Check whether the size group of the piston set matches the size group of the cylinder liners

The oil pump is removed for replacement or repair when the pressure in the lubrication system drops below the permissible level, when the gears are noisy and the pressure reducing valve plunger is stuck

Remove the oil sump and crankcase gasket

Remove the oil pump

K-151, K-151D carburetors are installed on engines of model 402 and 4021.

The K-151 carburetor (Fig. 1) consists of three main detachable parts connected through sealing gaskets with screws

Page 2 of 8