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Ample Power Alt and Next Step Reg

PostPosted: Fri Jul 25, 2014 5:31 am
by BarbRick
Units are ~10 yrs old

Alt is Max Amp Power Model PT 59, serial 144, volts 12, Amps 160-147, reg is AmplePower "next 12 p" serial n 13703.

Alt output drops to 0 when Cat diesel engine reaches operating temp. Tach also drops out.

Have already ordered from Ample Power: 1 new alt model 4059-S per Ruth Ishihara, 1 rebuild kit for existing alt , 1 new regulator.

Am on cruise now and alt not working and using a back-up source to keep batteries charged.

Can you suggest diagnostics to pinpoint the problem?

Re: Ample Power Alt and Next Step Reg

PostPosted: Fri Jul 25, 2014 10:45 am
by Coulomb
Are the LEDs on the regulator active when the alternator drops out. Maybe the regulator is getting turned off.

What is the battery voltage.

Please refer to the troubleshooting guide at: http://www.amplepower.com/trouble/index.html