Perkins New 1000 Series, Workshop Manual, Page: 262 / 290

23
262 Workshop Manual, TPD 1350, issue 3
New 1000 Series
Drive belts
To check 23-1
1 Check the belt(s) for wear and damage and renew
the belt(s), if necessary. If twin belts are fitted, they
should both be renewed.
2 Check the belt tension. If twin belts are fitted,
check/adjust the tension on the tighter belt. To ensure
maximum belt life, it is recommended that a belt
tension gauge is used. Fit the gauge (A1) at the
centre of the longest free length and check the
tension. If a Burroughs gauge is used, the correct
tension is 355 N (80 lbf) 36 kgf. If the tension is equal
to or less than 220 N (50 lbf) 22 kgf, adjust it to 355 N
(80 lbf) 36 kgf
, see operation 23-2 . If no gauge is
available, press down the belt with the thumb at the
centre of the longest free length and check the
deflection (B). With moderate thumb pressure, 45 N
(10 lbf) 4,5 kgf, the correct belt deflection is 10 mm (3/
8 in).
To adjust tension 23-2
1 Loosen the pivot fasteners (B1) of the alternator
and the fasteners of the adjustment link (B2).
2 Change the position of the alternator to give the
correct tension. Tighten the adjustment link fasteners
and then the pivot link fasteners. If there are two pivot
fasteners, tighten the front fastener and then the rear
fastener.
3 Check the belt tension again to ensure that it is still
correct.
To remove and to fit 23-3
Where twin belts are fitted, they are supplied as a set
and must be renewed as a set.
1 Loosen the pivot fasteners (B1) of the alternator
and the adjustment link fasteners (B2).
2 Release all of the tension from the belt(s) and
remove the belt(s).
3 Fit the new belt(s) and adjust the tension , see
operation 23-2 . The belt tension must be checked
again after the first 1000 km (600 miles) or 20 hours
of operation.
1
A
A0281
B
A0282A
1
2
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