Spearhead TWIGA 120, Handbook

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Spearhead TWIGA
120
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FITTING THE MACHINE FITTING THE MACHINE FITTING THE MACHINE FITTING THE MACHINE
Attachment to Tractor
Attachment of the machine to the tractor should be performed on a firm level site.
The procedure for attachment is as follows:
• Unbolt the upper halves of the yoke and fit them either side of the tractors top hitch
bracket with the ¾" UNF nut and bolt provided. If the tractor has only one top hitch position
the bolt will replace the existing top hitch pin. If more than one location is available mount
the yokes through an alternative position as it will make it easier to put the machine on and
off the tractor. Do not tighten the nut at this stage.
• Attach the machine to the three point linkage and raise to give 200 - 250mm (8” – 9”)
clearance under the lowest part of the frame.
• Re-bolt the yoke halves together - it may be necessary to raise or lower the machine on
the linkage to achieve whole alignment.
• Adjust the top link until the main frame is vertical.
• Tighten the nut and bolt securing the upper yoke just enough to eliminate any sideways
movement. Do not over tighten and squeeze the top hitch brackets.
• Tighten the check chains/stabiliser bars, release its holding chain and position the control
valve to suit both tractor and operator - this is achieved by a combination of height
adjustments in the mounting bar abutment and by bending the mounting bar itself.
• Turn the parking leg upside down and pin in position.
• Couple up the hydraulics – see below.
Coupling up Hydraulics
Consult the tractor’s handbook for correct installation of the supply and return connection.
Note: If the tractor is equipped with one or more quick release hydraulic couplings the
TWIGA 120 supply and return hydraulic components may need to be re-arranged to
facilitate fitting to a variety of tractors.
The motor drain line must always be returned to a low pressure position i.e. transmission
filler plug. Where no specific return connection is available and the transmission filler plug
has to be used, an adaptor must be fitted, which, then allows the motor return and the
motor drain to utilise a common return location. Run up the machine and operate through
its complete range of movements including the operation of the cutterbar drive. Check the
tractors transmission oil level and top up if necessary. You are now ready to proceed to
the worksite.
TWIGA 120 – Hydraulic Connections