TM 55-2210-223-12 Table 2-1.  Operator/Crew Preventive Maintenance Checks and Services (Continued) ITEM PROCEDURES: EQUIPMENT ITEM TO BE CHECK FOR AND HAVE REPAIRED IS NOT READY/ NO.   B D A INSPECTED OR ADJUSTED AS NEEDED AVAILABLE IF: 12 Air Cleaner Check to see that the green scale Red scale is Indicator is visible.    visible. 13 Instrument Start the engine and observe One or more Gages and instrument gages and indicators to instruments are Indicators ensure that indications during inoperative or operation are normal as indicated giving faulty below: indications. Engine oil pressure 50-70 psi gage (345-483 kPa) Engine coolant 100-198°  F temperature gage (38-92^o C) Fuel pressure 50-70 psi gage (345-483 kPa) Air compressor oil 30-40 psi Pressure indica- pressure gage (207-276 kPa) tion is less than 30 psi (207 kPa). Engine oil filter less than Pressure indi- differential 15 psi cates more pressure gage (103 kPa) than 15 psi (103 kPa). Main reservoir 120-130 psi pressure (827-896 kPa) Brake pipe and Above equalizing reser- 80 psi voir pressure with (552 kPa) brakes released Brake cylinder pressure: brakes released zero brakes applied 45 psi (310 kPa) Load meter (idle) 0 amps Load meter (operating) 0-600 amps 2-24 Interval