The Air Conditioner Expansion Valve Assembly May Need To Be Changed On Certain 12G, 14G, 16G, 120G, 130G And 140G Motorgraders Caterpillar

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.

NOTE: This Program must be administered as soon as possible. When reporting the repair, use "PI3670" as the Part Number, "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T " as the SIMS Description Code. Exception: If the repair is done after failure, use "PI3670" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and " Z" as the SIMS Description Code.

Completion Date

Termination Date

Problem

The air conditioner expansion valve assembly on certain 12G, 14G, 16G, 120G, 130G and 140G Motor Graders may need to be changed. These machines are equipped with R-134A refrigerant but may have been assembled with a an expansion valve assembly for use with R-12 refrigerant.

Affected Product
Model & Identification Number

12G (61M15368, 61M15370-15371, 61M15380-15381, 61M15383, 61M15392-15394)

14G (96U9077, 96U9094)

16G (93U3516)

120G (87V9732, 87V9733-9734, 87V9742-9744, 87V9746)

130G (74V2604)

140G (72V15940, 72V15942, 72V15945-15946, 72V15950, 72V15953-15954, 72V15956-15957, 72V15960, 72V15962-15964, 72V15970, 72V15972-15973, 72V15975-15985, 72V15990, 72V15993-15995, 72V15997-15998, 72V16000-16002, 72V16005, 72V16009, 72V16016)

Parts Needed

Dealers will need to order parts for this Program.

1- 3E9343 Valve Assembly

Action Required

See attached rework procedure.

Owner Notification

U.S. and Canadian owners will receive the attached Owner Notification.

Service Claim Allowances

Inspection Only

NOTE: This is a .5 hour job.

Inspection And Replacement Of Expansion Valve

NOTE: This is a 4.0 hour job.

NOTE: U.S. and Canadian Dealers Only - This Program does not qualify for a Type 2 SIMS Report.

Parts Disposition

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

NOTE: MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

Attach.

(1-Owner Notification)

(2-Rework Procedure)

Copy Of Owner Notification For U.S. And Canadian Owners

Rework Procedure

Inspection Only

Inspect the machine to determine if it needs to have a new expansion valve installed.

1. Remove the air conditioner/heater control knobs.

2. Remove the cover.

3. If the expansion valve has a blue sticker with "R134A" on it, the valve does not need to be replaced. Install the cover and control knobs.

4. If the expansion valve does not have a blue sticker with "R134A" on it, the valve needs to be replaced with a new 3E9343 Valve Assembly.

Replacement Of Expansion Valve

If inspection reveals the machine needs to have a new 3E9343Valve Assembly installed:

1. Evacuate the air conditioning system according to the procedures in Service Manual form number SENR5664.

NOTE: Observe all regulations concerning recovery and recycling of refrigerant.

2. Disconnect the existing 2G0401 Valve Assembly. As soon as the expansion valve is disconnected, plug the mating parts quickly to avoid entry of air and moisture. This will eliminate the need to replace the dryer.

3. Install the new 3E9343 Valve Assembly.

4. Recharge the air conditioning system using the refrigerant recovered during Step 1. Complete the recharging process using additional refrigerant, if necessary.