Hurth Transmission ID


I am trying to identify the Hurth Transmission in our 1983 Mango and need
some help. The data tag is damaged. The only manual we have is in French and
is for a HBW5,10, or 20 The manual drawings do not seem to match up with what
we have mated to our Perkins 4-236. Our transmission has the shifting arm on
the top, not the side as shown in drawings. Our buyers survey refers to it as
a Hurth 4 transmission. The transmissiion shifts fine but makes a
fair"clunk" while doing so. Is this normal for these small and simple transmissions?
Any help would be appreciated.
SV Eshamy Michael P. McCarthy

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