
McHale
F5400
Baler
69
9.10 Bale density gauge
The bale density gauge, is used to indicate the pressure
applied to the back door rams (on the small side of the
rams). When the back door is closed, and no material in the
baling chamber, this is known as ‘chamber pre-charge
pressure’. This pressure will then increase at the end of the
bale forming cycle, due to the oil in the cylinders being
forced into the accumulator. As material begins to fill up the
baling chamber, it pushes the door rams open ever so
slightly. This can cause the gauge to go into the red and this
is normal operation. However, pressure should never go
above 210 bar, if it does consult your
McHale
dealer.
9.11 Setting chamber pre-charge pressure
The bale density gauge is divided up into increments of 20 bar per increment and has
a yellow zone, green zone and a red zone, as a quick reference during machine
operation. The adjustment range to operate in is within the green zone. When baling
drier materials such as straw or hay
McHale
recommend adjusting the door sensor
handle to the hay-straw setting. Chamber pre-charge pressure is set at the door charge
valve, shown below, and is located in front of the platform on the LHS of the machine.
Door charge valve
1.
Remove all unfinished and finished bales from the baling chamber.
2.
Loosen the lock nut on the adjustment screw (A).
3.
Inspect the existing pre-charge pressure by holding the spool to close the back
door for 3 seconds.
4.
If pressure must be increased (gauge in the yellow zone) turn the adjustment
screw (A) clockwise and if the pressure is to be decreased turn the adjustment
screw anti-clockwise.
5.
Continue to inspect the gauge and once the indicator needle is at the desired
setting, tighten the lock nut on the adjustment screw ensuring not to let the
adjustment screw itself rotate and close all protective covers.
CAUTION: Never adjust chamber pre-charge pressure above 170 bar
The chamber pre-charge pressure should never be adjusted above
170 bar pressure in any case, damage to machine components may result!
A