Komatsu WA300L-3 Wheel Loader Service Manual

Table of Contents

• General
• Structure and Functions
• Testing and Adjusting
• Disassembly and Assembly
• Maintenance Standard
• Others

Manual Extract When parking brake lever is pulled (OFF to ON):

ADJUSTING VALVE CLEARANCE
1. Remove the exhaust pipe.
2. Remove the muffler and muffler bracket.
3. Remove the air cleaner assembly and air cleaner bracket.
4. Remove the air supply connector.
5. Remove 6 cylinder head covers.

6. Remove plate ( 1) and cap (2).
7. Using tool F1, turn the crankshaft in the normal direction until timing pin (3) enters the hole in the gear to set the No.1 cylinder to the compression top dead center position. * Push the timing pin lightly while cranking.
8. In this position, adjust the clearance of the valves marked • in the valve arrangement chart. * After completion of adjustment, make counter marks on the crankshaft pulley and gear case, then remove the timing pin.

9. Rotate the crankshaft one turn in the normal direction and align the countei maiks made in Step 8.
10. In this position, adjust the clearance of the valves marked O in the valve arrangement chart.
11. To adjust the valve clearance, loosen locknut (7), insert feeler gauge F2 between rocker lever (4) and valve stem (5), and turn adjustment screw (6) until the clearance is a sliding fit. Then tighten locknut (7) to hold the adjustment screw in position.

Locknut : 24 Nm {2.45 kgm}
* After tightening the locknut, check the clearance again.