| Symptom |
Possible causes |
Action |
| Noise |
- Belt condition
- Belt fouling cover
- Tensioner bearing failure
- Fuel injection pump failure
|
Check the belt condition (see visual inspection). Check the
belt cover for indications of fouling (this may indicate a pump
misalignment), refer to the relevant workshop manual section. The belt
tensioner must be renewed if the belt is removed, making a check of the
bearing impractical. Remove the belt, check the fuel injection pump pulley
for security. Check the fuel injection pump for excessive resistance to
rotation (excessive resistance in the pump will cause the pulley securing
nut to loosen as a design feature). Check for diagnostic trouble codes
(DTCs) indicating a pump malfunction. |
| Drive belt does not hold tension |
- Belt condition
- Tensioner fault
|
Check the belt condition (see visual inspection). Check the
tensioner function. Rectify as necessary. |
| Loss of drive (with no drive to the fuel injection pump, the
engine will not run) |
- Belt broken/stripped teeth
- Drive pulleys loose
|
Investigate the cause of the belt breakage/damage (a belt
broken at a 45 degree angle normally indicates a shear, a break straight
across the belt normally indicates that the belt has been crimped). Check
the fuel injection pump for excessive resistance to rotation (excessive
resistance in the pump will cause the pulley securing nut to loosen as a
design feature). Check for DTCs indicating a pump malfunction.
|