VEB BERLIN SR59, Руководство по эксплуатации

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2.23 Rear power train
The power train from the transmission to the rear wheel is achieved by a roller chain which is
installed on the chain pinion gear at the gear box on one side and on the rear wheel´s sprocket
wheel on the other. A specially designed full encapsulation is provided, to enhance the durability of
these parts. The cycle of the roller chain from pinion gear to sprocket wheel is kept oil- and
dustfree by a special hose shaped two piece rubber housing.
Image 30. Secondary drive train (transmission / rear wheel)
The tension of the roller chain and the rear wheel alignment is adjusted by commonly known chain
tighteners that are attached to the rear fork.
2.231 Chain maintenance
The chain should be lubed once every 600 miles, using viscous motor oil which can be applied
through the little drilling in the rear end of the chain housing, after the cap screw has been removed.
For this task, the rear wheel should be rotated slowly.
However, a thorough cleansing of the roller chain especially of the inner joints, is necessary every
3000 miles. To do this, the chain is to be taken off and thoroughly washed in fuel. (chain links
should be bent to extricate the the gunk from the joints). After washing the chain, it should be
bathed in heated, fluid grease. The chain must be removed from the cooled off bath in time, so that
a little excess grease clings to the chain, making it slide nicely within the rubber