Re: Half shafts & Oil slingers
Posted: Tue Dec 11, 2001 3:48 pm
hi Tony - half shafts DO vary, but they should be exactly 1" diamater. The
ones I make use hot-rolled nickel-chrome-moly steel, and the bars are
usually within a few thou of correct size. What varies more, is the size of
the slingers: I have a pair of Moss & a pair of Abingdons, and all four are
different!!! The Moss ones have a very shallow groove, which will very
quickly disappear through wear as the half shaft flexes. Not only that, the
LHS is under-size. The A/S ones are a loose fit.
The other point is that all axle casings are slightly different, some are
distorted, and if the oil slingers are squeezed they will have to be reamed
out after pressing in. For this you need an adjustable reamer. But what
size? If you go to, say, 25.5mm (1.004") the oil-scrolling effect will be
quite good, but the flexing of the half-shaft will wear it away. If looser,
it will last longer but not work so well. The worst situation is to have
them too tight: friction will heat them up, they will seize on the shaft and
spin in the axle case. They can then rattle along the shaft and fall into
the diff when the shaft is withdrawn, as you found. An even worse scenario
is that friction can heat up the shaft so much that the heat-treatment is
destroyed (I have seen some that had gone blue) and the shaft breaks.
Just forget them and fit a pair of my new hexagonal hub-nuts with double-lip
seals in them, which do a far better job. Only 25 GB Pounds + postage!
ocTagonally
Roger Furneaux Devon England
>A query for the collective wisdom! > >I recently had both half shafts out to change diffs. >I noticed that the off side oil slinger was missing and subsequently found >it (unusable!) in the bottom of the diff casing. I replaced the slinger and >on replacing the half shaft discovered that it would not pass through the >same. I tried an older half shaft which did pass through, so clearly >different diameters and the reason that the slinger was in the diff casing; >the P O had obviously been there and knocked the slinger out in the attempt >to locate the half shaft. > Both shafts fit into the diff carrier though one obviously slightly snugger >than the other. On checking previous receipts I concluded that the half >shaft purchased in '98 from N T G was the offending item. >Question - is there a move to a slightly greater diameter and thus stronger >shafts, then dispensing with the slinger or reaming it out, or is this shaft >a rogue item? >Has any one else had a similar experience? > >Regards >Tony TC 9825 > > > > > >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > >