Coltri Sub MCH 13/ET, Инструкция по эксплуатации

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58
The 2 nd stage intake valve can be removed for maintenance purposes while those of the 1 st , 2 nd (only
discharge) and 3
rd
stages must be entirely replaced. The seats must be cleaned carefully using petrol
and soft brass or nylon brushes.
The torque wrench setting for the head bolts of the 3 rd stage is initially 1 Kgm. Having moved the head
closer, tighten the bolts to 2.2 Kgm, making sure that the piston is at the bottom dead centre during the
operation.
Avoid using steel brushes or screwdrivers. The interval between maintenance operations is 400-600
working hours. If any parts are damaged or worn, they must be replaced. The discharge valves can be
removed from the outside while the intake valves can only be removed when the head of the cylinder has
been taken off.
NOTE: the valve replacement procedure must be carried out at the work bench by specialized technicians
who have specific equipment for the stripping operation.
In any case, it is preferable to contact AEROTECNICA COLTRI S.r.l. who will supply the necessary
technical assistance.
11.8 11.8
11.8 11.8 11.8
Intak Intak
Intak Intak Intake and disc
e and disc
e and disc e and disc e and dischar
har
har har har g
g
g g g e v
e v
e v e v e v alv
alv
alv alv alves
es
es es es
11.9 11.9 11.9 11.9 11.9
H e a d s H e a d s
H e a d s H e a d s
H e a d s
85
- The head of the 1 st stage (A) is of the lamellar
type (Fig. 85). It must be fitted so that the
word “TOP” remains upwards and the flaps
correspond with the openings in the cover
of the head. Replace every 1000 hours.
Maintenance