McHale 991B
Round Bale Wrapper
27
5.2 Hydraulic spool valve setup
The wrapper hydraulic valve must be set up in accordance with the type of hydraulic
system on the tractor, that is being used. Check the tractor manual or with your dealer
if you are unsure of which system is used on the tractor. If in any doubt after checking,
use open centre settings as this will not damage the tractors hydraulics.The valve may
be set up in two different ways:
1.
Plug A (manual, part no CVA06003) (electronic, part no CVA06004)
This plug is used for both
open centre
and
load sensing
hydraulic systems.
The hydraulic valve is set up to this specification when leaving the factory.
When using load sensing hydraulics, always set the tractor oil flow to achieve
30 rpm on the table, using the flow control on the tractors auxiliary valve.
2.
Plug B (part no CVA06001)
This setting is used for
closed centre
hydraulic systems.
Changing from plug A to plug B (Manual & Electronic valves & BJS valves):
(1)
Remove plug A and replace with closed centre plug B
(2)
Tighten the relief valve fully
Changing from plug B to plug A (Manual & Electronic valves & BJS valves):
(3)
Remove the closed centre plug B and replace with plug A
(4)
Using a pressure gauge, set the relief valve to 250 bar
991 B & 991 BC valve
991 BE valve
991 BJS (Joystick) valve
