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Weil McLain 155CT tightening sequence

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PaulySmitz
PaulySmitz Member Posts: 2
in THE MAIN WALL
Ive been performing the service tune ups on a half dozen or so of these Ultras over the past month on campus where I work.Ive run across one in which the cover has 11 studs total.All the others I’ve used a tourque wrench actually and the W/M tightening sequence.Those others have 13 nuts and the only one with 11 did not have 2 broken or missing,instead of 13.Tune up parts all fit no issues.Burner cone was a little shorter on the Ultra with the 11 cover nuts.Model says 155CT.Tried to find tightening sequencing but wasn’t anywhere,so I didn’t know if anyone ever saw this before

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  • HVACNUT
    HVACNUT Member Posts: 7,214
    That must be a Series 1 or 2 boiler.Series 3 they went to 13 nuts.
  • PaulySmitz
    PaulySmitz Member Posts: 2
    Thank you Thank you! I appreciate the help.It will be useful knowing next time I have to service this or if I find another one here.

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