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Need to replace clutch in 990 David Brown Help

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11-22-2002 12:23:41

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I have a mid. 70s case that has clutch problems,It does not have a cab or a loader.I have heard that they are very difficult to work on but no one can give me much input on this tractor. I was told that the clutch and pressure plate are one assembly and are very difficult to service separately.I have worked on many clutch systems but this one has me worried any input would be greatly appreciated. thanks Herb

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Eddie in KY

11-25-2002 16:54:55

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 Re: Need to replace clutch in 990 David Brown Help in reply to Herb , 11-22-2002 12:23:41  
Do yourself a favor, go ahead and get the parts from Elmer. I went the salvage yard way and really wish, after its all back together now, that I had gone ahead and spent a little more for the reman stuff from him.

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11-22-2002 18:37:21

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 Re: Need to replace clutch in 990 David Brown Help in reply to Herb , 11-22-2002 12:23:41  
I can supply you with a pressure plate and disc with bearings, as well as a manual for the tractor. they are easy to replace. I can email a picture of the stand i made to mount on the front half to allow you to split the tractor with a car floor jack.

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Eddie in KY

11-22-2002 17:11:04

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 Re: Need to replace clutch in 990 David Brown Help in reply to Herb , 11-22-2002 12:23:41  
Dont know if the 990 is like an 885, which I just replaced a clutch in. If it is there are 4 bolts accessible only through the inspection hole. These MUST be removed before splitting the tractor. I would suggest a manual close by. It's a help, trust me. The tractor is easy to work on you just have to use common sense,and again, a manual is helpful. Be prepared to adjust the clutch a few times after its back in, if you dont do it just the way the manual says to do(utside the tractor). I just did an 885 clucth and pressure plate, if you have any questions feel free to ask. Oh yeah, I did mine with a loader still on the tractor, all in all it still wasn't bad to do.

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11-22-2002 14:59:20

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 Re: Need to replace clutch in 990 David Brown Help in reply to Herb , 11-22-2002 12:23:41  
These 990`s are no problem to replace a clutch on. Under 2 hours if you have no cab or loader .Done these when i was 16 and still at school.Take off the bonnet and disconnect the battery,Put two wooden blocks in the front axle Disconnect the two fuel lines from the tank ,take the 3 bolts out of the starter and the bolt on the opposite side at the oil filter.Theres two long bolts under the fuel tank undo these but don`t take them out.Disconnect the steering drag link at the balljoint and disconnect the throttle and cutoff rods at the injection pump.Undo the wiring loom connection under the fuel tank. There are 4 nut /bolts underneath to remove and with jacks in place on a concrete floor level them up with the trolley jack at the front take out the last 6 bolts , 3 each side at the front of the footplates on the side of the chassis. Oh and dont forget to disconnect the tacho drive cable in front of the starter.You should now be able to wheel the front half forward taking care not to bend the throttle rods, Ease up the 3 levers on the pressure plate and put a 3/4 unc nut under each one You can now remove the ring of bolts round the fly wheel . This should take no more than 1hr. The transmission plate is the first one out then a seperater plate and the pto drive plate there are 3 small springs round the fly wheel so don`t lose these as youwill need them later. Parts are easily obtained here in the UK as its a Borg & Beck clutch. On reassembly its often easier to leave the ring of bolts round the flywheel just tight enough to hold the plates in position once you have lined them up , as this allows the plates to move sligtly when jioning the 2 halves back together . the fly wheel bolts can be got at through the chassis opening latter when you set the clutch. Hope this helps Jimc

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11-22-2002 14:20:51

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 Re: Need to replace clutch in 990 David Brown Help in reply to Herb , 11-22-2002 12:23:41  
You need a guy named Elmer to answer you. He can sell you a Repair Manual to guide you in this job. I wouldn't tackle it without the manual.

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