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Chapter 8 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES
Cooling System
Coolant (Fresh Water) - Change
When a coolant mixed with the LLC recommended by our company is used, replace coolant every 8000 hours or
2 years, whichever comes first.
Coolant Expansion Tank Cap - Open/Close
Never open the coolant expansion tank cap during
the operation or immediately after stopping. Stop the
engine and, after coolant has sufficiently cooled
down, open the cap.
To open the coolant expansion tank cap, place a
waste cloth over the cap, and loosen it about a quar-
ter-turn to release the internal pressure.
The coolant is hot while the engine is running and im-
mediately after stopping. If the cap is opened while
the coolant is hot, hot coolant steam that can burn
you will burst out. To avoid a steam burn, wear thick
rubber gloves or wrap a cloth around the cap.
When tightening the coolant expansion tank cap, be
sure to tighten securely.
Coolant - Drain
1. After making sure the engine has cooled, open the
coolant expansion tank cap.
2. Prepare a can that catches coolant, and open the
drain cocks and plugs to drain the coolant.
8-18
Fig. 8-22 Coolant Expansion Tank Cap
Left side
Coolant
drain cocks
The coolant drain cocks located in the crankcase
(behind the each fuel injection pump
accessory drive unit).
Fig. 8-23 Coolant Drain Cock (Engine Body)
1/4 turn to reliese
pressure.
Right side
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