OPERATION ENGINE COOLANT TEMPERATURE GAUGE This gauge (3) indicates the engine coolant temperature which must be in the operating range between 80 - 85 °C (176 - 185°F) Always allow the engine ample time to warm up to within these operating ranges before working the machine. Never allow the engine to exceed these operating temperatures, damage to the engine could occur. AIR CLEANER RESTRICTION ALERT This warning light (4) comes on when the engine air filter is restricted. If this indicator comes on during operation, shut the machine down and have the air filter system serviced. Do not oper- ate the machine with a restricted air filtering system, damage to the engine may result.
ENGINE OIL PRESSURE ALERT This warning lamp (5) comes on along with an audible alarm to alert the operator of an engine oil pressure loss. If this light should come on during operation or remain on after start-up, shut the engine down immediately. If this light does not come on when the ignition key is turned on, have the system checked by your Komatsu dealer. Do not operate the machine if this light comes on intermittently or remains on, damage to the engine may result. GLOW PLUGS PREHEAT INDICATION In cold weather during initial start-up there is a need to preheat the combustion air to aid in starting the engine.
To use this feature, hold the ignition switch in the preheat position for approxi- mately 30 seconds, the indicator light (6) will come on and remain on for about 30 seconds, after the light goes out the engine may be cranked. This procedure may have to be repeated one more time. See “STARTING THE ENGINE IN COLD WEATHER” on page 2-32. Due to the glow plug feature equipped with this machine, do not use Ether or other starting aids. Damage to the engine or possible injury to the operator may result. ALTERNATOR ALERT This warning light (7) comes on along with an audible alarm to alert the operator that the battery is not charging.
If this light should come on during operation or remain on after initial start-up have the charging system checked as soon as possible by an authorized Komatsu Dealer. 2-12 WB140-2N, WB150-2N