300SD (126.120) L5-3.0L DSL Turbo (617.951) (1982)
Attention!
On double belt drive, make sure that the measuring instrument rests on one V-belt only.
3
Exert a uniform, vertical pressure on V-belt upper surface by means of pushbutton, until click spring is audibly (or noticeably) disengaging.
NOTE: Upon disengagement of click spring, do not continue pushing on measuring instrument, since otherwise a wrong measuring value will be
indicated.
4
Carefully lift measuring instrument from V-belt. Avoid knocks against instrument and do not change position of indicator arm.
5
Read tensioning value at point of intersection of indicator arm and upper scale (KG scale, arrow).
The respective adjusting values refer to upper scale of measuring instrument.
Check condition of V-belt
Replace cracked, porous, burnt or worn V-belts.
Attention!
If one of the two V-belts of double belt drive for alternator and coolant pump fails due to wear, always replace both V-belts on principle.
Use only V-belts in pairs made by one and the same manufacturer.
V-belts are available as spare parts in sets only.
1
Move tensioning device or units into starting position.
2
Mount V-belt without using force.
3
Tension V-belt.