Volvo penta aqd40a aq series 280 outdrive bell house intermediate shafts bearings replacement
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- Опубліковано 17 лип 2024
- A quick video to show how to replace the bearings on the Bell house intermediate shafts for volvo penta aq series drives.
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In the Marine world, the bellhousing is actually a Flywheel Cover.
The bearings will be industry standard bearings.
The seals are also industry std in a TCM or Timken.
The forward seal must be staked or glued into position. If you lose the seal, no future grease will make it to the aft bearing.
The aft seal installs in the non-conventional direction. In other words, when installed you will be able to see the lip and tension spring.
As said earlier, before you install the seals, start filling the PDS cavity while you spin the PDS.
Only after you see grease exit the ball cage will you install the seals!
I was notified that Paul Curel just left a question..... but I do not find it here.
Paul asked:
"Are those two bearings pressed in from the snout and are the side by side of each other? Reason I'm asking as where that smaller seal goes it is thinner in dimension for about 1 inch then gets wider to the 62mm diameter towards the snout!"
Paul, I may not be understanding your question, but I'll take a stab at it.
The two bearings sit FWD and AFT of each other (not side by side).
Only one bearing (the AFT bearing) is pressed onto the PDS, followed by 1 compression snap ring.
The PDS, along with the now installed AFT bearing, are now pushed back into the "clean" Flywheel Cover until it comes to rest against the stop within the F/C bore.
One large snap ring is now installed.
The second large snap ring follows.
The FWD bearing is a friction fit onto the PDS and within the Flywheel Cover bore.
The AFT seal is then pushed into place against the AFT-most large snap ring (lip and tension spring will be visible).
You will NOT see the AFT-most snap ring once completed! (it will be ahead of this seal)
Keep in mind that these are Industry Standard bearings and seals. No need to purchase via Volvo Penta.
By the way, the PDS fits within the Marine Flywheel Cover. Bellhousing is an Automotive term.
At 7:26 into the video, he shows us the grease fitting at 12:00 O'clock position.
This fitting can be replaced with an 18" grease gun extension hose with a zerk fitting installed in the loose end.
Fasten the hose up where it will be in plan sight and you won't be inclined to forget servicing these bearings during each oil change.
Pump the new grease in while Engine is at idle speed....... Dynamic -vs- Static!
For any of you who would like to see detailed images and more detailed instructions, do a Google search using key words "Volvo Penta PDS bearing replacement" followed by "2850Bounty" or "RicardoMarine".
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One additional and redundant thought…… If the PDS grease cavity is NOT pre-filled, the 4 to 5 future service pumps of grease will never make it to the more important AFT bearing! Make sure to "Pre-Fill" the grease cavity (as you spin the PDS) prior to installing the AFT seal.
Also, whatever type of grease you start out with will be the type of grease that you were want to continue with.
Mixing unlike grease chemistries can cause problems with viscosity!
And again…… the FWD seal must be staked or glued in place, and remember that the AFT seal installs in the non-conventional direction.
There is no need to pre-pack these bearings.
Install the PDS with the bearings, but do not yet install the seals.
While spinning the PDS, pump the new grease into the flywheel cover's grease port.
As you spin the PDS (key word "spin"), the new grease will fill the cavity, then enter and exit the ball cages.
By spinning the PDS as the grease is added, it will not only purge the cavity of any air, it will pack both bearings.
Now install the seals!
FYI... if the cavity is not pre-filled, future greasing attempts will NOT sufficiently reach the bearings.
Can someone post all dimensions ( bearing type) needed? Bearing and Seals?
@@Vbokisha These will be industry standard bearings. The industry std number will stamped or laser etched into the outer race. The seal dimension will also be on the old seal casing.
And by the way....... davemolony1 fails to show or mention that the FWD seal must be glued and/or staked into position. If you loose the FWD seal, no future grease will make it through the AFT bearing.
The AFT seal installs in the non-conventional direction.... i.e., lip and tension spring visible. This is so the AFT seal can breach any excessive grease.
@@markemery49 i mesured bearing housing 62.25 i assume it's not damaged but as you sayd seal needs to be glued but also bearing!? And if you can tell me AFT is? Excessive grese goes in flywheel or in bellow. Thank you for reply!
@@Vbokisha The bearings and seals will be listed in a Metric dimension.
Only the FWD seal will be glued and staked into position.
The bearings are secured via snap rings.
You will pre-fill the grease cavity (while you spin the PDS) before installing the AFT seal.
The AFT seal installs in the non-conventional direction!
The AFT seal installs up against the AFT most snap ring..... NOT ahead of the snap ring.... behind it.
And yes, if the PDS cavity needs to purge any excessive grease, it will make it past the AFT seal lip, and will fall into the drive shaft bellows area.
@@Vbokisha FWD is forward, in other words towards the bow, no matter where you are at the time and no matter what position the Flywheel Cover is in while doing the work.
AFT is rearward, in other words towards the stern, no matter where you are at the time and no matter what position the Flywheel Cover is in while doing the work. .
With a Double Bearing PDS, the FWD bearing is secured by a snap ring that fits into a snap ring retaining groove within the aluminum flywheel cover (aka bellhousing in Automotive terms).
The bearing is NOT glued! The snap ring holds the bearing in position!
After the PDS has been re-installed, the FWD seal is glued and staked so that it can not be pushed out via Grease Gun Pressure.
Then after the PDS cavity has been pre-filled , the AFT seal is then installed in the (lip and tension spring facing AFT).
By design, any future excess grease will make it's way past the AFT seal, and will purge into the drive shaft bellows.... NOT into the flywheel area!
The FWD seal should NOT breach, nor should it be allowed to be pushed out of position by excessive grease force........
If the FWD seal was NOT glued or staked, it may be pushed out of it's bore by excessive grease force.
If that was to occur, no future grease will make it to the AFT bearing, of which is the more important bearing!
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