Thanks very much for the help @Bald n Grumpy @Netherfield
Show us your David Brown Tractor!
- Thread starter Selectamatic
- Start date
Netherfield
Member
- Location
- West Yorkshire
One other thing, once you have it all back together use/run it round for a few hours and then recheck tightness of all the connecting bolts.
After 20 hours or so drop the gearbox oil and change the filters and clean the gauze filter for the Hydrashift, because your certain to have some bit and pieces fallen in there.
After 20 hours or so drop the gearbox oil and change the filters and clean the gauze filter for the Hydrashift, because your certain to have some bit and pieces fallen in there.
Okay will do
Hello, I was just wondering how you separate the piston from the crankshaft. We loosened the nuts but the bottom part isn’t coming out. Does anyone know what to do?
Gentle tap with a hammer
Netherfield
Member
- Location
- West Yorkshire
Block of wood tapped on the nuts showing usually lifts the con rod up.
Perfect! We have the pistons out now would anyone have any time deas as to how we get them in with the piston rings ?
Netherfield
Member
- Location
- West Yorkshire
You need a ring clamp for that job
Similar to this, https://www.amazon.co.uk/NEILSEN-TO...ocphy=9046678&hvtargid=pla-450306597302&psc=1
Measure the diameter of your piston to get the corrct size clamp.
You need a piston ring clamp, to compress the rings. They are very brittle and can easily be broken so proceed with caution.
Also check the the con rod is in the correct way round.
I have not worked on a DB engine but most manufacturers specify which way round the rods go.
Some have FRONT cast into them, others may say numbers to camshaft hence why I suggested you get a workshop manual.
Also check the the con rod is in the correct way round.
I have not worked on a DB engine but most manufacturers specify which way round the rods go.
Some have FRONT cast into them, others may say numbers to camshaft hence why I suggested you get a workshop manual.
you beat me to it
- Location
- Central Scotland
Have used a bit of plastic down pipe with a split in it and a jubilee clip before.
yes, I have been known to cut up tin cans of the appropriate size and a pair of pliers but not something I recommend.
I’ve ordered a ring clamp now.
Pretty sure it's numbers to the cam shaft assuming they have been fitted correctly
Make sure the piston rings are not all aligned ie the open ends of the rings should be staggered around the piston not all in a line.
Were the rings fitted correctly? ( right way up , and the oil rings alternated) if your not sure best to check before you reassemble or your wasting your time.
Use plenty of oil on the piston and ring clamp
Make sure the piston rings are not all aligned ie the open ends of the rings should be staggered around the piston not all in a line.
Were the rings fitted correctly? ( right way up , and the oil rings alternated) if your not sure best to check before you reassemble or your wasting your time.
Use plenty of oil on the piston and ring clamp
Netherfield
Member
- Location
- West Yorkshire
Father in law brought me a clamp From David Brown's, circle of tin with two handles attached, squeeze with one hand and tap down with the other, I could never get to use it properly, always seemed to snag a ring on top of the block, Maybe took a lot of practice to get it right, them chaps on the production line could drop pistons into the block in seconds.
yes I guess if you are doing it day in day out you get very proficient at it, I have a draw full of ring clamps of various styles and sizes built up over 60 years.
Netherfield
Member
- Location
- West Yorkshire
Someone who had been on a tour of banner lane told me how a nut in the gearbox had to be torqued and was essential it was done. Went out on the production line and someone picked up that the nut was not checked with a torque wrench just a bloke with a big spanner and a lump hammer. This was brought to the attention of the tour guide who picked up a torque wrench and checked about 6, all were spot on. Think maybe it was a party trick for the tour guides
Was father in law at browns? What did he do there
How do I know they are fitted right way up and oil rings alternated?