Woe is me XT
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=46897
Printed Date: 16 Nov 2024 at 4:14pm
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Topic: Woe is me XT
Posted By: captaindana
Subject: Woe is me XT
Date Posted: 08 Mar 2012 at 5:28pm
| OK guys here's what's happened. Last week when I first got the XT running after a 27 year sleep it ran really good. Today I had trouble getting it running. I have to use snorts of eather, but as last week the diesel just doesnt seem to get into the cyls. I bled every line while cranking and it took a while. The question I have is this; both of my gascolators on the fuel tank outlets leak some. Could this be associated with a lack of fuel or a seemingly lost prime? I suppose if they leak then air may be getting to the filter and pump? I hope to hear some opinions please. Tomorrow morn I plan on shutting off both spigots and r&r glass bowls and clean them. I did this last fall after draining the old fuel of course, and tonite I can see a quarter inch settlement in each. I could never get the spigots to completely shut off when I had removed my pump for the rebuild; the line to the disconnected pump kept dripping. However I can see both bowls are wet with fuel leakage. These have to be absolutely not leaking, correct? Could this be the problem? I did run it for an hour today but it had a miss. I traced the miss to cyl #3. I bled it while running several times from both the pump end and the injector end and the miss didn't really change so I pulled that injector and tested it...it tested AOK cracking at 2850 with 4 nice spray patterns. For some reason it seems to me to be starving for diesel fuel. The miss I don't know as it didn't have it last week. Help!Thanks! Dana |
Replies:
Posted By: DougG
Date Posted: 08 Mar 2012 at 5:35pm
| Any fuel leak is a potential for air to get in ; i had a 200 that done that , it was an rubber sealing ring on the fuel line at the top of the fuel filter , the lines are flared, but still need a thick rubber sealing o ring on them , the fittings out of the tank are aggrivating cause for tape or sealing goop it really needs to be dry |
Posted By: Roddo
Date Posted: 08 Mar 2012 at 7:55pm
| Unless you have a charge pump sucking fuel to pressurize your injection pump I'd rule out air admission. A gravity fed system would just leak. The tank has probably rattled loose years of rust and buildup and its plugging your outlet in the tank. |
Posted By: BrettPhillips
Date Posted: 08 Mar 2012 at 9:40pm
|
YES! As Doug said, if it leaks fuel, it can and probably does leak air too. One way of finding leaks is to slightly pressurize the fuel tank with air (no more than 2-3 PSI, an air nozzle and a wad of rags often works well) and look for drips and wet spots. With the amount of sediment that you've already collected, I think I would spend some time repairing those shutoff valves too. It sounds like you may be using them quite a bit for a while. |
captaindana wrote:Posted By: captaindana
Date Posted: 09 Mar 2012 at 5:54am
| OK guys. I know, I will fix the issues from the tank outlets and keep widdlin' away. That skip though has me baffled as it's a new issue. Maybe I'll hook up a spare high pressure line on pump outlet #3 with a spare injector and run it to see if pump outlet #3 is making spray. |
Posted By: captaindana
Date Posted: 09 Mar 2012 at 6:24am
| Actually I was just thinkn...the injector tested perfectly. The new skip must be carbon holding up a valve on #3 so I am going to investigate that. |
Posted By: BobHnwO
Date Posted: 09 Mar 2012 at 7:49am
|
I would put some Marvel Mystery oil in the fuel tank and crankcase to remove varnish.
------------- Why do today what you can put off til tomorrow. |
Posted By: captaindana
Date Posted: 09 Mar 2012 at 4:49pm
| Update; I removed my ruber mounted hood [ugh] removed valve c g and adjusted all valves...twice. I think 5 exhaust and 1 intake. Nothing too bad except #1 was .025. I moved them all real good with a screwdriver down and let them snap back with the spring tension. Tomorrow I will clean the fuel gascolators. More to follow. Oh btw the compression sounds really good compared to before. |
Posted By: M Diesel
Date Posted: 09 Mar 2012 at 5:13pm
|
Just an FYI, but I have had gear primary charge pumps suck air in the input line joints before, without any fuel leak. They create little surge pulses on both sides. Not huge, but present. And of course it affects all. I'd vote for trash in the system, but that cylinder most likely simply has a valve sticking. Is it wet stacking?
|
Posted By: captaindana
Date Posted: 09 Mar 2012 at 6:35pm
| MD what is wet stacking? I don't think any valves were sticking but we'll see or hear on Sunday. |
Posted By: Gerald J.
Date Posted: 09 Mar 2012 at 7:40pm
|
In wet stacking, unburned fuel (from over fueling at idle or missing) collects in the exhaust pipe. Gerald J. |
Posted By: SteveM C/IL
Date Posted: 09 Mar 2012 at 7:41pm
| That is blowing black juice out the exhaust...unburned fuel |