144 Solas Mag Pump rebuild help!

Nicotheskiguy

Nicotheskiguy

Location
Georgia
I got the bearings and seals seated and in place and got the shaft to slide in place using the hot cold method, after rebuild and spinning the impeller back on I found its not hard to turn spin but you can feel the resistance of the grease. Is this normal? I fear it’ll get tighter and seize as the impeller tightens under load

Does the order in which the seals are installed matter? I know I have the orientation correct however the order is switched according to what I found on here. (Flat metal down first then the spring facing out on top of that and I have my metal washer last)

first pump rebuild sorry for the beginner questions!
 

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kevbo

kevbo

Location
dfw
it takes liquid nitrogen on the bearings, a hot stator, and a very swift installation to work with steel on steel fits. It is often impossible to get the shaft in fast enough before it warms and jets stuck. An aluminum stator just needs 200 degrees or so depending on how tight the final fit is. I suggest pushing a bearing in at room temp to see if its too tight. I have had to slightly sand Solas stators to lighten up the pressure.
 
S

Storbeck

Location
Minnesota
I've installed bearings in a solas stator with just heat, I didn't even freeze the bearings, also installed the bearings on the shaft with just heat. I don't remember exactly what temperature I used, probably around 300 degrees, maybe 250. I have even removed the bearing/shaft using just heat, the thermal expansion of the stainless is higher than the carbon steel of the bearing race, but that took more heat, I think around 400 deg. I stick the thing in the oven and go do something else so it is in there for a long time, over an hour, I don't know if it takes that long but it doesn't hurt to be in there for a longer time than necessary.
 
Alexwissler507

Alexwissler507

Location
Pottstown, PA
I did mine by hand on my 148 solas. I just pull washer / seals and turn pump shaft side down. Piece of wood on ground - one good smack and it popped apart. Bearings all but dropped in place as is. I struggled way more doing my oem 144 pump vs the solas 148.
 
Alexwissler507

Alexwissler507

Location
Pottstown, PA
I am interested to hear other peoples methods for getting them apart when they are stuck? Heat or cold? Or just brute force on the shop press? Would be hard to just heat the stator with torch where bearing seats & not get the bearing hot as well. The only time I cracked a stator was using my shop press - I think that is why brapperdoodle - if you are only using heat / cold and hand force in theory you shouldn’t be able to damage anything.
I cracked that stator attempting to press out a salty stuck bearing from a 144 oem housing. The inner “lip” broke off with the bearing as it pushed through stator :(
 
kevbo

kevbo

Location
dfw
Aluminum expands more than steel so heating a stock stator will always make it loose. Some bearing/pump combos can be tighter than others so its always a good idea to measure everything up front or you can end up with a stuck/ruined bearing. I had to make custom mandrels in order to press them in straight when cold and tight.
 
MADMAT

MADMAT

Location
Ohio
After all these years of riding I am finally doing my first ever self pump and midshaft rebuild and it sucks! I hate it and will be sending them back out again next time! LOL.
 
MADMAT

MADMAT

Location
Ohio
OK feeling better now with a proper set up.....I guess I need to be able to this quickly and easily from here on out....
20210928_160422.jpg
 
MADMAT

MADMAT

Location
Ohio
Midshaft question: Do the clips fit snug against the bearing or is there a tiny gap?
 
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