WARNING Drop hydraulic pressure to zero before disconnecting any hydraulic hose, tube, or fitting.  Failure to comply may result in injury to personnel. Wear approved eye protection when performing pressure checks. Failure to comply may result in oil getting into eyes.  If oil contacts eyes, seek medical attention immediately. Fuel and oil are slippery and can cause falls. Wipe up spilled fuel or oil with rags. Failure to comply may result in injury to personnel. NOTE Tag hydraulic hoses, tubes and fittings prior to disconnecting. M1089 LINEAR DIRECTIONAL CONTROL VALVE PRESSURE TEST (18) Remove swivel run tee from front fitting of        upper main valve. (19) Remove plug from hose. (20) Connect hose to front fitting of upper main        valve. M1089 LINEAR DIRECTIONAL CONTROL VALVE PRESSURE TEST (Cont)   (1) Place drain pan under vehicle.   (2) Disconnect hose from front fitting of        upper main valve assembly.   (3) Install plug in hose.   (4) Install swivel run tee on fitting.   (5) Install cap and reducer on swivel run tee.   (6) Connect test hose, 10,000 PSI transducer,        and STE/ICE-R to reducer.   (7) Start engine (TM 9-2320-366-10-1).   (8) Position PTO switch to on        (TM 9-2320-366-10-1).   (9) Set engine speed by increasing HAND        THROTTLE lever until tachometer reads        1,250-1,450 RPM. (10) Position STATION SELECTOR switch to        WRECKER CONTROL PANEL. (11) Preform STE/ICE-R test #51        (TM 9-4910-571-12&P). (12) Position MAIN WINCH LH lever to OUT and        note reading. TM 9-2320-366-34-1 Change 1          2-1008.1 In the event of a tachometer failure a HAND THROTTLE lever positioned to L is approximately 1,250-1,450 RPM. NOTE (13) If pressure is not between 2,950-3,050        PSI (20,340-21,030 kPa), repair or replace        M1089 linear directional control valve        (para 16-82). (14) Position PTO switch to off        (TM 9-2320-366-10-1). (15) Shut down engine (TM 9-2320-366-10-1). (16) Disconnect STE/ICE-R, 10,000 transducer,        and test hose, from reducer. (17) Remove reducer and cap from swivel run tee.