W126

W126 350SD 1991 thrown belt

I'm not exactly sure what happened with my car but I've heard it described as a thrown belt, anyway it broke and ripped my power steering pump off and tore off the belt tensioner pulley.
I'm in the process of putting things back together and noticed that I need a new AC compressor. Should I attempt to replace it myself if I have no prior experience with AC and don't want to buy a bunch of expensive tools?
Also, how do you get the high pressure hose off of the power steering pump where it connects to the pump reservoir?

Chassis Model Number

W126

Forums

Diesel Engine Specific Aid

1985 300 SD turbo diesel Auxillary Fan Not Working

n/a Auxillary fan for air conditioning system will not energize. Car overheats when using air conditioning in traffic. Fan is new, fuse C has been checked. climate control is newly rebuilt. Air is cold fan is working on all speeds. Read somewhere that the auxillary fan is controlled by temperature switch at drier. Is this correct? How do I go about diagnosing the problem. Thanks

Chassis Model Number

W126

Forums

Diesel Engine Specific Aid

1983 300SD vacuum diagnosis

Hi, All,

I have isolated a vacuum problem to the red/green plastic line that services (I think) interior switches and servos: with this red/green line attached to its fitting on the vac system, system pressure drops from 45m/g to 15m/g or less with the engine running. When the car is turned OFF, the line holds vacuum (??); when the car is ON, its as if it's open on the other end, bleeding off vacuum (brakes go hard after 2-3 pumps; engine won't shut off if at idle awhile).

Does this behavior suggest a specific component that I should go after?

Thanks in advance!

Chassis Model Number

W126

Forums

Diesel Engine Specific Aid

1985 w126 300sd cental locking system failure to lock

I have posted this question on a few other Mercedes Forums with no assistance. So...I have paid the 30 bucks for hopefully some light to be shed.

I have a strange problem with my central locks.

The problem I am having is that locking any controlling (driver passenger trunk)lock will cause all locks to unlock but it is impossible to lock the doors. I obviously have no leaks.

What I have so far.
I have run the pump on the bench and if I ground any of the 3 pins the pump pulls untill the vac switch makes. Then if I apply 12v to a pin the pump pushes until the press switch makes. This seems to make sense. Keep in mind I did not test the pump with a constant 12v on any pins and I will try that later today.

I also tested the wiring in the car and all is correct.

Chassis Model Number

W126

Forums

Body and Interior Specific Aid

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