Claas ROLLANT 250, Repair Manual

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298 332.0 - RHB ROLLANT 250 / 250 RC
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 round baler and
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.
Transmission
When removing the transmission, first drain the oil and
then remove the transmission. Separate parts which
are firmly connected with each other by means of a
soft metal-tip or plastic-tip hammer.
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 con-
nection, 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. Shell Retinax G or similar brands)
is applied and that the components are tightened to
the specified torque in the correct order of assembly.
Caution!
No solid grease must be used when assem-
bling the parts.
Removal:
After loosening the axial clamping, loosen the taper
ring fasteners with a sharp blow, using a block-ended
tube.
Caution!
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.
Always tighten self-locking bolts with microencap-
sulated adhesive rapidly to the specified tightening
torque. When removing these bolts, quickly unscrew
them completely. These self-locking bolts must not
come into contact with sealing compound (e.g.
“Epple 33” or similar products).
In individual cases, bolts with liquid locking compound
can be used instead of self-locking bolts only where
these bolts can be heated up to approx. 200 °C for
removing them. Ensure that the specified quality grade
of bolts (8.8/10.9 or similar grades) is observed here
as well.
Self-locking bolts with microencapsulated adhesive
may be used only where operating temperatures will
not 90 °C max. These bolts can be subjected
to full stress after 24 hours at +20 °C. To speed up the
curing time, heating may be applied (e.g. to 15 minutes
at +70 °C).
Liquid locking compound
(e.g. Delo-ML 187 / Loctite 242 or similar types)
Use liquid locking compound only where specified by
the manufacturer.
Correct application:
Metal surfaces where liquid locking compound is to be
applied must be absolutely free from grease. Use the
“Aktivator” included in the workshop package for
cleaning.