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02-02-2021, 04:24 PM
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#1
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Senior Member
Newmar Owners Club Freightliner Owners Club
Join Date: Jun 2016
Location: Odessa, Tx.
Posts: 848
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Sloppy turbo shaft
I pulled the cold side boot off of my 3126 turbo charger today while I was cleaning and double checking everything prior to my next adventure.
I can move the compressor wheel L-R and Top to Bottom about 1/10 of an inch.
There was no movement Front to Back. Is that movement normal or have I found something else to spend money on?
__________________
John and Sue from W. Texas
2001 DSDP, 3126B Cat
"the Oilfield PAID me to retire, so I did" :-)
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02-02-2021, 06:03 PM
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#2
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,399
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It would appear that you have contact between the compressor wheel and the housing . Yellow arrow .
Although the shaft does float on pressurize oil when spinning ; I'd say time for an overhaul, while it's still rebuildable.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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02-02-2021, 06:07 PM
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#3
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Senior Member
Foretravel Owners Club
Join Date: Apr 2016
Location: Home is Where WE PARK IT...
Posts: 6,049
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Yup... GOOD CATCH! Time for rebuild or replace..
__________________
Retired truckdriver,
'02 Foretravel... "This Shack will do"
being pushed by an '06 Scion xB
SKP's of Box Elder, South Dakota
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02-02-2021, 06:37 PM
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#4
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,399
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I haven't been able to find the actual Cat spec , for turbo shaft play ; yet ; but common spec have a range of 0.010" to 0.20" . 1/10" = 0.100 so five times the max .
Saw new turbos on E bay for $370 USD for our Cat 3126Bs.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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02-02-2021, 07:12 PM
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#5
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Senior Member
Join Date: Feb 2017
Location: Middle Tn.
Posts: 281
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I replaced the turbo on my C7 a few months ago because I did the same as you. Mine didn't have as much play as yours, .100 is a lot. If you do decide to replace it I went with a new Borg Warner from M&D Distributors. It was the best price I could find on a well known brand turbo.
__________________
2005 Fleetwood Bounder 34H
Freightliner XC Cat C7 300HP
2014 Honda Crv 2001 Wrangler TJ
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02-02-2021, 07:19 PM
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#6
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,746
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Quote:
Originally Posted by Skip426
I haven't been able to find the actual Cat spec , for turbo shaft play ; yet ; but common spec have a range of 0.010" to 0.20" . 1/10" = 0.100 so five times the max .
Saw new turbos on E bay for $370 USD for our Cat 3126Bs.
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Yeah, lucky you!
Think mine would go about $5,000 CAD  !!
__________________
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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02-02-2021, 07:27 PM
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#7
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,399
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Quote:
Originally Posted by 96 Wideglide
Yeah, lucky you!
Think mine would go about $5,000 CAD !! |
You just had to have , Cummins with VGT didn't you , Ben . 
There are some benefits to OLD tech . 
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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02-02-2021, 07:41 PM
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#8
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Senior Member
Join Date: Jan 2005
Posts: 1,447
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Its very difficult to estimate clearance by just wiggling. Many times people over estimate the movement. Its all not unusual for a housing in the turbine to have a stain/coloration around the wheel, hours of sucking air at times moisture (rain doplets) will cause a "stain/ film". Its good you have no end to end play. If you can slightly push the shaft toward the side and it drags on the housing- time to change it. If you shut the engine off at half throttle and listen at the exhaust and hear a tinging as the turbo slows down then it needs be changed. If the housing around the compressor wheel is scraped or gouged time to change it. If you can take a qtip and remove the mark around the compressor then its just a stain. Just a couple things to check before spending the money. Good luck.
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02-02-2021, 07:42 PM
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#9
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,746
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In my own defense, I knew nuthin about diesel engines when I bought this coach!
Thought they were all the same, other than some were higher HP than others!
Thank God I didn't buy one with a 650hp ISX !!
__________________
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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02-02-2021, 08:40 PM
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#10
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Senior Member
Join Date: Dec 2016
Location: So Cal
Posts: 1,374
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There will be a small amount of Play there so as to allow the oil to lubricate the shaft during operation. It does spin at a Very High Rate of RPM's, not to mention up to 1100 degrees of exhaust gas temp. I would call your Cat dealer and ask them what that number would be.
__________________
2000 42' BEAVER MARQUIS AMETHYST w/tag 2 SLIDES CAT C12 425 hp SOLD.........
2014 Tiffin Allegro Bus 37AP
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02-03-2021, 12:40 PM
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#11
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Senior Member
Newmar Owners Club Freightliner Owners Club
Join Date: Jun 2016
Location: Odessa, Tx.
Posts: 848
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Quote:
Originally Posted by Skip426
Saw new turbos on E bay for $370 USD for our Cat 3126Bs.
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I saw those too and I must admit I am tempted while on the other hand I do believe you get what you pay for (most of the time)
Oh the decisions we have to make
__________________
John and Sue from W. Texas
2001 DSDP, 3126B Cat
"the Oilfield PAID me to retire, so I did" :-)
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02-03-2021, 01:17 PM
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#12
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,399
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Quote:
Originally Posted by JNSNWT
I saw those too and I must admit I am tempted while on the other hand I do believe you get what you pay for (most of the time)
Oh the decisions we have to make
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I'm continuing to look for info on a spec for turbine shaft play; I've got a service manual for the 3126E and the turbo inspection section says to replace turbo if the blades are damaged or can be made to contact the housing . No measurement given . The document is WAY too large to post , I'll see if I can extract the pages on inspection. 
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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02-03-2021, 02:00 PM
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#13
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Senior Member
Join Date: Jun 2017
Location: Bryan Tx
Posts: 1,023
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Man, you guys that live in the far North need to start driving south and filling up the trunk with parts when the border opens up  or pay me to drive North. A good smuggler could make a fortune
__________________
“06” Beaver Patriot Thunder , 525 HP C13 Cat
MH 4000 Allison
42 ft Vicksburg, 4 slides
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02-03-2021, 02:12 PM
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#14
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,399
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Quote:
Originally Posted by kenwyatt
Man, you guys that live in the far North need to start driving south and filling up the trunk with parts when the border opens up or pay me to drive North. A good smuggler could make a fortune |
Or spent a lot of time in a Canadian jail .
We're considering establishing a new prison on Baffin Island . No walls , just tents and no protection from the polar bears.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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