McHale
W2020
Round Bale Wrapper
56
9.5 Releasing cut and hold oil pressure
The cut and hold is held closed by a hydraulic accumulator which is primed as the cut
& hold is opened. If for whatever reason the pressure drops it will prime again the next
time the cut and hold is opened. Anytime work is being carried out on the cut and hold
system, the hydraulic pressure from the accumulator should be released. Remove the
cover panel over the hydraulic control valve using a 13mm spanner.
The cut and hold oil pressure can be released as follows:
1.
Connect hydraulic return line to tractor free flow return connection.
2.
Using a 19mm spanner, loosen locknut.
3.
With a ¼” Allen Key, unscrew valve. The mechanism will pop up slightly and
escaping oil will travel back through the return line. The mechanism can now
be moved upwards and downwards by hand.
4.
Re-tighten the screw in valve. (Do not overtighten) Tightening torque = 6 Nm
5.
Re-tighten the lock nut. (Do not overtighten) Tightening torque = 20 Nm
6.
The cut and hold system will recharge itself during first operation.
WARNING: Only competent operators should carry out this task
It is very important that care is taken in carrying out the following
procedure to protect both the operator and any personnel that may be
nearby. If you are unsure how to carry out this procedure please entrust
the job to your
McHale
dealer.
WARNING: Only competent operators should carry out this task
Extreme caution is required when working on the cut and hold in order to
avoid contact with the knife and mechanism pinch points. Use a crane or
other suitable lifting device to support the cut and hold in an up position.
WARNING: Beware of knives & accumulators during maintenance
The cut and hold system utilises knives and accumulators in order to
function. Beware of serious injury when carrying out any maintenance in
this area. Turn off the tractor and remove the key from the ignition. Wear
protective gloves and clothing, at all times! Also, never carry out any
work on the hydraulic hosing because even when the machine is off,
hosing remains under high pressure due to the
accumulators.
3 & 4
2 & 5