MuncyBob
Platinum Member
......and now this happens!
Overheated Robin EH72-FI (28 hp) in PT-425 solved
- Thread starter Kent
- Start date
J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,928
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
What kind of stress did you put on that motor shaft?
Your two options are .
Rebuild the motor with new shaft.
Replace with new motor.
Your two options are .
Rebuild the motor with new shaft.
Replace with new motor.
MuncyBob
Platinum Member
Nothing out of the usual. I do run it on a lot of sloped/hillside areas(it sits now precariously on a hillside) and make turns on that would stress the shaft, but I thought the PT should be able to handle that. I'll probably be calling Terry to order a new motor and when I have time look at rebuilding the old one. Any resources/step by step instructions to rebuild would be appreciated.
MuncyBob
Platinum Member
Well, good news(sorta)....instead of buying a new pump Terry in Tazewell will put in a new shaft and rebuild for considerably less...just means more down time waiting for it to come back. He also suggest I get an impact wrench to get it back onto the shaft...said hand tightening the nut will not be good enough....I've been meaning to buy one anyhow.
MossRoad
Super Moderator
- Joined
- Aug 31, 2001
- Messages
- 60,238
- Location
- South Bend, Indiana (near)
- Tractor
- Power Trac PT425 2001 Model Year
Ouch! Sorry for your troubles. How many hours on the machine?
MuncyBob
Platinum Member
Just over 800.
MuncyBob
Platinum Member
Finally got the Robin exhaust installed. I have several feet left over of the Walker flex pipe..so if anybody needs any.
MuncyBob
Platinum Member
I ran the 422 last night for 1.5 hours with the 48" grass cutter going at full throttle. I STRONGLY encourage anybody with the Robin engine and stock PT exhaust to consider replacing with the Robin exhaust. Sure it will cost ya a few bucks(mine was $190) and a bit of time fitting it to the PT but man, what a difference! As stated earlier in this thread, the tub temps are way down and I was pleasantly surprised that I also gained a few HP as was evident when mowing up some hills. Previously I would either have to back up some of my steeper hills or find another approach but now I can go right up the slopes except for my steepest one. I also am not getting the backfire at shut down either.
I really hope this has solved my hot temps issue, just wish I had done this many hours ago and may have saved me a rebuild last winter!
I really hope this has solved my hot temps issue, just wish I had done this many hours ago and may have saved me a rebuild last winter!
ponytug
Super Member
Congratulations!!! That is a wonderful.
I'm always impressed at how finely balanced air cooled gasoline engines are.
Thanks for sharing this.
All the best,
Peter
I'm always impressed at how finely balanced air cooled gasoline engines are.
Thanks for sharing this.
All the best,
Peter
cqaigy2
Super Member
Thanks for the report! I may do that if or when my nephew's custom exhaust gets ripped off on something. 