WD will only run on full choke
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=122402
Printed Date: 18 May 2025 at 9:01am
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Topic: WD will only run on full choke
Posted By: cmmunch
Subject: WD will only run on full choke
Date Posted: 24 Apr 2016 at 11:48pm
| I have a 1948 WD, that will not run properly. Last year after putting the tractor on a trailer and taking it to a show, the tractor would not run. We checked everything that we could think of and finally we put a new carb on it. The tractor will now start and run nice at an idle, but when we throttle the tractor up it will not run unless the choke is on. Adjusting the carb changes nothing... the tractor has been timed, and the mag has new points. The tractor has fresh gas that is run through a filter. No obvious leaks to the manifold gaskets. Any help or suggestions would be greatly appreciated as we have field work that we would like to get started with... |
Replies:
Posted By: JC-WI
Date Posted: 24 Apr 2016 at 11:58pm
|
take the drain plug out of the bowl of the carb and run it into a pail... run a gallon out and see if it runs as fast at the beginning as it does before you put the plug in... and I mean a QUANTITY of gas... it should flow pretty good if it slows down to a trickle, you have dirt in the tank, or something in the neck of the sediment bowel assembly ot in the line... check to see if you might have an old felt sediment bowel filter... we had one that starve the tractor... check for kinks in the line, check the inlet of the carb too and the needle valve assembly. It sounds like fuel issue to me. Your filter could be plugging up too... I have a fairly large inline on a 190 gas and when it starts to plug, it will spit and sputter and then I take it off and blow it backwards and put it back on and go... lets us know what you find. ------------- He who says there is no evil has already deceived himself The truth is the truth, sugar coated or not. Trawler II says, "Remember that." |
Posted By: cmmunch
Date Posted: 25 Apr 2016 at 12:06am
| We have taken the sediment bowl off and just have the inline filter, we are running 5/16 new rubber lines, no kinks or bends. Will pull the plug on the bowl tomorrow and see what happens, thanks! |
Posted By: desertjoe
Date Posted: 25 Apr 2016 at 4:25am
|
Hey CMmunch,having to run with the choke on,is usually an indication of a blockage in the fuel getting to the carb. HTH's |
Posted By: Bob D. (La)
Date Posted: 25 Apr 2016 at 4:31am
|
You said you put a new carb on. Is there a possibility that the choke set-up is backwards on the new carb and what you think is choke on is actually choke off. ------------- When you find yourself in a hole,PUT DOWN THE SHOVEL!!! |
Posted By: Dan73
Date Posted: 25 Apr 2016 at 6:22am
| The other thing that can cause it to run too lean and better with the choke closed is a air leak. With it running try misting around the carb gasket and the manifold with starter fluid. If there is a leak it should suck in the starter fluid and you will hear it. Found a bad intake gasket on an onan that way before. |
Posted By: alan-nj
Date Posted: 25 Apr 2016 at 6:37am
|
Many of those inline filters are designed for systems with a fuel pump, not a gravity flow system. ------------- If ignorance is bliss, than happy days are here again. |
Posted By: Allis dave
Date Posted: 25 Apr 2016 at 6:40am
| I would try all of the above, if no solution then try removing the inline filter and see if it runs. |
Posted By: cmmunch
Date Posted: 25 Apr 2016 at 6:44am
| Have sprayed around all possible areas of air leakage and no difference was found :( |
Posted By: cmmunch
Date Posted: 25 Apr 2016 at 6:45am
| The inline filter that is on the carb is one that came with the new/rebuilt carb from the carb shop... |
Posted By: Dan73
Date Posted: 25 Apr 2016 at 7:16am
| I would call the carb shop and tell them it doesn't seem to work. |
Posted By: DSeries4
Date Posted: 25 Apr 2016 at 9:00am
As mentioned above, Inline filters are not good for gravity fed fuel systems. I would lose it and put the fuel bowl back on. It was designed to operate that way. If the gas tank has not been cleaned out, I highly recommend it. I had to left mine lined due the the rust particles moving around and plugging the outlet. ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
cmmunch wrote:Posted By: Dan73
Date Posted: 25 Apr 2016 at 9:06am
| Yup I have one I had to line and one I have been Blessed to limp by with. One good thing about the fuel bowl and screen above the bowl is you can see the gunk in the bowl and know how bad things are. Plus you want that fuel shut off for when the neddle float starts to leak and you don't have the time to fix it. I have seen a tractor which burned because of fuel leaking when it was sitting shut off. Wasn't a pretty site but now I shut off the fuel when it is off. |
Posted By: Gerald J.
Date Posted: 25 Apr 2016 at 9:16am
|
There are a few inline filters made for gravity systems, but they are rarely stocked and I doubt have the flow rate needed for a 45 hp engine being made for single cylinder engines. Most inline filters filter very fine but have a couple PSI pressure drop and the gravity system doesn't have more than about 1/2 psi when water takes a 30 foot column to match one atmosphere 15 psi. Likely crud has plugged the inlet screen in the new carburetor, or the outlet screen above the sediment bowl and screen. The first test should be that pulling the drain plug on the carburetor. The gasoline flow should be nearly the diameter of a pencil and flow continuously after dumping the contents of the bowl, about a cup of gasoline. Gerald J. |
Posted By: Skyhighballoon(MO)
Date Posted: 25 Apr 2016 at 10:47am
THIS!!!!! I took the carb off my WD45 to clean/rebuild it and I managed to put the choke arm on 180 degrees off when I installed it....drove me nuts till I figured out it was backwards. Mike ------------- 1981 Gleaner F2 Corn Plus w 13' flex 1968 Gleaner EIII w 10' & 330 1969 180 gas 1965 D17 S-IV gas 1963 D17 S-III gas 1956 WD45 gas NF PS 1956 All-Crop 66 Big Bin 303 wire baler, 716H, 712H mowers |
Posted By: Dan73
Date Posted: 25 Apr 2016 at 11:05am
| The choke is an easy check just take the pipe to the air cleaner off and look to see how the choke works. |
Posted By: Sugarmaker
Date Posted: 25 Apr 2016 at 11:56am
|
Darn WD's are starved for attention! Mine want something all the time and have ways to remind you that they are in control! Reqards, Chris ------------- D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet. |
Posted By: jiminnd
Date Posted: 25 Apr 2016 at 5:29pm
|
I have an inline filter on my WD, have not had a problem with that in 14 years, must be the right filter. ------------- 1945 C, 1949 WF and WD, 1981 185, 1982 8030, unknown D14(nonrunner) |
Posted By: dawntreader74
Date Posted: 25 Apr 2016 at 6:19pm
| has't to be blocked up at the tank outlet or the fuel line is going up hill to much' don't help very much at all. |
Posted By: Thad in AR.
Date Posted: 25 Apr 2016 at 6:37pm
| I had an acorn in my gas tank once. It would start and idle just fine but had no power with any throttle. The drain plug check will tell you if it's a blockage. It would run a constant flow just not enough. I have 2 wd45's that take on rain in the gas tanks if left outside. I've never been able to find out how. |
Posted By: Dan73
Date Posted: 25 Apr 2016 at 6:44pm
Check around the fill neck on your WD45 'S that take on water in the rain. My d17 had the same issue turned out all the leading or I think it os probably old lead anyway it is really soft that holds the fill neck to the tank had cracked over the years. I found it cause my fill neck was so abused you couldn't get a cap off when I removed it to fix a new setup the whole into the tank was all rust about 3/4 of the way around so only a very small area was still holding that fill neck into my tank. That was where my water came from after replacing that I haven't had any trouble. I cut the top off a different tank and made a gasket to hold it down then bolted it to the top of my tank came out nice and I now have a gas cap that fits right. |
Posted By: Brampton 02 gt
Date Posted: 25 Apr 2016 at 9:04pm
| Sounds like dirt in the carb. Drain the carb and unscrew the main jet. Let some gas drain out. screw back in the jet and plug and you will be set until it gets dirty again. As suggested above you may need to clean out tank. I have used a cheap inline filter with good success. |
Posted By: EPALLIS
Date Posted: 25 Apr 2016 at 9:33pm
|
"I had an acorn in my gas tank once." Best laugh I had all day. How on god's green earth did an acorn find it's way in there?! Seriously, Yes, my WD also had this problem once. I completely removed the entire filter assembly at the tank and disposed of it. Let the 2 gallon of fuel in the tank completely drain through the hole. Then purchased a brand new fuel filter assembly, threaded in with fuel pipe dope and not a problem since in 6 years. Hope this helps. |
Posted By: Freewheelin
Date Posted: 26 Apr 2016 at 6:06am
| Pull your fuel line off and blow back into the tank. If it runs OK after that you may have something blocking the outlet. Had the seal from an additive cap in my WD tank. Fit perfectly into the outlet hole. Drove me nuts. |