Crane DEMING 4111 Series User Manual

A Crane Co. Company
IMPORTANT! Read all instructions in this manual before operating pump.
As a result of Crane Pumps & Systems, Inc., constant product improvement program,
product changes may occur. As such Crane Pumps & Systems reserves the right to
change product without prior written notifi cation.
420 Third Street 83 West Drive, Bramton
Piqua, Ohio 45356 Ontario, Canada L6T 2J6
Phone: (937) 778-8947 Phone: (905) 457-6223
Fax: (937) 773-7157 Fax: (905) 457-2650
www.cranepumps.com
Form No. 120004-Rev. G
Series: 4111, 4121
4121H
DEMING
DEMING
®
INSTALLATION, OPERATION & MAINTENANCE MANUAL
End-suction Centrifugal Pumps
DISCONTINUED
Parts may
NOT be available
Manual Index

Crane DEMING 4111 Series Specifications

General

Brand	Crane
Model	DEMING 4111 Series
Category	Water Pump
Language	English

Summary

Safety First

Before You Begin

Installation

Foundation Requirements

Pump Placement and Foundation Bolts

Pump Alignment

Coupling Alignment

Align pump and motor shafts at the flexible coupling using a straight edge.

Alignment Recheck

Recheck alignment after grouting and correct any misalignment with shims.

Piping and Connections

Suction and Discharge Piping

Foot Valve and Check Valve

General Maintenance and Repair

Stuffing Box Adjustment

General Repairs and Cleaning

Ball Bearing Inspection and Replacement

Bearing Inspection and Replacement

Shaft and Bearing Reassembly

Stuffing Box Reassembly

Repacking Standard Stuffing Box

Mechanical Seal Replacement

Single Mechanical Seal Replacement

Double Mechanical Seal Replacement

Troubleshooting

No Liquid Delivered

Diagnose issues causing no liquid delivery, such as wrong rotation or priming problems.

Not Enough Liquid Delivered

Identify causes for reduced liquid delivery, like high discharge head or air leaks.

Not Enough Pressure

Troubleshoot low pressure issues, including air in water or small impeller diameter.

Pump Works Then Quits

Address intermittent pump operation, such as leaky suction lines or plugged suction.

Pump Takes Too Much Power

Diagnose excessive power consumption, like high speed or piping misalignment.

Start-Up Report

Pre-Startup Checks

Perform pre-startup checks for all pumps, including alignment and pipe support.

Submersible Pumps Checks

Electrical Resistance

Operational Checks

Verify noise, vibration, leaks, system flow rate, voltage, and amperage draw.

Submersible Pump Specifics

Check guide rails, pump seating, level controls, and submergence for submersible pumps.