How to adjust air cooled diesel generator for perfect frequency

[@ShorrockPaul]

Mine is 230v and 50hz.. am running at 223v and 47.5hz..could i adjust it to 50hz doing the same you have done here.. ?

[@JoshKilen]

yes, this is meant to be a guide to get to what you need.

[@ShorrockPaul]

@JoshKilen thanks will give it a try. I am concerned that as it used to run at 50 hz and approx 3000 rpm (now is 2900 rpm) that adjusting the governor is just increasing fuel consumption when in fact something else is going on.. it has fresh oil new fuel and air filters and valve clearance checked ok.. so not sure why running slower than before.. possible fuel pump needs shimming or replacing ?

[@JoshKilen]

Sorry I didn't get back to you sooner, no notification. It depends on a lot a factors why there might be a small drop in rpms. for one is how many hours are on the unit? if there is a lot of hours, there is just normal wear in governor system. It might use a drop more for fuel after adjustment, personally I wouldn't worry about the fuel consumption a whole lot, I am more concerned about it turning the right speed for the electrical equipment. re-shimming doesn't affect the rpms, just the timing of the injector by a tiny bit. Another thing that cause rpm drop is the vibration caused by running, if the adjustment screws/bolts aren't tight enough to prevent them from moving. hope this help. there might be more at play, but these are the most simple things that could cause the rpm drop.

[@mickwolf1077]

@@ShorrockPaul the springs that tension the governing assembly change over time too and naturally require adjustment, altitude plays a role too.

[@ShorrockPaul]

@mickwolf1077 in this case altitude is not relevant as I haven't moved. Possible governor spring tension.. but it seems to have reduced speed over too short a time.. it has 1000 hrs on it. However turns out reg/rectifier wire was burned out.. ac side.. so am changing that out and see what develops.. will check stator output too (should be 30-40Vac)

[@onyangunga]

Thanks dude, Been tryna figure out what was causing my weird low idle and been cleaning injector and pump to no avail until I saw this. 😂 I'm a mechanic too 😂😂. Shame

[@JoshKilen]

glad I cold help.

[@tomdederen5893]

its not the best video but the first one that dit make my understand how to do it. thank you for making this video. really helpful.

[@JoshKilen]

no problem, glad it helped, why is it not the best video? anything I need to explain or clear up?

[@brazoon1]

@@JoshKilen Forget this guy, the video was fine. People are weird. He states it's the first video that helped him actually understand this yet somehow it's still not good enough?

[@JoshKilen]

true.

[@proutsos]

Thank you, I had an over frequency error and shut down on a nearly identical machine. Its 50hz in EU. The previous owner replaced the "throttle" assembly and it makes sense to be tightened at a random spot.

[@JoshKilen]

Glad I could help you fix your machine.

[@thomasleerriem6872]

The "SILENT" sticker is funny...

[@JoshKilen]

I know right.

[@NancyEdet-tx5kf]

What can cause over heat on this engine

[@JoshKilen]

overloading of the engine, blocked cooling air, both on the intake under the shroud or on the exit path of the cooling air, or missing cooling fins on the flywheel.

[@ShorrockPaul]

Do ypu have to loosen both bolts to adjust or just the slotted one ?

[@JoshKilen]

I am not sure. I also no longer have this generator. I think the throttle plate will be easier to adjust if both are loosed.

[@alanshiels4868]

Good vid I'll try this with mine once done is there any reason to adjust the avr to iits a 16 hp 10kva open frame diesel generator seames to be lagging at about 6500 load

[@JoshKilen]

glad it helped.

[@alanshiels4868]

Any reason to adjust the avr on it ?

[@JoshKilen]

to get perfect voltage. I should of put a disclaimer in it for people with 50Hz machines.

[@tomdederen5893]

i think your question have not much to do with this video, AVR is for voltage and this video is about speed or Hz. No there is no need to do that, only when the voltage is a little outside the rang​e you can consider adjusting your AVR, but can be a different defect as wel you need to check that furst. @@alanshiels4868

[@paridecontini9773]

What temperature does the engine reach on the cylinder head during normal operation? Is mine reaching 120 degrees normal? What temperature does yours reach?

[@JoshKilen]

I can't really measure it since its buried in the generator housing. is that 120 degrees F or C?

[@paridecontini9773]

@@JoshKilen 120c

[@JoshKilen]

@@paridecontini9773 sorry it took so long to get back to you, no notification. it depend on the load and the ambient air temperature. what is the rated load of your machine and how much load did you have on it?

[@paridecontini9773]

@@JoshKilen C

[@JoshKilen]

@paridecontini9773 what do you mean by C?

[@brazoon1]

Hi, so what is more important, voltage or hertz? I have a 1300 watt geny and I set the voltage while under 750 watt load to 120 volts. Is that good enough or should I really get a Hz tester? Is it even possible for the Volts and Hz to be that far from one another? Cheers!

[@JoshKilen]

it really depends, but Hz would be more important for loads. the reason why I say that is motors and electronics are designed to work at 60hz or as close to it. if they get to high or low of Hz it can cause motors to not run at there correct rpms, plus overheat and for electronic loads it can cause them to be come grumpy. my generator has it voltage controlled by a capacitor, so the voltage is set to what it is with rpms. in that case set the Hz, and the voltage will be good enough. If the voltage is not within 110-120v then the capacitor needs to be changed. but some generators come with whats called an AVR or automatic voltage regulator, which does a much better job getting the voltage where it needs to be. with those set the Hz and if the voltage is not within 110-120 then you can adjust the AVR to make it right. As for getting a Hz reading, you can buy the P3 international "Kill-A-Watt" meter and it will be just fine. May I ask what are you running that is 750 watts and what type of generator?

[@brazoon1]

@@JoshKilen Hey thanks for the reply! It's just a back up generator that I paid 60$ for. (United Power GG1300). It had a blown capacitor which I recently replaced. But it seemed like the previous owner had messed around with the idle and governor before giving up on it so they needed to be reset. I went 120v at idle then 120v under load and was using a space heater on low setting.

[@JoshKilen]

ok, got love other people's problems, lol. nice job sorting it out. do you plan on just using that space heater when you use it or electronic loads like tv's or laptops?

[@brazoon1]

@@JoshKilen I plan on trying to sell it to a neighbor so they can power their furnace in the event of a winter outage. Not looking to make a profit just recover costs. But I want to make sure I'm not handing off something that could damage whatever they choose to run with it either. I've already got two invertor generators but if it doesn't sell (for 70$) then I'll keep it as a back up and also be sad that my neighbors are dumb. lol

[@JoshKilen]

it wouldn't hurt to check the Hz.

[@gilbertperezperez]

Thank you

[@JoshKilen]

no problem.

[@potrohu]

I think better is to adjust without any load, just adding some extra Hz, 1 or 1,5 Hz

[@JoshKilen]

no its better to adjust while under load, that way you aren't guess what it will be at a giving load.

[@maadsalemislim]

these chinese generators are very sensitive.not to exceed 60% of its power.

[@JoshKilen]

I sorry to say but a diesel generator needs to run between 60% and 75% of its rated load to run most efficiently and prevent wetstacking.

[@herewegoagain4041]

No! The reason u cant exceed 60% of the labeled power of these chinese gens. Is because the pamplet rating is the actual nominal watt out put. I have a pqde6500 diesel gen. It says run at 75%. Well looking at stator. There is a label that says "kt4.5-60hz". So there is the reason for the manual suggesting 75% of advertized load.

[@JoshKilen]

@@herewegoagain4041 I am sorry to say but those numbers on the stator means nothing especially when is comes to chineze part numbers. and the pamplets are just generic, and mean nothing when it comes to you and your machine. also my 60-75% of the rated load is a run of thumb when it comes to each machine. the rated load is different for each machine, the rated load is what the generator can supply at 100% duty cycle without issues. I go by what is labeled on the generator and not the pamplet.