Laski TRENCHER TR 120H, Operating Instructions Manual

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Trencher TR 120 H
10
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Should the chain bar be in full depth of 1200 mm, it is theoretically possible
that a stone up to 220 mm may pass between the auger and the machine frame.
In lower depth this theoretical size may be even 290 mm. However, in field
conditions, even a 60 mm stone may get jammed between the outer auger edge
and the machine frame. This implies that trouble-free stone passage through
the auger is in fact an accidental event. Based on it, the stone size that surely
does not get stuck is about 50 mm.
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In the hydraulic distributor for the chain and the auger drive there is an in-built
check valve preset to 185 bar. Should the stone get stuck in the auger or block
the working chain, this check valve turns on and the auger with the chain will
stop. The operator should immediately turn off the auger and the chain drive
by means of a control lever on the distributor, stop the travel gear or
eventually lift up the chain bar and remove the blocked stone.

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to stop trenching immediately if he hears any strange noises or vibrations that
may result from contact of the cutting chain with undesirable objects bringing
usually damage of the chain. Turn the machine off and first remove these
objects.
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to respect all work safety instructions.
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to check up functions of all controls and safety elements before putting the
machine into operation,
 While working, wear always personal protective equipment - protecting shield
or goggles, protective gloves, working boots and working clothes properly
buttoned.
 Avoid wearing free parts, such as ties, scarves and shawls, belts, jewellery etc.
In case of longer hairs use always a proper head piece. Otherwise, such a
person is not allowed to operate this machine.
- This manual describes also some common troubles and failures which could
occur and which are easy to be remedied by an instructed person. Other
problems and faults should be announced directly to the manufacturer, the
LASKI Service Centre that is always ready to help you.
- Before any checks or servicing stop the engine, disconnect the spark plug
cable and wait until any motion stops.
- Do not put any objects or tools on the machine.
- While displacing the machine on the plot the chain bar must be set
horizontally and the machine operator should stand in the given attendant’s
place.