24. SERVICE PROCEDURE Procedure for bleeding air Follow steps 1 to 7 to bleed air. 1. Bleeding air from pump 1. Loosen air bleeder installed to the drain port, and check that oil oozes out. (Completion of air bleeding). 2. After completing the air bleeding operation, tighten the air bleeder. NOTICE If the pump is operated without filling the pump case with hy- draulic oil, abnormal heat will be generated and this may lead to pre- mature damage of the pump. 2. Starting engine Start the engine according to "12.2 STARTING ENGINE" keep running the engine at low idling for 10 minutes and carry out the following proce- dure. 3. Bleeding air from cylinders 1.
Run the engine at low idling, and extend and retract each cylin- der 4 - 5 times without operating it to the end of its stroke. (Stop approx. 100 mm (4 in) before the end of the stroke 2. Next, operate each cylinder to the end of each stroke 3 - 4 times. 3. After this, operate each cylinder 4 - 5 times to the end of its stroke to completely bleed air. NOTICE If at first, the engine is run at high speed or the cylinder is oper- ated to the end of its stroke, the air inside the cylinder may cause damage to the piston packing or other parts. PC130/150LGP-6K ENG 3-68