DRESSTA 515C, Operator'S Manual, Page: 142 / 205

MAINTENANCE
SECTION 5
Page 35
DRESSTA OM515C520C99/1E
ENGINE
5.11.5. INSPECTION OF IDLER PULLEY
Idler pulley should be checked every 1000 hours of operation. The pulley should rotate freely.
Inadmissible are rough indents which can be detected with a finger (Fig. 5.23).
Fig. 5.23. Inspection of Idler Pulley
5.11.6. ADJUSTMENT OF ENGINE VALVES
1. Lift the hood or radiator grill (Fig. 5.48, 5.48A and 5.48B).
2. Disconnect the turbocharger air inlet hose. Remove the valve covers (Fig. 5.24).
Fig. 5.24. Removal of Valve Covers.
3. Position the first cylinder piston in the top dead center (TDC) by turning the pinion on the rack by
hand and simultaneously pressing the timing pin (Fig. 5.25). When the pin slides into the
camshaft hole/opening, the cylinder piston has reached the top dead center (TDC).