Durst RCP–20 RA–4 Conversion:

parts list

• 10-XL–037
• 30-XL–037
• 130 XL belt

bought from www.bearingshop.co.uk they cut custom bore holes and grub threads.

The large gear goes on the motor axle (you need to trim down the fan) and the small one on the shaft.

Disconnect heaters before turning on without water.