CHAIN 2990393 - Caterpillar

The time allowance is intended to include all related tasks.
Product smu/age whichever comes first Caterpillar Dealer Suggested Customer Suggested
Parts % Labor Hrs% Parts % Labor Hrs% Parts % Labor Hrs%
*******Group 2*******
0-250 hrs,
0-12 mo 100.0% 100.0% 0.0% 0.0% 0.0% 0.0%
This is a 5.0-hour job for Group 2
The time allowance is intended to include all related tasks.
Product smu/age whichever comes first Caterpillar Dealer Suggested Customer Suggested
Parts % Labor Hrs% Parts % Labor Hrs% Parts % Labor Hrs%
*******Group 3*******
0-250 hrs,
0-12 mo 100.0% 100.0% 0.0% 0.0% 0.0% 0.0%
This is a 5.0-hour job for Group 3
The time allowance is intended to include all related tasks.
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Rework Procedure
Remove surrounding components as required to access valve cover.
Remove the valve cover, injector harness, and valve mechanism per instructions in SIS.
Note: The injectors do not have to be removed for this procedure.
Mark and remove valve bridges such that they can be re-installed at same locations.
Place the M7X-2941 gauge over all 4 valve stems of the cylinder being checked (See figure 1).
The ?UP? and ?DOWN? markings on the gauge along with the cutouts for the injector connector/hold down bolt and the head bosses (if equipped) should be a guide for proper positioning.
The cylinder passes the gauge test if the gauge can be placed over all 4 valve stems at once.
If the gauge will not sit on the 4 stems together, the cylinder head should be removed and all valves and guides for the offending cylinder head should be replaced.
When all 6 cylinders are checked and repaired (if required), re-install the bridges, valve mechanism, injector harness, and valve cover per SIS instructions.
Note: Bridges should be re-installed in original locations.
Note: Special care should be taken to insure pushrods are positioned correctly after valve mechanism is installed.
Note: Valve lash should be set after valve mechanism installation.
Re-install surrounding components.
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