GM 2-53 engine

JD440ICD2006 · Post by **JD440ICD2006** » Mon Sep 18, 2006 2:33 pm

I was reading through the service manual on this engine and learned that the air box has a vent tube. It said to check this tube with the engine running and you should feel a stream of air coming out of it. I checked and could not feel any air. I took the line off and it was stopped up. Hard to believe the junk that came out when I took that line off.
The power increased and it does not smoke as bad as it did. I have also heard that if this line gets stopped up and oil builds up in the air box, the engine can run away running on crankcase oil. The fuel cut off will not shut it down as long as there is oil in it. It would be a real shame to ruin a good engine by not doing a 5 minute air box vent cleaning on a regular basis.
I am just sharing as I go, this engine is so different than any I have been around.
If you have other tips to help keep these engines alive, let us know.

Post by **Lavoy** » Mon Sep 18, 2006 5:10 pm

It is kind of funny, most or all of the bigger Detroit's I have seen have a runaway valve to kill them if blower loses a seal. I wonder why it was not considered necessary on the 2-53's, or was it just not specced on the John Deere application?
Lavoy

JD440ICD2006 · Post by **JD440ICD2006** » Mon Sep 18, 2006 7:56 pm

Lavoy,

Interesting that you mention the shut down valve. When I got my ICD, someone had it so that you shut it down with the throttle. I located a gizmo on the right hand side on the blower. It turned out to be a butterfly valve for shut down. I had to do some work but I now have it working so that it idles with the throttle and the shut down is done with the pull lever on the dash.
I have yet to see this valve in any of the manuals. Must have been added later. It looks to be a GM part.

Post by **Lavoy** » Mon Sep 18, 2006 9:28 pm

I am not 100% sure you should do it that way. My understanding was that the valve was runaway valve only, and not for stopping the engine. Plus, if you kill it that way, the injectors are still spraying fuel in the cylinders as it dies, as opposed to it dying from lack of fuel. Maybe no bid deal, but it will leave raw fuel in the cylinders. I guess I don't know the reason why, but all the diesels I have ever known are stopped by shutting off the fuel, so I assume there is a good reason for doing so.
Another thought is that it must put a terrible vacuum on the blower, they are positive displacement, so little room for air bleeding by. This might increase the stress on the blower seals and lead to premature failure, then you will have to use the valve for what it was really meant for.
As to yours having a valve, my guess is that at some time in it's life, the crawler has has a replacement engine installed, or a used engine out of another piece of equipement.
Lavoy

JD440ICD2006 · Post by **JD440ICD2006** » Mon Sep 18, 2006 9:32 pm

Lavoy,

What you say makes a lot of sense, but, there is no way to shut it down other than to set the idle screw down so low it closes the fuel. Mine does not look like the manuals as they show a solenoid that stops the fuel flow.
I will just set it back to shut down by fuel because I do not want to speed up a disaster.

Post by **Lavoy** » Mon Sep 18, 2006 9:45 pm

I know on the old Terex crawler that my brother had with an 8-71, you pushed the throttle all the way down to shut it off. Really should be no different than you are doing.
I wonder if you could add the solenoid to yours? Might be worth a trip to the Detroit shop, maybe it was/is available in kit form to retrofit yours.
Lavoy

2cycle · Post by **2cycle** » Tue Sep 19, 2006 1:04 pm

A 2-53 doens't take a solenoid and neither does most of the other detroits, the injecter is made to shut the fuel off when closed.. When the injector gets worn they don't shut all the way anymore. that could be the problem.
nels

ok farms · Post by **ok farms** » Wed Sep 20, 2006 1:13 pm

I read about the air box vent, i have a 2-53 also and was wonder where on it was this vent tube located, because i can't find one on might and it is blowing oil out mt breather in the vavle cover someone told me to look for that air box vent but i can't find it on mine. any help would be appreciated.

Post by **Lavoy** » Wed Sep 20, 2006 1:23 pm

I checked the parts book, and no solenoid, and no runaway valve. There is a shutoff cable, I assume that it does the same thing as turning the idle all the way down.
I think the vent is on the side of the block, but been a while since I saw one.
Lavoy

jac · Post by **jac** » Wed Sep 20, 2006 7:22 pm

Vent tube is on the left side of the engine and attaches into the air box behind the governor linkage

digitup · Post by **digitup** » Wed Sep 20, 2006 7:37 pm

I have a 253 in a buckeye trencher 1967 build with a shut down butterfly as original equipment And for the last 40 years has been shut down this way I agree with your theory Lavoy but it has always been shut down that way. It will idle down well below any oil presure[typical detroit] but still not shut off.You have to use the Shut down Or watch it self distruct slowly on dry berrings My neighbour has a Deere 425 farm tractor with a 253 in it Is there much difference in the build of that tractor from the Detroit motor built crawlers of that day .Digitup.

shinnery · Post by **shinnery** » Wed Sep 20, 2006 8:47 pm

I found and cleaned the vent tube on mine because the governor was leaking oil. I guess two screws are down in the pan because they were missing out of the governor. To get the governor off I had to remove the inspection cover to the intake, at the same time. I cannot figure a way to get either off or on separately. The shutdown cable to the injector rack is missing on mine, but it quits easily if I reduce the throttle too much.
There was about an 1/8" of gunk all in the bottom of the intake passages. and the vent was gunked solid. A little work with a piece of wire cleaned it nicely.
Bryce

Post by **Lavoy** » Wed Sep 20, 2006 10:37 pm

435 had the same engine as the crawler, no difference at all. 435 was for the most part, a green 440ID without the heavy cast iron front end.
Now that my usually foggy memory has cleared somewhat, I remembered that the old Terex crawler we had used a knob you pulled out on to kill the engine. It was not hooked to the air valve, must have been hooked to the fuel system somehow. If you pulled it out slowly, you could make the engine idle way down, and then if you let go, it would return to normal idle. Seems to me it took a pretty good pull to hold it out so the engine quit.
Lavoy

russ61 · Post by **russ61** » Thu Sep 21, 2006 3:50 am

I have a Terex 82-30 with a 6-71 detroit.From what I can see it does shut down the fuel system.Lavoy's right about the knob to pull for shut down.I need to learn to post pictures on here as when I moved my 1010 to the garage for rebuild,I took the Terex and a chain and picked up the 1010 about 4 feet off the ground

! hard nose to blade and drove it to the garage.Quite an interesting sight!1010 currently well scattered on the floor.Winter is coming so should be able to get back on it I hope!
Russ61

digitup · Post by **digitup** » Fri Sep 22, 2006 2:36 am

My old 71 and 92 series have a shut off valve between the gear pump and the injectors.Well the 6V92 is a 1982 version so it is not that old I guess.There are probably quite a few different versions of fuel systems over the many years of manufacturing .Digitup.

JDcrawlers Messageboard

GM 2-53 engine

GM 2-53 engine

detroit

Who is online