803a sustained load in high heat.

[Gameboynws]

What is a safe max sustained load in hot ambient weather climate?

I have mine powering 3 RV’s ( AC’s running) at the Kentucky State fair. So far my max load is about 85%. Coolant temp about 190-200° still 40psi oil pressure (full syn 5w40).

right know it’s 85° ambient temp, but the high temp next week is forecasted to be about 95-100°. I do have 2 high velocity fans running to help with removing excess heat from the inside my trailer.

 

[WWRD99]

Don't rely on those gauges...get a temp gun and check the thermostat housing...they aren't very accurate...it has over temp cut off if I remember right so if they do actually get to hot they'll shut down.

Sent from my SM-S906U using Tapatalk

 

[kloppk]

It's designed to run continuously, under full load in 120F air temperatures.

 

[DieselAddict]

Your max load is actually around 105%. The green line is 100% under most conditions. One of the idiosyncrasies of these sets.

You should be fine. They are tested to run in desert conditions.

 

[Guyfang]

Normal Operating Temperature 170-200 °F (77-93 °C)

Trip Temperature 225 °F ±5 °F (107 °C ±3 °C)

A coolant high temperature switch provides automatic shut down in the event that coolant temperature exceeds
225 ±5 °F (107 ±3 °C) .

Do not leave any door open, other then the control panel door. The set is supposed top run, with all doors closed to properly cool itself.

The Operators TM is you friend.

 

[Gameboynws]

Don't rely on those gauges...get a temp gun and check the thermostat housing...they aren't very accurate...it has over temp cut off if I remember right so if they do actually get to hot they'll shut down.

Sent from my SM-S906U using Tapatalk

If I can make it off the fairgrounds during normal business hours, there is an O’Reillys close by to buy an infrared temp gun. Didn’t think to bring my other one from home.

 

[WWRD99]

If I can make it off the fairgrounds during normal business hours, there is an O’Reillys close by to buy an infrared temp gun. Didn’t think to bring my other one from home.

Good to have one with you just in case...the other people on this thread are way more qualified than I am on these too. So whatever they say works.

Sent from my SM-S906U using Tapatalk

 

[Digger556]

There is a data plate that lists temps and altitude ratings for these machines. On #2 diesel, 10kW @ 120 degrees at sea level,

 

[Gameboynws]

To give an update / ending to my story.


generator ran for 270 indicated hours and used approx 200 gallons of diesel (0.75g/hr). We were primitive camping at the Kentucky State Fair, (carnies get the actual camper spots). Two 50 amp campers & one 30amp camper was plugged into the generator, 5 AC’s in use. Power consumption during the day varied between 75-90%, pending on ambient temp.
According to my o’riely’s non contact temp gun the oil filter’s max temp was 205-207°. I tried to measure at the water thermostat housing, but couldn’t get consistent results. 7 of the 12 days the high daily temp was over 90°+, and one day maxed at 100°. The low temp never went below 70°.

The good old mep803a IS worth is wait in gold as far as I’m concerned. 5 smaller gen sets died & one was stollen.

 

[Digger556]

Nice report.

Any more detail on the smaller gens that died? Did they belong to people in your group? Were they 3600 rpm open frame generators? How did they die?

 

[Gameboynws]

Nice report.

Any more detail on the smaller gens that died? Did they belong to people in your group? Were they 3600 rpm open frame generators? How did they die?

3 open frame portable & 2 internal Cummins/onan 4 & 5.5kw. All gasoline powered & 3600 rpm’s. My honest guess is that the carbon brushes failed. Engines would run but not produce any power.

I personally had to have my internal Cummins/onan 5.5kw gas generator’s brushes replaced after 1,300 engine hours. I also had two portable gen sets die of the same reason. My family has been staying in a camper at the Kentucky state fair every year since 2015.

 

[Digger556]

Good update

 

[DieselAddict]

We went through 2 open frame generators here at home during an ice storm that took out power for about 10 days. Engines failed on both. Both brand new.

I've not had one of the military units fail mechanically. I've had them spring fuel leaks but thats the worst that has happened.

One of the 802s I adopted out earlier this year has been run over 800 hrs since they picked it up. They called me out for what they thought was an engine failure because it ran so bad and was smoking like crazy but it turned out to be a loose fastener on a injection pump. Retorque a nut and back in business.

 

[WWRD99]

To give an update / ending to my story.


generator ran for 270 indicated hours and used approx 200 gallons of diesel (0.75g/hr). We were primitive camping at the Kentucky State Fair, (carnies get the actual camper spots). Two 50 amp campers & one 30amp camper was plugged into the generator, 5 AC’s in use. Power consumption during the day varied between 75-90%, pending on ambient temp.
According to my o’riely’s non contact temp gun the oil filter’s max temp was 205-207°. I tried to measure at the water thermostat housing, but couldn’t get consistent results. 7 of the 12 days the high daily temp was over 90°+, and one day maxed at 100°. The low temp never went below 70°.

The good old mep803a IS worth is wait in gold as far as I’m concerned. 5 smaller gen sets died & one was stollen.

Glad it worked out great!! Sounds like a fun time!

Sent from my SM-S906U using Tapatalk

 

[cbisson]

To give an update / ending to my story.


We were primitive camping

The good old mep803a IS worth is wait in gold as far as I’m concerned. 5 smaller gen sets died & one was stollen.

"Primitive camping" with a 10kw generator?!?

 

[Digger556]

I thought about those numbers and realized what a tremendous amount of power you generated.

At those load levels, 200 gallons burned would have generated 1700-1800 kWh of electricity in ~11 days of runtime. That is over 2 months worth of electricity for an average house in my area!

 

[DieselAddict]

Yea, RVs are horribly inefficient for heating and cooling. I lived full time in a 35' rig while my house was being built and the power consumption of the RV in summer rivaled my 1650 sq/ft house!

 

[2Pbfeet]

Yea, RVs are horribly inefficient for heating and cooling. I lived full time in a 35' rig while my house was being built and the power consumption of the RV in summer rivaled my 1650 sq/ft house!

I agree. Most RVs are lucky to have 2" of insulation on them.