Maintenance and Care
MAN Industrial Diesel Engines D2848/40/42 LE201/203/211/213
68
Carefully read the Operating Instructions before starting any work!
This is especially valid for the chapter on General Safety Instructions
and the safety instructions in each of the chapters.
8.4.9 Changing V-Belt
Check condition of V-belt
If any wear is detected or if, on multi-belt systems,
the belts have different tensions, the entire poly-
V-belt set is always to be exchanged.
1 Check V-belts for cracks, oil fouling, overheat
ing and wear
2. Replace damaged V-belts.
Check V-belt tension
Use a poly-V-belt tension gauge to check the ten
sion of the poly-V-belts.
1. Push pointer (1) down into the scale.
2. Place tension gauge in the middle between the
two belt pulleys so that the edge of the contact
surface (3) is flush with the V-belt.
3. Slowly press vertically down on the tab (2) until
the spring audibly snaps out. The pointer will
move to the top.
Do not press any further after the spring snaps
out, otherwise a false reading will be given!
4. Read off the tension measurement where the
top side of the pointer (1) overlaps the scale.
5. Make sure that the pointer remains in its posi
tion before reading off.
If the measurement does not match the prescribed
adjustment value, the belt tension must be correc
ted.
1
2
3
Tension forces in a cold state with a kg scale on gauge
Belt width 2/3VX 4/3VX
For new installation For installation 90-100 180-200
After a 10 min. runtime 70-80 140-160
For maintenance after a long runtime 60 120
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