Cummins 4BT – Remote Mounted KSB

The remote mounted KSB is used on B series automotive engines which have an air compressor.

Caution: Most pumps will have a shim between the KSB and the timing piston. This shim must be reassembled
between the cover plate and the timing piston. If this shim sticks to the KSB and is installed with the remote
mounting hardware, it will block the regulating valve drain path and damage the pump. This damage is usually
evidenced by a fuel leak.

The four cylinder engine using remote mounting requires the temperature switch to be installed in the cylinder head
as illustrated.