Claas LEXION 480, Repair Manual

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188 678.1 - RHB LEXION 480
1.3.1
General repair information
GENERAL REPAIR INFORMATION
Reason of damage
Identify reason of damage, limit the case of damage
and safeguard the machine.
Spare parts
Use genuine CLAAS spare parts and corresponding
CLAAS special tools.
Indicate the machine number of the CLAAS combine
and when the engine, front attachments, maize
header, cutterbar and maize picker are concerned,
also the respective serial numbers when ordering
spare parts and in case of technical questions. This is
necessary as otherwise, incorrect spare part deliveries
may result.
Engine
Always disconnect the battery cable (–) prior to
starting work on the engine.
Gearboxes
When removing the gearboxes, first drain the oil and
then remove the gearbox. Separate parts which are
firmly connected with each other by means of a soft
metal-tip or plastic-tip hammer.
Alternator
ATTENTION!
– Never disconnect the cables connecting the
controller, alternator and battery whilst the
alternator is running.
– Ensure correct polarity when connecting the
cables to the battery as otherwise the diodes will
be burnt out.
– Do not carry out any work on live parts unless
the engine is stopped and the battery cables are
disconnected.
– The normal practice of striking a cable against
earth to check for current is not permitted with
alternators. This will damage the semiconductors.
– Before doing any electric welding on the combine,
be sure to disconnect the cables from the
alternator terminals!
– The battery provides the current for the field
excitation required to start the alternator via the
battery charge indicator bulb. Blown bulbs must
therefore be replaced to ensure reliable field
excitation.
Tensioning the steel roller chains
Find the centre point in the slack span between
sprockets. With the tight span slightly under load, push
in the centre point of the slack span with the thumb.
The chain tension is correct when its slack span
deflects about 2 % of the centre distance between
shafts. Check chain tension more frequently when
using new chains.
Example: For a distance between centres of shafts of
500 mm, the slack span of the chain should deflect
about 10 mm.
Taper ring fasteners
Taper ring fasteners provide a safe mechanical
connection, even when transmitting high forces from
the driving element on the shaft and vice versa, if they
are properly prestressed.
Installation:
When installing taper ring fasteners, it is important that
the shaft, hub, parallel key and the taper rings have
been thoroughly cleaned, that semi-fluid lubricant of
NLGI class 00 (e.g. CLAAS semi-fluid lubricant EP 00)
is applied and that the components are tightened to
the specified torque in the correct order of assembly.
ATTENTION!
No solid grease must be used when
assembling the parts.
Removal:
After loosening the axial clamping, loosen the taper
ring fasteners with a sharp blow, using a block-ended
tube.
ATTENTION!
The inside diameter of the block-ended tube
must be large enough to extend over the
tapered ring.
Self-locking bolts
(with microencapsulated adhesive)
Replace self-locking bolts, e.g. Verbus-Plus /
Imbus-Plus and similar types every time such bolts are
removed. In exceptional cases, they may be reused up
to three times. Always observe the specified tightening
torque.
General repair information