Upper / Lower Bearing Install

[Big Jay]

Hey everyone, still working on my complete tear down / rebuild and I've just replaced my upper and lower crank bearings on my '69 Merc 1000ss (2685637) and I used a hydraulic press to put the new ones on. Now, I was just reading another thread where someone mentioned the need to heat them up before install. I did no such thing.. have I made a boo boo here, or was this suggested as what to do in the absence of a press?

The thread is here: https://forums.iboats.com/forum/eng...6-merc-850-wrist-pin-needle-bearings-question

Another question I have is, the new top bearing was NOS Merc.. and the packaging was cracked a bit with some holes. Now that it's on, I can feel some grit/dirt inside when spinning it. Any suggestions on cleaning that out?

Thanks in advance for any input...

 

[The Force power]

Hey everyone, still working on my complete tear down / rebuild and I've just replaced my upper and lower crank bearings on my '69 Merc 1000ss (2685637) and I used a hydraulic press to put the new ones on. Now, I was just reading another thread where someone mentioned the need to heat them up before install. I did no such thing.. have I made a boo boo here, or was this suggested as what to do in the absence of a press?

The thread is here: https://forums.iboats.com/forum/engi...rings-question

Another question I have is, the new top bearing was NOS Merc.. and the packaging was cracked a bit with some holes. Now that it's on, I can feel some grit/dirt inside when spinning it. Any suggestions on cleaning that out?

Thanks in advance for any input...

It depends on how you pressed them on? if you applied the pressure on the inner-ring from the bearin to slide onto the crank = ok . The outer...not so much

I prefer to quickly heat up & slide on

You clean the bearing in brake-cleaner to remove stickiness & with compressed air (don't let the bearing spin around too much) after cleaning apply lubricant

 

[Big Jay]

Thanks for the reply, yes I used a proper sized socket to push only on the inner race when pressing.. guess I'll find some brake cleaner and try to spray them out and then done compressed air ro seal the deal.. though now installed on the crank, it's going to be tough to manoeuvre things haha..

Thanks again for your input...


J

 

[The Force power]

Thanks for the reply, yes I used a proper sized socket to push only on the inner race when pressing.. guess I'll find some brake cleaner and try to spray them out and then done compressed air ro seal the deal.. though now installed on the crank, it's going to be tough to manoeuvre things haha..

Thanks again for your input...


J

Should not be too bad to clean, if the crank is not already in the block???

 

[Big Jay]

No it's not back in the block yet, so it's doable.. but I'll be standing it on its end at an angle so it flushes downward away from the other journals etc. Awkward lol...

 

[Big Jay]

I'm still waiting on new roller bearings and reeds.. so it'll be a while before she's back together. I'd also like to think I'll have the outer parts painted before reassembly :joyous:

 

[The Force power]

No it's not back in the block yet, so it's doable.. but I'll be standing it on its end at an angle so it flushes downward away from the other journals etc. Awkward lol...

Boy, don't drop her. lol

 

[racerone]

Heat is a wonderful tool for installing bearings.-----There are induction bearing heaters for industrial use.-----Use calibrated wax " pencil sticks " to gauge the heat.-----Overheating is bad.---------Heck , I used to use hot water to install some bearings.-----Special bearings that ran /operated in hot water !-----No hammer required when you use heat.

 

[Big Jay]

Wow.. never knew that tech existed! I'm the I.T. at a Chevy dealership, so naturally I know everyone in every department. I had one of the long time mechanics help out with pulling the old ones off and pressing the new ones on. They have a 7ft tall hydraulic press controlled with a standard jack-handle bar.. quite efficient and quite controlled as well.

When we first put the new ones on I thought we'd pressed too hard on the top one (felt tight to turn), but then chalked it up to old grease from the NOS packaging. Once home I sprayed it out to be sure and found there was dirt or grit inside.... but it does turn freely thank God

 

[Big Jay]

Boy, don't drop her. lol

Ha! No worries about that! These old crankshafts aren't exactly growing on trees :lol:

 

[racerone]

Hopefully the crankshaft was properly supported to prevent any bending.

 

[The Force power]

Hopefully the crankshaft was properly supported to prevent any bending.

Good point:fear:as I said earlier; I prefer heat

 

[Big Jay]

Yes, I see now heat would've been the ideal route to take.. I don't think excessive force was used however, when they stopped up against the lobe, we stopped immediately.

 

[The Force power]

Yes, I see now heat would've been the ideal route to take.. I don't think excessive force was used however, when they stopped up against the lobe, we stopped immediately.

The possibility is there, a thou I don't think anything happened to the crank