300Tdi Discovery - ENGINE - V8i - Drive Belt Tension Check
12
ENGINE
2
REPAIR
Remove
1. Remove fan cowl upper.
2. Release drive belt tension by turning tensioner
clockwise.
3. With tension released, remove belt from
generator pulley.
4. Release tensioner pulley.
5. Remove drive belt. Mark direction of rotation on
belt if refitting
Refit
6. Clean drive belt pulley grooves and ensure
grooves are not damaged.
7. Position belt correctly around all pulleys except
generator. Illustrations RR3956 and RR3957
show correct drive belt run.
8. Turn drive belt tensioner clockwise.
9. Locate drive belt on generator pulley.
10. Ensure drive belt is squarely located on pulleys
with all grooves engaged.
11. Release tensioner to tension drive belt.
12. Fit upper fan cowl section.
DRIVE BELT - CHECK TENSION
As the drive belt is automatically tensioned, no tension
check or adjustment should be necessary. If the drive
belt is believed to be slack carry out the following
checks:
1. Visually check drive belt tension.
2. Watch movement of tensioner with engine
running, 5 mm ’bounce’ is normal. If tensioner
movement is 12 mm or more, fit a new tensioner.
See Drive Belt Tensioner
3. Inspect tensioner. Is the tensioner arm and
spring case in contact? If so fit a new tensioner.
4. Using a recognised drive belt tensioning gauge,
check belt tension several times, running engine
between checks. The checks should be made at
the same point on the belt, away from the
tensioner.
Drive belt tension, with used tensioner and used drive
belt should be more than:-
270N. Non air conditioning or
295N with air conditioning.
