Vaderstad NZ Aggressive NZA 1000 Series, Original Instructions Manual

Page: 38 / 50

Maintenance and service
38 11.07.2011
ver. 2
4.4 Unsynchronized wing folding
Figure 4.8
Applies to NZA 900-1000
In the case of unsynchronized wing folding on NZA 900-1000 cultivators, the probable cause is
binding of the slide inside the valve block. See ”
4.5 Valve block cleaning” on page 38 :
4.5 Valve block cleaning
Figure 4.9
Applies to NZA 900-1000
A Release the pressure in the hydraulic hoses.
B Detach the hydraulic hoses connected to the valve block.
C Unscrew the valve block from the piston support.
D Dismantle the entire valve block and clean all parts in paraffin or similar solvent. Blow dry
with compressed air.
E Lubricate all the internal parts with oil. Check that the slide in the valve moves freely without
binding. Assemble the valve block.
F Clean all hydraulic connections thoroughly before assembly.
G Then mount the valve block on the cultivator.