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MTH PUMPS D91 SERIES, Manual

The MTH Pumps D91 Series user manual is a valuable resource for those needing assistance with their D91 Series pump. It provides step-by-step instructions and essential information for optimal performance. Easily downloadable and completely free, this manual can be found on our website, manualshive.com. Ensure your pump operates at its best with our comprehensive manual.

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Section

D91

Page 501

Dated

June 2004

D91 SERIES

Pump Manual

HORIZONTAL CLOSE COUPLED

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Summary of Contents for D91 SERIES

Page 1: ...Section D91 Page 501 Dated June 2004 D91 SERIES Pump Manual HORIZONTAL CLOSE COUPLED ...

Page 2: ...s the lead pipe out of the pump discharge A check valve gate valve and a union should also be installed in the discharge line for pump throttling and servicing See Typical Piping Diagram ﬁgure 1 1 Make sure the discharge line is well supported NEVER use the pump as pipe support ELECTRICAL CONSIDERATIONS Electrical supply must be a separate branch circuit with fuses or circuit breakers Install a di...

Page 3: ...he four bolts holding the adapter to the motor The adapter which still has the stationary mem bers of the seal in it will now pull off the motor 13 Remove the stationary member of the seal and clean all the parts Be very careful not to scratch the seal face this will cause the seal to leak 14 To reassemble follow the direc tions in reverse D91EF Bronze Fitted 1 F E 1 9 D G N I S A C N O R I T S A ...

Page 4: ...as sized wrong the diameter is too small 5 Impeller is worn clearance opened up 6 Air or gas in the liquid 7 NPSHA is to low 8 Piping is undersized 9 The impeller has a vane or vanes plugged with debris 10 A strainer is partially plugged 11 Pump is undersized for the system 12 Phase loss one leg of a 3 phase motor went out C EXCESSIVE NOISE VIBRATION 1 Rotating parts are binding 2 Pump is cavitati...

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