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CHAPTER 1. INTRODUCTION - TM-5-4320-254-140029
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TM-5-4320-254-14 Pump Centrifugal Gasoline Engine Driven (MIL STD) 600 GPM (E.C. Schleyer Pump (O. Model 36M-SPS3011G-T) Manual
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PARTS
FIGURE 1-2. PUMPING ASSEMBLY, RIGHT FRONT 3/4 VIEW
1-3. EXPLANATION OF TERMS AND ABBREVIATIONS
There are certain terms and abbreviations specifically used for the installation, operation, and maintenance of
these self-priming centrifugal pumps; therefore, an explanation of such terms and abbreviations will aid in clarifying their
use and avoid possible confusion.
A.
TERMS
AIR-BIND or AIR-LOCK - A condition where air accumulates or is entrapped. This can prevent the pump from priming or
delivering water.
AIR-TIGHT or COMPLETELY TIGHT - Usually referring to Joints or fittings on the suction (inlet) side of the pump and
the suction line. If any Joint, fitting, or line on the suction side of the pump should allow any air to enter the pump during
the priming cycle, the pump will not become primed, and after the pump has been primed the air will slow down or even
stop the flow of water from the discharge of the pump.
BREAK-SUCTION - Air entering pump during the operating cycle will interrupt the flow of solid water to the inlet. Usually
caused by suction line not properly submerged and/or a vortex at the water source or through an inadequate supply of
water for the suction line (low water level).
DISCHARGE - That in which pump discharge is involved, the spilling of water from the end of the discharge line, the
expelling of air or water, the flow of water or flow rate. Also the outlet of the pump.
FREE-FLOW - The unrestricted, free flowing delivery from the discharge of the pump or discharge line. The ability of air
or water to freely move out of the discharge line without any humps, kinks, or other restrictions.
KINK - Any restriction or "knotty" or kinky condition preventing the free flow of air and/or water.
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