Doosan DX60R Shop Manual page 447

Measured Value and Troubleshooting
When the measured compression pressure is below the limit
value, inspect each part by referring to the table below.
No. Item
1 Air Cleaner Element
2 Valve Clearance
3 Valve Timing
4 Cylinder Head Gasket
Intake / Exhaust Valve
5
Valve Seat
Piston
6 Piston
Cylinder
Engine
Cause
Clogged element
Broken element
Defect at element seal portion
Excessive or no clearance
Incorrect valve clearance
Gas leak from gasket
Sticking valve
Gas leak due to worn valve seat
or foreign matter trapped in
valve
Gas leak due to scratching or
wear
Corrective Action
Clean the element.
Replace the element.
Adjust the valve clearance.
Adjust the valve clearance.
Replace the gasket.
Retighten the cylinder head bolts to the
specified torque.
Replace the intake / exhaust valve.
Lap the valve seat.
Perform honing and use an oversized
part.
SP001693
Page 267