Fuse Board Blew N45ZR c264 - Maintenance & Troubleshooting discussion in Forkliftaction's forums

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Fuse Board Blew N45ZR c264

Hyster N45ZR-16.5

Original problem was a blown fuse board. Replaced it and the line contactor would once again pull in and travel and lift were OK. Then found bad aux motor. (diagnosed by: 36 volts at motor with no CAN bus problem) I'm replacing the motor Friday but I was wondering -- Is there any way the Aux motor could have smoked the fuse board? I have the book on this one but it doesn't seem to include a wiring diagram. All I see to the motor are the power cables and 2 CAN wires.

Posted 27 Apr 2022 07:29
By lumberjack
joined 27 Jul'07 - 183 messages
Maryland, United States

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Well, I replaced the Aux motor and fuse board and all operations seem to be ok. An autopsy on the motor showed burned up mosfets. Which caused an intermittent ground on the neg side. I'm guessing the ground either caused the fuse board failure or it was just a complete coincidence that they both burned up at the same time.

Posted 6 May 2022 07:43
By lumberjack
joined 27 Jul'07 - 183 messages
Maryland, United States

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Lumber

Usually the regulator fails in the circuit board and cause the problem. Low battery voltage and high current draw is the most common cause. Good Luck

Posted 6 May 2022 05:42
By garland_m
joined 16 Oct'09 - 212 messages
Virginia, United States

Work Hard and Fish Long

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