CMI-M8V9S-03

Cummins ISX Fuel Pump Campaign
Discussion
March 26th 2015
Background / Changes
ƒ Campaign Background:
– August 2014 – Cummins launched Campaigns with Temporary Repair Practices (TRP) guided
toward replacing and inspecting the ISX12 and ISX15 fuel pump components (barrels, plungers,
tappets)
– 20% of fuel pump campaign has been completed, which provided data for continued investigation
• To date: 97% of all pumps returned met reuse guidelines
• Cummins now knows that debris is the main failure mechanism impacting the fuel pump
– Cummins has released a redesigned Lubricating Oil Filter Bypass Valve
• New valve provides more effective sealing capability
• Cummins has high confidence that the new valve will better protect the fuel pump and improve oil flow
conditions during momentary high oil filter restriction
ƒ Campaign Changes:
– Stop the current C1555/1556 Fuel Pump campaigns and associated TRPs – Effective April 1, 2015
– Supersede to a new Lube Oil Filter Head Bypass (LOFH) Valve campaign – May 1, 2015
Lube Oil Filter Head (LOFH) Bypass Valve Specifics
ƒ Located on hot side of engine, within the oil filter housing.
ƒ New design reduces leakage when closed.
ƒ Precision molded and machined seat/plunger interface.
First LOFH BV went into product at JEP engine plant on February 20th
Driven to Improve Customer Uptime
ƒ More Effective Solution:
– All pumps were inspected as part of the campaign. Inspections showed greater than 97% of fuel pump
components being replaced met reuse guidelines.
– We have identified a more effective repair that helps prevent fuel pump failures and can be implemented
faster, which minimizes downtime for our customers.
ƒ Better Fuel Pump Protection
– Re-designed lubricating oil filter bypass valve ensures better protection of the fuel pump.
– The re-designed lubricating oil filter bypass valve is based on a proven design used in
Cummins mid-range engines.
– Extensive testing and analysis confirms new repair direction.
ƒ More Uptime
– A less invasive repair that can be completed in less than an hour at any location.
– We can ensure ample supply of parts to complete the repair with minimum customer
downtime.