Buy 146403-9520 ZEXEL 9 461 627 053 BOSCH HYDRAULIC HEAD 9461627053 1464039520

ACTION REQUIRED
Replace cylinder head, reusing cylinder head bolts and washers after performing visual inspection. Reinstall injector, injector return line, and quill tube with new injector seals, injector return line seals, and quill tube bolts. Reference KENR6052 for removal and installation procedures and for troubleshooting guidance on diagnosing a leaking injector sleeve refer to the info below.
If the source of the sodium cannot be isolated via other normal testing of individual components (water pumps, oil coolers, etc.) then complete the following procedure:
1. Shut down the engine and allow system to cool.
2. Flip the ground level shutdown switch on the truck front bumper and leave the switch engaged. This action disables the fuel injection.
3. Verify that the engine will crank but the engine does NOT start.
4. Pull the last exhaust manifold from each bank of the engine.
5. Pressurize the truck cooling system, refer to Testing and Adjusting, KENR5397 for additional information.
6. Hold pressure on the cooling system for no more than 10 minutes for the first test. If the leak is bad, holding the pressure too long could risk hydraulic lock.
7. While cranking the engine, shine a light up into the exhaust manifolds and look for cylinders that are puffing steam and white smoke. Refer to Image 1.
8. Verify any leaks by pulling the exhaust thermocouple port from the exhaust runner on that cylinder. Check for signs of moisture/steaming in that exhaust runner.
9. Repair any leaking injector sleeve by replacing the head.
Image1
SERVICE CLAIM ALLOWANCES
Product smu/age whichever comes first Caterpillar Dealer Suggested Customer Suggested
Parts % Labor Hrs% Parts % Labor Hrs% Parts % Labor Hrs%
0-9000 hrs,
0-24 mo 100.0% 100.0% 0.0% 0.0% 0.0% 0.0%
9001-18000 hrs,
25-48 mo 33.0% 50.0% 0.0% 0.0% 50.0% 50.0%
This is a 8.0-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.
The 8 hour labor allowance consists of:
4 hours troubleshooting max per repair
4 hours repair time
If more than one cylinder has failed, an additional 4 hours repair time per additional cylinder is allowed. Repairing up to 4 cylinders (793F) and 6 cylinders (797B, 797F) in chassis is allowed. No additional troubleshooting time is allowed.
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.