24. SERVICE PROCEDURE 24.5.8 CHECK AND ADJUST TENSION OF AIR CONDITIONER COMPRESSOR BELT Testing The belt should deflect 14-16 mm (0.55-0.63in) when pressed with a finger force of approx. 6 kg (13 lb) at a point midway between the crank- shaft pulley and the compressor pulley. Adjusting 1. Loosen 2 bolts a and 2 bolts b , and move compressor c to adjust. 2. When the deflection is correct, tighten bolts a and b to hold the compressor in position. 3. Check each pulley for damage, and check the V-groove and V-belt for wear. In particular, check that the V-belt is not contacting the bottom of the V-groove. 4.
If the V-belt is streched and cannot be adjusted any further, or if there are any cuts or cracks, replace the V-belt. 5. After replacing the V-belt, adjust again after one hour of operation. 24.5.9 REPLACE FUEL FILTER CARTRIDGES Engine is at high temperature immediately after the machine has been operated. Wait for engine to cool down before replac- ing the filter. Do not bring fire or sparks near the fuel. When cranking the engine, confirm all safety pocedures for around the engine, as the engine may start. WARNING Prepare a filter wrench and a container to catch the fuel. 1. Set the container to catch the fuel under the filter cartridges. 2.
Using a filter wrench, turn filter cartidges a counterclockwise to re- move them. 3. Clean the filter holders, fill new filter cartridges with clean fuel, coat the packing surface with engine oil, and fit new thread adapter seal to the filter holders. 4. When installing, tighten until the packing surface contacts the seal surface of the filter holder, then tighten it up 1/2 to 3/4 of a turn. If the filter cartridge is tightened too far, the packing will be damged and this eill lead to leakage of fuel. If the filter cartridge is too loose, fuel will also leak from the packing, so always thighten to the correct amount. PC450-ENG 3-60