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Foretravel Motorhome Forums => Foretravel Tech Talk => Topic started by: Ldillow on January 05, 2022, 10:59:26 am

Title: A/C idler assembly, M11
Post by: Ldillow on January 05, 2022, 10:59:26 am
I need the bolt that goes thru the bearing. My mechanic messed it up getting it off. Don't seem to get able to find the bolt or a complete assembly. May need to make one?
Larry
Title: Re: A/C idler assembly, M11
Post by: John44 on January 05, 2022, 11:16:12 am
Take the bolt to a fastenal store and see if they can match it,a picture would also help,any chance of having the "mechanic"fix
something he broke.
Title: Re: A/C idler assembly, M11
Post by: craneman on January 05, 2022, 11:18:03 am
Can you post a picture and the wrench size of the bolt? I can't open my engine cover at this time without removing my Roadmaster towing setup.
Title: Re: A/C idler assembly, M11
Post by: Ldillow on January 05, 2022, 08:09:14 pm
The mechanic didn't give me the failed bolt. It's custom because it has a larger shoulder where the pulley rides, but smaller through the bracket.
Thx
Larry
Title: Re: A/C idler assembly, M11
Post by: rbark on January 05, 2022, 08:12:02 pm
Would that not be called a shoulder bolt? Fasten all should have them.
Title: Re: A/C idler assembly, M11
Post by: John44 on January 06, 2022, 03:05:49 am
Maybe someone with the same engine will take a picture.
Title: Re: A/C idler assembly, M11
Post by: Seven7 on January 06, 2022, 11:29:49 am
Is this what you're describing?
Title: Re: A/C idler assembly, M11
Post by: Ldillow on January 06, 2022, 12:07:31 pm
That's it. Need the bolt that goes thru the pully, or the whole thing
Title: Re: A/C idler assembly, M11
Post by: Chuck & Jeannie on January 06, 2022, 12:13:02 pm
Hex head, Shoulder Bolt or Shoulder Screw.  Very common item.  Also available as a socket head (with more choices in size).

I'd find a new mechanic.  JMO

Hex Head Shoulder Bolts and Shoulder Screws - Grainger Industrial Supply (https://www.grainger.com/category/fasteners/socket-screws-and-set-screws/shoulder-screws?attrs=Type%7CHex+Head&filters=attrs)

McMaster-Carr (https://www.mcmaster.com/hex-head-shoulder-screws/)

Socket Shoulder Bolts | Fastenal (https://www.fastenal.com/product/fasteners/sockets/socket-shoulder-bolts/602314?categoryId=602314&level=3&aggregationSection=true&Type=Hex+Head+Shoulder+Bolt&selectedAggregation=Type)

Socket Shoulder Bolts | Fastenal (https://www.fastenal.com/product/fasteners/sockets/socket-shoulder-bolts/602314?categoryId=602314&level=3&aggregationSection=true&Type=Socket+Shoulder+Bolt&selectedAggregation=Type)

Title: Re: A/C idler assembly, M11
Post by: John44 on January 06, 2022, 12:47:24 pm
Take the mechanism in when you do,do you know if it's metric or not,looks like you could just use a bolt and a washer,and if the same guy puts it back together make sure he uses anti seize on the threads and uses a 6 point socket,while you have it apart I
would get a new bearing.
Title: Re: A/C idler assembly, M11
Post by: rbark on January 06, 2022, 12:56:53 pm
Bolt head uses a 7/8" socket. The shoulder is 11/16" and don't forget the washer
Title: Re: A/C idler assembly, M11
Post by: craneman on January 06, 2022, 01:00:43 pm
The bolt shoulder has to be a tight but not pressed fit to the inside of the bearing and the length of the shoulder has to be exact to align the pulley with the air compressor pulley. And as John said replace that bearing. The info from Richard should get you going.
Title: Re: A/C idler assembly, M11
Post by: craneman on January 06, 2022, 01:49:09 pm
Bolt head uses a 7/8" socket. The shoulder is 11/16" and don't forget the washer
Richard, could you try a 1/2" 13 nut on the bolt to verify the thread size and get the diameter of the shoulder? With that information and your previous info one could be made.
Title: Re: A/C idler assembly, M11
Post by: John44 on January 06, 2022, 02:26:15 pm
Another idea,go to a Napa type store or auto AC store for the bearing,they may have a bolt to go with the bearing.
Title: Re: A/C idler assembly, M11
Post by: rbark on January 06, 2022, 05:20:11 pm
Chuck, bolt threads are 7/16"X 20.
 Shoulder is 5/8" Dia.
Title: Re: A/C idler assembly, M11
Post by: craneman on January 06, 2022, 05:27:25 pm
Chuck, bolt threads are 7/16"X 20.
 Shoulder is 5/8" Dia.
I think you mean bolt diameter.
Title: Re: A/C idler assembly, M11
Post by: Ldillow on January 07, 2022, 11:39:03 am
Thx for the info.
Will check Napa and fastenall
Will not use this mechanic again!