3-26
C - EVERY 250 HOURS SERVICE
Carry out the operations described previously as well as the following operations.
C1 - SPANNIING POLY--V--RIIEM
CHECK - ADJUST
Open the engine hood and remove crank case 1 (Fig.C1).
Check for the presence of damage on ribbed belt 2 (Fig.C1/2) moving one section at a time;
to carry out this check:
- Make a mark with chalk on the ribbed belt;
- Make the engine run in bursts or move the ribbed belt by means of a rotation device up to
the chalk mark;
- Replace ribbed belt 2 (Fig.C1/2) if one of the following types of damage mentioned are
present (Fig.C1/3).
The damage (Fig.C1/3)
1 – New belt (comparison; ribbing)
2 – Wear on the sides: wedge-shaped ribbing
3 – Frame visible at the bottom of the ribbing
4 – Ribbing broken
5 – Transverse cracks in different ribs
6 – Rubber nodules at the bottom of the belt
7 – Dirt or rubble deposits
8 – Ribbing detached from the bottom of the belt
9 – Wires of the frame torn on the sides
10 – Outer wires of the frame frayed
11 – Transverse cracks on the back
12 – Transverse cracks in different ribs
For assembling and disassembling the ribbed belt,
see point
D3.
C1/1
1
C1/2
2
C1/3
2
1 4
5
4
45 5
6
6
6
7
8
9
10
11
12
3