TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Cold Start Timing Advance System (KSB) Remote (005-046)
Section 5 - Fuel System - Group 05
Page 5-87
KSB Hardware Definition
There are currently two versions of pump-mounted wax
motor-style KSBs released in the Cummins system and one
remote-mounted version. The remote mounted option is
necessary in applications where the pump-mounted KSB
causes interference (i.e., with the air compressor).
Remote Mounted KSB
The remote-mounted KSB is used on B Series automotive
engines that 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 evi-
denced by a fuel leak.
The four-cylinder engine using remote mounting requires
the temperature switch to be installed in the cylinder head
as illustrated.
L-947