SERVICE MANUAL MOYNO > 1000 Pumps >

The Moyno 1000 pump is the most versatile positive displacement pump available. Its design parameters have been proven in thousands of applications over the past 60 years, and it is backed by this same half century-plus of experience in application and manufacturing know-how. The Moyno 1000 pump is a progressing cavity pump. The pumping action is created by a single helical rotor rolling eccentrically in the double-threaded helix of the stator. In its revolution, the rotor forms, in conjunction with the stator, a series of sealed cavities 180 degrees apart. As the rotor turns, the cavities progress...

and other metallic parts in contact with the material being pumped. The third letter indicates the material of the stator. It identifies only the stator material and not that of the tube in which the stator is placed. The tube, a non-wetted part, is always alloy steel. A typical designation such as the CDQ used in our example would result in the following: C = Cast iron suction chamber D = Hardened alloy steel internals including drive shaft, connecting rod, pins, and rotor Q = Nitrile (NBR) stator (70 durometer hardness) The following letters identify the materials used in standard construction:...

Before putting the pump into operation, the following items should be checked to ensure that each piece of equipment is installed correctly: -Pump, driver, coupling, or sheave alignment. -Electrical connections. -Gauges and other instruments. -Pump rotation. Rotation is indicated on the pump nameplate. -Belt tension on belt driven units. There should be no appreciable deflection when first starting up. -All valves should be open on both suction and discharge sides of pump. -Seal flush systems if required should be operational. Double seals require flushing between faces. The Moyno 1000 pump has...

Note: In this section, the first reference to each pump part will be followed by a number or a letter in parentheses ( ). These numbers and letters are those used to identify the pump parts and hardware items in the Exploded Views in Section 4-43. When leakage can no longer be regulated by tightening the gland nuts, remove and replace the packing. The entire pump need not be disassembled to replace the packing. Briefly, replace as follows: 1. Remove packing gland nuts and lock washers and slide gland (0900) and slinger ring (6800) back along drive shaft (6000). 2. Use a packing puller tool (see...

3. Remove top half of stator support (1700). 4. Unbolt stator clamp ring (1800) from suction housing, remove stator from rotor, turning stator while removing will ease disassembly. Use a screwdriver tip to carefully remove the stator retaining ring. Remove stator clamp ring (1800) from stator (6500). See Figure 4-3 for the typical retaining ring removal procedure. 1. Remove the drive shaft head snap ring (J) sliding it back towards the bearing housing. Some models may have spiral type rings (see Figure 4-3). 2. Tap the retaining ring towards the bearing housing, exposing the edge of the universal...

8. Remove shaft pin (2000). 9. Pull intermediate shaft from bearing housing assembly (2100). 10. Inspect the sealing O-ring (2200) and replace if worn or damaged. 11. Remove mechanical seal and seal housing from bearing housing, or remove packing stuffing box from bearing housing. 12. Remove bearing cover screws and lock washers. Note: Ball bearing models do not have a bearing cover. A bearing housing snap ring, located at the drive shaft end of the bearing housing, is used to position the drive shaft and bearings. Remove this snap ring. 13. Slide bearing cover (0300) with grease seal (B) and...

4-27b. Tapered Roller Bearing Models 6) Place assembled drive shaft into bearing housing. Secure by inserting second bearing housing snap ring in groove in stuffing box end of bearing housing. 1) Install bearing housing retaining ring in bearing housing groove. 2) Press grease seal into grease seal housing and assemble in housing with chamfered side of grease seal housing facing bearing location. 3) Slide bearing cup into the bearing housing against the seal housing. 4) Press bearing cone on shaft approximately .150 in. beyond snap ring groove. 5) Place grease retainer on shaft and install shaft...

2. Measure the gap between the bearing cover and the bearing housing. 3. Remove bearing cover and add shims (6700) to equal gap measured in step 2 plus an additional .010 in. 4. Install bearing cover with shims and tighten screws evenly, opposite each other. 5. Tap lightly on the shaft head or end using a soft mallet. Rotate shaft to free upӔ assembly. You should be able to rotate the shaft by hand. 6. Shims may be added or subtracted to get the proper setting. 7. Slide the rubber pin retainer on the drive shaft pushing past the pin hole. 4-30b. Mechanical Seal Installation (Double Seal) 1. Press...

2. Fold other end of seal back towards center of connecting rod. 3. Spread head snap ring (J) ends and place on drive shaft between drive shaft head and stuffing box. 4. Place head O-ring (K) in matching groove on drive shaft head. 5. Fill shaft head with a good grade of EP (Extreme Pressure) lithium soap-base grease such as Shell Alvania EP1 (Shell Oil Co.), Texas Refinery Corp. 880 Crown and Chassis grease, or equivalent. 6. Slide retaining ring (6100), chamfered end first, over universal joint seal on to connecting rod. 7. Place end of connecting rod in drive shaft head and align holes. Coat...

3. Check complete pump installation per INSTALLATION instructions. (Sections 2-1 through 2-9) 4. Review OPERTAION instructions per Sections 3-1 through 3-4. > The Moyno 1000 pump has been designed and built to minimize overall operating costs. All wearable parts are replaceable. A recommended inventory of spare parts is dependent upon the application and the importance of continued operation. To minimize down time, we recommend the following quantities of spare parts be stocked. 1 Rotor 2 ֖ Head O-Rings 2 Head Snap Rings 1 ֖ Stator 2 Stator Gaskets 1 ֖ Connecting Rod 2 Universal Joint Seals*...