EDGE-CUTTING 6W4598 - Caterpillar

Caterpillar: Confidential Yellow
SERVICE LETTER SUPPLEMENT FOR FEBRUARY 25, 1989 SL - PS4277 - PSP FOR MAIN POWER REPLAY FAILURES DUE TO CONTACT CON TAMINATION ON CERTAIN 416, 426, 428, 436 BACKHOE LOADERS - MAILED US AND CANADA, CACO, COFA, CFEL, COSA
  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.
U-52 A-36 AU-34 E-28 O-38 Some information needs to be changed in the Service Letter which follows: February 25, 1989 - PS4277; Product Support Program For Main Power Relay Failures Due To Contact Contamination On Certain 416, 426, 428, And 436 Backhoe Loaders Under the heading Parts Needed, make the following changes. Remove: 1 - 9R6800 Service Kit Add: 4 - 3S2093 Tie Wrap 3 - 8S4626 Splice 2 - 8T0334 Washer 1 - 7X6402 Switch Assembly 1 - 9X0194 Terminal Assembly Under the heading Action Required, change the procedure for the Affected Product to read as follows. Follow the procedure in Special Instruction SEHS9002, Service Replacement Of Main Power Relay For Backhoe Loaders, and replace the 6T2035 Switch Assembly (Main Power Relay) with the parts listed above.