I am not really too familiar with the 403... but I did not think it is that far off then the 455.
http://www.gmcmhphotos.com/photos/power-level-valve-fitting/p66388-power-steering-pump-mount.html
the powersteering and A/C brackets are overtly complicated. Power steering on my 455, has a few bolts that have to be loosened up, and I prefer
to have the wheel well liner, and I get some from there, I think one from below, and then the actual tighting I do from the engine compartment. I
have a craftsman long prybar, that I cut the flat end off of. it ends up being a square end that barely fits between the pully and bracket, but it
catches a flat notch that sticks out from the power steering bracket, and a flat spot on the nose of the power steering pump. basically straight
down between the thermostat housing and the A/C. it is a tight fit, but when it fits- it is perfect, and does not take much to pull on the bar to
set the belt. the bolt I lock it down with is a deep well 9/16" socket that goes through a hole in pully. Then you have to get under, and to the
side to get all the other bolts that have to be loose for pump to move.
see #10 washer in that diagram. that is needed, and make sure it is in place.
I have not worked on the A/C enough to remember that one, but again, taking out the wheel well liner makes seeing and doing on that easier as well.
here is a photo of that:
http://www.gmcmhphotos.com/photos/miscellaneous-stuff/p51610-some-1978-iso-drawings-from-the-manuals.html
--
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
http://www.gmcmhphotos.com/photos/power-level-valve-fitting/p66388-power-steering-pump-mount.html
the powersteering and A/C brackets are overtly complicated. Power steering on my 455, has a few bolts that have to be loosened up, and I prefer
to have the wheel well liner, and I get some from there, I think one from below, and then the actual tighting I do from the engine compartment. I
have a craftsman long prybar, that I cut the flat end off of. it ends up being a square end that barely fits between the pully and bracket, but it
catches a flat notch that sticks out from the power steering bracket, and a flat spot on the nose of the power steering pump. basically straight
down between the thermostat housing and the A/C. it is a tight fit, but when it fits- it is perfect, and does not take much to pull on the bar to
set the belt. the bolt I lock it down with is a deep well 9/16" socket that goes through a hole in pully. Then you have to get under, and to the
side to get all the other bolts that have to be loose for pump to move.
see #10 washer in that diagram. that is needed, and make sure it is in place.
I have not worked on the A/C enough to remember that one, but again, taking out the wheel well liner makes seeing and doing on that easier as well.
here is a photo of that:
http://www.gmcmhphotos.com/photos/miscellaneous-stuff/p51610-some-1978-iso-drawings-from-the-manuals.html
--
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
