I have 3 Linde H35Ds with VW turbo diesel engines, 2 with brand new turbos, and one with a brand new engine, (thanks to Linde for supplying with a new engine after just 3200 hrs).
The problem I am getting is that 2 of these lift just can not obtain their full driving speed as they should (maybe 35% if were lucky)

ECU configured correctly
No error codes
Complet hydrolic pressure check - all within specs
New ECU - no difference
New turbos - no difference
New fuel injectors - nothing
New speed pedal potentiameter sensor - nothing
Complete fuel, oil, air filter and hydrolic oil change - nothing
Linde certified mechanic - stumpped (no help)

The only decernable difference with my only one that is ok, is that the swash-plate solinoide current at top speed is lower on the faulty lifts than on my good one.

Has any one had this problem - and if so please tell me what to do. My big busy season is hitting me hard and I have had to hire a new driver and I have had to rent a forth lift to help.