Valtra 6550 - Page 1258

1201
Model Code Page
90. Hydraulic system
8. 11. 1990
6000--8750 910 1
Contents
General (Op. no. 910)
Technical data 3...................................................................
Special tools 4....................................................................
Hydraulic diagram 6...............................................................
Hydraulic system, description 9......................................................
Hydraulic power lift 13...............................................................
Three---point l inkage and towing hook 17..............................................
Valves for auxiliary hydraulics 18......................................................
Oil flow regulating valve 22...........................................................
Return oil connection for auxiliary hydraulics 24.........................................
Repair instructions
Pump and pipe system (Op. no. 911)
A. Measuring pressure in low pressure circuit 1........................................
B. Measuring clutch pressures and lubricating pressure 2................................
C. Measuring pressure in high pressure circuit 2.......................................
D. Removing hydraulic pump 3......................................................
E. Fitting hydraulic pump 3.........................................................
Hydraulic power lift (Op. no. 912)
1. Hydraulic lift control valve:
A. Checking shock valve opening pressure 1..........................................
B. Removing control valve 1.........................................................
C. Fitting control valve 1............................................................
D. Reconditioning c ontrol valve 2....................................................
2. Lifting cylinders:
A. Changing lifting cylinder seals 3...................................................
Three---point linkage and towing hook 5..............................................
Adjusting pick---up hitch l ifting links 5.................................................
Checking locking of pick---up hitch 5.................................................