Chapter 3 – Maintenance
Service manual AJP PR3/PR4 3 - 19
Tighten the set screw (2) until you have a
slight friction in the feeler gauge (3);
Tighten the fixing nut;
Check the clearance value and repeat the
operation if necessary until the specified
clearance;
Hold the fixing screw and tighten the fixing
nut.
Clearance adjustment on the exhaust
valve
Loosen the lock nut (1) and enter the blade of
the feeler gauge;
Tighten the set screw (2) until you have a
slight friction in the feeler gauge (3);
Tighten the fixing nut;
Check the clearance value and repeat the
operation if necessary until the specified
clearance;
Hold the fixing screw and tighten the fixing
nut.
Tightening torques:
Intake:
24N.m (2,4Kgf.m)
Exhaust:
26N.m (2,6Kgf.m)
Check if the O-rings (1) of the valve caps are
in good condition, replace if necessary.
Apply oil to the O-rings.