MASSEY FERGUSON 425X, Workshop Manual

Page: 15 / 51

Introduction
01A01-8
MF 400 Xtra
01
Rule for tensioning belts and chains
Use the following rule to check belt tension:
Apply a load of
10 to 15 kg at the center of the largest
unsupported distance.
Deflection in the belt or chain should be 1 to 2% of
this distance.
In the case of chains, apply sufficient force to bring
all of the deflection to one side: should be 1 to 2% of
the distance between the centers.
Interference fitting of bushings, retainers and
bearings:
Always use a special tool for this job. When
necessary, use a press to apply force. Whenever
necessary, apply the recommended force by means
of a suitable press.
Improvisation in this case leads to wasted time and
damaged parts, which will cause operating
problems.
With bushings, check the internal diameter (or
external diameter, if that is the case) and make an
adjustment if you need to, based on the
specifications in this manual for each situation.
Use correct punches to remove pulleys, hubs
and gears.
Using hammers and levers may damage the parts,
and will probably take longer than using the right
tools!
NOTE: use a protector for the end of the axle.
Use the right tool for each job.
Using the wrong tool just to save a few steps can
end up wasting a lot more time after you damage a
hex nut, a screw slot...
Force of 10 to 15 kgf
Deflection of 1 to 2%
Distance between
centers
Fig. 13
Deflection
Mounting a bushing Mounting a retainer
Fig. 14
Fig. 15
Fig. 16