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Pump Cartridge Repair -706880847
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TM-5-4210-233-14-P-1 Firfighting Truck 100 Ft. Aerial Ladder 1000 GPM Manual
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Installation -706880849
TM 5-4210-233-14&P-1
5-26. POWER STEERING PUMP - Continued
(i) Check wearing surfaces of body (17), pressure plate (8), ring (11), and rotor (15) for scoring and
excessive wear. Light scoring marks may be removed by lapping. Deeply scored or worn parts
warrant replacement of the pump.
(j) Spin shaft and rock shaft end to and fro. Replace pump if bearing is noisy or excessive play is noted
when shaft is rocked.
(k) Push cover (5) onto pump shaft. Rock cover on shaft. If excessive play is noted between shaft
journal and cover, 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.
(I) Install new O-rings (10 and 11A) in the body and cover. Install ring (11) so that the arrow on the
perimeter points in direction of rotation as noted in step (d).
(m) Install rotor (15) on shaft and insert vanes (16) in rotor slots. Be sure the rounded vane edges are
toward the cover ring.
(n) Place pressure plate (8) on locating pins (21) and flat against ring (11). Position spring (7) on
pressure plate and install cover (5). Be sure cover ports are orientated as noted in step (b).
(o) Install and torque cover screws (1) to 75-85 ft. Ib. (100-1 15 Nm).
(p) Rotate the shaft by hand to ensure that there is no internal binding in the pump. Install shaft key
(14).
5-178

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