vclic
Scoot Junior
Posts: 8
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Post by vclic on May 18, 2018 16:59:28 GMT -5
Hi all, As per title. I had the scooter for about a week when it first happened with oil coming out of my cvt. Replaced the seal and it lasted about another week, replaced it again this time using some oil seal glue which lasted about 2 weeks. The input shaft is solid and does not wobble, so bearings seems fine. I`m wondering if there is pressure building up inside the gear box. Are there any valves or pipes on a 50cc gy6 Peugeot v clic that maybe blocked causing pressure? I cannot see any and cannot find any info on the internet either. I have not stripped down the gear box yet and tbh I never have done one so not looking forward to it.. Cheers Andy  |
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Post by jeff84 on May 18, 2018 17:25:04 GMT -5
sure sounds like your crankcase vent is blocked.
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vclic
Scoot Junior
Posts: 8
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Post by vclic on May 19, 2018 4:56:41 GMT -5
Im a bit of a noob, but I thought that would affect the crankcase seal and not the gearbox/input shaft seal?
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Post by pinkscoot on May 19, 2018 9:29:41 GMT -5
Do you keep putting the same seal in? you should use a new one. It may be that the seat where the seal sits is warn and you might need a slightly larger seal or the PO put too small of a seal in and you keep duplicating the problem. I would get a new seal based on the spec for that seal, I'm not familiar with the QMB139 engines so I can't tell you what the size should be. When you put it in be sure its flush with the case and doesn't go in too far.
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Post by jackrides on May 19, 2018 14:41:53 GMT -5
Does the seal pop out? Or, does it leak from the shaft or the case? Are you overfilling the gearbox? How does it let you know it is full?
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vclic
Scoot Junior
Posts: 8
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Post by vclic on May 20, 2018 12:04:38 GMT -5
Hi,
Yes a new seal is used every time. I am not sure of the exact seal size. I have bought a packet of seals of which 2 of them fit snugly and one of them is supposed to be for the input shaft. One is 5mm and the other is 6mm thick if I remember correctly. However I have tried them both.
I have asked suppliers which one is for the input shaft and they do not seem to know. I have emailed 7 or 8 suppliers of input shafts from around the world to ask them which is the correct one and hopefully will get an answer after the weekend. I have also asked this question on some other scooter websites but no one seems to know/answer. Other than that I`m not sure where to get the info from.
The seal pops right out of its housing and makes a grinding noise for a couple of seconds. Probably against the clutch housing. Then the oil leak starts soon after from the cvt case
I am putting 100ml of oil in the box.
Cheers
Andy
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Post by jackrides on May 20, 2018 12:31:24 GMT -5
Get a vernier caliper (doesn't have to be fancy) and measure the shaft and the case at the contact point. Most likely it will be an even # of millimeters. Thickness isn't critical, but could stick out a Little. The outer seal surface and case should be absolutely clean of oil and fingerprints. Use a little appropriate adhesive, keep it OUT of the bearing, let it dry before oil touches it. And/or make a sheet metal strap or plate to hold it in place.
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Post by pinkscoot on May 20, 2018 13:15:38 GMT -5
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Post by tocoo on May 21, 2018 1:32:32 GMT -5
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Post by pinkscoot on May 21, 2018 9:19:18 GMT -5
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Post by tocoo on May 21, 2018 11:54:26 GMT -5
Hi all, As per title. I had the scooter for about a week when it first happened with oil coming out of my cvt. Replaced the seal and it lasted about another week, replaced it again this time using some oil seal glue which lasted about 2 weeks. The input shaft is solid and does not wobble, so bearings seems fine. I`m wondering if there is pressure building up inside the gear box. Are there any valves or pipes on a 50cc gy6 Peugeot v clic that maybe blocked causing pressure? I cannot see any and cannot find any info on the internet either. I have not stripped down the gear box yet and tbh I never have done one so not looking forward to it.. Cheers Andy peugeot separates the manual of the motor form the manual of the scooter, so you can get the pdf here. I do not know which motor the vclic has. My kisbee has the SYM motor 139QMB www.crservice.dk/Peugeot/Service%20manual/peugeotsm.htm MOTEUR_50CC_4T_2S-04A.pdf Service manual 50cc 4T motor JNQQ MOTEUR_50CC_SYM_04D.pdf Service manual 50cc 4T motor SYM (TWEET mfl..) |
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Post by tocoo on May 21, 2018 12:28:50 GMT -5
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Post by GrumpyUnk on May 22, 2018 12:09:46 GMT -5
The CVT final drive gearcase is vented. Some have a tube attached to the vent, others go directly to atmosphere. The hole is at the bottom of the case, forward from the lube drain hole. Inside the case, the vent passage wiggles around, going up/down/etc to prevent fluid from migrating out and water/dreck from migrating in. The vent used is a sort of 'labyrinth'.
If you were to attach a tube to the vent at the bottom, and blow into it, with the fill port open, you should fell/hear/see the result coming out the filler port. Air should be able to travel freely.
The seal should fit snugly into the case, and require some effort to seat. I think more effort than you can generate using fingertips. I think you should have to 'drive' the seal into the side of the case, using a length of PVC or other tube. There are videos local to the site demonstrating the procedure.
I would inspect the bore where the seal is expected to reside, looking for evidence of damage that would make the seal fit less snugly. You could possibly use a chisel or punch the metal around the edge of the bore to wedge the seal in place. If you peen the edge on 3-4 spots around the diameter, you may be able to wedge some metal over the seal diameter so it is difficult for the seal to push out.
I would have expected the seal to fail by leaking lube if the pressure was raised in the gearcase. Popping the seal out indicates either a too-loose bore, or an undersized seal.
I found the dimensions at one point in time, but have to find them in the basement...
tom
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Post by cagiva4ever on May 22, 2018 18:43:56 GMT -5
what color was your original Oil Seal on the GearBox shaft ?
there are wrong size/faulty/"fake" oilseals at least for the Crankshaft, where original is Brown'ish color and "aftermarket" oilseal is black color. them black ones go in loosely like pushing them in with pinky finger.
maybe your gearbox shaft has now same curse issue ?
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