S e r v i c e B u l l e t i n # doc

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1 S e r v i c e B u l l e t i n # doc Clearlake Byron Lynden Page 1 of 11 FINAL ASSY/MODEL 330/334 MERGER Title: 330/334 CONTROL BOX DIODES Approval Initials Date Approval Initials Date Author MTL 10/6/2010 Director of Technical Service JRW 10/12/2010 Engineering Manager JEG 10/12/2010 Warranty Coordinator MWD 10/12/2010 V.P. Engineering GAM 10/11/2010 Territory Managers DA/KK 10/15/2010 Distribution Date Tracking Required Part Ordering External Yes By Service Location Internal No By Engineering Dealers 10/15/2010 By Territory Manager Other By Dealer Priority ( ) Coverage ( ) Urgent Update No Cost to Customer Customer Expense Mandatory Enhancement Labor Only Informational Other Parts Only Affected Serial Numbers or Model Years: ALL 330/334 Mergers with serial numbers starting with , , and Description (Issue) Under some circumstances the diodes in wires 301, 303, or 305 in the merger control box can momentarily draw too much amperage, causing a diode failure. See the Diode Troubleshooting section for descriptions of possible problems cause by failed diodes. If any machine within the standard 1-year warranty period has one these diodes fail, a claim may be submitted for the kit and 1 hour of labor to perform the repair listed below. Please reference the service bulletin on any repair claim. Solution: If any of the three diodes fails in the control box, all 3 should be replaced with 6amp diodes. Parts Required: Kit P/N (kit includes: diodes, heat shrink tube, & tie wraps) Tools Required: Screwdriver, Wire Cutters, Rosin Core Solder, Soldering Iron, Utility Knife, Heat Gun

2 Diode Troubleshooting: PROBLEM POSSIBLE CAUSE RIGHT CONVEYOR Conveyor will not go into float Conveyor will lower to the ground from the stowed position when the conveyor lower switch is momentarily pressed Diode in wire 303 failed open Diode in wire 303 failed closed CENTER CONVEYOR Conveyor will not go into float Conveyor will not lower Diode in wire 301 failed open Diode in wire 301 failed open LEFT CONVEYOR Conveyor will not go into float Conveyor will lower to the ground from the stowed position when the conveyor lower switch is momentarily pressed Diode in wire 305 failed open Diode in wire 305 failed closed

3 Procedure: 1. Disconnect power from the merger by unplugging the electrical harness from the back of the tractor. 2. Remove the cover from the control box. 3. Remove the (2) ¼ nuts inside the control box and the (4) ¼ nuts on the bottom of the control box shown. 4. Pull the electrical panel out of the control box. 5. Locate wire 305 and the diode going to relay K5. Cut the diode out, leaving the leg of the diode going into the relay in place.

4 6. Cut the rest of the diode out, leaving the soldered connection of wires 305. Remove the heat shrink tube from the leg of the old diode coming out of relay K5 and the soldered connection of wires Solder the new diode to the leg of the old diode coming out of relay K5. The diode must be installed with the grey stripe towards the relay. (Note: see the end of this service bulletin on tips for successful soldering)

5 8. Slide a 2 piece of clear heat shrink tube over wire 305. (Note: some tie wraps that bundle the wires together may need to be removed to gain enough room to slide the heat shrink tube over the wires.) 9. Solder wires 305 to the other end of the diode. 10. Slide the heat shrink over the diode and shrink it in place. If additional coverage is needed over this electrical connection, seal it with electrical tape.

6 11. Locate wire 303 and the diode going into relay K7. Cut the diode out, leaving the leg of the diode going into the relay in place. 12. Cut the rest of the diode out, leaving the soldered connection of wires 303. Remove the heat shrink tube from the leg of the old diode coming out of relay K7 and the soldered connection of wires 303.

7 13. Solder the new diode to the leg of the old diode coming out of relay K7. The diode must be installed with the grey stripe towards the relay. 14. Slide a 2 piece of clear heat shrink tube over wire 303. (Note: some tie wraps that bundle the wires together may need to be removed to gain enough room to slide the heat shrink tube over the wires.)

8 15. Solder wires 303 to the other end of the diode. 16. Slide the heat shrink over the diode and shrink it in place. If additional coverage is needed over this electrical connection, seal it with electrical tape.

9 17. Locate wire 301 and the diode going into relay K9. Cut the diode out, leaving the leg of the diode going into the relay in place. 18. Cut the rest of the diode out, leaving the soldered end of wire 301. Remove the heat shrink tube from the leg of the old diode coming out of relay K9 and wire Solder the new diode to the leg of the old diode coming out of relay K9. The diode must be installed with the grey stripe towards the relay.

10 20. Slide a 2 piece of clear heat shrink tube over wire 301 or the diode. (Note: some tie wraps that bundle the wires together may need to be removed to gain enough room to slide the heat shrink tube over the wires.) 21. Solder wire 301 to the other end of the diode. 22. Slide the heat shrink over the diode and soldered connection and shrink it in place. 23. Use the provided tie wraps to replace any that were removed during the installation of the diodes. 24. Reinstall the electrical panel in the control box and reinstall the (8) ¼ nuts. 25. Reinstall the cover on the electrical control box.

11 26. Reconnect the control cable for the merger to the tractor. 27. Start and run the merger operations to assure everything is operating properly. Tips for Successful Soldering All parts must be clean and free from dirt and grease Try to secure the work firmly Clean the tip of the hot soldering iron on a damp sponge Tin the iron tip with a small amount of solder Heat all parts of the joint with the iron for a second or so. Continue heating, then apply sufficient solder only, to form an adequate joint Remove and return the iron safely to its stand Do not move parts until the solder has cooled Soldering Problems Solder won t take grease or dirt present. Remove solder and clean up the parts. Or, material may not be suitable for soldering with lead/tin solder Joint is crystalline or grainy looking has been moved before being allowed to cool. Or, joint was not heated adequately too small an iron / too large a joint. Solder joint forms a spike probably overheated, burning away the flux