Drop hydraulic pressure to zero before disconnecting any hydraulic hoses. Failure to comply may result in injury to personnel. Hydraulic fluid (MIL-H-5606) is TOXIC. Wear protective goggles and gloves; use only in well ventilated area; avoid contact with skin, eyes, and clothes. Skin and clothing that come into contact with hydraulic fluid should be washed immediately.  Saturated clothing should be removed immediately.  Failure to comply may result in injury to personnel. WARNING PRESSURE TEST TM 9-2320-365-20-2 Change 1          2-2119/(2-2120 Blank)   (1) Position drain pan under spare tire retainer        cylinder.   (2) Disconnect SPARE RET pressure hose        from spare tire retainer cylinder port.   (3) Connect STE/ICE-R to SPARE RET pressure        hose.   (4) Start engine and charge air tanks        (TM 9-2320-365-10).   (5) Position SPARE TIRE knob to LOWER.   (6) Position FUNCTION SELECT knob        to SPARE TIRE.   (7) Push and hold PUMP plunger button        and perform STE-ICE-R Test #51        (TM 9-4910-571-12&P).   (8) If pressure is not 2,500-4,000 psi (17,237-        27,580 kPa), repair hydraulic manifold        SPARE TIRE valve (para 19-4).   (9) If pressure is 2,500-4,000 psi (17,237-        27,580 kPa), replace spare tire retainer        cylinder (para 14-5). (10) Drain air tanks (TM 9-2320-365-10). (11) Disconnect STE/ICE-R from pressure        hose. (12) Connect pressure hose to spare tire retainer        cylinder port. (13) Close hydraulic manifold cover and install        pin.