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  #16  
Old 06-27-2007, 12:10 AM
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Quote:
Originally Posted by groovinola View Post
Just an fyi from the infamous pdf file 40-310 (not available on the 123 service manual library disc). "t-sedans standard version [includes 123.193] with normal additional load (permissible rear axle load 1150/1155 kg or 1195/1200 kg) = [2535/2546 lbs or 2634/2645].

depending on the tongue weight of your trailer (plus your 1900 lbs) you are pushing it. i always wondered about towing on the back of my wagon. i was told it was very taxing on the transmission. good luck getting home and safe travels.

peace,
woody
The 1900lbs included people, gear, trailer load and weight of trailer so if I understand your numbers correctly, I was under the permissible load limit. More on that later.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #17  
Old 06-27-2007, 12:26 AM
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Join Date: Jan 2002
Posts: 18,350
Plan worked. Made it home. Total cost of labor(took 3 1/2 hrs), two quarts of power steering fluid and 2 copper washers: $77. It would cost that much for a Mercedes dealership service manager to cast his gaze upon the vehicle to determine whether he wanted to spend time on it. Do you think the Mercedes road service would have delivered some SLS fluid 100 miles from the nearest town?

I've learned some things. One is that it does not appear that the high pressure hose is constantly pressurized at the same rate. I think the pressure increases when the valve in the rear calls for the rear to be raised/lowered. If it's not calling for effort, I think the pump is just recirculating at a lower pressure.
I had some heavy truck inner tube and hose clamps along on my rafting oars. I think I probably could have cobbled up a leak repair good enough to get home as long as the SLS was mainly just recirculating.
I think I had a very minor leak until I started to drive away from the river trip take out at Clay Hills Crossing. It is 11 miles of very rough desert dirt road that goes thru dozens of dry washes, each of which is a sharp dip into it and a steep climb out. I think when the car reached the top and the trailer was still in the dip, it was putting additional load on the back, making the SLS call for more levelling action. This increased the pressure load on the line far more than the normal load experienced driving down a relatively smooth road. The leak became obvious shortly after completing the 11 miles. The lesson to be learned from this is that checking for a leak in the SLS requires putting a good load on the system. I had smelled something a few times over the last few weeks but every time I had looked in the engine compartment I could not detect a problem. I now think I was smelling some burning hydraulic fluid being blown back onto the manifold from a very small leak that was occurring when the system was under load.
The hose failed about 12 inches or so from the fitting on the pump, close to the engine. I think this is where the hose is probably stressed the most since it is closest to the engine heat. It is useful to know that (at least on mine) that section can be cut out, the fitting reattached and the hose remain useful, at least for a period of time.

Thanks again for all the help. Good to know the Glenwood connection. We just went flying thru.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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