Multiquip LS400 Wear Plate And Cutting Ring, replace the rubber energizer ring, 58%%5, 877,1

LS400/LS500 PUMP — MAINTENANCE (PUMP)
WEAR PLATE AND CUTTING RING	It is important that the wear components be inspected
Due to the abrasive nature of concrete, it is normal for the	weekly for proper sealing. Failure to inspect will
	eventually cause severe damage to the nun-plate and
cutting ring to wear on its sides as it shears through the
	material cylinders. Visually inspect wear plate and
concrete inside the hopper. The metal-to-metal friction and
	cutting ring to ensure surfaces are sealed against each
the abrasiveness of the concrete will cause extreme wear
	other. If a deep groove or a wide space has developed
and reduce sealing capability between the cutting ring and
	on the sealing surfaces, it is time for replacement.
wear plate. If the two components do not properly seat
against each other, slurry will pump into the hopper rather	Due to the motion of the Shuttle tube, the cutting ring
than out the discharge line. See Figure A. This condition	experiences a quicker rate of wear as opposed to the wear
can easily be observed:	plate.The wear ring typically requires replacement two times
1. The sudden change of the level of concrete inside the	per wear plate (2 to 1). When replacing the wear ring, also
	replace the rubber energizer ring.
hopper during each pumping stroke
2. Concrete slurry squirting into the air from the hopper
(Volcano effect)	58%%(5	&877,1*
3. When the output volume at the end of the delivery line	(1(5*,=(5
		5,1*
decreases in pressure		:($5
4. Unusual frequent material packs in the Shuttle tube		3/$7(
6+877/(78%(
,16,'(+233(5

*22'6($//($.,1*

Figure A. Wear Plate and Cutting Ring

PAGE 40 — MAYCO LS400/LS500 PUMP — OPERATION AND PARTS MANUAL — REV. #6 (09/19/11)