24. SERVICE PROCEDURE 24.2.13 CHECK APS (STARTING AID) Check the APS (starting aid) after the end of summer (when the ambient temperature goes below 15°C and the engine cooling water temperature is below 13°C). If the engine cooling water temperature is above 13°C, please ask your Komatsu distributor to carry out the inspection. 1. Open fuel valve 1 of the starting aid and remove hose 2 at the nozzle intake port end. 2. Operation priming pump 3 up and down until no more bubbles come out from hose 2 . Carry out the following checks at the same time. Check for leakage of fuel Check for clogged fuel piping 3.
Move the fuel control lever to the engine STOP position, turn the starting switch to the ON position, then turn the APS switch ON and check the following. Does the cold start pilot light up for approx. 12 seconds? Are the 2 glow plugs red hot when the cold start pilot goes off? When the cold start pilot is off and the starting switch is turned to the START position (for less than 20 seconds), is there combustion inside the intake manifold? Remove the plug when checking the glow plug. If there is any abnormality, see “16. TROUBLESHOOTING”. 24.2.14 DRAIN WATER FROM WATER SEPARATOR When float 2 is at or above red line 1 , drain the water according to the following procedure: 1.
Loosen drain plug 3 and drain the accumulated water until the float reaches the bottom. 2. Tighten drain plug 3 . 3. If the air is sucket into fuel line when drain the water, be sure to bleed air in the same manner as for the fuel filter. See Fuel Filter Cartridge in “24.5 EVERY 500 HOURS SERVICE” section. AE063831 3-35