Information that is required to understanding and the determining of the root cause of a piston pin joint failure Caterpillar

Information that is required to understanding and the determining of the root cause of a piston pin joint failure [TIBU3980]



October 15, 2003

AVSpare Products




3500 Family Generator Sets and

Power Modules

Machine Engines All 3500 Series

3500 Family All


Component Code 1214


Information that is Required to Understand and to Determine the Root Cause of a Piston Pin Joint Failure.


In the past not enough information has been collected in order to understand and determine the root cause of a piston pin joint failure.


The following is a list of information that should be collected for performing a piston pin joint failure analysis. This data is necessary so that the entire operating conditions are understood and considered. In general, the more information surrounding the failure that is provided, the more accurate a root cause determination will be.

General Information

Engine Type (3516B, 3512B HD)


Engine Model (E274, E448)


Engine Serial Number


Engine "Vintage" (New, Reman)


Application (Gen Set, 793C)


Machine Serial Number (If applicable)


Rating (Test spec)


Engine Hours


Component Hours (If different from engine hours)


Oil Type (Name and grade)


Oil Filter (Manufacturer and model)


Equipped with prelube? (Is the prelube being used)


Servicing Dealer


Location (Customer Name, Mine Name)


For Dealer Rebuilt Engines

What facility rebuilt the engine?


When was engine rebuilt?


What was break in cycle of rebuilt engine?


Part Numbers & Date Codes (New,Reman, or Dealer Reused)

Cylinder Pack


Crown As.






Top Ring


Intermediate Ring


Oil Ring




Cooling Jet


Pin Retaining Clip


Maintenance History

S?O?S Data for current engine


Oil Change History / Maintenance Period


Location oil changes were performed (in the field or at the shop)


Valve Lash adjustment history


Air system pressure check history


Engine Repair Log for current engine


ECM/VIMS downloads


Operating/Environmental Conditions

Climate (Temperature)


Altitude (Within 1000 feet)


Type of mine (Pit, rolling terrain, material mined) - if machine


Type of loading (Uphill haul, pushing overburden)


General description of operating conditions (hours run per day, load factor)


Supplemental hardware (JW heaters, ether system, oil renewal)


Cycling (Number of engine starts per week)


Conditions Surrounding Failure

(Provide a general account of the type of operation prior to failure.)

How was the problem noticed?


What happened?


Was blowby measured recently? (What were the results?)


Summary of recent alarms and shutdowns, and the response to each alarm or shutdown.


When removing parts from an engine

Keep all parts from a given cylinder together.


Parts must not be cleaned or over handled.


Label cylinder number on crown, skirt, pin and liner.


Indicate which direction faces front with respect to the engine on crown, skirt, pin and liner.


If possible, provide 2-3 additional (unfailed) cylinder packs from the same engine (label in same manner).


Cooling jets should also be sent with cylinder pack (labeled).