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Hydraulic oil
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TM-9-2320-364-34-2 Palletized Load System (PLS) M1074/M1075 Manual
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Pressure relief valve set
TM 9-2320-364-34-2 12-6      12-2.  STEERING SYSTEM HYDRAULIC ADJUSTMENT (CONT). b. Steering Sequence Valve and Pressure Relief Valve 12B Adjustment. The steering hydraulic system operates at oil pressures up to 3,000 psi (20,685 kPa).  Never disconnect any hydraulic line or fitting without first dropping pressure to zero.  Failure to comply may result in serious injury or death to personnel. If steering system hydraulic adjustments are not performed in the correct sequence serious damage to equipment will occur.  Perform steering system hydraulic adjustment in the following sequence. NOTE Position drain pan under hoses. (1) Disconnect hose 2275 (1) and remove preformed packing (2) from fitting (3) on rear steering gear (4).  Discard preformed packing. (2) Apply hydraulic oil to preformed packing (2). (3) Position preformed packing (2) on fitting (3). (4) Install a flow meter in line between hose 2275 (1) and  fitting (3) on rear steering gear (4). (5) Fully open load valve on flow meter. (6) Start engine. Do not allow load valve to remain closed for more than 10 seconds. Damage to equipment could occur. (7) Slowly close load valve on meter. (a) If 2,000 to 2,025 psi (13,790 to 13,962 kPa) are not present when valve is fully closed, go to Step (8). (b) If 2,000 to 2,025 psi (13,790 to 13,962 are present, pressure relief valve 12B is adjusted correctly.  Go to Step (16). (8) Shut OFF engine.

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