Screen Removal Bargman L-300 Door Handle brakes Satellite Fuel Tank Fire Extinguishers Roof Antenna Tech Talk Forum Shortcut Motor Oil Window Generators headlights batteries Radiator AC Unit Grab Handle Wiper Blades Wiper Blades Door Locks Door Locks Door Locks Door Locks Rims Front Shocks Rear Shocks Front Tires Oil Filter Steps Roof Vent Awning Propane Tank Mirror Info Clearance Lights Clearance Lights Clearance Lights Clearance Lights Clearance Lights Spartan Chassis Gillig Chassis Freightliner Chassis P-32 Chassis MCC Chassis
    Forums    Tech Talk    Generator won't produce steady ac
Go to...
Start A New Topic
Search
Notify
Tools
Reply To This Topic
  
Generator won't produce steady ac
 Login now/Join our community
 
Supporting Member of Barthmobile.com 6/12
Formally known as "Humbojb"
Picture of Jim and Tere
posted
Generator starts and runs fine. Turn on roof a/c, fan blows but compressor doesn't come on. Voltage at all ac outlets bounces around from 25volts to 118volts. Transfer switch working fine. AC outlets work fine when plugged into shore power as does the air conditioner. Circuit breaker inside coach is fine. Circuit breaker on generator's alternator section is not tripped. My guess? The alternator's capacitor/voltage regulator is shot. Could be the whole control board I guess. Or stator ,rotor. What do the rest of you think?

Jim (aka Hum)


Jim and TereJim and Tere

1985 Regal
29' Chevy 454 P32
8411 3172 29FP3B
Gear Vendor 6 Speed Tranny
 
Posts: 3776 | Location: madisonville tn usa | Member Since: 02-19-2005Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 7/17
Picture of Doorman
posted Hide Post
Brushes may be shot. What type of gen? I have a contact that works on them that might be of help. Tom bought his euro off him. He spent many hours on Tom's gen getting it running for his trip back to Texas. Will see if I can come up with his phone#.


1986 31' Regal -1976 Class C
454/T400 P30 -350/T400 G30
twin cntr beds - 21' rear bath
 
Posts: 933 | Location: Dayton, Ohio | Member Since: 09-27-2009Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 6/12
Formally known as "Humbojb"
Picture of Jim and Tere
posted Hide Post
It's an Onan Emerald I BGEF 4000

Jim


Jim and TereJim and Tere

1985 Regal
29' Chevy 454 P32
8411 3172 29FP3B
Gear Vendor 6 Speed Tranny
 
Posts: 3776 | Location: madisonville tn usa | Member Since: 02-19-2005Reply With QuoteReport This Post
Picture of L78steve
posted Hide Post
Is the engine RPM steady at 3600 RPM when you are getting those varying AC voltage readings?



1993 34 Regency WB
8.3 Cummins 300HP
 
Posts: 199 | Location: Hendersonville NC | Member Since: 02-02-2016Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 4/08
posted Hide Post
Onan uses a four pole alternator so engine runs 1800 RPM.


'92 Barth Breakaway - 30'
5.9 Cummins (6B) 300+ HP
2000 Allison
Front entrance
 
Posts: 1073 | Location: Minneapolis/Yuma | Member Since: 08-17-2006Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 6/12
Formally known as "Humbojb"
Picture of Jim and Tere
posted Hide Post
quote:
Originally posted by L78steve:
Is the engine RPM steady at 3600 RPM when you are getting those varying AC voltage readings?


As far as I know, it's running at 1800 RPMs but it doesn't have a tach on the generator.


Jim and TereJim and Tere

1985 Regal
29' Chevy 454 P32
8411 3172 29FP3B
Gear Vendor 6 Speed Tranny
 
Posts: 3776 | Location: madisonville tn usa | Member Since: 02-19-2005Reply With QuoteReport This Post
Picture of L78steve
posted Hide Post
2 pole or 4 pole the engine needs to be in tune and running steady. Otherwise frequency and voltage will be all over the place. Only other devise that can cause fluctuations is the voltage regulator.



1993 34 Regency WB
8.3 Cummins 300HP
 
Posts: 199 | Location: Hendersonville NC | Member Since: 02-02-2016Reply With QuoteReport This Post
  Powered by Social Strata  
 

    Forums    Tech Talk    Generator won't produce steady ac

This website is dedicated to the Barth Custom Coach, their owners and those who admire this American made, quality crafted, motor coach.
We are committed to the history, preservation and restoration of the Barth Custom Coach.