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240 Brake Booster / M-Cyl Pushrod Adjustment 200

posted by  Mike-C on  Sat Apr 14 15:39 CST 2007
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last visit: Mon Jan 27 11:33 CST 2014
[RELATED]

Good Evening Folks; The son's '88 240 wagong stil has a soft brake pedal. We have replace the master cylinder, the calipers (2) were seized, and pressure blend the system with the diagrame as shown in the Haynes manual. I think the new master cylinder needs the brake pushrod adjusted. I read that a 1-2 MM clearance is required. We unbolted the master, and were able to move it fwd about 4 or so inches for access to the domed head of the pushrod. The rod has a splined type end and the threaded domed heads is a 7MM hex. Now when I try to unscrew the dome head, it will not budge. I don't want to get too brutal with it in case I snap it off. Are they Loctited from the factory and need a little heat to break it loose, or am I just not trying hard enough?

Regards;
Mike Coleman
North Lancaster, Ontario, Canada
1988 240 Stationwagon, 283,000 miles
1992 740 Stationwagon, 179,000 miles
1984 Mercedes 300D, 311,000 miles
1986 Mercedes 300SDL, 192,000 miles
1998 GMC Safari, 396,000 kms






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