RADIATOR GP 5211050 - Caterpillar

This Containment 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 "PS20008 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.
Termination Date
February 28, 2002Problem
The 1379822 Material Sonic Sensors may fail on certain AP-650B, AP-1000B, AP-1050B, AP-1055B, and AP-1055B Asphalt Pavers; and on certain Barber-Greene BG-225C, BG-245C, BG-260C, BG-2455C, and BG-2455C Asphalt Pavers manufactured by Caterpillar if they are equipped with the optional 145-8519 Sonic Feeder Control. This sonic feeder control may have been factory installed or the asphalt paver may have been retrofitted with this option in the field.
Affected Product
Model & Identification Number
AP-650B (9DN1-Up)
AP-1000B (7HN1-Up)
AP-1050B (6ZN1-Up)
AP-1055B (ABB1-Up, 8BM1-Up)
BG-225C (5GN1-Up)
BG245C (4XN1-Up)
BG260C (8GN1-Up)
BG2455C (ACM1-Up, 6TN1-Up)
Parts Needed
1 - 1379822 SENSOR-SONIC - (Use as required replace only after a failure occurs)Action Required
See the attached procedure.
Service Claim Allowances
Parts Disposition
Return all failed sensors to:
Caterpillar Paving Products, Inc.
Attn: Bob Batty (1379822 Sensor)
9401 85th Avenue North
Brooklyn Park, Minnesota 55445
Attach.(1-Rework Procedure)Rework Procedure
137-9822 Sonic Material Height Sensor
The following is a procedure for tesitng 137-9822 material height sonic sensors for proper performance in the field.
1. Perform a visual inspection of the sonic sensor and the coil cable verifying the following statements.Equipment Required: 1 - 146-4080 Caterpillar mutli-meter or a 9U-7330 Fluke 87 multi-meter.1 - 7X-1708 Spoon Probe1 - 7X-1709 Spoon Probe
Refer to the ELECTRICAL SYSTEM SCHEMATIC, MEDIA NUMBER KENR3518, in the AP-1055B & BG-2455C ASPHALT PAVERS Service Manual.
Test Procedure
1. Perform a visual inspection of the sonic sensor and the coil cable verifying the following statements....The connections are clean and tight....The surface of the transducer is not damaged, scratched etc....The sensor is positioned properly in accordance to the material.2. Connect the digital multi-meter to the Feeder Control MPC-10 by placing the 7X-1708 spoon probe into pin 27 (936 WH) and placing the 7X-1709 spoon probe into common ground pin 39 (201 GR).3. Remove the left 137-9822 sonic sensor from the mounting bracket. Leaving the sensor connected to the coil cord and move the sensor to a level area 3 to 4 feet away from the machine.4. Make sure the parking brake is set and turn the key to the on position. Place the conveyor and auger control switches in the automatic position. Place the travel speed switch to the pave position and move the propel lever forward.5. Set the digital multi-meter to read duty cycle. For the Fluke 87 multi-meter set the dial to VDC and press the Hz button twice. For the 146-4080 multi-meter set the dial to DUTY, and confirm the range is positive by pressing the range button until an arrow appears on the right side of the screen. 6. Place the sonic sensor in a perpendicular position relative to the ground at a height of 8 inches from the bottom of the sensor to the ground. The digital multi-meter should provide a 5% duty cycle reading. Slowly raise the sensor in