I have an 8145. Can anyone explain all the PTO controls? Also ideas on this issue: Transmission oil was low (had oil leaking out of rear wheel which might have been the problem?) and I lost 3PL lift. But Ext (Front end loader) still worked. Topped up transmission (filler below seat) (took about 6 litres). I can now lift 3PL but only by holding external hydraulics lever up or down. Is there a need to 'bleed' the internal circuit and how would I do that?