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Topic: Engine Alternator use: (Read 2061 times) previous topic - next topic

Re: Engine Alternator use:

Reply #75
Ok, more than 12, sure Start will work. (Requires RLA on 115V unit to be in range of 12/20 Amps)
Tim Fiedler    2025 LTV Unity MBL on Order
2000 Chevy Tracker 2 Door Convertible 4WD Now lifted 4.5"
1985 Citroen 2CV6 Charleston
Murphy Rebel on wheels with 175HP Titan
Cessna P337
1980 48' Westport MY (!/4 Share)


Re: Engine Alternator use:

Reply #77
Stump,
Nice pair of Kubota units, Nice, no limit $$$$, & 45' Prevost, Have seen one of his old units that the IRS sold, very smoked up & dull inside. Do not recall the make or year, but was about 10-12 yrs ago at bus event.

Re: Engine Alternator use:

Reply #78
Thanks Wyatt, I have looked at the mounts many times and as far as I can tell visually, they appear to be sound. As I said, it isn't horrible, just noticeable. I think there is something rattling in sympathy with the generator frequency which adds to it though. I want to try and source some air spring isolator mounts for it but haven't got any leads yet on how to spec them out, other than weight of the unit and the mounting height dimension. I want to be able to add or remove air to find the mounts acoustically satisfying solution. Also, I will separate the radiator mounting from the generator as others have done with the 8KW units.
Don

Pulled my 8kw gen. out for service yesterday
combination radiator & 3 cylinder on one frame, earlier U270 application. Noticed I had broken 3 out of the 4 radiator isolator mounts.
Most likely have been broke for some time, Really no movement because of the tight fit within the insulated generator box. Should think about separating the radiator from the Isuzu like others have done.

Small Isolator Mount by Power Tech | Power Technology Southeast Inc

Doug W.
96 36' U270 CSGI #4946
04 Toyota Tacoma 4x4
PNW

Re: Engine Alternator use:

Reply #79
The isuzu seems to have a lot worse vibration than the four cylinder kubotas. Ive seen two of them with a lot of broken mounts
Matt
95 U300, 78k miles
Cat 3176 Jake Brake, HD4060.

Re: Engine Alternator use:

Reply #80
The isuzu seems to have a lot worse vibration than the four cylinder kubotas. Ive seen two of them with a lot of broken mounts

I think the most severe vibration / shake happens during a cold start or shutdown.
Radiator isolator mounts are small and they just come apart, quarter inch stud pulls away from rubber.
Doug W.
96 36' U270 CSGI #4946
04 Toyota Tacoma 4x4
PNW

Re: Engine Alternator use:

Reply #81
I cranked up the RPM slightly to about 62-63hz no load and that helps some with the vibration on the izuzusususus. Relocated the radiator overlfow tank off the radiator too. Still shake...4cyl kubota is much nicer machine. I'd rather a honda inverter unit thoguh..super quiet and small.
1998 U270 34'

Re: Engine Alternator use:

Reply #82
Replacing generator mounts every decade (or sooner) is a good maintenance move. 
Rubber (like concrete) never stops curing.  At a certain point mounts may look acceptable
but are worthless just like an old tire..  pc
S/W Houston 95" U320C SE/40' 
Build #4778  Cummins M11
Repairs & Covered RV Parking (BAO)
PPL is close..

Re: Engine Alternator use:

Reply #83
Look at the mounts from the bottom. While they may look 100% from a normal top view, they may be shot when viewed from underneath.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Engine Alternator use:

Reply #84
Always make sure the hold down bolts for the slide tray are nice & tight.  If not, the commotion is greater.
Peter & Beth Martin
No Forrest? What have you done?
MC# 15890 until Dec 2016; FMCA #F329677
Cincinnati, OH