8999145EN: v1 26/02/2020
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Original instructions (ENGLISH)
Website: www.spearheadmachinery.com
6.3
Basic Machine Controls
Check that the prime mover is equipped to deliver the correct hydraulic flow and pressure for the fitted cutting
unit. Refer to the operator manuals for the fitted cutting unit and the prime mover.
The Twiga Carrier attachment is a very basic system that can be ordered without any additional control of the
attachment, other than turning the hydraulic motor on and off for the blades.
If fitted, the attachment can be angled via a hydraulic ram, to give the operator a certain degree of controllability
of the cut
– this allows the cut to be made either vertically, horizontally, or anywhere in between. Care must be
taken by the operator when angling the attachment, so that the debris thrown is not angled towards road ways or
footpaths, or even towards the driver’s cab.
6.3.1
Machine Pre-Start Check
At every opportunity and before getting into the cab and starting the engine perform the following inspections;
Check that the attachment is free from obstructions especially pieces of wire.
Check that all cutting elements are in good condition and securely attached.
Check that all guards are in their correct place and in good condition (see Safety chapter).
6.3.2
Starting Up Procedure
Cold start up
: When starting the machine for the first time; when the hydraulic oil is cold; and prior to
commencing work, it is essential that the
prime mover’s pumps must
not
be run at working speeds
initially. To avoid cavitation the pumps should be allowed to warm up gradually.
6.3.3
Normal Start Up
CAUTION!
Do not start the cutting attachment while it is under load. Always free the cutting attachment
from any obstructions first.
6.3.4
Transportation To Work Site
Normally the machine will need to be driven to the work site before commencing work. To keep the tractor and
machine width to a minimum it is necessary to fold the arms to the transport position which is illustrated in the
‘Machine general specification’ in Section 1. On Twiga Carrier CF30 models with a slew breakout ram the arms
may also be slewed back at an angle to provide a narrower transport position.
Before driving on the public highway check the following;
All hoses are sufficiently clear of the tyres to prevent contact during bounce and sway on braking,
turning and undulating ground.
It is an essential requirement that when the machine is in the transport position all the isolator valves
are closed.
When transporting with the arms slewed back, keep the first arm vertical as the arms can bounce
forward and damage the tractor cab.
Ensure sufficient ballast is added to the front of the tractor to maintain steerage under bounce
conditions.
Ensure that the rear axle load does not exceed the plated axle limit for the tractor
Ensure the rear tyres are correctly inflated and rated for the axle load.
Ensure all stop, tail and indicator lights (if fitted) are in working order.
Ensure all stop, tail and indicator lights are visible to road users at the rear and fit a trailer bar if
appropriate.
IMPORTANT:
When transporting on the highway, it is the responsibility of the operator to obey all relevant local
highway laws.
IMPORTANT:
Pay due care and attention to the driving conditions and drive accordingly.
DO NOT
travel too
quickly over undulating ground. In transport the arms and cutting attachment represent heavy masses on long
lever arms, thus braking, turning, sway and bounce can magnify forces and induce significant and damaging
