Clark-Hurth transmission

The 3 speed and forward-neutral-reverse transmission in the Terex Square Shooter 8042 telehandler has the following information on the id plate:
Dana Spicer Clark-Hurth
Model 12.2HR18312-3
SN ZBEA052620
10/99

Aiming to get a service and repair manual and parts book for this. I have to replace the seal as it is weeping and contaminating the driveline park brake disc..

Should I try a Spicer parts dealer?

Any comments on a Model 18000 manual ... is this correct?

Thanks in...

Clark-Hurth transmission

Clark-Hurth transmission