Very helpful. Grab a piece of cardboard and push in your bolts (like you do with head bolts on a car) then put same bolt back in same hole... Your brass valve guides MUST go back with the same piston (all pistons on micrometer will vary in size.) Great vid and helpful detail👍
hey guys great video, much appreciated, short question, pump need to be disconnected from engine to do this overhaul? or can be still connected or attached to engine? many thanks, great video!
What is the black plastic thing at the bottom right of the screen at 6:41 ? Mine is leaking from there and I can't find a replacement part number or name.
When you reassembled the pump you installed the first set of seals Black, White & the Red last. The second and third sets of seals Black, Red and the White seal last. Does it make any difference? Anyway I liked the video and I think you did a good job.
+Gary Shaffer Yes it does matter what order they are installed, uou should set the seals in the same order they originally came out. Which would be the black one first, then red, then white on top.
Nice job. On my washer I have an issue when I release the trigger on the sprayer it kills the engine immediately. Do you think it might be a stuck seal?
Hello, JN Equipment. I would like to know the dimensions of oil seal crankshaft or where can I find it. Thanks in advance. (I am asking as of now trimmer is nor right next to me(another city) but i need to buy spare part.
All the power washers works in the same way so my question is those seals are different for each pump, model, brand or size or those seals are kind of universal for any pump?
+Mr E (channel) These seals will be different pump to pump and depending on brand and model. These seals fit around the plunger which can have different diameters. You will need to know your pump model in order to get the correct seals.
What if you have a leak on an AR pump, put in all new kit but it still leaks? Put everything in properly, no scoring, no twisted seals etc...I hate to keep putting money into the pump and from what I understand if I take it apart again to inspect after running it I'll have to replace everything again and still risk having leak. The leak was just a drip every couple of seconds originally. After I put the kit in the drips didn't change. The AR pump is an RKV4G35. It is about 15 years old, probably has at most 200hours on it. The oil has been changed every year, no water in oil. Wondering if it would be more cost effective to put a new pump on. Thx for any input!
Yes, it's between the head and the body. I cannot figure out which cylinder. Not sure if there is something particular other than swap out the internals and see if I can define which is the problem. I don't like the idea of putting more money into this pump if I cannot pin it down. In your opinion what is "the" pump. I change oil every year, don't let it run unless the gun or disc is on etc...basically have babied this machine over the last 15 years. GX390 is like new so if you think investing in pump is smart I'd consider it rather than dump more money into a pump that may have met the realistic service life.
Honestly if the pump is 15 years old. It would probably be a good investment to just pick up a new one. We have a large selection of pumps which would mount right to your GX390 under $300 which are high quality and contractor power. I would suggest the EZ4040, ZWD4040, or 66DX. You can see them all at www.jnequipment.com and search for the models mentioned above.
Is there a preference with the pump. I've had good luck with the AR pumps but if you have a logical reason to switch to a General or other I'd like to know what I'm missing. Do they all have a 5 yr warranty or with AR is the warranty a joke anyway? TY
All the pump companies have pretty similar warranty so that's a non issue. If you have had good experience with AR you might as well stick with it. They build pretty solid pumps. You can check out ALL the pump models and pump packages for AR over at www.arpumpsonline.com
Saludos los felicito muy buen video se ve que son totalmente profesional pero la verdad no entiendo muy bien el inglés no sé si pudieran subir un video con subtítulos se lo agradecería muchísimo gracias y éxito 🙂
What was the symptom that you knew that this had to be done? My 4200 PSI pressure washer is only giving like 100 PSI when I pull the trigger and then goes back to 2000 psi . Never 4000. Will this fix that problem?
By the way mate, I just done a full repair on a ws202, I tried using your trick with the plyers and the cloth to no avail, I suggest using a " sliding hammer" worked very well and came out immediately despite being a very old pump. Hope this tip helped some what- thanks
a "sliding hammer" like one seen here: www.jnequipment.com/shop/brands/general-pump/100783-general-pump-packing-extraction-tool-kit/ is actually the BEST tool to use since it's very unlikely to cause damage. Most people don't have these tools around. You have the right idea tho.
Thank you for this and the seal replace video!!! This was exactly the how-to I was looking for. Time to save some money. Greatly appreciated!
Very helpful.
Grab a piece of cardboard and push in your bolts (like you do with head bolts on a car) then put same bolt back in same hole...
Your brass valve guides MUST go back with the same piston (all pistons on micrometer will vary in size.)
Great vid and helpful detail👍
hey guys, can I do the replace of the seals with the pump still attached to the engine? thank you!, great video
hey guys great video, much appreciated, short question, pump need to be disconnected from engine to do this overhaul? or can be still connected or attached to engine? many thanks, great video!
Thank you for taking the time to make this video, most helpful.
What is the black plastic thing at the bottom right of the screen at 6:41 ? Mine is leaking from there and I can't find a replacement part number or name.
that is a "thermal valve" or "thermal relief valve". www.jnequipment.com/shop/brands/general-pump/10055x-gp-pump-thermal-protector-valve-ptp/
JN Equipment
Thank you sir! I've been looking everywhere for that part! Now I can finally fix it 😂
When you reassembled the pump you installed the first set of seals Black, White & the Red last. The second and third sets of seals Black, Red and the White seal last. Does it make any difference? Anyway I liked the video and I think you did a good job.
+Gary Shaffer Yes it does matter what order they are installed, uou should set the seals in the same order they originally came out. Which would be the black one first, then red, then white on top.
You replaced the seals differently than the way they were taken out.
Nice job. On my washer I have an issue when I release the trigger on the sprayer it kills the engine immediately. Do you think it might be a stuck seal?
Hello, JN Equipment. I would like to know the dimensions of oil seal crankshaft or where can I find it. Thanks in advance. (I am asking as of now trimmer is nor right next to me(another city) but i need to buy spare part.
+Julia Sok Hi Julia, You can find the breakdowns here: www.cometpump.com/support.php, and look for the breakdown of your pump.
JN Equipment Thanks a lot!!!
you installed the seals in the wrong order in the first one you replaced .
I did, but you get the idea of the repair. Hope the video helped anyway
All the power washers works in the same way so my question is those seals are different for each pump, model, brand or size or those seals are kind of universal for any pump?
+Mr E (channel) These seals will be different pump to pump and depending on brand and model. These seals fit around the plunger which can have different diameters. You will need to know your pump model in order to get the correct seals.
+JN Equipment got it thanks
What if you have a leak on an AR pump, put in all new kit but it still leaks? Put everything in properly, no scoring, no twisted seals etc...I hate to keep putting money into the pump and from what I understand if I take it apart again to inspect after running it I'll have to replace everything again and still risk having leak. The leak was just a drip every couple of seconds originally. After I put the kit in the drips didn't change. The AR pump is an RKV4G35. It is about 15 years old, probably has at most 200hours on it. The oil has been changed every year, no water in oil. Wondering if it would be more cost effective to put a new pump on. Thx for any input!
where is the drip coming from? Is it dripping between the brass head and body? or elsewhere? give me a little more info
Yes, it's between the head and the body. I cannot figure out which cylinder. Not sure if there is something particular other than swap out the internals and see if I can define which is the problem. I don't like the idea of putting more money into this pump if I cannot pin it down. In your opinion what is "the" pump. I change oil every year, don't let it run unless the gun or disc is on etc...basically have babied this machine over the last 15 years. GX390 is like new so if you think investing in pump is smart I'd consider it rather than dump more money into a pump that may have met the realistic service life.
Honestly if the pump is 15 years old. It would probably be a good investment to just pick up a new one. We have a large selection of pumps which would mount right to your GX390 under $300 which are high quality and contractor power. I would suggest the EZ4040, ZWD4040, or 66DX. You can see them all at www.jnequipment.com and search for the models mentioned above.
Is there a preference with the pump. I've had good luck with the AR pumps but if you have a logical reason to switch to a General or other I'd like to know what I'm missing. Do they all have a 5 yr warranty or with AR is the warranty a joke anyway? TY
All the pump companies have pretty similar warranty so that's a non issue. If you have had good experience with AR you might as well stick with it. They build pretty solid pumps. You can check out ALL the pump models and pump packages for AR over at www.arpumpsonline.com
Thank you for educating me.
Saludos los felicito muy buen video se ve que son totalmente profesional pero la verdad no entiendo muy bien el inglés no sé si pudieran subir un video con subtítulos se lo agradecería muchísimo gracias y éxito 🙂
I have power wash would engine work some kind of way with out water to put motor on go cart
Can you show the wiring with 5hp motor?
What was the symptom that you knew that this had to be done? My 4200 PSI pressure washer is only giving like 100 PSI when I pull the trigger and then goes back to 2000 psi . Never 4000. Will this fix that problem?
gracias por el video fue de gran ayuda un abrazo desde colombia edward orozco
By the way mate, I just done a full repair on a ws202, I tried using your trick with the plyers and the cloth to no avail, I suggest using a " sliding hammer" worked very well and came out immediately despite being a very old pump. Hope this tip helped some what- thanks
a "sliding hammer" like one seen here: www.jnequipment.com/shop/brands/general-pump/100783-general-pump-packing-extraction-tool-kit/ is actually the BEST tool to use since it's very unlikely to cause damage. Most people don't have these tools around. You have the right idea tho.
Black, red, white should be the right order the seals go back on 😆
Jorge duarte OMG he got a mistake hahhhah it will jam and shake the motor..
your right. Hope the video helped anyway
no it just didn't build the right pressure. the seals not being installed in the correct order should not effect the engine at all.
Thank you for the great info....Tim n Tina.
Thank you 💪🏼
Thanks for this video
you put the seals in the wrong way dude
Yea I made a mistake, but I hope the video still helped anyway.