The Slope Sensor Needs To Be Inspected And The Grade Control Boxes Need To Be Reworked To Configuration 3.9 On Certain AP-650B, AP-1000B, AP1050B, And AP-1055B Asphalt Pavers; And On Certain Barber-Greene BG-225C, BG-245C, BG-260C, And BG-2455C Aspha Caterpillar

The Slope Sensor Needs To Be Inspected And The Grade Control Boxes Need To Be Reworked To Configuration 3.9 On Certain AP-650B, AP-1000B, AP1050B, And AP-1055B Asphalt Pavers; And On Certain Barber-Greene BG-225C, BG-245C, BG-260C, And BG-2455C Aspha

Usage:

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Caterpillar: Confidential Yellow

NOTE: This Program must be administered as soon as possible. When reporting the repair, use "PI3215" 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 "PI3215" 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

June 30, 1999

Termination Date

December 31, 1999

Problem

Group 1

The wrong time constants may have inadvertently been loaded into the slope control box during manufacture of the Topcon Slope Control used on certain AP-650B, AP-1000B and AP-1055B Asphalt Pavers; and on certain Barber-Greene BG-225C, BG-260C, and BG2455C Asphalt Pavers manufactured by Caterpillar. An indication of wrong time constants can cause hunting of the slope tow point cylinder. Group 1 also needs rework of the grade control.

Group 2

The 1082398 Topcon Control Boxes used on certain AP-650B, AP-1000B, AP-1050B, and AP-1055B Asphalt Pavers; and on certain Barber-Greene BG-225C, BG-245C, BG-260C, and BG2455C Asphalt Pavers manufactured by Caterpillar may have the ramping and deadband turned off.

Affected Product
Model & Identification Number

Group 1

AP-650B (9DN320, 9DN328)

AP-1000B (7HN173, 7HN181, 7HN184, 7HN193, 7HN195, 7HN198, 7HN215)

AP-1055B (8BM268, 8BM285-286, 8BM281, 8BM289, 8BM291, 8BM293, 8BM302, 8BM312, 8BM320, 8BM324, 8BM334, 8BM336)

BG-225C (5GN456, 5GN461)

BG-260C (8GN526-527, 8GN531)

BG-2455C (6TN135-136)

Group 2

AP-650B (9DN341, 9DN354, 9DN359)

AP-1000B (7HN203, 7HN205, 7HN207, 7HN208, 7HN215)

AP-1050B (6ZN145, 6ZN136, 6ZN157, 6ZN146)

AP-1055B (8BM249, 8BM351, 8BM362, 8BM364, 8BM365, , 8BM132, 8BM129, 8BM138, 8BM162, 8BM175, 8BM153, 8BM161, 8BM187, 8BM207, 8BM202, 8BM200, 8BM205, 8BM163, 8BM195, 8BM213, 8BM219, 8BM223, 8BM239, 8BM240, 8BM251, 8BM313)

BG-225C (5GN464)

BG-245C (4XN98, 4XN108, 4XN110, 4XN115)

BG-2455C (6TN117, 6TN129, 6TN138)

Parts Needed

Not Applicable.

Action Required

See the attached procedure.

Owner Notification

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

Service Claim Allowances

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

Group 1 Affected Product

Suspect slope control boxes include serial numbers 2012-2031 and 2068-2467. The serial number is located on the side of the slope box. An indication of wrong time constants can cause hunting of the slope tow point cylinder.

Suspect serial numbers can be checked using the following test procedure.

1. Install the control boxes and set the screed on the ground.

2. Turn the ignition switch on and select the slope position of the control system and then select survey.

3. With the park brake applied start the engine and increase the engine rpm to maximum.

4. Turn the screed vibratory switch on the operators station and the screed console to the on position.

5. Speed dial at one half, select pave position and move the propel lever forward slowly.

6. Observe the slope readout, if it is fluctuating 2-3% the slope time constants may be set improperly.

7. If the slope readout is only fluctuating .1 to .2% the slope box is operating properly.

Contact your local Topcon Dealer for repairs if the control system was purchased from Topcon.

If the system was purchased from Caterpillar, contact the Caterpillar Paving Products Paving Products Support Group at 612-493-1379 for further information.

NOTE: The slope sensor supplied by Caterpillar Paving Products will be a remanufactured control.

Group 2 Affected Product

Rework of the Grade Control only.

Contact Caterpillar Paving Products Product Support 612-493-1379 with the machine serial number and CPPI will supply the parts for rework.

NOTE: Rework the control box in a dust, moisture, and static free environment. Remove all jewelry from your hands. Use of a ground strap is highly recommended.

1. Remove the controls from the machine or the carrying case.

2. Remove two screws from the front face panel and the two screws on the rear of the control box. See Illustration 1.

Illustration (1)

3. Carefully separate the printed circuit boards from the control housing and carefully cut the tie wrap holding the e-prom chip in its base. See Illustration 2.

Illustration (2)