Checking And Setting; Adjustment Of Valve Clearance - Doosan D1146 Installation Operation & Maintenance

6. Checking and Setting

6.1. Adjustment of Valve Clearance

6.1.1. General information
The valve clearances are to be adjusted at the times of the following situations.
•
After initial 50 hour's operation.
•
When the engine is overhauled and the cylinder heads are disassembled.
•
When severe noise comes from valve train.
•
When the engine is not normally operated, even though there is no trouble in the fuel sys-
tem. The valve clearance of the cold engine are as follows.
6.1.2. Adjusting order of the valve clearance
•
Cylinder No. 1 begins from the rear side where the flywheel is mounted but cylinder No. 6
begins from the front side of the engine on the contrary.
Flywheel
Step 1:
•
After letting the cylinder No.6 in the overlap TDC position by turning the crankshaft, adjust
the valves corresponding to "
the ignition TDC position(O.T).
Step 2:
•
After adjusting upper valves turn the crank pulley 360˚ to adjust the other valve clearance
until the cylinder No. 1 comes to overlap TDC position.
At this time cylinder No. 6 should be at the ignition TDC position(O.T).
•
Adjust the valves corresponding to "
After reconfirming the valve clearances, retighten it if necessary.
Intake Valve
1 2
" of following figure. At this time cylinder No. 1 should be at
Exhaust Valve
3 4
" in upper figure.
- 46 -
Cylinder No. Crank pulley
5 6
ED5OM005