Carry out the follow procedure besides item 2.
Check full injection pressure and atomization quality. Clean and adjust when necessary.
Check injection advance angle and adjust when necessary.
Dismount cylinder head; Remove carbon deposit; Check valve sealing and lap when necessary.
Check connecting rod bolts, main bearing bolts and flywheel bolts for tightness.
Re-tighten the cylinder head bolts according to the sequence shown in Fig. 1, and adjust the
valve clearance.
Clean or replace air filter cartridge (may proceed earlier according to working condition)
Replace oil in injection pump and speed adjustor.
Clean cooling system. Cleaning fluid is mixture of 150g NaOH and 1 liter water completely.
Drain out the cooling water before cleaning, then fill in cleaning fluid and run the engine after
8-12 hours. Stop the engine when working water temperature is achieved, drain out cooling fluid
immediately to prevent the inflow scale depositing, finally clean the cooling system with clean
water.
Check thermostat working.
Check each electrical starting equipment to ensure all tightness and wiring connections are
tighten. Replace those burned out.
Check all engine parts, repair or adjust when necessary.
Fig.1 cylinder head bolts tighten sequence
Besides the above mentioned procedures, you may carry out more detail maintenance according to
your, own condition.
4 . E N GI N E P RES E RV A TI O N A ND S TO R AG E .
To store the engine for long time, immediately drain out oil, cooling water and fuel after
engine stops. Clean oil sump and oil filter cartridge.
Carry out maintenance procedure accordingly.
Disassemble intake and exhaust pipes. Fill 50g dewatered clean oil into air port and turn
crankshaft to make the oil smoothly cover the valves, cylinder head, cylinder liner, piston and
piston rings etc.
Remove all dirt from engine surface; brush the unpainted parts with butter except rubber and
plastic parts.
Cover the mouths of air filter and silencer, wrapped in plastic paper.
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