372 XP X-Torq Rebuild

[capablebutton]

At work I've inherited a saw that needed rebuilt onto a new crankcase. I didn't get the full history of the saw, I know it had issues with screws vibrating out of place so much so that a new crankcase was ordered as a potential fix.
Here's my issue. I dismantled all the parts off the old crankcase and got most of them reattached to the new crankcase. As of this morning with the saw mostly assembled I could get it to start and run briefly. I got it to start maybe 8 times in an hour and longest I could get it to run was 20 seconds. FYI this saw has not been ran in 2 years. I figured I would attach the rest of the parts and then make more attempts to getting it to run.

Here's what I perceive to be my main issue. I can "start" the saw currently but the clutch is not on. As soon as I screw/twist my clutch onto the crankshaft I can no longer pull my startercord, nor can I manually move my flywheel. The whole crankshaft seems to freeze. When I take the clutch off again I am able to again move the flywheel/ pull my startercord. I happen to have a spare 372 XP x torq that I've been pulling screws/parts from as needed and I had the same result trying the clutch from my spare 372 on my actual project 372. I am well experienced using saws but am in no way a mechanic. Anyone have any ideas on what I could be doing wrong here?

 

[1hp]

hope this helps. never had to take mine apart.

 

[1hp]

this also.

 

[Woodslasher]

Sounds like you’re missing something. Take a picture of the clutch side of the saw with the clutch off and with the clutch installed and I’ll have a better idea of what’s going on.

 

[HumBurner]

I've had this happen on outboard clutches when the drum won't stay seated in the worm, but with inboard I'm not sure. Will keep an eye on this for your solution.

 

[capablebutton]

Okay gathered some photos. I think I see the potential problem.
Pic 1- This picture is of Saw B ( The retired saw I get parts from when needed for project saw A)
Pic 2- This picture is of Saw C ( The old crankcase which has had its parts moved onto project saw A)
Pic 3- Saw A Under pump pinion
Pic 4- Saw A Clutch on
Pic 5- Saw A Under clutch
Pic 6- Closeup of Saw A
Pic 7- Closeup of Saw A

SO looking at these three "saws" I'm wondering if there's a part to this rebuild I was unaware of. Underneath the oil pump on Saw B and C you can see a thick band around the crankshaft. On the parts list it's just called "sleeve"
503 77 91-01 SLEEVE
503 26 30-19 O-RING
It looks like Saw A does not have this sleeve. I would assume the O-Ring under it is missing as well. If I go one more part in reverse this part is listed as under the O-Ring.
5 585 97 50-01 BALL BEARING
All that being said does anyone have an idea? Looking at the parts diagram I can't quite tell if the ball bearing sits on the outside or inside of the crankcase and I'm unsure if that's a piece I'm missing at the moment or not ( if it sits on the inside I would assume it came preinstalled on this crankcase); however, I'm inclined to believe I am missing the o-ring and sleve.

And IF that were the problem is this something an amateur could take care of - do I need to order these parts - is there a way to remove them from SAW B or C and install on Saw A?
Do you think the problem lies elsewhere?
Thanks for any advice!

 

[Woodslasher]

I'm not sure about the o-ring, but yes you need the sleeve on the one saw. Just grab it with some pliers and pull/twist it off of the parts saw and slide/twist it on saw A.

 

[capablebutton]

If anyone stumbles on this thread the sleeve and o-ring was the cause of the issue! Wish me luck on getting it running