carburetor 440ic
carburetor 440ic
I have a Marvel - Schebler TSX carb on my 440ic. It seems that when I let the tractor set for long periods the needle valve quit working and gas floods out of the carb when I open the valve on the sediment bowl.
This time I replaced the float needle valve and seat on the gas still pours out of the carburetor. I have cleaned all the parts checked the float adjustment and reassembled it carefully several times. when the carburetor is dry I can turn it upside down and can't blow through the gas supply fitting. I can here the float moving when I turn it over, so I think that is free. The float has no fluid inside it when I take it apart and no visible holes.
that could drain as fast as I take it apart. This is such a simple system I can't figure out what else could go wrong. Any help would be appreciated.
Curt Genther
In Bow, Wa
This time I replaced the float needle valve and seat on the gas still pours out of the carburetor. I have cleaned all the parts checked the float adjustment and reassembled it carefully several times. when the carburetor is dry I can turn it upside down and can't blow through the gas supply fitting. I can here the float moving when I turn it over, so I think that is free. The float has no fluid inside it when I take it apart and no visible holes.
that could drain as fast as I take it apart. This is such a simple system I can't figure out what else could go wrong. Any help would be appreciated.
Curt Genther
In Bow, Wa
- DukeofDeere
- 1010 crawler
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That is something I have noticed before on my M-S carbs; it would be worth checking as it sounds like everything else logical has been checked.DukeofDeere wrote:Check too if the float can drag on the inside of the carb..
Duke
(1) JD Straight 450 crawler dozer with manual outside blade; (2) JD 2010 diesel crawler loaders; (1) JD 2010 diesel dozer with hydraulic 6-way blade; (2) Model 50 backhoe attachments, misc. other construction equipment
- Paul Buhler
- 350 crawler
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- Joined: Wed May 21, 2008 6:25 pm
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Check that you have the correct float for your model. As stated, it may be hanging up preventing the needle from seating fully. Good luck.
Check this manual. Hope it helps. Paul
http://l-36.com/carb.pdf
Check this manual. Hope it helps. Paul
http://l-36.com/carb.pdf
Paul Buhler
Killington, VT
420c 5 roll with 62 blade, FOPS, and Gearmatic 8a winch
Killington, VT
420c 5 roll with 62 blade, FOPS, and Gearmatic 8a winch
- DukeofDeere
- 1010 crawler
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- Joined: Wed Oct 26, 2011 7:12 am
- Location: Hudsonville Michigan
- DukeofDeere
- 1010 crawler
- Posts: 443
- Joined: Wed Oct 26, 2011 7:12 am
- Location: Hudsonville Michigan
Thanks Duke,
I am running, however, I am over heating after about 50 minutes of operation (the bulldozer is too:).
I installed a new thermostat and new cap on the radiator, but sill getting hot.
I guess that leaves the water pump or the radiator.
I don't even know where to get radiator work done around here any more .
All the shop I used to know about are out of business. Too many regulations I think.
Curt
I am running, however, I am over heating after about 50 minutes of operation (the bulldozer is too:).
I installed a new thermostat and new cap on the radiator, but sill getting hot.
I guess that leaves the water pump or the radiator.
I don't even know where to get radiator work done around here any more .
All the shop I used to know about are out of business. Too many regulations I think.
Curt
- DukeofDeere
- 1010 crawler
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- Joined: Wed Oct 26, 2011 7:12 am
- Location: Hudsonville Michigan
Make sure to get an estimate first if you have to have it recored. New radiator might be less than a recore job.
Stupid question, but you didn't get the thermostat in backwards?
Lavoy
Stupid question, but you didn't get the thermostat in backwards?
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com
Owner and moderator www.jdcrawlers.com
Need a new float too, apparently even brass starts to age after half a century. Nearly set my machine on fire when it first started leaking! Have to shut the fuel off and let it run dry when I park it.
For the overheating issue, first I'd make sure it was full of coolant (yes really, with the engine off the top of the radiator core should be underwater). Then check tightness of water pump belt.
After that, start the engine with the cap off and watch in there. Upon the thermostat opening, you should see a good amount of flow happening (be ready to put the cap on quick if it tries to come out). With the low horsepower of these engines, you may have to work it to get it to t-stat temp then VERY CAREFULLY remove the cap with engine off and a rag over the cap, turn to first click to release pressure first. Then start again and look. If flow is poor, your water pump impeller may have deteriorated or the radiator may be plugged.
For the overheating issue, first I'd make sure it was full of coolant (yes really, with the engine off the top of the radiator core should be underwater). Then check tightness of water pump belt.
After that, start the engine with the cap off and watch in there. Upon the thermostat opening, you should see a good amount of flow happening (be ready to put the cap on quick if it tries to come out). With the low horsepower of these engines, you may have to work it to get it to t-stat temp then VERY CAREFULLY remove the cap with engine off and a rag over the cap, turn to first click to release pressure first. Then start again and look. If flow is poor, your water pump impeller may have deteriorated or the radiator may be plugged.
- DukeofDeere
- 1010 crawler
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- Joined: Wed Oct 26, 2011 7:12 am
- Location: Hudsonville Michigan
when you have the stat out you might want to do a simple test on the rad. take the lower hose off hold your hand over the outlet...fill the rad when full take your hand off and it should empty almost instantly if not its is getting plugged .. you can also put a garden hose in the top and see if it will take all the flow (has to be good flowing hose not a trickle)
2010 with 622 dozer with mod. 35 ripper and a 2010 with 622 dozer bought in 1969 and a 2010 loader with drott and mod. 36 ripper
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