Fantastic explanation of the similarities and differences, advantages and disadvantages of the belt drive versus the direct drive. The heart of a teacher.
A correction on pumps. Direct drive pumps operate at 3400 RPM, belt drives operate at 1750RPM. The pumps are not the exact same, you can't put a direct drive pump on a belt drive and operate it at half the RPM it needs, you will not get the same psi or GPM. If you put a belt drive pump on a direct drive machine, you would surly blow it up operating a 2x the rated RPM. Direct drives pull water just fine from a tank if plumbed up correctly. I've got 2 direct drives that pull straight from tanks and have for 6 years. The problem is everyone thinks that belt drives are better because they are told that. Everyone keeps reciting exactly what you just said without actually having knowledge or experience of plumbing a direct drive to a buffer tank.
Thank you for repeating almost exactly what I stated. Your points of how the 2 pumps are different was already stated in the video. I did not say you CAN'T use a direct drive pump on a tank. My comment was you should not use a direct drive pump to SIPHON from a tank. You can use the direct drive if plumbed so the pump is at the same level as the output from the tank or the pump being lower. This is NOT siphoning. You are using the pressure from the tank to feed the pump. Typically the pressure from the draining tank will produce enough pressure to maintain the minimum gpm the pump needs to operate safely and properly. As the volume of water decreases from the tank, the gpm is reduced. Again, I stated siphon. There is a difference. A direct drive can be hooked up to siphon, but it will damage the pump.
I would imagine you could customize the rpm of any pump just by switching pullyes. With a little imagination you could even set up a direct drive pump with a short shaft and a pulley. We do stuff like that all the time on the farm. Lots of old drill presses required pulley changes to change rpm. But as brian stated, cavitaion with low head pressure and high rpm pumps is a problem.
Exactly, Brian said that the direct drive and the belt drive pumps are exactly the same and the parts. I disagree with that as well. Obviously if the pump is spinning half the rpm as a direct drive would be the output would be cut in half. So they can't be the same pump. I was going to reduce the pulley size on my belt drive pump just a little to increase GPM by about 15% from stock. If you wanted to take the direct drive pump off and mount and use as a belt drive, you could but would need to use the same size pulley that is on the motor so the pump turns at 3500 rpms. It is a 3500 rpm pump at that given psi/gpm.
@@Brian_the_repair_guy you are wrong my friend. My direct drive pulls the water up too the outlet hose when the water line goes below the outlet hose. In fact I have ten gallons under the outlet hose . It pulls until my tank is dry . It is pulling water almost 3 foot straight up to exit the tank hose that feeds the pump. You wanna explain that ?? Or do I have a magical direct drive pump ??
Hola. Hay unos conceptos que no te lo claros. La bomba girando a mitad de vueltas, a través de un sistema de poleas, obtiene los mismos valores?? Es necesario, en una bomba lineal, que el motor gire a 3500 para que alcance la bomba la máxima potencia? Si abres el mando de presion atope y bajas las rpm del motor, en una bomba lineal, bajarías la presión al girar el motor más lento? Voy a comprar una hidrolavadora y no termino de decidirme.
Is a belt drive pressure washer able to run or pull off of a buffer tank? I want to set up a small PW business and don’t have the money to spend on a mobile pressure washing system (12k) i have a buddy that has a belt drive PW with the honda 390x engine for sale and would love to set up something on my trailer
A belt drive is better suited to pull from a tank. My suggestion, have the pressure washer lower than the outlet of the tank. Don't have the washer pull "up" from the tank, have the washer attached to the bottom of the tank with the largest diameter and shortest hose possible.
I cannot seem to keep my belts from burning up and smoking on my belt driven pressure washer do you have any videos that can help me figure out why it will randomly start smoking and burning my belts I have tried running them looser I have tried running them tighter
Make sure your pulleys are aligned with each other. Have you removed the belt cover to see where the friction is happening. Is it happening at the pump or the engine?
@@sk1fpv your pump should not stop it should run continuously. Does it smoke the belts if it runs and the trigger stays pressed? Can you run the machine with NO pressure hose attached? Will it then run with no smoking?
@@Brian_the_repair_guy with the wand held the belts do not smoke but after running for about an hour if they let go of the trigger the pump will stop spinning in the motor will keep going and burn the belts. It runs fine with no pressure hose hooked up to it
@@sk1fpv if I had to guess (without having the machine here) your pump is producing more pressure that it can handle. On direct drive ot would stall the engine. Belt drive, the belts burn. Try turning your unloader down to reduce pressure. If the unloader has gone bad that may not help. You would need to replace the unloader. Keep me informed
They say not to run pressure washer at anything other than full throttle. Most say becuase it will cause it not to cool as well. Now accordimg to this theory of beijg the same pump running at half speed, hiw is that different to throttling down a direct drive to push the pump at half speed?
When people refer to cooling, they should be talking about the engine. Both the pump and the engine need to be cooled. The engine is strictly cooled by air flow. Faster rpms, the more air is pulled or blown across the cooling fins. The pump is air cooled simply because the surrounding air moves, not due to design. The movement of water through the manifold is where the cooling process for the pump is focused.
Good day sir, I have pressure washer with Bertolini ttk2130 1450rpm with gear box attach to Hertz 1d81z diesel engine 3000rpm and now the gear box have a crack and i want to change the gear box seat-up to belt driven my question is what size of pulley i need for this set-up. the shaft size are both 24mm, Getting advise here in Australia is very hard, thank you in advance
The pulley set up should be a 2:1 ration. Larger diameter pulley on the pump, smaller diameter on the engine. Approximately 17.8 cm on the large pulley. Use double belt pulley
Say Bryan I got a couple questions I have a belt drive BE you mentioned to use the machine full throttle if not, you’ll have problems can you explain that please?
Good question. Air-cooled engines are meant to run at full throttle when running for longer periods of time. These engines, as the name states, are air cooled. The slower the engine is running, the less air you have being forced around the engine. This means the engine runs hotter and can over heat. Running the engine slower also means the flow rate of the water is reduced. The increased flow rate of water is what keeps the pump itself cool. As in I show in a couple other videos, a hot pump can be costly.
ok this is like the tenth video i have watched on belt drive PWs and i still dont get it? i get how the belt and pulleys put less RPMs on the pump, but i dont understand how you get the pump back up to the full RPMs. now finally this guy explains that a 4GPM pump connected to a 3600 rpm motor does not need the full 3600 RPMs to make the 4GPM a min, so why run the motor at 3600 RPM to begin with? if you have a direct drive, why could you not just idle the motor down to what your getting from your belt pulley system?
Lower idle speed puts far more strain on the engine. Trying to reach 3600 psi at 4 gpm at 2000 rpm will likely stall the engine when the trigger is pulled or you just may not get to 3600 psi. The engine works the hardest at flow, not in bypass. To ensure the engine does not stall, you need more torque. In a gasoline engine, you get that at higher rpms
@@Brian_the_repair_guy ok i am close now. in order for your 4gpm pump to get max 4gpm, you have to have X amount of RPM and torque. direct drive needs high RPM to create the required pump torque, the belt drive creates the same torque at lower RPM thus giving the same GPM at lower RPM. is this correct?
@@joeydelrio sounds like you are on the right track. I do not pretend to know it all, but this has been the way it was explained in training classes over the years.
Fantastic explanation of the similarities and differences, advantages and disadvantages of the belt drive versus the direct drive. The heart of a teacher.
Thank you. Glad you like it. Be sure to subscribe
@@Brian_the_repair_guy busted😂
Brian Excellent explanation, very clear and direct.
Thank you. Hope it was helpful
best explanation i’ve seen on this! thank you. new subscriber
Very glad to help
Thanks for the explanation! New sub here!
Glad to help
A correction on pumps. Direct drive pumps operate at 3400 RPM, belt drives operate at 1750RPM. The pumps are not the exact same, you can't put a direct drive pump on a belt drive and operate it at half the RPM it needs, you will not get the same psi or GPM. If you put a belt drive pump on a direct drive machine, you would surly blow it up operating a 2x the rated RPM.
Direct drives pull water just fine from a tank if plumbed up correctly. I've got 2 direct drives that pull straight from tanks and have for 6 years. The problem is everyone thinks that belt drives are better because they are told that. Everyone keeps reciting exactly what you just said without actually having knowledge or experience of plumbing a direct drive to a buffer tank.
Thank you for repeating almost exactly what I stated. Your points of how the 2 pumps are different was already stated in the video.
I did not say you CAN'T use a direct drive pump on a tank. My comment was you should not use a direct drive pump to SIPHON from a tank. You can use the direct drive if plumbed so the pump is at the same level as the output from the tank or the pump being lower. This is NOT siphoning. You are using the pressure from the tank to feed the pump. Typically the pressure from the draining tank will produce enough pressure to maintain the minimum gpm the pump needs to operate safely and properly. As the volume of water decreases from the tank, the gpm is reduced. Again, I stated siphon. There is a difference. A direct drive can be hooked up to siphon, but it will damage the pump.
I would imagine you could customize the rpm of any pump just by switching pullyes. With a little imagination you could even set up a direct drive pump with a short shaft and a pulley. We do stuff like that all the time on the farm. Lots of old drill presses required pulley changes to change rpm. But as brian stated, cavitaion with low head pressure and high rpm pumps is a problem.
@@j.d.ensminger1710 you can indeed set a direct drive up as a belt drive if you have the skill to properly assemble the materials needed.
Exactly, Brian said that the direct drive and the belt drive pumps are exactly the same and the parts. I disagree with that as well. Obviously if the pump is spinning half the rpm as a direct drive would be the output would be cut in half. So they can't be the same pump. I was going to reduce the pulley size on my belt drive pump just a little to increase GPM by about 15% from stock. If you wanted to take the direct drive pump off and mount and use as a belt drive, you could but would need to use the same size pulley that is on the motor so the pump turns at 3500 rpms. It is a 3500 rpm pump at that given psi/gpm.
@@Brian_the_repair_guy you are wrong my friend. My direct drive pulls the water up too the outlet hose when the water line goes below the outlet hose.
In fact I have ten gallons under the outlet hose .
It pulls until my tank is dry .
It is pulling water almost 3 foot straight up to exit the tank hose that feeds the pump.
You wanna explain that ??
Or do I have a magical direct drive pump ??
Hola. Hay unos conceptos que no te lo claros.
La bomba girando a mitad de vueltas, a través de un sistema de poleas, obtiene los mismos valores??
Es necesario, en una bomba lineal, que el motor gire a 3500 para que alcance la bomba la máxima potencia?
Si abres el mando de presion atope y bajas las rpm del motor, en una bomba lineal, bajarías la presión al girar el motor más lento?
Voy a comprar una hidrolavadora y no termino de decidirme.
Hello might I add a huge reduction in engine vibration transfer to the pump with belt drive!
If you have a problem with vibration, there may be an issue with your machine.
Yes, a belt drive has reduced vibration
Is a belt drive pressure washer able to run or pull off of a buffer tank? I want to set up a small PW business and don’t have the money to spend on a mobile pressure washing system (12k) i have a buddy that has a belt drive PW with the honda 390x engine for sale and would love to set up something on my trailer
A belt drive is better suited to pull from a tank. My suggestion, have the pressure washer lower than the outlet of the tank. Don't have the washer pull "up" from the tank, have the washer attached to the bottom of the tank with the largest diameter and shortest hose possible.
@@Brian_the_repair_guy thank you!!
I cannot seem to keep my belts from burning up and smoking on my belt driven pressure washer do you have any videos that can help me figure out why it will randomly start smoking and burning my belts I have tried running them looser I have tried running them tighter
Make sure your pulleys are aligned with each other.
Have you removed the belt cover to see where the friction is happening. Is it happening at the pump or the engine?
@@Brian_the_repair_guy wow thanks for the quick response. The pump stops spinning and the motor keeps going and that is where it pops
@@sk1fpv your pump should not stop it should run continuously.
Does it smoke the belts if it runs and the trigger stays pressed?
Can you run the machine with NO pressure hose attached? Will it then run with no smoking?
@@Brian_the_repair_guy with the wand held the belts do not smoke but after running for about an hour if they let go of the trigger the pump will stop spinning in the motor will keep going and burn the belts. It runs fine with no pressure hose hooked up to it
@@sk1fpv if I had to guess (without having the machine here) your pump is producing more pressure that it can handle. On direct drive ot would stall the engine. Belt drive, the belts burn.
Try turning your unloader down to reduce pressure. If the unloader has gone bad that may not help. You would need to replace the unloader.
Keep me informed
They say not to run pressure washer at anything other than full throttle. Most say becuase it will cause it not to cool as well. Now accordimg to this theory of beijg the same pump running at half speed, hiw is that different to throttling down a direct drive to push the pump at half speed?
When people refer to cooling, they should be talking about the engine. Both the pump and the engine need to be cooled. The engine is strictly cooled by air flow. Faster rpms, the more air is pulled or blown across the cooling fins. The pump is air cooled simply because the surrounding air moves, not due to design. The movement of water through the manifold is where the cooling process for the pump is focused.
Hey so your saying dialing down a direct drive pressure washer to half strength can damage the pressure washer over time?
I don't think I made that statement. If I made it seem that way then that was not my intention. Using the machine at lower pressure is perfectly safe
@@Brian_the_repair_guy ok thanks I know that's a debate for direct drives I get mixed messages from my research
@@trillhomie8322 exactly what is your concern?
@@Brian_the_repair_guy if it's OK to turn down my unloaded to use my pressure washer like a soft wash system when need be.
@@trillhomie8322 yes it is, as long as the unloader is adjustable by hand
Good day sir, I have pressure washer with Bertolini ttk2130 1450rpm with gear box attach to Hertz 1d81z diesel engine 3000rpm and now the gear box have a crack and i want to change the gear box seat-up to belt driven my question is what size of pulley i need for this set-up. the shaft size are both 24mm, Getting advise here in Australia is very hard, thank you in advance
The pulley set up should be a 2:1 ration. Larger diameter pulley on the pump, smaller diameter on the engine. Approximately 17.8 cm on the large pulley. Use double belt pulley
thank you for quick reply your the best@@Brian_the_repair_guy
@@masanoel25 hope it helps
Do you mean if the large pulley is 18cm then the small pulley is 9cm?@@Brian_the_repair_guy
@@masanoel25 yes
Say
Bryan I got a couple questions I have a belt drive BE you mentioned to use the machine full throttle if not, you’ll have problems can you explain that please?
Good question. Air-cooled engines are meant to run at full throttle when running for longer periods of time. These engines, as the name states, are air cooled. The slower the engine is running, the less air you have being forced around the engine. This means the engine runs hotter and can over heat.
Running the engine slower also means the flow rate of the water is reduced. The increased flow rate of water is what keeps the pump itself cool. As in I show in a couple other videos, a hot pump can be costly.
ok this is like the tenth video i have watched on belt drive PWs and i still dont get it? i get how the belt and pulleys put less RPMs on the pump, but i dont understand how you get the pump back up to the full RPMs. now finally this guy explains that a 4GPM pump connected to a 3600 rpm motor does not need the full 3600 RPMs to make the 4GPM a min, so why run the motor at 3600 RPM to begin with? if you have a direct drive, why could you not just idle the motor down to what your getting from your belt pulley system?
Lower idle speed puts far more strain on the engine. Trying to reach 3600 psi at 4 gpm at 2000 rpm will likely stall the engine when the trigger is pulled or you just may not get to 3600 psi. The engine works the hardest at flow, not in bypass. To ensure the engine does not stall, you need more torque. In a gasoline engine, you get that at higher rpms
@@Brian_the_repair_guy ok i am close now. in order for your 4gpm pump to get max 4gpm, you have to have X amount of RPM and torque. direct drive needs high RPM to create the required pump torque, the belt drive creates the same torque at lower RPM thus giving the same GPM at lower RPM. is this correct?
@@joeydelrio sounds like you are on the right track. I do not pretend to know it all, but this has been the way it was explained in training classes over the years.
Power curve of the motor.