Valtra VALMET Series, Руководство по ремонту

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11
Model Code Page
12. Repairs
8. 11. 1990
6000--8750 120 1
General instructions for repairs
Outer oil seals
The Service Manual contains instructions for changing all outer oil seals, (e.g. oil seals on the PTO shaft end, on the output shaft
to the front wheel drive and on the pinion shaft on the powered front axle, and so on).
Sealing compound and glue
If sealing compounds or glue are required for the repair work, the instructions will specify a sealing compound or glue which is
readily available through specialist dealers. Some seals should be greased before fitting and the space between the lips of the
seal should be filled with universal grease. If the seal is to be pushed over splines or sharp edges the seal should be protected
with for example a thin plastic foil.
Tightening torques and setting values
All necessary tightening torques and setting values for each repair operation are given at the beginning of each repair section
under the heading Technical Data. The most important values can also be found in the repair instructions.
Table 1 later gives the tightening torques in order of dimension, quality and surface treatment. The values given in the table should
be used if the tightening torque is not given in the repair instructions.
Safety
Always bear safety in mind when repairing or servicing the tractor. Use tools and lifting devices in the correct way . When you
are removing tractor components or splitting the tractor, every tractor part must be supported in such a way, that no risk of accident
exists. Avoid working under the supported tractor part if it is not absolutely necessary. When supporting the tractor the centre of
gravity of the frame part must always be checked. For instance the wedges must always be fitted between front axle and engine
to prevent axle oscillation when splitting the front frame of the tractor.
Trouble---shooting
The following procedure, combined with the information contained in the workshop manual will be helpful in tracing faults accu-
rately. It consists of following a number of logical steps to locate and correct the problem:
a) Determine the problem
b) List possible causes
c) Differentiate the causes
d) Conduct checks in logical order to determine the exact cause
e) Consider approximate remaining service life against cost of parts and labour..
f) Make any necessary repairs.
g) Recheck the parts and functions for correct operation
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