ACCUMULATOR GP 2434398 - Caterpillar

face="Courier New">4807093 SEAL-LINER
16 4815615 PISTON AS
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 10% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.
ACTION REQUIRED
This program applies only if the Affected Product is equipped with a Reman Engine that is listed in Image 1.
This program provides support for replacing the Single Piece Cylinder System components with the Cuff Liner and Piston Components System, provided each of the following conditions is met.
1. Verify Oil Consumption exceeds limits listed in LEKQ7390 from the Electronic Media Center (emc.cat.com).
2. Verify Excessive Crankcase Blowby according to REHS7857. Some amount of blowby is generated by every engine and the amount of blowby typically increase with age as parts wear. The repairing dealer must use REHS7857 to determine if the engine is exhibiting sings of excessive blowby. If the Genset is currently "Out-of-Service" and placed in storage, the exception to Crankcase Blowby verification would be to provide photo documentation of the cylinder liner, either by cylinder liner bore scope or the removal of the cylinder head. Provide these photographs to Ben Swim - Customer Service Engineer at email address Swim_Ben_M
3. Verify that the engine is seeing an increase trend in Nitration and Oxidation in the last three SOS reports. A trend is defined as at least three consecutive samples with Nitration and Oxidation levels greater than the guidelines listed below.
- Nitration 12 UFM
- Oxidation 24 UFM
If all of these conditions are met, this Service Letter can be applied.
Note: DO NOT mix single piece forged steel pistons designed for the Single Piece Cylinder System with single piece forged steel pistons designed for the Cuffed Cylinder System. Rotating masses and system dynamics are different between the designs and are not compatible within the same engine.
Note: Connecting Rod and Piston Pins are highly reusable. For this reason, the Parts Needed tables do not list these parts. Refer to Image 2 for the ring compressor and installation tools required.
Refer to Disassembly and Assembly, UENR5578.
Note: Install High Flow Piston Spray Jets and an Oil Pump Pressure Regulator cover to increase the engine oil pressure. Because of this update, also increase the oil filter pressure differential warning alarm set point. Reset the Oil Filter Pressure Differential warning set point from 105KPA/15PSI to 138KPA/20PSI.
Image1
Image2
SERVICE CLAIM ALLOWANCES
Product smu/age whichever comes first Caterpillar Dealer Suggested Customer Suggested
Parts % Labor Hrs% Parts % Labor Hrs% Parts % Labor Hrs%
0-8000 hrs,
0-24 mo 100.0% 100.0% 0.0% 0.0% 0.0% 0.0%
8001-10000 hrs,
25-37 mo 75.0% 75.0% 0.0% 0.0% 25.0% 25.0%
10001-12000 hrs,
38-50 mo 50.0% 50.0% 0.0% 0.0% 50.0% 50.0%
12001-16000 hrs,
51-60 mo 25.0% 25.0% 0.0% 0.0% 75.0% 75.0%
This is a 95.0-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.
Since these Power Modules have been repowered by Remanufactured Engines, the product SMU would be the Reman