Ben
The L'Hotellier coupling disassembles by driving out the spring roll pin
in the barrel of the coupling. The roll pin is horizontal and from
memory a 2 mm diameter pin punch (like with Schempp-Hirth gliders) is
the tool you need to tap it out.
The piston is then extracted down the centre of the coupling, and the
rest follows.
I have not been involved in this with any variant such as where sleeves
were involved such as with the LS4's.
I am unaware of where one might get a spare replacement spring other
than by salvaging it from another unit. But then the spring has to be
serviceable. I guess the load test on the locking slide (with coupling
reassembled) as called for in the AD does that. Then again I wouldn't
use one from a rejected/removed coupling with 3,000 hours on it as
springs ultimately exhibit fatigue and fail.
New L'Hotellier couplings are available from CGB Bearings in Melbourne.
But I am not sure how the standard coulpings relate to the variant with
additional sleeve. The couplings really don't cost all that much when
compared to a lot of stuffing around with old parts.
Regards
Roger Druce
On 14/01/2011 9:00 AM, bcole...@xstratacoal.com.au wrote:
Hi all,
One of my hotelier couplings is not functioning correctly - the spring which
drives the wedge was sticking out of the wedge slot. I believe it is deformed
and would like it replaced. DG suggested I could change the spring - but I
can't see how to access it. It may be that DG thought I wanted to replace the
LS sleeve spring. I can't find any good references to rebuilding hotelier
couplings. I am waiting for a DG reply.
Has anyone here had any experience rebuilding hotellier couplings or know
whether the internal spring is replaceable?
Thanks, Ben Coleman
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