McHale Orbital - Which hydraulic system is used?

McHale Orbital Round Bale Wrapper
35
Load sensing without ‘Power Beyond’ fitted
There are two further variations on this system as described below. This will only affect
the wrapper setup, when a ‘Power Beyond’ connection is not available:
1. Load-sensing (not compensated): This is the more basic of the two versions
usually found on the ‘economy’ tractor models. The disadvantage of this
system is that it does not maintain the set oil flow to the wrapper when another
auxiliary valve is operated. It will cause the tractor to send all the oil flow to the
wrapper, which results in inadequate oil pressure.
2. Load-sensing (compensated): This is the better option as it allows for each
tractor auxiliary valve, to be set to deliver a fixed amount of oil, and providing
that the total amount of oil required does not exceed the max oil flow of the
tractor, 2, 3 or even 4 auxiliary valves can be used at the same time.
Once the correct tractor system is identified, use the map in the next section, to select
the best setup for the machine.
5.6 Which hydraulic system is used?
1. Open-centre
Set as open-centre
(default factory setting)
2. Closed-centre
Set as closed-centre /
load-sensing
3. Load-sensing
Does the tractor have a
‘Power Beyond’ &
‘Sensing Line’
connection fitted?
Yes
No
Contact your
tractor dealer
to get ‘Power
Beyond’
option fitted
Set as closed-
centre / load-
sensing
SET-UP (A)
1. Plug feed line into
auxiliary spool output
ensuring it can supply an
oil flow of at least 30 l/min
@180 bar.
2. Plug return line into
free-flow return.
SET-UP (B)
1. Plug feed line into
auxiliary spool output
ensuring it can supply an
oil flow of at least 30 l/min
@180 bar.
2. Plug return line into
free-flow return.
SET-UP (C)
1. Plug feed line into power beyond output.
2. Plug return line into free-flow return.
3. Plug sensing-line hose into ‘Power Beyond’
connection on tractor.