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Home›Repair guides›V-Belt Tension Checking and Adjustment

MAN — V-Belt Tension Checking and Adjustment

A MAN service procedure — check it applies to your exact model before use.

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Before you start

  • If pressure is maintained after the spring has disengaged a false reading will be obtained!
  • Before taking readings make ensure that the indicator arm remains in its position.
  • A check should be made from time to time to see that the fastening elements securing the air cleaner to the intake manifold seal the connection tightly. Any ingress of unfiltered air is liable to cause a high rate of cylinder and piston wear.

Procedure

  1. Check V-belts for cracks, oil, overheating and wear.
  2. Use V-belt tension tester to check V-belt tension.
  3. Lower indicator arm (1) into the scale.
  4. Apply tester to belt at a point midway between two pulleys so that edge of contact surface (3) is flush with the V-belt.
  5. Slowly depress pad (2) until the spring can be heard to disengage. This will cause the indicator to move upwards.
  6. Read the tensioning force of the belt at the point where the top surface of the indicator arm (1) intersects with the scale.
  7. If the value measured deviates from the setting value specified, the V-belt tension must be corrected.
  8. If wear or differing tensions are found in multiple belt drives, always replace the complete set of belts.

Tools required

  • V-belt tension tester

Specs & torque values

  • 2/3VX: 90-100 kg (new), 70-80 kg (after servicing), 60 kg (after 10 min running)
  • 3/3VX: 135 kg (noted in spec table)

Source: manual:Technical data LE602 00000043en.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.