MQ Multiquip MQD2H, Руководство по эксплуатации

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PAGE 20 — MQD2H/3H DIAPHRAGM PUMP • OPERATION MANUAL — REV. # 8 (07/31/20)
MAINTENANCE (PUMP)
ROTATION OF SUCTION AND DISCHARGE PORTS
In some applications, it may be preferable to have suction/
discharge ports rotated 90° (Figure 22) to be in-line with
the pump wheels. Perform the following procedure to rotate
ports:
1. Remove the four hex head cap screws, hex nuts, flat
washers and lock washers from the pump base.
2. Push pump well downwards to separate from pump
base.
3. Rotate pump well 90° clockwise so that driver is
positioned over top of discharge plate.
4. Align pump well, pump base, and diaphragm with
each other. Once all components have been properly
aligned, reinstall the four hex head cap screws, hex
nuts, flat and lock washers and tighten securely.
Figure 22. Suction/Discharge Port Rotation
CLEARING A JAM
If large solids or an accumulation of sand, silt or other
sediment gather and become lodged in the pump well, the
plunger arm may be prevented from making a normal full
stroke. This action may cause the pump to stall, the crank
to slip on the output shaft, and ultimately cause damage
to the plunger arm.
Similarly, large damaging solids and debris may build in
the pump well and if not removed, may cause extreme
damage to the plunger arm and pump casing. If a jam
or suspected debris build-up occurs, the pump must be
thoroughly cleaned as described in the “Stalled/Stopped/
Damaging Debris” Section.
STALLED/STOPPED/DAMAGING DEBRIS
If pump has stalled, stopped, or has been engaged in
moving heavy debris laden fluids, perform the following
procedure:
1. Remove handle from pump. See Figure 6.
2. Remove the four hex head cap screws, hex nuts, flat
washers and lock washers from the pump base.
3. Push pump well downwards (Figure 23) to separate
from pump base.
4. Clean and remove all dirt and debris from pump well.
5. Align pump well, pump base, and diaphragm with
each other. Once all components have been properly
aligned, reinstall the four hex head cap screws, hex
nuts, flat and lock washers and tighten securely.
Figure 23. Pump Well (Clean-out)
CAUTION
During the course of pumping operations that include
heavy debris laden fluids, the pump well must be
checked for build-up of rocks, silt, sand and general
de-bris. Failure to clean out the pump cavity (well) could
result in damage to the plunger arm, and pump casing.
WARNING
Pump jamming with an over-torqued lock screw
(plunger arm) may cause internal damage. Under
torquing may allow the output shaft to spin and wear
parts prematurely causing replacement.