drive shaft houseing

[ziggy]

ok, so i'm gettin ready to look at replaceing my ujoints + need to inspect the oil seal in the brg. assy.

1st question of many i'm sure. i don't wanna mess this up..

is it nessessary to seperate the lower from the upper?
is it nessessary to remove the top cover? (slightly ahead of myself, but the question is on my mind) it looks like this may be nesseassary to measure drive gear clearance. if i don't have to R&R brgs or cups. will it be nessessary for me to be checking this clearance.....

baring bad parts that will certainly lead to further dissassembly. i only want to remove as little as possible. however i do want to follow the instruction in 'the' book. and those are the first things it wants me to do...

the book also wants me to remove the waterpocket cover. why? i know i don't want to remove that....i been there before and don't want to break off the darn ss 1/4-20 bolts.....

still ahead of myself.....but,

rodbolt. from your statement #12. http://forums.iboats.com/showthread.php?p=1533526#post1533526 i do not see any referance in service manual #2 to useing the hose clamp to keep the brgs aligned for reassembly. i've only seen it on mercstuff. which at this point i'm skeptical of their info. (like R&Ring only the gimble brg w/o the carrier. or the final statement regaurding installing the brg. retainer...

The nut requires 200 pounds of torque, but if you multiply the length of the wrench it comes out to 120 foot pounds. If you do not have a wrench with the hole, you can hit the wrench a couple of times with a good sized hammer and it should be ok.

hit the wrench with a hammer??????? really.....wouldn't how tight that brg retainer nut is effect drive and drivin gear clearance?)

 

[Don S]

Re: drive shaft houseing

1.

is it nessessary to seperate the lower from the upper?

No, but while it's all apart, it would be a good time to do the everyother year impeller change.

2.

is it nessessary to remove the top cover? (slightly ahead of myself, but the question is on my mind) it looks like this may be nesseassary to measure drive gear clearance. if i don't have to R&R brgs or cups. will it be nessessary for me to be checking this clearance.....

Nope. That gear height is set with a different gauge. Plus, you won't be messing with that gear height.

3.

the book also wants me to remove the waterpocket cover. why? i know i don't want to remove that....i been there before and don't want to break off the darn ss 1/4-20 bolts.....

Don't even mess with the water pocket. The book doesn't want you to do anything. It just goes thru the process of doing EVERYTHING. You decide what is necessary or not, and messing with those water pocket screws are asking for trouble.

3.

i do not see any referance in service manual #2 to useing the hose clamp to keep the brgs aligned for reassembly. i've only seen it on mercstuff.

That is just something they found works better than trying to align it. It's in service manual #6 and 14 for the newer alphas, but it will work to keep your spacer in align also.

4.

hit the wrench with a hammer???????

Uhhhhhhhh, you need a torque hammer to do it that way.
Here (also from manual #6 is the torque chart. Note you have to machine a hole in the older tool (or easier, weld a socket on the end of the wrench) to use the tool and extension chart.

 

[ziggy]

Re: drive shaft houseing

1. Quote:
is it nessessary to seperate the lower from the upper?
No, but while it's all apart, it would be a good time to do the everyother year impeller change.

well, i replace the impeller on july 18 last summer. i only ran it dry once, 10-15 sec. i forgot to turn on the water...... probably closer to 10 but dry none the less. anyways. i was thinkin i'd just not do it. do it end of season next year so i can get on a schedual...... i was also gonna just leave the gear lub in it if i don't have to seperate the upper and lower.....is that an ok idea?

2A....

if i don't have to R&R brgs or cups. will it be nessessary for me to be checking this clearance(drive gear)....

?

The book doesn't want you to do anything. It just goes thru the process of doing EVERYTHING. You decide what is necessary or not,

thankyou for that clarification. guess i was thinking of the first statement in that section regaurding mercruisers recommended sequece of tear down......

3. Quote:
i do not see any referance in service manual #2 to useing the hose clamp to keep the brgs aligned for reassembly. i've only seen it on mercstuff.
That is just something they found works better than trying to align it. It's in service manual #6 and 14 for the newer alphas, but it will work to keep your spacer in align also.

whew. i was starting to think i couldn't read..........and i've read it over and over to no avail......

Uhhhhhhhh, you need a torque hammer to do it that way.

ahhhh, now i'm gettin hip......i didn't see it on the website. but i'll keep my eye open for them torque hammers....
on torque wrenchs though. darn. just found my click type only goes to 75ftlbs..... got a bar type up to 150 for the brg. retainer nut. but now i'm gonna have to consider the next size up click type for the pinion nut. unless i want to trust the bar type one. ? maybe....mercruiser is sure adament about torquein that pinion nut to 85 ft lbs....
thanks for the conversion chart. i'm hopeing the serria spanner has the drive hole there....in the pic it does.....i'm patiently waiting....couple a days i hope....

thankyou..... i think i'm ready to get into the deed........

 

[Don S]

Re: drive shaft houseing

If you don't replace any bearings or loose any shims on the drive gear, just put it back together, it will be the same as it was.

One thing you have to understand about the Merc manuals. They were designed for Merc techs that went to Merc schools, NOT for DIYers.
Aftermarket manuals only put small sections of OEM manuals in theres. So they cover even less.
Manuals 1 and 2 are even worse. Even techs couldn't figure out half of it. Mostly because it was still all fairly new.

 

[ziggy]

Re: drive shaft houseing

If you don't replace any bearings or loose any shims on the drive gear, just put it back together, it will be the same as it was.

thanks. that is what i was hoping. now if i get lucky and don't have the rusty's inside.....just took my old gear lub to the recycler today.....checked it again for water and still didn't see any....maybe i will be lucky.....
are these shims easy to loose? i've seen this note before. guess i'm expecting to see a cup in the upper houseing where the shims reside at. i'm expecting some may stay there and some may come out with the brg cup when removed. can ya drop'em inside the drive or something that i should be aware of? from the pics in the service manual. i don't see how ya could though.

One thing you have to understand about the Merc manuals. They were designed for Merc techs that went to Merc schools, NOT for DIYers.

and i only went to tech school, 25 years ago........ no wonder i'm lost....

Manuals 1 and 2 are even worse.

bummer, the two i got. that's the 1st time i've seen ya say something anti about a mercruiser manual......i'm guessin it's still the best i can do for info......just gonna have to deal with it....sure is great to have iboats around to help fill in the blanks......

thanks again for your help Don S........ you've helped me think i understand before i get there......for me, that's usually a step in the right direction......

 

[ziggy]

Re: drive shaft houseing

to late now....

so far. the worst looking parts are the ring, the oil seal carrier and the gear end yoke.....a little rust on the gears?

nothing is cleaned up yet. and nothings been inspected.....just the initial teardown.....thanks to all that've helped me....

 

[rodbolt]

Re: drive shaft houseing

like I said, carefully read the manual about pinion nut torque.
one style of bearing spacer combination needs a rolling torque and the other a straight torque. I just cant tell you out of memory which is which.you wont know anything about the gears and bearings until they are cleaned up.

 

[JustJason]

Re: drive shaft houseing

ugh.... manuals 1 and 2 are awefull!! i have them on pdf but i also have the orange cover ones.

if you have the shims out make extra sure you don't step on em, set something on them, drop them or when installing them make sure they don't fold.... those .010 ones are like paper and its really easy to damage one. if you fold one to the point that it creases it's no good.

 

[ziggy]

Re: drive shaft houseing

like I said, carefully read the manual about pinion nut torque.

thanks, and i will (have done) do so. they (mercruiser) seems real adement about that torque. 85 ft. lbs. aint sure what i'm gonna do about it yet...only have a beam type torque wrench that goes up to 85.....might have to get a click type one for the deed......

one style of bearing spacer combination needs a rolling torque and the other a straight torque. I just cant tell you out of memory which is which.

i think i do the straight torque method. my gear didn't need pressing off...

you wont know anything about the gears and bearings until they are cleaned up.

there clean now, but not inspected closely......initial note is that the brg. inner races + their mateing brg. cups look a shade blue to me..... futher inspection is in order

if you have the shims out make extra sure you don't step on em, set something on them, drop them or when installing them make sure they don't fold.... those .010 ones are like paper and its really easy to damage one. if you fold one to the point that it creases it's no good.

so far they aint out...they stayed with the upper, none came out with the brg. assy.... so far i've just left them there.......010" ay....yep, that's 3 pieces of paper......very thin......assumin i take them out to clean in there. i will be as carefull as i can be......