Hi please can someone help me! I've been having problems with a Lansing Linde E14 its about 17 years old serial number starts E322, basically the hydraulic oil is full of air everytime its used the tank is full of frothy hydraulic oil. Obviously its pulling in air on the suction side somewhere but i can't find it! i have in the past changed the steer motor and pump, i recently changed the main lift pump, all the clamps, fittings to pumps and clips are tight, but its still full of air, i have bled the rams but still no good. Anyone out there able to help please.