Hi Gremlin second attempt to post first one was lengthy and didnt launch 1 ..Servo Rams are anchored to bracket with a spherical bearing ....it could be floggged out ...Valve under T Bar is a Pilot control valve ....it tells the servo rams what to do ..IE, Fwd Rev Left Right ..It activates the Pintel shaft in pump ..2 Front wheel motors drive rear wheel hub via a chain thru chain case ...if your machine travels forward ok then i doubt the problem is there .Chain case takes about 5 litres HD gear oil Diff oil each side .. FYI Dont take the round plate off behind rear wheel ....it will dump all hydraulic out ..There is a round plate between wheels ,,,thats where i check and renew oil thru there .....Bucket control valve is a real B to get out and work on ...Reattaching the hoses when they are old is a real HEAD F .....I;M happy for you to contact Tazza and get my Email add .can send photos that way cant seem to do it here ...All the Best