00 0290 395 0 - RHB C 490-C 370 - 03/09
11
1 Introduction
General repair instructions
44966
14025
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
.
14027
Taper ring fasteners
Even when transmitting high forces from the drive ele-
ment to the shaft and vice versa, taper ring
fasteners are a safe joint when properly pre-loaded.
The important point for assembly is that the shaft, hub,
parallel key and tapered rings are thoroughly cleaned,
some semi-fluid lubricant of NLGI class 00, e.g.
CLAAS AGRIGREASE LC 00 / 000, is applied and
tightening is to the specified torque and in the correct
sequence of assembly.
Disassembly:
After loosening the axial clamping, loosen the taper
ring fastener with a sharp blow, using a block-ended
tube.
85677
Gib head key joints
Prior to installation, the shaft, the hub and the keyway
must be cleaned so they are free of grease, paint and
rust.
When delivered as a spare part, the gib head key is in
its raw condition, it is therefore too high and would
stick out too far after arresting it. Consequently the gib
head key must be matched to the component in ques-
tion by milling or grinding of the
bottom
face so that it
will not stick out more than necessary after arresting,
but can still be dismounted perfectly using the CLAAS
special tools (straight or cranked key extractor). The
conical
top
face must not be machined. Treatment
with a file is not recommended.
Warning!
Gluing on taper ring fasteners.
–
No
solid grease must be used when
assembling the parts.
Warning!
Damage to the taper ring fastener.
– The inside diameter of the block-ended
tube must be large enough to extend over
the tapered ring.
