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REPAIR - TM-5-4210-220-12_600
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TM-5-4210-220-12 Truck Firefighting: Powered Pumper: Foam and Water 500-GPM Capacity; Centrifugal Pump Power Takeoff Driven Manual
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Power Steering Filter Reservoir
TM 5-4210-220-12 4-25.  STEERING SYSTEM - Continued 4-25.3 Power Steering Pump - Continued c. Pump Cartridge Repair - Continued (8) Check wearing surfaces of body (12), pressure plate (4), ring  (7),  and  rotor  (8)  for  scoring  and  excessive  wear. Light scoring marks may be removed by lapping.  Deeply scored or worn parts warrant replacement of the pump. (9) Spin shaft and rock shaft end to and fro.  Replace pump if bearing is noisy or excessive play is noted when shaft is rocked. (10) Push cover (2) onto pump shaft.  Rock cover on shaft.  If excessive play is noted between shaft and cover journal, replace pump. NOTE During handling and shipping of new cartridge parts, burrs may be raised on sharp edges.  Be sure   to   remove   these   burrs   before   installing new parts in pump. (11) Install new O-rings (6 and 10) in the body and cover.  Install ring (7) so that the arrow on the perimeter points in direction of rotation as noted in step 3. (12) Install rotor (8) on shaft and insert vanes (9) in rotor slots.  Be sure the rounded vane edges are toward the cover ring. (13) Place pressure plate (4) on locating pins and flat against the ring.  Position spring (3) on pressure plate and install cover (2).  Be sure cover ports are orientated as noted in step 1. (14) Install and tighten cover screws (1) to 75 ft lb (100 Nm). (15) Rotate the shaft by hand to ensure that there is no internal binding in the pump.  Install shaft key (11). (16) Install and test pump on truck as detailed in INSTALLATION preceding. 4-480/(4-481 Blank)

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