with my considerably younger new wife.
