270 bellows help..!!

[BETZ954]

I have a volvo penta aq125 a, 270 outdrive, planning on changing the bellows asap. i want to get everything i need on the first shot. don't want to get it tore apart then spend a week waiting on the mailman for anything i forgot.

so i looking for the part numbers for the drive, and exhaust bellows for my outdrive. i know there's a few o-rings i also need to order, but i'm having trouble finding the part # for them aswell... any help an also any tips for changing them would be great..!!!!

Also does the system need to be presser tested when fineshed?? if so where can i find sum gages to do this an how do i hook it up??

 

[captmello]

Re: 270 bellows help..!!

Here is a link with the info you need.

http://forums.iboats.com/showthread.php?t=309095

You don't have to pressure test.

 

[BETZ954]

Re: 270 bellows help..!!

Thanks, all the info i needed on that link.! thats what makes iboats so great, the helpful people that use it...

 

[Ucee]

Re: 270 bellows help..!!

I went to that link as well and printed it out to put in my tool box this site is very helpful im glad I came across it when i was surfin the net. I have a Volvo Penta AQ130D with a 270

 

[BETZ954]

Re: 270 bellows help..!!

Ok so ive been reading post an decided to also order new u-joints and a pds bearing w/seal. the pds bearing seems pretty layed out.
So my confusion is with the u-joints... how much more if any do i need to take apart the upper gear unit, is the any other seals i need to order? also how do the crosses of the joints come out and new one in, do they need pressed..??

 

[captmello]

Re: 270 bellows help..!!

I've heard you can change out the ujoints without any more disassembly but I'm not sure. When I did mine, I removed the ujoints and double bearing box by removing the 4 bolts that hold them into the upper.

#38 in this link are the four bolts.

http://www.volvopentastore.com/Upper-Gear-Unit-Aq-Drive-Unit-270-270t/dm/*******.711666581--**********.068451897--store_id.366--view_id.317448

Once the clamping ring and bearing box are removed, remove the bolt holding the ujoint yoke in the bearing box, # 35 in the link. Now the ujoint will be completely removed.

You have to remove the clips holding the ujoint heads in the yokes and drive the heads out from the inside. Once removed the new ujoint heads can be driven in and the retaining clips installed.

I would replace the two orings on the double bearing box for reassembly, #19 (2).

Also when you reassemble, put some loctite on the threads of the bolt, #35.

Good luck with your project, let us know how it goes and if you have any other questions.

 

[BETZ954]

Re: 270 bellows help..!!

Ok great i got the 2 o rings ordered up, an everything i need is now on its way. if it clears up out i think i will start bustin loose the bolts today. my goal is to have all compleated by the weekend!!!

 

[BETZ954]

Re: 270 bellows help..!!

Ok so i got the upper removed after a little fighting wit it. got most of the greese cleared out to i could get to the snap rings an bearings.

got the small snap ring removed, an now just have the seal to take out.. it looks as tho it is almost pressed in? is the any good methods to removing it? also is the larger snap ring behind it, because i could only see the small one that was directly aft of the pds bearing?

i started to remove the bolts holding the ujoint yoke in the bearing box. and wow are they tight. they're kinda making me worried to round them off. they started to round off my allen wrench so i stoped till 2morrow i think i'll by a new one with fresh corners hope it works...
also the round part the the front end of the bellow attaches to has sum wear towards the upper right. it my be hard to see in the pics. but is bad enough to notice tho... is this a problem...

 

[PiratePast40]

Re: 270 bellows help..!!

i started to remove the bolts holding the ujoint yoke in the bearing box. and wow are they tight. they're kinda making me worried to round them off. they started to round off my allen wrench so i stoped till 2morrow i think i'll by a new one with fresh corners hope it works...

DO NOT round out those allen head bolts! Since they don't want to come out easily, you will need to heat the clamping ring in order to get the bolts out. If you continue to have trouble, and don't feel comfortable heating the ring, take the assembly to a shop and have them loosen the bolts for you. I can tell you first hand that it can get expensive real quick if you mess up those bolts and the seating area.:redface:

 

[captmello]

Re: 270 bellows help..!!

The grease seals do just press in.

Are you going to change the flywheel cover bearings without pulling the engine?

There are two more snap rings. One behind the seal and one in front of the bearing.

I wouldn't worry to much about wear on the snout of the flywheel cover unless it interferes with the seal of the bellows.

 

[BETZ954]

Re: 270 bellows help..!!

ok it is worn a little on the upper part but is for sure good enough to seal the bellow.

yes im trying to change that bearing i think its called the pds bearing.(primary drive shaft bearing). So far i removed the seal, 2 large snap rings, an one smaller one. now im to the bearing.
i heard the bearing just pulls out with the shaft. i think i got everything removed that i needed to but i just cant seem to pull that shaft out. seems as tho there is still something holding it because i can move it back an forth alittle? my guess is that the outer race of the bearing is holding it?
i did try heating it up but seemed to do nothing. i used a lot of force this is a tough one...

The good news! the new u-joints are now installed.. i was kinda worried to change them, but they was really simple. anyone should be able to take them on, no problem...

Also there is no need to take apart the upper gear box to change them on the 270. It is a tight fit but if you keep rotating to the right spot all will fit.....

 

[captmello]

Re: 270 bellows help..!!

Also there is no need to take apart the upper gear box to change them on the 270. It is a tight fit but if you keep rotating to the right spot all will fit.....

Thats nice to hear. I had heard it before but was unsure.

So how are you pulling the driveshaft out? A slid hammer?

You are also one of the first I have seen change your bearing without pulling the engine. My flywheel cover has two bearings and must be removed with the engine.

Let us know how it turns out.

 

[BETZ954]

Re: 270 bellows help..!!

ok i did hear the v8 have two bearings an that only the aft one can be changed without pulling engine, but im not really to sure bout that.

i was just using big vice grips with another pair clamped on to them verticaly an taped that with a hammer. didn't really do much soo, after working on it today i went an picked up a slide hammer. but to use this im goning to hafta drill an tap the center of the shaft. it has a small divet but not threaded. would this be ok to do?

 

[captmello]

Re: 270 bellows help..!!

You're in uncharted waters with this project.

Have a look at page 95 of this manual. It talks briefly about changing the bearings.

http://www.4shared.com/file/89797332/5d203ad5/AQ211_thru_572.html

I'm a little concerned about the inner seal. I'm afraid it may get knocked out when you reinstall the driveshaft.

Drilling and taping the driveshaft seems like an ok thing to do, again, no prior experience with trying that.

Just consider the time and effort of doing the work compared to pulling the motor. I realize each boat is different, but I can have my motor hanging in a tree in half an hour.

Best of luck to you. Keep us updated.

 

[BETZ954]

Re: 270 bellows help..!!

ok so i had finally got the shaft out!! after spending a day trying to drill an tap it. i decided to use a plasma welder an welded a bolt to the end of it. next attached a slide hammer to the bolt, an with about 3 to 6 hits came right out.

reinstalling was fairly simple. just used a pipe the size of the inner race of the new pds an taped her home.

the inner most seal seem to be in surprizingly good shape. the shaft slips through it really well.....

 

[fishinpa]

Re: 270 bellows help..!!

ok so i had finally got the shaft out!! after spending a day trying to drill an tap it. i decided to use a plasma welder an welded a bolt to the end of it. next attached a slide hammer to the bolt, an with about 3 to 6 hits came right out.

reinstalling was fairly simple. just used a pipe the size of the inner race of the new pds an taped her home.

the inner most seal seem to be in surprizingly good shape. the shaft slips through it really well.....

Yeah just hope you didnt Tap to hard on that inner race going in !



fish

 

[BETZ954]

Re: 270 bellows help..!!

your right bout that. i think it went in smoothly tho, i used very light taps. also when i got it to where i had to turn the shaft for the inner splines to line up, %90 of the way, in it felt like i had a very good spin to it, that new feeling...

Also thanks for the helpful info Captmello. upper housing is now installed along wit new pds bearing, seals, u-joints, and bellow.. only one thing to do is test it out on the lake tomorrow!!!!