My camshaft and timing gear broke, and need to be replaced.
I see that the maintenance supplement specifies:
"The five journal camshaft is supported in unbushed bearing bores or renewable type bearing liners (bushings). Camshaft journal diameter is 2.0596-2.0600 (52,31384 - 52,3240 mm). Desired journal to bore bushing clearance is 0.002-0.0035 (0,0508 - 0,0889 mm) with maximum wear limit of 0.006 (0,1524 mm)."
The mm measures is added by me.
It is quite accurate measurements, 1/100 of a mm.
It is not easy to get accsess to the bushings either.
Anybody have any experience with measuring the bushings?
Kjetil
Measuring camshaft bearing
Re: Measuring camshaft bearing
The cam runs directly in the block and I'm pretty sure oversize bushings are unavailable now. If you did find any the engine would need to be removed and stripped and the cam drillings line bored to fit the new bushings. The wear tends to be at the bottom of the drilling from the downward pressure on the camshaft causing the hole to become oval and generally means a replacement engine block if they are excessively worn. With the camshaft removed you can measure the drillings with a long reach bore gauge and with the sump removed you can see any damage to the cam drillings from underneath. Any signs of what caused the camshaft to break?
My biggest fear is that when i die my wife will sell my tractors for what i told her they cost
Re: Measuring camshaft bearing
As John says this is a big job, if however you're up to it there are some bushes on ebay now:https://www.ebay.co.uk/itm/134109770527 ... A5DJ2JZC5G
The manual covers fitting bushes extensively. Where did the camshaft break? What serial number is this engine? The 3 bolt types were known for issues but the single bolt type is largely ok.
Beware when buying new camshafts, I only recently found the only one being sold is 528E-6250D, which shouldn't really be fitted with Power Major type rockers. This is because 528E-6250D has a cam lift of 0.303" instead of the 0.255" on E1ADDN-6250D. Both camshafts run from 61 (1609839 and 530E-25470, 502E-60515, industrial S236238) onwards, but one is for tractors with Power Major rockers and the other is for lorries with earlier rockers (lorries never used Power Major rockers) the difference being 3/16" less on the adjuster side on Power Major rockers. Industrial engines are generally much like lorry engines. Using the wrong camshaft could bend all push rods and possibly cause a piston to strike a valve, although I've never known of such things actually happening. The valve lift will be huge though, which could affect running. Both these camshafts require the heavier valve springs and correct head (E1ADDN-6052H onward).Probably not the best post for this but a better one will come later on.
Some pics will be handy, they might give a clue to what happened.
Sandy
The manual covers fitting bushes extensively. Where did the camshaft break? What serial number is this engine? The 3 bolt types were known for issues but the single bolt type is largely ok.
Beware when buying new camshafts, I only recently found the only one being sold is 528E-6250D, which shouldn't really be fitted with Power Major type rockers. This is because 528E-6250D has a cam lift of 0.303" instead of the 0.255" on E1ADDN-6250D. Both camshafts run from 61 (1609839 and 530E-25470, 502E-60515, industrial S236238) onwards, but one is for tractors with Power Major rockers and the other is for lorries with earlier rockers (lorries never used Power Major rockers) the difference being 3/16" less on the adjuster side on Power Major rockers. Industrial engines are generally much like lorry engines. Using the wrong camshaft could bend all push rods and possibly cause a piston to strike a valve, although I've never known of such things actually happening. The valve lift will be huge though, which could affect running. Both these camshafts require the heavier valve springs and correct head (E1ADDN-6052H onward).Probably not the best post for this but a better one will come later on.
Some pics will be handy, they might give a clue to what happened.
Sandy
Re: Measuring camshaft bearing
Hi
Thanks for your response.
I haven't removed the camshaft yet, but by turning the camshaft, I can see that the camshaft is not rotating when looking into the fuel pump opening.
I believe it is broken just behind the front plate. None of the tappets are moving either. The serial number is 08D958055.
I noticed some oil leaking through the timing cover but continued to use the tractor (which was unwise). It ran for several hours until it finally stopped.
A couple of the teeth on the timing gear are broken, as well as the camshaft.
When I have the engine disassembled, I will measure the bushings for any wear.
Not sure if I will do some work out of it, but just to know.
I plan to purchase a long-range bore gauge to take accurate measurements.
Kjetil
Thanks for your response.
I haven't removed the camshaft yet, but by turning the camshaft, I can see that the camshaft is not rotating when looking into the fuel pump opening.
I believe it is broken just behind the front plate. None of the tappets are moving either. The serial number is 08D958055.
I noticed some oil leaking through the timing cover but continued to use the tractor (which was unwise). It ran for several hours until it finally stopped.
A couple of the teeth on the timing gear are broken, as well as the camshaft.
When I have the engine disassembled, I will measure the bushings for any wear.
Not sure if I will do some work out of it, but just to know.
I plan to purchase a long-range bore gauge to take accurate measurements.
Kjetil
Re: Measuring camshaft bearing
There is no way the engine could run with that problem, if the leak was from the front crank seal it's a very common one, not really a big one to worry about as long as there's no real change in the oil level as a result (but now you're going to get in there definitely fix it, it should be easy enough once you have to get in there). I'm wondering if it could be the key that broke, it doesn't however explain the broken teeth on the gear. The gear can only be found second hand. I think it's good to check, you never know what you might find. Some pics would still be great, if the parts are as you would expect this is a rare problem. Is the auxiliary shaft turning?
Sandy
Sandy
Re: Measuring camshaft bearing
It was a hole or a scratch in the timing cover.
I assume one of the broken teets was the cause.
So it was not a leakage from the gasket.
I assume the gear was not more damage d than it was able to do the job for some time, but eventually a major breakdown occur.
I will see if I understand how to put picture in here.
Kjetil
I assume one of the broken teets was the cause.
So it was not a leakage from the gasket.
I assume the gear was not more damage d than it was able to do the job for some time, but eventually a major breakdown occur.
I will see if I understand how to put picture in here.
Kjetil
Re: Measuring camshaft bearing
Excellent pics, wow what damage, looks like the gear is cracked from crushing the departed tooth. I'm amazed it ran after that, you definitely wouldn't keep the oil in well with that (definitely caused by the tooth being hammered into the soft cover). The front crank seal looks pretty good, I suspect you'll need to dismantle the engine fully as then cleaning should be easier. Some general pics would be nice too, but that's just for fun as I really like seeing different Major's. Can't really say much more till the state of the camshaft is established.
Sandy
Sandy