McHale F5500 - Bale density gauge; Setting chamber pre-charge pressure

McHale F5500 Baler
92
If the above conditions are not met, then adjust using the following procedure:
The brake should be set so that it is as close to the disc, as possible, without causing
any drag. Tighten the M6 nut, holding the screwdriver in screw slot to stop it turning.
After performing an adjustment, carry out above checks at A and B to ensure brake is
fully off, at step A and fully on, at step B. If not, repeat adjustment C until conditions at
A and B are satisfied. A small movement of the brake arm should apply the brake fully.
Finally, re-tension the inner belt.
9.12 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.
9.13 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.
C. Adjustment: Insert a flat blade
screwdriver in the screw slot and use a
10 mm spanner to loosen off the M6 nut,
as shown. Then using the screwdriver turn
the screw clockwise to tighten (apply the
brake sooner) and anti-clockwise to
loosen (back the brake off). Adjust the
brake using only a ¼ turn at a time, as it is
quite sensitive.