ABCE OM-00749-04 December 3, 1979 Rev. B 03-14-05 INSTALLATION, OPERATION, AND MAINTENANCE MANUAL WITH PARTS LIST 80 SERIES PUMP MODEL 81 1/2D3-B THE GORMAN-RUPP COMPANY MANSFIELD, OHIO www.gormanrupp.com GORMAN-RUPP OF CANADA LIMITED ST. THOMAS, ONTARIO, CANADA Copyright by the Gorman-Rupp Company Printed in U.S.A.
TABLE OF CONTENTS INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PAGE I − 1 SAFETY - SECTION A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PAGE A − 1 INSTALLATION − SECTION B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PAGE B − 1 Pump Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TABLE OF CONTENTS (continued) PUMP MAINTENANCE AND REPAIR - SECTION E . . . . . . . . . . . . . . . . . PERFORMANCE CURVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PARTS LIST: Pump Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PUMP AND SEAL DISASSEMBLY AND REASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . Pump Casing and Vane Plate Removal . . . . . . . . . . . .
80 SERIES OM−00749 INTRODUCTION Thank You for purchasing a Gorman-Rupp pump. Read this manual carefully to learn how to safely install and operate your pump. Failure to do so could result in personal injury or damage to the pump.
80 SERIES OM−00749 SAFETY - SECTION A This information applies to 80 Series basic pumps. Gorman-Rupp has no control over or particular knowledge of the power source which will be used. Refer to the manual accompanying the power source before attempting to begin operation. Because pump installations are seldom identical, this manual cannot possibly provide detailed instructions and precautions for each specific application.
OM−00749 If this pump is used with volatile and/or flammable liquids, overheating may produce dangerous fumes. Take precautions to ensure the area surrounding the pump is adequately ventilated. Allow the pump to cool and use extreme caution when venting the pump, or when removing covers, plates, plugs, or fittings. 80 SERIES of time.
80 SERIES OM−00749 INSTALLATION − SECTION B Review all SAFETY in Section A. Since pump installations are seldom identical, this section offers only general recommendations and practices required to inspect, position, and arrange the pump and piping. specific application. Since the pressure supplied to the pump is critical to performance and safety, be sure to limit the incoming pressure to 50% of the maximum permissible operating pressure as shown on the pump performance curve (see Section E, Page 1).
OM−00749 PREINSTALLATION INSPECTION The pump assembly was inspected and tested before shipment from the factory. Before installation, inspect the pump for damage which may have occurred during shipment. Check as follows: a. Inspect the pump for cracks, dents, damaged threads, and other obvious damage. b. Check for and tighten loose attaching hardware. Since gaskets tend to shrink after drying, check for loose hardware at mating surfaces. c.
80 SERIES Materials Either pipe or hose maybe used for suction and discharge lines; however, the materials must be compatible with the liquid being pumped. If hose is used in suction lines, it must be the rigid-wall, reinforced type to prevent collapse under suction. Using piping couplings in suction lines is not recommended. Line Configuration Keep suction and discharge lines as straight as possible to minimize friction losses.
OM−00749 If there is a liquid flow from an open pipe into the sump, the flow should be kept away from the suction inlet because the inflow will carry air down into the sump, and air entering the suction line will reduce pump efficiency. If it is necessary to position inflow close to the suction inlet, install a baffle between the inflow and the suction inlet at a distance 1-1/2 times the diameter of the suction pipe.
80 SERIES OM−00749 friction losses. Never install a throttling valve in a suction line. With high discharge heads, it is recommended that a throttling valve and a system check valve be installed in the discharge line to protect the pump from excessive shock pressure and reverse rotation when it is stopped. If the application involves a high discharge head, gradually close the discharge throttling valve before stopping the pump.
OM−00749 80 SERIES MISALIGNED: SHAFTS NOT PARALLEL MISALIGNED: SHAFTS NOT IN LINE ALIGNED: SHAFTS PARALLEL AND SHEAVES IN LINE Figure 3C. Alignment of V-Belt Driven Pumps Figure 3B. Aligning Non-Spider Type Couplings Align non-spider type couplings by using a feeler gauge or taper gauge between the coupling halves Tighten the belts in accordance with the belt manufacturer’s instructions.
OM−00749 80 SERIES OPERATION − SECTION C Review all SAFETY information in Section A. PRIMING Follow the instructions on all tags, labels and decals attached to the pump. Install the pump and piping as described in INSTALLATION. Make sure that the piping connections are tight, and that the pump is securely mounted. Check that the pump is properly lubricated (see LUBRICATION in MAINTENANCE AND REPAIR).
OM−00749 80 SERIES STARTING OPERATION Consult the operations manual furnished with the power source. Lines With a Bypass If the pump has been approved for use with petroleum products, be sure the pump unit is properly grounded before operation. See GROUNDING, Section B. Rotation The correct direction of pump rotation is counterclockwise when facing the impeller .If the pump is operated in the wrong direction, the impeller could become loosened from the shaft and seriously damage the pump.
OM−00749 80 SERIES against closed valves could bring the liquid to a boil, build pressure, and cause the pump to rupture or explode. If overheating occurs, stop the pump and allow it to cool before servicing it. Refill lift, and should then stabilize. If the vacuum reading falls off rapidly after stabilization, an air leak exists. Before checking for the source of the leak, check the point of installation of the vacuum gauge. the pump casing with cool liquid.
OM−00749 80 SERIES curately by placing a contact-type thermometer against the housing. Record this temperature for future reference. rect level (see LUBRICATION in Section E). Bearing overheating can also be caused by shaft misalignment and/or excessive vibration. A sudden increase in bearing temperatures is a warning that the bearings are at the point of failing to operate properly.
80 SERIES OM−00749 TROUBLESHOOTING − SECTION D Review all SAFETY information in Section A. Before attempting to open or service the pump: 1. Familiarize yourself with this manual. 2. Lock out or disconnect the power source to ensure that the pump will remain inoperative. 3. Allow the pump to completely cool if overheated. 4. Check the temperature before opening any covers, plates, or plugs. 5. Close the suction and discharge valves. 6. Vent the pump slowly and cautiously. 7. Drain the pump.
OM−00749 TROUBLE PUMP STOPS OR FAILS TO DELIVER RATED FLOW OR PRESSURE (cont.) 80 SERIES POSSIBLE CAUSE Suction intake not submerged at proper level or sump too small. Check installation and correct submergence as needed. Impeller or other wearing parts worn or damaged. Replace worn or damaged parts. Check that impeller is properly centered and rotates freely. Check strainer and clean if necessary. Free impeller of debris. Strainer clogged. Impeller clogged.
80 SERIES OM−00749 PREVENTIVE MAINTENANCE Since pump applications are seldom identical, and pump wear is directly affected by such things as the abrasive qualities, pressure and temperature of the liquid being pumped, this section is intended only to provide general recommendations and practices for preventive maintenance. Regardless of the application however, following a routine preventive maintenance schedule will help assure trouble-free performance and long life from your Gorman-Rupp pump.
OM−00749 80 SERIES PUMP MAINTENANCE AND REPAIR − SECTION E MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK OPERATING PERFORMANCE. STANDARD PERFORMANCE FOR PUMP MODEL 81 1/2D3−B Based on 70 F (21 C) clear water at sea level with minimum suction lift. Since pump installations are seldom identical, your performance may be difference due to such factors as viscosity, specific gravity, elevation, temperature, and impeller trim.
OM−00749 80 SERIES SECTION DRAWING PARTS PAGE Figure 1.
OM−00749 80 SERIES PARTS LIST Pump Model 81 1/2D3-B (From S/N 359802 up) If your pump serial number is followed by an N", your pump is NOT a standard production model. Contact the Gorman-Rupp Company to verify part numbers. ITEM NO.
OM−00749 PUMP AND SEAL DISASSEMBLY AND REASSEMBLY Review all SAFETY information in Section A. Follow the instructions on all tags, label and decals attached to the pump. This pump requires little service due to its rugged, minimum-maintenance design. However, if it becomes necessary to inspect or replace the wearing parts, follow these instructions which are keyed to the sectional view (see Figure 1) and the accompanying parts list.
80 SERIES OM−00749 Impeller Removal Immobilize the impeller by wedging a block of wood or a brass rod between the vanes. Remove the impeller jam nut (28). Install the shaft key (18). Install a lathe dog on the drive end of the shaft (19) with the V" notch positioned over the shaft key. With the impeller rotation still blocked, see Figure 2 and use a long piece of heavy bar stock to pry against the arm of the lathe dog in a counterclockwise direction (when facing the drive end of the shaft).
OM−00749 80 SERIES If bearing replacement is required, use a bearing puller or an arbor (or hydraulic) press to remove the bearings from the impeller shaft. To prevent damage during removal from the shaft, it is recommended that bearings be cleaned and inspected in place. It is strongly recommended that the bearings be replaced any time the shaft and bearings are removed.
80 SERIES OM−00749 When installing the bearings onto the shaft, never press or hit against the outer race, balls, or ball cage. Press only on the inner race. Slide the shaft and assembled bearings into the bearing housing until the inboard bearing (14) is fully seated against the bore shoulder. When installing the shaft and bearings into the bearing bore, push against the outer race. Never hit the balls or ball cage. Install the same thickness of bearing adjusting shims (21) as previously removed.
OM−00749 80 SERIES RETAINER ROTATING ELEMENT BELLOWS INTERMEDIATE IMPELLER IMPELLER SHAFT STATIONARY ELEMENT IMPELLER SHIMS SEAL WASHER SPRING SEAT SPRING DRIVE BAND STATIONARY SEAT Figure 3. 25271−821 Seal Assembly SPRING This seal is not designed for operation at temperatures above 160 F (71 C). Do not use at higher operating temperatures. Install the stationary seat element in the stationary seat.
80 SERIES Vane Plate and Pump Casing Installation Apply ‘3-M Adhesive EC-847’ or equivalent compound to the back of the vane plate, and secure the vane plate to the intermediate with the hardware (5 and 6). Check impeller-to-vane plate clearance as described in Impeller Installation. Install the vane plate O-ring (25) and the pump casing gasket (7). Carefully slide the pump casing over the vane plate, and secure it to the intermediate with the nuts (9).
For U.S. and International Warranty Information, Please Visit www.grpumps.com/warranty or call: U.S.: 419−755−1280 International: +1−419−755−1352 For Canadian Warranty Information, Please Visit www.grcanada.com/warranty or call: 519−631−2870 THE GORMAN-RUPP COMPANY D MANSFIELD, OHIO GORMAN-RUPP OF CANADA LIMITED D ST.
