The tools listed will be needed to do the following procedure:
MEL10630 – Engine Compression Kit
MEL1631 – Compression Adapter
The engine must be at operating temperature.
Disconnect the air cleaner inlet hose (Item 1) [Figure 70-10-25] from the intake manifold.
Remove the glow plugs. (See Glow Plugs Removal And Installation on Page 70-80-1.)
Install the correct compression adapter (Item 1) [Figure 70-10-26] into the cylinder head.
Connect the compression gauge to the adapter [Figure 70-10-27].
Make sure the engine speed control is fully backward (engine idle).
Disconnect the fuel stop solenoid.
Crank the engine with the starter cranking rpm.
If the measurement is below the allowable limit, check the cylinder, piston ring, top clearance, valve and cylinder head.
Compression Pressure should be 427 – 469 PSI (29,4 -32,3 bar)
Allowable Limit (minimum) is 341 PSI (23,5 bar) No more than 10% variance among cylinders.
Push the button on the compression gauge to release pressure [Figure 70-10-28].
Connect the fuel stop solenoid.
