PRODUCT SUPPORT PROGRAM FOR REPLACING THE SWING GEAR THAT MAY FAIL ON CERTAIN 345B AND 345B L EXCAVATORS

Usage:

SEBE8545

October 13, 2003
D-214

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*After failure only* *Parts stock action needed*	PRODUCT SUPPORT PROGRAM FOR REPLACING THE SWING GEAR THAT MAY FAIL ON CERTAIN 345B AND 345B L EXCAVATORS
7063 5459		PS50682

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 "PS50682" 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.

NOTE: Although this Program is to be administered as described above on the Affected Product, parts should be removed from parts stock as soon as possible.

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.

TERMINATION DATE

October 31, 2005

PROBLEM

Swing gear may need to be replaced on certain 345B and 345B L Excavators. The swing gear may fail due to high teeth contact stress between gear and swing drive pinion. A new pinion has been developed with an improved tooth profile to increase service life of the swing gear and pinion.

AFFECTED PRODUCT

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Model	Identification Number
345B	6XS214-217
345B L	5WS180-429

PARTS NEEDED

2 - 4D7956 Race
2 - 4L0734 Roller Assembly
24 - 8T4167 Washer - Hard
2 - 6V3532 Bolt
24 - 7X2576 Bolt
1 - 7Y1095 Dowel
60 - 7Y1507 Spacer
2 - 7Y1758 Spacer
10 - 7Y1759 Shim
4 - 7Y1760 Shim
2 - 7Y1761 Shim
2 - 7Y1762 Shim
2 - 7Y1765 Washer - Lock
4 - 7Y1766 Seal - Lip Type
2 - 7Y1772 Cage
45 - 930020 Spacer
2 - 951022 Bearing - Roll
2 - 964755 Pin
2 - 964837 Pin - Spring
60 - 1121532 Bolt - Hex Head
2 - 1141406 Retainer
45 - 1416373 Bolt - Hex Head
1 - 1362969 Gear Group - Bearing
2 - 2276056 Shaft - Pinion

ACTION REQUIRED

***** Parts Stock *****

Remove all 1863455 Pinion Shafts and 1362969 Swing Bearings from parts stock.

***** Affected Product *****

See the attached Rework Procedure.

SERVICE CLAIM ALLOWANCES

***** Parts Stock *****

Submit one claim for all 1863455 Pinion Shafts and 1362969 Swing Bearings that are removed from parts stock.

***** Affected Product *****

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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
0-6000 / 0-36 months	100%	90	0	0	0	0
6001-8000 / 37-48 months	66 2/3%	60	0	0	25%	30
8001-10000 / 49-60 months	33 1/3%	30	0	0	50%	60
NOTE: This is a 90?hour job.

PARTS DISPOSITION

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

Attach. (1-Rework Procedure)

Rework Procedure

In the event of a swing gear failure upgrade to improved parts. Refer to Service Manual - Disassembly and Assembly, Sections "Swing Drives (Right and Left)" and "Swing Gear and Bearing". 1. Replace former 1863455 Pinion Shafts to the new 2276056 Pinion Shafts ones for both left hand and right hand swing drive groups. The following parts are required to replace the shaft pinion: 2 - 4D7956 Race
2 - 4L0734 Roller Assembly
2 - 6V3532 Bolt
2 - 7Y1765 Washer
2 - 7Y1758 Spacer
2 - 1863455 Shaft
2 - 7Y1772 Cage
4 - 7Y1766 Seal
2 - 0964837 Pin
2 - 1141406 Retainer
10 - 7Y1759 Shim
4 - 7Y1760 Shim
2 - 7Y1761 Shim
2 - 7Y1762 Shim
24 - 7X2576 Bolt
24 - 8T4167 Washer
2 - 0964755 Pin NOTE: Clean all grease, oil and dust, etc, from mating surface of swing drive groups before installation.
Clean all threads of swing drive retaining bolts.
Replace all swing drive retaining bolts and spacers. 2. Replace former 1362969 Swing Bearing with new 2003645 Swing Bearing. The following parts will be required to replace the swing bearing: 60 - 1121532 Bolt (for inner race of swing gear bearing)
60 - 7Y1507 Spacer (for inner race of swing gear bearing)
45 - 1416373 Bolt (for outer race of swing gear bearing)
45 - 0930020 Spacer (for outer race of swing gear bearing
1 - 7Y1095 Dowel NOTE: Clean all mating surfaces of swing gear bearing before installation.
Clean all threads of swing gear retaining bolts.
Replace all swing gear retaining bolts and spacers.

Adjust right swing motor relief, (high pressure side), from 34,000 +/- 740 kPa to 29,400 +/- 980 kPa based on the Test and Adjust section of the service manual. Leave the left swing motor relief setting at 29,400 +/- 980 kPa.