NOTE:  B=BEFORE OPERATION  D=DURING OPERATION  A=AFTER OPERATION ITEM Interval ITEM TO BE INSPECTED PROCEDURES EQUIPMENT IS NOT NO. READY/AVALABLE B D A IF TM 5-4310-393-14 19 Engine Exhaust Muffler Check maintenance record and inspect the engine exhaust muffler every 40 hours, replace if unserv- iceable (paragraph 3-15.3). 20 Engine Oil Verify the engine oil has been changed within the last 120 hours of operation (paragraph 3-15.1). 21 Compressor Oil Verify the compressor oil has been changed within the last 240 hours of operation (paragraph 3-14.1). 22 Purifier Cartridge Replace the purifier cartridge after every 40 hours of operation (paragraph 3-16.2). 23 Compressor Air Intake Filter Replace the air cleaner filter ele- ment after every 120 hours of op- eration (paragraph 3-14.3) 24 Oil Pressure Regulator Check oil pressure setting, adjust if necessary, (oil pressure should be 850 psi) (paragraph 3-14.1) 25 Throttle Control Hand Lever Check for movement (paragraph 3-15.4) Section III.  OPERATION UNDER USUAL CONDITIONS Paragraph Page 2-7 Assembly and Preparation for Use  ....................................................................................... 2-7 2-8 Pre-Operational Checks  ...................................................................................................... 2-8 2-9 Start-Up Procedures  ........................................................................................................... 2-9 2-10 Shutdown Procedures  ....................................................................................................... 2-10 2-11 Preparation for Movement  ................................................................................................. 2-10 2-12 Decals and Instruction Plates ............................................................................................. 2-11 2-7.  ASSEMBLY AND PREPARATION FOR USE. Before starting the engine, ensure that the person has the necessary qualifications and training, and is aware of all safety precautions and regulations that must be observed. WARNING To  PREVENT  INJURY,  ENSURE  THAT  WORK  CLOTHES  ARE  CLOSELY  FITTING SO     THAT     THEY     CANNOT     BE     CAUGHT     IN     ROTATING     MACHINERY     OR PROJECTING PARTS. 2-7