06-B50 TECHNICAL MANUAL-ENGINEERING CPY-2009 - REED

REED MODEL: B50TRAILER CONCRETE PUMPMAINTPAGE 34SWING TUBE & COMPONENTSThe sealing characteristics of the swing tube depends on metal to metal friction of the wearring, located inside the swing tube, to the wear plate installed on the inside of the hopper at thematerial cylinders. This friction and the abrasiveness of the pumping material mixes will causewear and a breakdown of the sealing action. As this breakdown occurs, periodic adjustmentsto the swing tube can be made as described in the ADJUSTMENT SECTION. This will help toimprove the sealing quality, however, eventually the components will need to be replaced.Some tell-tell signs or identifying symptoms that adjustment is needed or parts are worn mightbe:• When deep grooves have developed on the face of the wear plate and/or on the wearring.• When the output volume at the end of the delivery line noticeably begins to decrease oreventually stops for no apparent reason.• When the material being pumped is being forced back into the hopper under pressure.REVISION: