Cold Start Timing Advance System (KSB) Pump Mounted (005-070)
B3.9 and B5.9 Series Engines
Section 5 - Fuel System - Group 05
Check the water temperature with a thermometer.
The multimeter should indicate a closed circuit below 32C
[90F] and an open circuit above 32C [90F].
Replace the switch, if necessary.
Install the original pressure relief valve or a replacement
into the KSB housing.
Cold Start Timing Advance System
(KSB) Pump Mounted (005-070)
Need For KSB on 1988 VE Pumps
Emission requirements for 1988 prompted the need for a
cold start timing advance system (KSB) to minimize white
After the engine starts, the wax motor-style KSB fully ad-
vances the ignition timing at low idle until the engine warms
up. The KSB is not functional after the engine reaches
71C [160F] coolant temperature.
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