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1008 & 1010 Size Pumps

1008 & 1010 Size Pumps
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Installation and Service Instructions 1008 & 1010 Size Pumps Excellence at work. Excellence in life.

The Pumping Principle Tuthill internal-gear principle is based upon the use of a rotor, idler gear and crescent shaped partition that is cast integrally with the cover. (See accompanying figure). Thus, only two moving parts comprise this efficient pumping element. Power is applied to the rotor and transmitted to the idler gear with which it meshes. The space between the outside diameter of the idler and the inside diameter of the rotor is sealed by the crescent. When the pump is started, there is an increase in volume as the teeth come out of mesh. This creates a partial vacuum, drawing the...

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pipelines are installed, an inverted “U” bend should be incorporated in the suction line close to the pump to trap liquid in the pump for priming. The suction line must be kept free from air leaks and air pockets. When handling liquids of high viscosity, such as asphalt, heavy gear lubricants, linseed oil, Bunker “C” fuel oil, molasses, etc., the speed of the pumps and the running clearances are important. Consult Tuthill UK, whenever unusual conditions of speed, pressure, vacuum or viscosity are encounted. Before initial start of the pump, it is recommended that some of the liquid to be...

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WARNING Failure to follow these instructions could result in serious bodily injury or death. Do not attempt to work on any Tuthill pump installation before completing the steps below. Disconnect the drive so that it cannot be started while work is being performed. Review the Material Safety Data Sheet (MSDS) applicable to the liquid being pumped to determine its charaacteristics and the precautions necessary to ensure safe handling. Vent all pressure within the pump through the suction or discharge lines. All Tuthill pumps contain residual ISO 32 lube oil from the factory production test....

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8. The individual parts must now be inspected for damage. The keyway in the end of the rotor must be in good condition and there must not be any deep scratches or grooves on the following surfaces. • The ID surface of the housing and OD of the rotor • The end face of the rotor and OD of the idler • Both faces of the idler • The inside surfaces of the cover including surfaces on the crescent • Areas on the shaft of the rotor were the seal seats Inspection Check cover, housing, rotor and idler for wear, chipped or broken teeth. Drop off in capacity is generally caused by the abrasive action...

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Consult Tuthill for selecting the proper pump, size of motor, and pipeline size for your job with the following information. • Capacity required with max/min liquid temperatures when entering the pump • The viscosity at the minimum temperature • Total length of suction pipe and discharge pipe • Suction lift and height to which the pump must force the liquid 1008 Parts List Item

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Field Checklist What to look for when 1. No Oil is delivered • Suction lift too high for vapour pressures of liquid pumped • While Tuthill Pumps will develop as high as 27 inches of vacuum, it is wise to reduce the vacuum to a minimum • Bad leaks in suction line or port passages can be detected by submerging pressure line from discharge side of pump into a pail of oil where the air will be seen in the form of bubbles • Wrong direction of shaft rotation (In "R" models, check position of cover boss) • Pump shaft not rotating (Check coupling or drive) • Relief valve setting too low...

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The maximum vacuum at the pump suction should never exceed 15 inches of mercury. It is necessary to keep below 15 inches not because of the inability of the pump to handle a higher vacuum, but primarily because of the vaporization that is liable to take place at a higher vacuum. Vaporization caused by higher vacuums will generally result in capacity drop-off. 3. Pump Works Spasmodically • Leaky suction lines • Suction lift too high • Air or vapour in liquid • Coupling slipping on pump shaft. 4. Pump Wastes Power • Pressure too high • Liquid more viscous than desired • Suction or discharge...

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