4 - Sprayer set-up
33
Open centre hydraulic block (optional)
If the tractor's hydraulic system is of the open centre or load sensing
type, an open centre hydraulic block is required.
The valve (1) on the side of the block is factory set for an open centre. But
if the tractor has a closed centre (and/or load sensing) system, this valve
must be screwed all the way in.
Some tractors can use load sensing (LS) without connecting an external
load sensor. But if the optimum load control pressure is not reached, an
external load sensor (3) must be fitted. Ask your tractor dealer for the
correct setting and connection.
±
WARNING! The valves must be adjusted according to the model
of tractor before you operate the hydraulics. If you do not know
what type of hydraulic system your tractor has, contact your
dealer.
Settings table for the valves on the block:
*if the tractor requires a pressure discharge, consult your tractor dealer.
±
WARNING! Always check that the valve (1) to select open centre/closed centre is indeed fully screwed in or
unscrewed. Failure to do this could result in vital components in the tractor's hydraulic pump being damaged.
±
WARNING! It is essential that the load sensor connectors are always kept perfectly clean. Failure to ensure that this is
the case could result in impurities entering the pump and damaging its components.
Valve no. 1 2 3 (LS port )
Open centre Unscrewed Unscrewed Free
Closed centre Screwed Screwed Free
Load sensing (LS) Screwed Unscrewed Connected
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