won`t bring box below 53 deg

suction 34#
Head 185# 4 deg drop across coil 53-49
evap coil 46 deg
suct line @ evap 50 deg
liq line @ evap 72 deg

Russell cond RC11/2H12 mod
89F10374 ser

Russell evap AE36-140
010521

is this unit overcharged

R-12 system box 12x8x7

any suggestion???????

[Edited by dandyme on 06-15-2004 at 11:54 PM]