1494

jimf · Aug 22, 2014

I have a case-international 1494 with the power shift 12 speed that stopped pulling. I didnt shift, clutch, or change anything when it stopped in its tracks. You can put it in any gear or range now without any result. Any ideas?

RGMartin · Aug 22, 2014

Any bad grinding noises/vibrations with it in gear?

Did you try it with the differential lock down?(Broken Spiders)

Were you pulling anything heavy when it happened?

Assuming the diff lock doesn't change anything, I would pull the cover under the clutch and see what if any parts fall out( Might be sheared rivets on the clutch plate).

Other possibilities would be broken input shaft, ring and pinion trouble, something in the range box...

jimf · Aug 22, 2014

No there is no grinding noise or anything at all. You cant hear or feel anything in any gear with or without the differential locked. The PTO still works. I was pulling a 15' bush hog. It was low on hydraulic fluid so I topped it off, but no help.

RGMartin · Aug 22, 2014

My money is on sheared clutch rivets or an input shaft. See what you can see through the clutch inspection cover.

If the powershift failed, I would think you would still have 1st gear on it.

Does it have a cab?

casenut1 · Aug 22, 2014

Sounds like the power shift is gone. When i was younger I was raking hay with a 770, 12 speed power shift. Going up a small incline without any noise or warning of any kind the tractor started coasting backwards. Had to be towed in and have the trans rebuilt.

RGMartin · Aug 22, 2014

(quoted from post at 12:54:15 08/22/14) Sounds like the power shift is gone. When i was younger I was raking hay with a 770, 12 speed power shift. Going up a small incline without any noise or warning of any kind the tractor started coasting backwards. Had to be towed in and have the trans rebuilt.

The DB hydra-shift shares nothing design wise with the Case Power-Shift. With the DB, unless it is a catastrophic failure(in which case it would make noise, and lots of it) you should still have 1st gear.

jimf · Aug 22, 2014

Thanks everyone, it is not a David Brown, it is a Case-International. (mid to late 80s) No noise at all. I will pull the inspection cover off tonight.Is there anything I can do to prove or disprove the power shift? When this thing failed it gave no warning or noise. It just stopped pulling.

casenut1 · Aug 22, 2014

OK , did not know if they were similar or not.

RGMartin · Aug 22, 2014

(quoted from post at 14:25:15 08/22/14) Thanks everyone, it is not a David Brown, it is a Case-International. (mid to late 80s) No noise at all.

A 1494 is 99% David Brown, everything but the decals and paint.

Thad · Aug 22, 2014

I agree with RG clutch hub would be my first guess. We have had several thru the years shear the rivets in the hub.

jimf · Aug 23, 2014

I took the inspection plate off and saw no rivets or broken parts. I can see the pressure plate spinning and the throw-out bearing sliding when the pedal is depressed. Everything looks normal.Since the power take-off is still working, does that mean the transmission input shaft is not broken?

RGMartin · Aug 23, 2014

There are 2 clutches and 2 shafts coming out of there. One inside the other. Totally independent of each other.

The PTO is the clutch closest to the flywheel, and inside shaft. The trans clutch is the rearward one, and outside shaft.

If it is a not a cab tractor, you can get the top of the transmission off and take a look inside without splitting it. Still lots of work.

I would still start with splitting it, and inspect the clutch plate. The rivets may still be stuck in the hub.

The only other trouble shooting shot in the dark would be to drop the hydraulic sump and look for stray parts that made their way to the strainer.

jimf · Aug 23, 2014

Thanks again! I will pull it in the shop and start the process of splitting it!

RGMartin · Aug 24, 2014

Another tip. Put the PTO into gear before you split it.

jimf · Sep 10, 2014

RG and Thad, you were right about the clutch rivets. They are sheared. I am now trying to get the clutch hub assembly out of the housing. I"ve turned it every way but the right way obviously. Are there any secrets to make it come out?

RGMartin · Sep 10, 2014

Out of what housing? The pressure plate?

Have any pictures?

Is your clutch have a bunch of little springs, or one big "belleville" flat washer shaped spring?

jimf · Sep 11, 2014

I don't have pics, but it's the tractor housing. The shaft pulled out when the tractor seperated and left the clutch hub in the housing. The housing has surfaces partially closing the hole where the clutch hub has to come out.

RGMartin · Sep 11, 2014

Do you have the pressure plate unbolted from the flywheel? The clutch disc and hub won't come out until you do, takes 6 long 3/8" bolts(9/16" heads).

jimf · Sep 16, 2014

Well, I got it out and finally got parts from Case-IH. The first order came in damaged and they located more at some dealership somewhere. They were going to loan me an alignment tool but looked for 3-hrs., without finding it. I have been looking for one on-line but having no luck. What other tractors use the same alignment tool?

Thanks for all your help!

jimf · Oct 4, 2014

Thanks to everyone for your help. I got it back in good working order, or did have it in good working order. I was bush-hogging some pasture and the tractor caught on fire. Too much chaff build up on the engine. I guess the turbo charger got hot enough to start it afire. I was lucky to put the fire out. Burned a lot of plastic lines and rubber hoses and wiring. This has not been a good season. If anybody with a 1494 can take photos of the engine area especially on the power steering side it will help. The more photos the better. I don't have anything to show fuel line paths, fuel return lines, and wiring, etc...

jimf · Oct 9, 2014

R.G., Thanks for your help. Will you send me a few more pics showing the lines to and from the fuel reservoir on top of the motor. I could see from your pics that the power steering pump vent tube goes up to the vent tube on the valve cover. With your help I'll get it. I am finishing up repairing the wiring harness now. I got the alternator rebuilt too. One thing at a time.

jimf · Oct 12, 2014

Hi Roger, I don't know if you sent me any more engine picsof your 1494 because I can not find them on the forum. If you don't mind, I would really appreciate more pics sent to my E-mail: [email protected] I need pics of the fuel reservoir on top of the engine and the source of the three lines going to it. Thanks

RGMartin · Oct 12, 2014

One goes to teh leak off pipe at teh injectors, one back to teh tank, teh bottom outlet goes to teh thermostart in teh manifold.

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