Case/David brown 1394 Clutch replacement.

[YoungFarmer23]

Hi there, I've got an old case 1394 high crop and it's clutch has recently blown.

I was hoping to find someone who could help me with the parts that I'd need and maybe a rough idea of how I would go about splitting the tractor and changing the clutch.

If anyone has any knowledge they'd like to share with me it would be much appreciated!

Thank you.

 

[Gapples]

Hi there, I've got an old case 1394 high crop and it's clutch has recently blown.

I was hoping to find someone who could help me with the parts that I'd need and maybe a rough idea of how I would go about splitting the tractor and changing the clutch.

If anyone has any knowledge they'd like to share with me it would be much appreciated!

Thank you.

This bloke on YouTube has a series of videos doing a 1394 clutch which may help

 

[YoungFarmer23]

This bloke on YouTube has a series of videos doing a 1394 clutch which may help

Thank you very much, I’ll have a look!

 

[Alchad]

First of all do some research - Google for videos and try to find an online repair manual, or failing that buy one which will guide you on the basics. I have a I&T manual which does a good job on covering the basics - page from relevant section attached below, it’s for the 1390 but doubt there will be much difference for the 1394. I’ve got a 1390 and haven’t replaced the clutch myself but have watched it done by a professional.

A few things which stood out

1. You’re dealing with heavy kit so be very careful

2 You really need a splitting frame

3. MOST IMPORTANTLY make sure you wedge the front axle and frame to stop engine tipping

 

[YoungFarmer23]

First of all do some research - Google for videos and try to find an online repair manual, or failing that buy one which will guide you on the basics. I have a I&T manual which does a good job on covering the basics - page from relevant section attached below, it’s for the 1390 but doubt there will be much difference for the 1394. I’ve got a 1390 and haven’t replaced the clutch myself but have watched it done by a professional.

A few things which stood out

1. You’re dealing with heavy kit so be very careful

2 You really need a splitting frame

3. MOST IMPORTANTLY make sure you wedge the front axle and frame to stop engine tipping

Okay thank you, I’ll do some research and try get some manuals.

 

[mac102004]

My video was posted above but I'll add a bit.

I used 2 trailer Jack's and bolted them onto the side of the frame with a brace between them, it worked quite well and was much cheaper than buying a splitting rail. This setup won't work for all tractors but it works for the 1394, and you'd have to have a good concrete floor to roll them on ideally.

When you replace the clutch buy the complete unit as I did in my video. This is the new updated LUK unit but I think the original style is also available.

I made a tool for aligning the clutch, the measurements are in the service manual. At the time I turned one down out of delrin on the lathe, but one could also be 3D printed easily if you know someone who has one. I'm sure you could get along without one if you had to though.

Make sure you replace all the bearings in there especially the pilot bearing. You'll need a blind hole bearing puller to remove it or you can use some bits of rag and grease and pound it inside with a punch thus forcing the bearing out.

The service manual I think is available in pdf on the David Brown Tractors facebook group for free.

Overall it's not a hard job, just take your time at it, should go pretty smoothly

 

[Bald n Grumpy]

When you say clutch is blown what's it doing?
Splitting rails are good but it can be done safely with a trolley jack.
Barcley Williams your best place for parts and advice.
If this is your first time splitting a tractor is there someone you know who can assist and guide you for your first.
When sliding back together don't force it and if you have to have a complete clutch their flipping heavy on your own

 

[andybk]

Don't skimp on new clutch quality ,get a luk or similar, barclay Williams do a good one ,I bought a cheapie had to do it again 12 months later after thrust bearing seized and wore the forks off ,bit of a pain to do on your own ,local repair man is best option with all the kit ,bit cheaper if you strip all the bonnet etc down before it goes in

 

[YoungFarmer23]

When you say clutch is blown what's it doing?
Splitting rails are good but it can be done safely with a trolley jack.
Barcley Williams your best place for parts and advice.
If this is your first time splitting a tractor is there someone you know who can assist and guide you for your first.
When sliding back together don't force it and if you have to have a complete clutch their flipping heavy on your own

The tractors not able to get up hills with any sort of load but it will still just drive round the farm yard.

 

[Tractortech]

So 'Blown' is a bit of an exaggeration. It's just simply worn out..
If it's hydraulically operated, have you checked operating system. Same of it's mechanically operated, it may only need adjusting..

 

[andybk]

The tractors not able to get up hills with any sort of load but it will still just drive round the farm yard.

just had our 990 done exactly the same , will work fine in low gear , , get it done before it wont go anywhere or you will be stuck somewhere awkward, you will wish you had done it then lol

 

[YoungFarmer23]

So 'Blown' is a bit of an exaggeration. It's just simply worn out..
If it's hydraulically operated, have you checked operating system. Same of it's mechanically operated, it may only need adjusting..

We’ve checked the adjuster and it’s fully maxed out.

 

[Bald n Grumpy]

We’ve checked the adjuster and it’s fully maxed out.

Sounds like you need a new plate fitting but it may be worth backing the adjuster of a little just to see if it helps as if it's over adjusted the clutch can slip under load.
If you do split the tractor just take your time as it's pretty straightforward you need to check that you disconnect everything and you'll need to drain the backend oil . Before you start reassembly make sure the PTO centre shaft is pushed right in and engaged as they will slide out sometimes when your splitting.
Sounds like you've got a high clearance model so make sure you have good jacks/axle stands or plenty of solid timber blocks as it's not going to be as stable as standard clearance. If you've got front weights fitted take them off beforehand as I have heard of them over balancing once parted.
Good luck

 

[YoungFarmer23]

Sounds like you need a new plate fitting but it may be worth backing the adjuster of a little just to see if it helps as if it's over adjusted the clutch can slip under load.
If you do split the tractor just take your time as it's pretty straightforward you need to check that you disconnect everything and you'll need to drain the backend oil .
Sounds like you've got a high clearance model so make sure you have good jacks/axle stands or plenty of solid timber blocks as it's not going to be as stable as standard clearance. If you've got front weights fitted take them off beforehand as I have heard of them over balancing once parted.
Good luck

Thank you very much!

 

[Abacus]

First job is to put the put in gear, trailer jacks work well bolt them to the front cab bolts back half and on the rail front half artic landing legs work well speshaly if you can get the one's with the wheels. If you are uoesing a spliting rail and it's hi clearance take off the wheels and king pin assembly should slide out the front axel and the back wheels get it lower to the ground splitting rail aren't normally designed for hi ground Clarence tractors

 

[YoungFarmer23]

Does anyone know of anyone in the norfolk area that might be able to do the job?

 

[Exfarmer]

I would not advise anybody to do it without experienced assistance for the first time. Bad enough doing it on a 30 hp cabless tractor with no experience especially if you do it with trolley jacks and no rails

 

[Exfarmer]

Does anyone know of anyone in the norfolk area that might be able to do the job?

Where are you in norfolk, its a big county

 

[YoungFarmer23]

Where are you in norfolk, its a big county

Just outside of Norwich.

 

[Exfarmer]

South farm engineering at Larling