VALVE 5418875 - Caterpillar

ACTION REQUIRED
Replace PCV spool. New spool has improved timing lands to correct galloping issues. Replace PCV spring with stiffer part.
Refer to the attached Rework Procedure.
SERVICE CLAIM ALLOWANCES
Product smu/age whichever comes first Caterpillar Dealer Suggested Customer Suggested
Parts % Labor Hrs% Parts % Labor Hrs% Parts % Labor Hrs%
0-1000 hrs,
0-12 mo 100.0% 100.0% 0.0% 0.0% 0.0% 0.0%
This is a 3.0-hour job
If there has been a previous repair, part age/hours will apply.
Retain a copy of the previous repair invoice in the dealer's
records for audit purposes, and specify repair date and machine
hours in the "Additional Comments" section of the warranty claim.
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Rework Procedure
Note: The hammer does not need to be removed from machine to perform the rework.
Image1.1.1
Step 1: Remove 355-5803 side shield from return side of hammer.
Image1.2.1
Step 2: Remove four 8C-3425 bolts and 7X-0510 washers from pressure control valve.
Image1.3.1
Step 3: Remove pressure control valve.
Image1.4.1
Image1.4.2
Step 4: Separate the cover from the pressure control valve.
Image1.5.1
Step 5: Replace 355-6568 Stem and 355-3758 Spring with 464-2961 Stem and 467-2506 Spring.
Step 8: Replace seals and backup seals.
Step 9: Reassemble in reverse order.
Image1.6.1