REG. CODE
1-5302-509
MODEL N°
50778
DATE OF ISSUE
10.06.99
REVISION
00
DATE
10.06.99
ENDORSED
COMPILER TECO/ATI
24
DISASSEMBLY/REASSEMBLY
VIII
Timing pulley - Timing system tuning reference marks
1 Timing system tuning reference mark for LGW 523 and LGW 627
2 Timing system tuning reference mark for LGW 523
3 Timing system tuning reference mark for LGW 627.
Only remove the timing belt from its protective casing just
before assembly.
Tuning the timing system - Refitting the timing belt
Match the reference marks on both the timing pulley fig. 23 and
driving pulley fig. 21.
Insert the timing belt as shown in fig. 24, complying with the
direction shown by arrows A on it. The arrows must indicate the
rotation direction (clockwise) as viewed from the timing system side.
Tighten nut 1 by hand until the belt tightener rests on the surface of
the engine block.
Belt remounting must begin with the camshaft pulley and then pass
to that of the drive shaft, not the driven shafts.
Tuning the timing system - Belt tightening tool
Fit tool 1 Serial N° 7107-1460-049 (see page 92) into lever 2.
Tuning the timing system - Tightening the timing belt and belt
tightener torque
Fit the torque wrench into the above mentioned tool so that axis A of
the wrench fig. 27 is 90° to axis B of the tool in fig. 26.
Torque to 20 Nm in a clockwise direction. Maintaining the belt
tightened in these conditions, torque nut 3 to 40 Nm with another
torque wrench.
After having remounted the single-race pulley, turn the crank shaft a
few turns and make sure that the obtained belt tension is as
described above.
A further belt tension test can be conducted with a special tension
gauge available on the market (type ND DENSE).
Belt tension must be 15 ± 2 Kgm.
23
24
25
27
26
