McHale Fusion 2 - Bale Density Valve Operation; Setting Chamber Pre-charge Pressure

McHale Fusion 2 hydraulic systems overview section
12-10
McHale Fusion 2 round baler wrapper technical service manual
Issue 1: 0208
12.7.1 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. When baling drier materials such as straw or hay McHale
recommend setting the chamber pre-charge pressure between 70 and 110 bar
pressure. When baling wetter materials such as grass for silage a pressure of
between 110 and 160 bar is recommended. Chamber pre-charge pressure is
set at the door charge valve, illustrated as A in 12.8, and is located in the
hydraulic section (inside the front right door panel) by following the below
procedure.
Caution: The chamber pre-charge pressure should never be adjusted above
160 bar pressure in any case, damage to machine components may
result!
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 chamber close
button, while in “manual” mode, on the control box for 3 seconds,
4. If pressure must be increased (gauge in the yellow zone, or if there is a
change in the material being baled i.e. dry to wet etc., gauge in the green
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.
Additional information on how to
- Check the Chamber door accumulator, please refer to section 10.3
- Check the Chamber door holding pressure, please refer to section 12.7.3
- Trouble shooting procedures for the Chamber door, please refer to section
14.6 & 14.7.
12.7 Bale density valve
B
A
C
A: Density control handle
B: Chamber accumulator
C: Check valve