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ewalberg
Expert
Date registered: Apr 2006
Location: Past: San Francisco. Present: Germany
Vehicle(s): 2000 g500
Posts: 1887
| axle tube heating up...
OK, so the bearings are all back in place and seem to be doing fine.
HOWEVER... After driving around for a short bit, my right side axle tube warms up. I was feeling the steering knuckles becuase i read if they warm up it's a sign that the bearings are over tightened... we'll they feel fine, and my left side swivel ball and axle tube are cool as can be, but the right side seems to be heating up... seems to be right at the joint between the swivel and the axle tube. The only thing there is the inner seal and a little bushing that's behind the inner seal.
Any speculation on what could cause heating of the axle tube? The only thing could think of is friction against that bushing behind the inner seal. I'm almost positive i kept my king pin shims in order, but if not could that cause the problem? Anybody know the process for checking their setting? I kinda felt like the right side king pin shims might not have been done well from the factory based on how far up the upper plate moved just by loosening the bolts.
THanks in advance... so close... |
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dai
Expert
Date registered: Apr 2006
Location: Oregon USA
Vehicle(s): 300GD 300TD BMW R100RS Landini 80F
Posts: 2110
| Re: axle tube heating up...
Erik, you will need special tool "Split ring 460 589 0 1 63 00. This is inserted behind the C/V and centers the shaft in the axle bore. The axle shaft is installed without the tapered bearings and then the upper and lower kingpin cap are installed without shims. You measure with feeler gauges to determine the shim thickness needed and then use shims top and bottom that are 0.15mm thinner to achieve preload of 0.3mm.
A manual would be very helpfull to you. It is all in there and they pay for themselves with the first use. Harald's are excellent. There isn't anything from MB for my truck.
There may be a quick and dirty way of fixing your problem by installing a shim in the top of your tight one that is seems to be loading your shaft down. Warren is the the person to contact and will probably have a solution that is not so daunting.
-Dai |
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hipine
Date registered: Jul 2006
Location: US, CO, Bailey
Vehicle(s): 460 1980 280GE w. 617A
| RE: axle tube heating up...
Best bet is to have a look inside. You'll know pretty quick if there's enough interference there to cause heat. Since you've been in there recently, it should come apart pretty quick. Worth the peace of mind. If you find a problem, you'll need to replace the bushing and then go through the bit Dai describes. It may be laid out in factory manual scans under front axle service on ClubGwagen. -Dave G. |
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AlanMcR
Expert
Date registered: Apr 2006
Location: US, CA, Los Altos
Vehicle(s): G300DT E300DT 230SL
Posts: 3500
| RE: axle tube heating up...
hipine - 10/16/2006 8:00 AM
Best bet is to have a look inside. You'll know pretty quick if there's enough interference there to cause heat. Since you've been in there recently, it should come apart pretty quick. Worth the peace of mind. If you find a problem, you'll need to replace the bushing and then go through the bit Dai describes. It may be laid out in factory manual scans under front axle service on ClubGwagen. -Dave G.
I've got to agree with Dave on this. The only way is to open it up and find out. Maybe one of the king pin bearings didn't fully seat? |
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Warren T
Extreme Veteran
Date registered: May 2006
Location: Montreal
Vehicle(s): 230GE,300GD,300D
Posts: 519
| Re: axle tube heating up...
The axle must be instaled With bearings.A plastic ring can be
machined to replace special tool. If shims are mixed up this
setting is a must, or seal will leak and CV joint will be under
pressure from axle riding on axle bushing BAD....
Warren |
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dai
Expert
Date registered: Apr 2006
Location: Oregon USA
Vehicle(s): 300GD 300TD BMW R100RS Landini 80F
Posts: 2110
| Re: axle tube heating up...
Alan, excellent suggestion about the possibility that a bearing is not seated properly. My set of comments were based on the instructions in the service manual. If anyone has the special tool I have access to several CNC shops and could produce some for those interested. Warren, is the tool basically a ring that just fits over the shaft on the inboard side with a taper to center into the bushing? My understanding is that if you need to replace the joint housing you face the centering procedure.
-Dai |
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ewalberg
Expert
Date registered: Apr 2006
Location: Past: San Francisco. Present: Germany
Vehicle(s): 2000 g500
Posts: 1887
| RE: axle tube heating up...
WO-HOOO!!!! YES! I switched a particularly thick shim whose origin was questionable, from top to bottom, and everything seemed more on center during re-tensioning of the king pin bolts. Got the rotor, caliper, and tire back on and it's all running cool now! I'm think i'm in the clear other than checking the tension on the bearings after some time. I barely drove on it with the shim in the wrong place so i don't think it's worth tearing into again. RELIEF! |
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