The piston must be oriented in a way that the holes having smaller diam-
eter are placed towards the setting washers (37).
• Tighten the nut ( 38 ) manually.
• Clamp in the vice the damping rod ( 32 ) milled area.
• Using a proper spanner (12 or 13 mm according to the installed nut) tighten
the nut (38) up to the required torque (see Table 1 – Tightening torques).
Bottom valve overhauling (compression braking)
Dismantling:
• Clamp in the vice the bottom screw through the spanner seizing ( 47 ).
• Using a 13 mm spanner unscrew the nut ( 42 ).
• Remove the nut ( 42 ), the spring ( 33 ), the washer ( 43 ), the piston ( 45 )
complete with the o- ring ( 44 ), the washer or the washers’ stack regulating
the compression ( 46 ), following this order.
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