On 4 Sep 1997, dstauffa@csc.com wrote:
> Is not the metering unit per se that is of concern but the shuttle inside.
> The metering unit is the most complex and critcal part of the Lucas PI
> system.
I wouldn't say the metering unit shuttle is a particularily complex item,
on the contrary it is quite simple. It does, however, involve a couple of
high precision parts with minute clearances.
I've never seen any failure og the internal parts of the metering unit,
and I'm really unsure whether they can be repaired as such, other then
by replacement.
What DOES fail, however, is the external vacuum control contraptions.
Some failure points:
1. Vacuum leaks.
2. Leaking diaphgram.
3. Breakage of the small plastic parts connecting the diaphgram
to the cam roller.
None of these could of course never have anything to do with fuel
lubrication properties.
These are all easily repairable.
> If any internal component fails, the entire unit must be
> dissassembled, repaired and relcalibrated. The latter is the tricky part.
Not really, it is in fact pretty easy to do.
It involves a reasonably accurate vacuum meter, a common feeler gauge,
and a couple of pices of plastic tubing, including a T-piece.
The first time I tried this I had an arrangement that also involved
using a vacuum pump and a valve. I soon discovered I had more control
simply sucking with my mouth, and using the tongue placed over the end of
the tube as a valve!
Egil
--
Email: egil@kvaleberg.no Voice: +47 22523641, 92022780 Fax: +47 22525899
Snail: Egil Kvaleberg, Husebybakken 14A, 0379 Oslo, Norway
URL: http://home.sn.no/home/egilk/ PGP: finger:egilk@sn.no
|