How To Check The Drive Belts; How To Renew The Fan Belts; How To Renew The Alternator Belt - Perkins 3000 Series User Handbook Manual

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How to check the drive belts

Check all drive belts and renew a belt if it is worn or
damaged. Where more than one belt is used between
two pulleys, all of the belts must be renewed together.
Maximum belt life will be obtained only if the belts are
kept at the correct tensions.
Check the belt tension at the centre of the longest free
length, for example, position (A5) to check the fan
drive belts.
Use a 'Gates "Krikit" V-belt tension gauge' or similar
tool to check the tension of the belts.
The correct tension for all belts is 400 to 489 N (90 to
100 lbf). Where more than one belt is used between
two pulleys, check/adjust the tension on the tightest
belt.
Note: When new belts are fitted they must be
checked again after the engine has been run for 15
minutes and, if necessary, adjusted to the correct
tension.
How to adjust the tension of the fan belts
1 To adjust the tension of the fan belts, loosen the
nuts on the adjustment bolt. Loosen the large lock nut
(B1) on the belt tensioner and turn the adjustment bolt
(B2) until the correct tension is obtained.
2 Tighten the lock nut and check the tension of the
belts again.
3 Run the engine for 15 minutes and then check the
belt tension again.
Check the tension of new belts every week for four
weeks and then at the intervals specified in the
service schedule
How to adjust the tension of the alternator belt
1 Loosen the alternator pivot bolt (A1), the
adjustment link bolt (A3) and the adjustment bolt (A2).
Move the alternator to obtain the correct belt tension
and tighten the bolts.
2 Run the engine for 15 minutes and then check the
belt tension again.
Check the tension of new belts every week for four
weeks and then at the intervals specified in the
service schedule.

How to renew the fan belts

1 To renew the fan belts, remove the six bolts which
fasten the fan to the pulley and push the fan forward
into the radiator cowl.
2 Release the tension on the belts and remove the
old belts. Ensure that the pulley grooves are free from
grease and dirt. Fit a new set of belts.
3 Fit the fan and tighten the bolts securely. Adjust the
fan belts to the correct tension.
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How to renew the alternator belt

1 Remove the fan belts from the crankshaft pulley as
given on this page.
2 Loosen the adjustment bolts to release the tension
on the alternator belt and remove the old belt. Check
that the pulley grooves are clean and fit a new belt.
Adjust the belt to the correct tension. Fit the fan belts
as given on this page.
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