p38a radius arm bushes

Had one on totally disintergrate on my DT today !

according to the workshop manual the air suspension system needs to be
decompressed using text book before removing the arms obvoiusly I dont have
text book so I am asking myself why this is so ? surely I can chock the
wheels ( will be on a four post lift ) and support the chassis to stop it
all moving ?
will I need to have the whole thing re-calibrated after ?

any advise appreciated as I need to get to a wedding this weekend .

>>>>> "cg1" == cg1 <[email protected]> writes:
cg1> Had one on totally disintergrate on my DT today !

Yow! That sounds unusual....

cg1> according to the workshop manual the air suspension system
cg1> needs to be decompressed using text book before removing the
cg1> arms obvoiusly I dont have text book so I am asking myself
cg1> why this is so ? surely I can chock the wheels ( will be on a
cg1> four post lift ) and support the chassis to stop it all
cg1> moving ? will I need to have the whole thing re-calibrated
cg1> after ?

Drop the car to access level first, then lift the chassis keeping the
wheels on the group (or on the ramp), and either a) keep a door open
or b) better still, disconnect the battery negative lead to ensure the
EAS doesn't try to move while you're working.

That will minimise the pressure in the EAS without depresurising -
there is NO guaranteed safe way to depressurise the springs without a
diagnostic system.

Don't lift the chassis too high - if it starts lifting the wheels,
then the entire weight of the axle is being supported by the dampers
and the clips holding the air springs in place. Not a good situation.

Andy


--
Andy Cunningham -- www.vehicle-diagnostics.co.uk
"Hi ho! Yow! I'm surfing ARPANET!", "Enormous hairy pig with fan" and
"A rough whimper of insanity" are all anagrams for "The Information
Superhighway".

"AndyC the WB" <[email protected]> wrote in message
news:[email protected]...
>>>>>> "cg1" == cg1 <[email protected]> writes:
> cg1> Had one on totally disintergrate on my DT today !
>
> Yow! That sounds unusual....
>
> cg1> according to the workshop manual the air suspension system
> cg1> needs to be decompressed using text book before removing the
> cg1> arms obvoiusly I dont have text book so I am asking myself
> cg1> why this is so ? surely I can chock the wheels ( will be on a
> cg1> four post lift ) and support the chassis to stop it all
> cg1> moving ? will I need to have the whole thing re-calibrated
> cg1> after ?
>
> Drop the car to access level first, then lift the chassis keeping the
> wheels on the group (or on the ramp), and either a) keep a door open
> or b) better still, disconnect the battery negative lead to ensure the
> EAS doesn't try to move while you're working.
>
> That will minimise the pressure in the EAS without depresurising -
> there is NO guaranteed safe way to depressurise the springs without a
> diagnostic system.
>
> Don't lift the chassis too high - if it starts lifting the wheels,
> then the entire weight of the axle is being supported by the dampers
> and the clips holding the air springs in place. Not a good situation.
>
> Andy
>
thanks ! thats basicly what I have done but I have drained the air tank too
( its got a proper bleed screw at one end WOW )

only thing that worrys me now is if disconnecting the height sensors will
mean re-calibrating but I cant see why it should .

>>>>> "cg1" == <[email protected]> writes:

cg1> thanks ! thats basicly what I have done but I have drained
cg1> the air tank too ( its got a proper bleed screw at one end
cg1> WOW )

Gives an added safety margin, I guess. Note that this DOESN'T
depressurise the springs!

cg1> only thing that worrys me now is if disconnecting the height
cg1> sensors will mean re-calibrating but I cant see why it should

Should be OK. Be very careful to connect the arms in the same way
otherwise it will get very confused.

Andy




--
Andy Cunningham -- www.vehicle-diagnostics.co.uk
I regret to say that we of the FBI are powerless to act in cases of
oral-genital intimacy, unless it has in some way obstructed
interstate commerce. --J. Edgar Hoover

"AndyC the WB" <[email protected]> wrote in message
news:[email protected]...
>>>>>> "cg1" == <[email protected]> writes:
>
> cg1> thanks ! thats basicly what I have done but I have drained
> cg1> the air tank too ( its got a proper bleed screw at one end
> cg1> WOW )
>
> Gives an added safety margin, I guess. Note that this DOESN'T
> depressurise the springs!
>
> cg1> only thing that worrys me now is if disconnecting the height
> cg1> sensors will mean re-calibrating but I cant see why it should
>
> Should be OK. Be very careful to connect the arms in the same way
> otherwise it will get very confused.
>
> Andy

all done aswell as new shocks , steering damper, pan rod bushes drop arm
etc there is nothing less to change
but some vibration is still felt through steering so I had the tracking
and balancing redone but its still there , do I need to adjust the steering
box and if so how hard is it ?