BenzWorld Junior Member
Date registered: Aug 2004
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
RE: HELP! P/S Pump on 75 300D
I just checked my two 300D motors, and the Chilton's Manual. I have 3 bolts: 2 on the bracket side facing the radiator, one slightly above and to the left of pulley, and the other slightly below and to the right of the pulley; the third bolt is on the rear of the bracket. All 3 are in slotted holes, allowing the PS unit to adjust about an inch or so. If all three bolts are sufficiently loose, that should be enough to allow you to remove the belt. I have done this several times. YOu dont need to remove the pulley.
BTW, MB only made this motor (3005cc) for 2 years ('75-'76). For 1977, the W115 chassis was discontinued, and the 300D appeared in the W123 chassis. Although basically the same motor, it was modified to 2995cc, and the position of the power steering unit changed, among other things. So the post from the 1977 300D above does not apply to your motor.
Good luck. Let me know how you make out.
1975 W115 300D
Spare Motor: from 1976 W115 300D