PRODUCT SUPPORT PROGRAM FOR INSTALLING A LATCHING AIR FILTER RESTRICTION WARNING SWITCH ON CERTAIN 422F AND 434F BACKHOE LOADERS (6 MONTH SPECIAL EXTENSION) Caterpillar

PRODUCT SUPPORT PROGRAM FOR INSTALLING A LATCHING AIR FILTER RESTRICTION WARNING SWITCH ON CERTAIN 422F AND 434F BACKHOE LOADERS (6 MONTH SPECIAL EXTENSION)

Usage:

TEBE4470-00

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23Mar2016

O-126

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Before/After	PRODUCT SUPPORT PROGRAM FOR INSTALLING A LATCHING AIR FILTER RESTRICTION WARNING SWITCH ON CERTAIN 422F AND 434F BACKHOE LOADERS (6 MONTH SPECIAL EXTENSION)
1054 1051 1408		PS45027

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NOTE:

Caterpillar’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to Caterpillar.

NOTE:

This Program must be administered either before or after failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS45027" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and "T" as the SIMS Description code. If administered after failure, use "96" as the Warranty Claim Description Code, and "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

30Sep2016

PROBLEM

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The air filter restriction warning lamp may not operate properly on certain 422F and 434F Backhoe Loaders. If the air filter is clogged, at high engine speeds, the lamp on the monitoring system will illuminate. But, if the engine speed is lowered, the lamp may turn off due to the lower depression created by the engine. This results in the filters not being cleaned until the operator actually sees the lamp is illuminated, or the filters are heavily clogged. The switch used is not a latching switch, and the monitoring system does not electronically latch the lamp.

AFFECTED PRODUCT

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Model	Identification Number
422F	LRH00503, 540, 556, 578, 636, 647, 762, 769-770, 1459-1460, 1465, 1469, 1472, 1631-1633, 1635, 1637, 1640, 1647, 1649, 1923, 2159, 2176, 2181
434F	LDH00159, 161, 212-213, 215, 235, 549-550, 552-553, 685, 871

PARTS NEEDED

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Qty	Part Number	Description
2	8T8729	PIN-CONNECTOR
2	8T8730	SOCKET-CONNECTOR
1	1028802	RECEPTACLE KIT
1	1552270	PLUG KIT-CONN
1	2466560	WIRE AS.
1	3180302	INDICATOR AS.
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 15% 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

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A mechanically latching type switch may be retro-fitted to the air cleaner. Once the filter is clogged, the lamp will stay on until the operator manually pushes the reset button on the back of the new switch.

The new 318-0302 Indicator Assembly Switch is a direct replacement for the original 276-4836 Switch located on the side of the air filter housing.

1. Fabricate a jumper harness using a 246-6560 Wire Assembly in order to fit the replacement indicator assembly switch. The harness will need to be shortened in length to suit (approximately 200mm).

2. Cut the original connector from the engine harness, use the male and female connectors in the parts needed below, connect the original harness to the jumper harness.

3. Connect the jumper harness to the new switch located on the air cleaner housing.

When the air filter becomes clogged, the warning lamp will stay illuminated. Once the filters are cleaned the reset button on the end of the new switch must be pressed to re-set the warning lamp. Refer to the machine Operation and Maintenance Manual.

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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%
0-3000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%
3001-5000 hrs, 25-48 mo	50.0%	50.0%	50.0%	50.0%	0.0%	0.0%