[AT] IH 2504

[Kenneth Gene Waugh]

Remarkably similar story here too, Herb!  I once had an old (even at the time, it was old!!) Chevy pickup, around a ’35 I think.  Same, identical problem.  As I recall things, It had sat under some trees with no gas cap on for a while and got a bunch of leaves, etc. in the tank.  Whenever I would let the gas get too low, the crud would choke off the gas supply.  Same drill, jump out, yank open the driver’s side of the hood, unfasten the carb inlet line, blow back, re-attach and get her going, all pretty much within one stop light cycle!

Gene Waugh
Elgin, Illinois



> On Jun 15, 2017, at 5:53 AM, Herb Metz <metz-h.b at comcast.net> wrote:
> 
> Spencer, had to laugh at your "I got really fast at reseating the arm on the 
> side of the road"; reminded me of our old 1936 Chevy car had some crud in 
> the gas tank and occasionally when fuel amount got low the crud would lodge 
> over the supply outlet and car would stop because of no gas. So, take wrench 
> from drivers side, get out, loosen gas cap, open right side of hood, use 
> wrench to remove gas line from back of carburetor, reach body down to blow 
> air back through gas supply line to dislodge crud particle from over gas 
> line in the tank, reinstall gas line to carburetor, close right side of 
> hood, tighten gas cap, get in, and go again.  Problem seldom occurred if gas 
> tank  supply was >half tank.  We get to where we could do that with dress 
> clothes not getting soiled. Herb(GA)
> 
> 
> 
> -----Original Message----- 
> From: Spencer Yost
> Sent: Wednesday, June 14, 2017 11:23 PM
> To: Antique tractor email discussion group
> Subject: Re: [AT] IH 2504
> 
> Surprised it ran much at all.   I had a kinda similar issue with a 70s  Ford 
> engine in a 78 Courier pickup (not the Mazda engine).  Had an overhead cam 
> and floating rocker arms that relied strictly on tight clearances to stay in 
> place on its pivot point.   One arm was getting worn to the point that once 
> the engine got hot enough one of the arms would occasionally fall off.
> 
> I got really fast at reseating the arm on the side of the road. (-;
> 
> Good luck and keep us up to date.
> 
> Spencer Yost
> 
>> On Jun 14, 2017, at 11:03 PM, Dennis Johnson <moscowengnr at outlook.com> 
>> wrote:
>> 
>> Last week I was at my Oklahoma cabin and finally figured out what was 
>> going on with my IH 2504. It would run for a few minutes until things 
>> warmed up, and then loose power and die. It was progressively getting 
>> worse. It acted like it was running out of fuel. Would set a minute, and 
>> then restart for a little, and die again. I thought it was a fuel issue, 
>> but gravity seldom fails and I had took settling bowl and card apart and 
>> all looked acceptable.
>> It finally dawned on me that I had a valve issue, and intake valve was 
>> heating up and holding open enough to ruin the vacuum where it would not 
>> suck fuel mixture into engine. Was not able to check compression because 
>> my special sockets were in my Texas shop.
>> Got some "charity case" Isuzu put together to clear my cabin garage (out 
>> temporarily-it is missing compression so I will need to pull head and fix 
>> valves) Then I drove the tractor in and pulled the head on it. Bit of a 
>> pain to do with loader on it.
>> Findings were:
>> #1 - bent pushrods was off of the rocker, so intake would not open and 
>> cylinder not firing.
>> #2 - significant exhaust valve leak
>> #3 & #4 - valves hold gas in head, probably adjustment was out on one or 
>> both.
>> Exhaust and Intake manifold was missing about 1/8" of casting on the #1 
>> port.
>> Head now at machine shop, and replacement manifold and gaskets are 
>> ordered.
>> I need to work on throttle linkage - it is stuck in one position and will 
>> not move. Also need to install some working and readable gauges.
>> Hopefully I can get head back and parts in so that I can  next time I go 
>> to cabin. Need to fine torque for head bolts, and valve adjustment values. 
>> I need to remember to get my old oversized plug sockets - plugs look 
>> larger than the normal 13/16" hex size. Only needed to use these special 
>> sockets once every 10 or 15 years, so I hope I can find them.
>> 
>> Dennis
>> 
>> Sent from my iPad
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