MASSEY FERGUSON 410 Operators Instruction Book page 93

Alternator and fan belt
Check the fan and alternator belt tension every 250
hours.
WARNING: If the lower side panel
(safety guard) is removed or loosened
while checking the belt tension, it must
be refitted and secured before
restarting the tractor.
Fig. 135 gives a typical illustration of the alternator/fan
belt arrangement; your tractor may differ slightly in
the positioning of the adjustment link. Renew the belt
if it is worn or damaged. To check the deflection,
press down the belt with the thumb at the center of
the longest free length. With moderate thumb pressure
the correct deflection of the belt is 10 mm (0.375 in).
If a belt tension gauge is available, the correct tension
is 355 N (80 lbf), DO NOT allow the tension to fall
below 220 N (50 lbf).
To adjust the belt tension:
1. Loosen the alternator pivot bolts (1) and the
adjustment link bolt (2).
2. Change the position of the alternator to give the
correct tension. Tighten the two bolts.
3. Recheck the belt tension to ensure that it is still
correct.
NOTE: If a new belt is fitted, check/adjust the tension
again after 25 hours of operation.
Headlights
Headlight adjustment
To adjust the headlights, screw the four screws
(Fig. 136) in or out as required, this will deflect the
beam up, down or sideways. On some models it is
possible to adjust the headlights using a short
screwdriver without opening the front grille.
To adjust the beam:
1. Position the tractor facing a wall or screen 7,5 m
(25 ft) away, distance (A) (Fig. 137).
2. Draw a horizontal line on the wall or screen (1)
the same as the center height of the headlights from
the ground (B).
3. Draw two vertical lines (2), the same as the
horizontal center to center distance between the
headlights (C), (315 mm).
4. Draw a second horizontal line (3) at a distance (D)
below and parallel to line (1). Distance (D) is calculated
by multiplying distance (B) by 0.1; for example,
headlight height 985 mm x 0.1 = 98,5 mm.
5. Adjust each headlight, on main beam, individually
by covering the opposite one and aligning the upper
edge of the illuminated zone to line (3).
410/420/430 - 001 8903 U1
UZEL
Maintenance and Adjustment
Fig.135
Fig.136
Fig.137
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2
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