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Mower Deck Rebuild

bolens mower deck 18420

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#31 Newpaws493 OFFLINE  

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Posted May 16, 2012 - 04:08 PM

I spent some time getting everything put back together. I put some oil in the gear box and was about to put the belt cover on when I noticed oil was starting to pool at the low spot on the pulley. It looks like the oil seal needs to be replaced. :mecry:

I found that the seal possibly cross references to SKF 7443. Does anyone know if that would be correct?

I'm starting to work on gearbox, without a clue, could you offer assistance on parts removal?

Edited by Newpaws493, May 16, 2012 - 04:09 PM.


#32 mark843 OFFLINE  

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Posted May 17, 2012 - 12:24 PM

I'm starting to work on gearbox, without a clue, could you offer assistance on parts removal?


i never opened one of these up before, but I finally picked up the seals today and they seem to be the correct size. I will try and get some pics up and instruction up if I can figure it out.

#33 Newpaws493 OFFLINE  

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Posted May 17, 2012 - 12:53 PM

i never opened one of these up before, but I finally picked up the seals today and they seem to be the correct size. I will try and get some pics up and instruction up if I can figure it out.

well, I'll say your in for a lil' treat depending on your level. for me, flyin' blind it had a few frustrating moments. next time I'll (a) drain it,keep cloths available. (b)free u joint form box (stabilized section in vice) © remove four bolts to case,try not to damage seal.(d)pics, pics,pics (e) cofffee break and assess removal of gear &shaft. I probably spent the most time right there. my pics are @ Getting Deeper Into The '650 p.5. I'll check bk later..gotta scoot...take it slow,no damage (I found enough there already)

#34 mark843 OFFLINE  

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Posted May 18, 2012 - 07:32 PM

Took apart the gear box tonight. The gears look worn some but should still be good for awhile. The roll pin broke and I am not sure if it was broken, or if I broke it driving it out. I can't get the key off the horizontal shaft to pull that out but I don't think that seal is bad. I would like to replace it if I can. If anyone has any suggestions I am all ears.

mower_gear_box.jpg roll_pin.jpg

#35 Newpaws493 OFFLINE  

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Posted May 18, 2012 - 09:47 PM

hey, just got in. wondering if our set ups are the same. For me I sent roll pin part way down, rolled gear so pin was up then pulled it up/out next to roll pin was another set screw. once these are free; hold pulley and pull out w/shaft attached. gear should be left in box 'free' to just pick up/out...
IMG_6742a.jpg
if your stuff doesn't look like this then I must defer to more learned counsel. hang in there!

Edited by Newpaws493, May 18, 2012 - 10:10 PM.

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#36 Bolens 1000 ONLINE  

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Posted May 19, 2012 - 06:11 AM

You guys both have the same gear setups (Older Style)



Mark843: Where's the key your trying to get out?
Your gears are a bit worn but are still in good condition.
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#37 mark843 OFFLINE  

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Posted May 19, 2012 - 07:47 AM

hey, just got in. wondering if our set ups are the same. For me I sent roll pin part way down, rolled gear so pin was up then pulled it up/out next to roll pin was another set screw. once these are free; hold pulley and pull out w/shaft attached. gear should be left in box 'free' to just pick up/out...
IMG_6742a.jpg
if your stuff doesn't look like this then I must defer to more learned counsel. hang in there!


I did not have the set screw like you, just the roll pin that held everything together. I have the vertical shaft out, just having issues with the key on the horizontal shaft.

You guys both have the same gear setups (Older Style)

Mark843: Where's the key your trying to get out?
Your gears are a bit worn but are still in good condition.


See the key circled in the pic. I don't want to damage it, but it is really in there good. It's the first one I came across that I can't get out.

key.jpg

Edited by mark843, May 19, 2012 - 07:49 AM.


#38 Newpaws493 OFFLINE  

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Posted May 19, 2012 - 08:02 AM

have you separated u joint from gearbox, and are you saying key is stuck in shaft???

#39 mark843 OFFLINE  

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Posted May 19, 2012 - 08:29 AM

Yes. The u-joint is separated and the key is stuck. If I can get the key out, I can slide the horizontal shaft out of the box.

#40 Newpaws493 OFFLINE  

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Posted May 19, 2012 - 08:34 AM

mine was all greasy and slid out w/ease, is yours dry and wedged against something else?


I remember you mentioning heat, hope you didn't cause material to fuse together somehow, I take it by now you've tried to re-lubricate this problem area...

Edited by Newpaws493, May 19, 2012 - 09:01 AM.


#41 Newpaws493 OFFLINE  

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Posted May 19, 2012 - 09:10 AM

do you have pics of new seals/ gaskets that are going in? my seals are unrecognizable as they came out in pieces..

#42 KennyP ONLINE  

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Posted May 19, 2012 - 09:18 AM

I usually take something softer than the key and tap at one end (with the shaft) on those. Probably rusted in pretty good. Sometimes tapping down on an end will loosen them. The groove is rounded, so you are just rolling it out.
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#43 mark843 OFFLINE  

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Posted May 19, 2012 - 10:58 AM

It does not appear to be rusted but could be on the under side. I am soaking it with pb blaster right now. I did try and tap the end and it would just not slide up like these rounded ones usually do. I hope the pb blaster does the trick. It is boogered up from when I tried to pull it out with vice grips. I will have to file the edges down.

horizontal_shaft_key.jpg

Here is the seal. It was Bolens part number 1185296 and I got 2 SKF 7443 seals at NAPA for about $13. It looks to be the same from comparing them. I used this website to cross reference the seal part numbers.

http://www2.chicago-...okup_457012.htm

mower_gear_box_seal.jpg

Edited by mark843, May 19, 2012 - 10:59 AM.

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#44 Newpaws493 OFFLINE  

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Posted May 19, 2012 - 12:08 PM

wondering why this task is choosing to be such a pain,sorry 'bout that. Looking forward to you getting past it almost as much as you are...thanks for the pics and info, is the gasket available through napa also?

IMG_6841.JPG IMG_6842a.jpg

Edited by Newpaws493, May 19, 2012 - 12:50 PM.

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#45 mark843 OFFLINE  

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Posted May 19, 2012 - 05:22 PM

I finally got the key out. It was a little rusty under there so that must have been the issue. I ended up taking a cold chisel to the end of it and it came out with great persuasion. I need to get a new one, but I think I should be able to get one at Lowes. I got everything cleaned up and put back together with the new seals.

Only the seal are available through NAPA. You have to get the gasket from someone who sells Bolens parts. I just use RTV as I have always had good success with it as long as I clean and prep everything well, but I know some people don't like it. I get nervous with the seals as sometimes I don't have good luck with them though.




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