PRODUCT SUPPORT PROGRAM TO REWORK THE FIREWALL BRACKET WELDING ON CERTAIN 307E MINI HYDRAULIC EXCAVATORS Caterpillar

PRODUCT SUPPORT PROGRAM TO REWORK THE FIREWALL BRACKET WELDING ON CERTAIN 307E MINI HYDRAULIC EXCAVATORS

Usage:

TEBE0716-00

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23Dec2013

D-541

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*After Failure Only*	PRODUCT SUPPORT PROGRAM TO REWORK THE FIREWALL BRACKET WELDING ON CERTAIN 307E MINI HYDRAULIC EXCAVATORS
7262		PS52583

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NOTE:

This Program can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS52583" as the Part Number and "7755" as the Group Number. Use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.

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NOTE:

The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.

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TERMINATION DATE

31Dec2014

PROBLEM

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Insufficient fusion has been observed in the firewall bracket weld on certain 307E Mini Hydraulic Excavators. This can lead to a crack in the weld.

AFFECTED PRODUCT

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Model	Identification Number
307E	H1Y00280-00509, 511-591, 618-620

PARTS NEEDED

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No parts needed for this program

ACTION REQUIRED

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Refer to the attached Rework Procedure.

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SERVICE CLAIM ALLOWANCES

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Product smu/age whichever comes first	Caterpillar		Dealer Suggested		Customer Suggested
Product smu/age whichever comes first	Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
0-2500 hrs, 0-12 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

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NOTE: This is a 2.0-hour job

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PARTS DISPOSITION

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Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

Rework Procedure

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1. Park machine on level ground with the implements lowered.

Refer RENR9744, Disassembly and Assembly, "System Pressure - Release", in order to prepare the machine for rework.

2. Turn off the engine and put the ignition switch in the OFF position.

3. Turn off battery isolator switch. Refer to Image1.1.1.

Image1.1.1

4. Unbolt two firewall bracket bolts and the engine left door (cab side) hinge bolts.

5. Remove and safe keep the door properly. Refer to Image1.2.1.

Image1.2.1

6. Grind off the cracked weld and ensure it is free from oil, grease, paint, and dirt before re-welding. Refer to Image1.3.1.

Image1.3.1

7. Attach the welding machine ground cable onto the door striker as shown. Refer to Image1.4.1.

Image1.4.1

8. Protect the surrounding area using a fire-proof blanket with only the welding area exposed. Refer to Image1.5.1.

Image1.5.1

It is recommended to use 3.2mm E4303 electrode or equivalent and to maintain a 188 ampere electrical power for the weld repair work.

9. Perform a fillet weld for the full length of 87mm with a minimum 3mm weld leg size.

10. Remove weld slag and touch up the weld with a light grinding or a sanding after the welding.

11. Use Dye penetrant or the magnetic particle inspection for the weld. Repeat the above if the weld is unsatisfactory.

12. Touch up the weld and the affected area with primer and paint after the weld has cooled.

Note: The weld must be free from cracks, porosity, undercut, and incomplete fusion.

13. Reassemble the left engine door and the two firewall bracket bolts. Refer to Image1.6.1.