299 216.0 - RHB MEDION 340 - 310 1.3.1
General repair instructions
GENERAL REPAIR INSTRUCTIONS
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 serial number of the machine 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 to prevent
incorrect spare parts deliveries.
Engine
Always disconnect the battery cable (–) prior to start-
ing work on the engine.
Gearboxes
When removing the gearboxes, always drain the oil
first 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
– Never disconnect the cables connecting the con-
troller, 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.
– Work on live parts may be carried out only after
disconnecting the battery while the engine is
stopped.
– 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 com-
bine-harvester, be sure to disconnect the alterna-
tor terminals!
– The battery provides the current for the field exci-
tation required to start the alternator via the bat-
tery 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: Distance between shafts 500 mm = Deflec-
tion of slack span is roughly 10 mm.
Taper ring fasteners
Taper ring fasteners provide a safe mechanical con-
nection, even when transmitting high forces from the
driving element on the shaft and vice versa, provided
they are properly prestressed.
Installation:
One important requirement for assembly is that the
shaft, hub, parallel key and tapered ring be thoroughly
cleaned, coated with semi-fluid lubricant of
NLGI class 00 (e.g.CLAAS semi-fluid lubricant EP 00,
part no. 147 455.1) and tightened to the specified
torque and in the correct assembly order.
Do not assemble parts with solid grease.
Disassembly:
After loosening the axial clamping, loosen the taper
ring fasteners with a sharp blow, using a block-ended
tube.
The inside diameter of the block-ended tube
must be large enough to extend over the
tapered ring.
Self-locking bolts
(with micro-encapsulated adhesive)
Replace self-locking bolts, e.g.Verbus plus / Inbus plus
and the like for every assembly process. In exceptional
cases, they may be reused up to three times. Always
observe the specified tightening torque.
Always tighten self-locking bolts with microencapsu-
lated adhesive rapidly to the specified tightening
torque. When removing these bolts, quickly unscrew
them completely. These self-locking bolts must not get
in contact with liquid sealing compound
(e.g. omni FIT FD 10).
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