Oberdorfer™ has a long history of supplying pumps to the welding machine industry. Ever since the Heliarc welding tech- nology was developed, Oberdorfer™ pumps were used to circu- late cooling liquid to the welder’s torch.

Pump and electric motor are usually mounted on top or on the side of the coolant tank. A pressure relief valve built into the pump returns excess liquid directly to the tank rather than to the suction side of the pump, thus avoiding heat build-up in the pump.

Pump models N1000R39 and N1000R-66* are coupled to the electric motor with a flexible coupling. The N95060GEC03 and N95060GFC01 models are close-coupled to a carbonator motor by a circular clamp arrangement, offering a space-saving, compact design alternative. Pump model N95060GE is a retro- fit for Miller Electric Mfg. Co.

The reasons for the wide acceptance of Oberdorfer™ pumps in the welding machine industry are reliability, long serv- ice life, and ease of maintenance. The pumps depicted on this page are being produced in quantities for several welding machine manufacturers in the U.S.A.

PUMP MAINTENANCE AND REPAIR

Oberdorfer™ gear pumps are essentially maintenance-free. If the pump is to be shut down for an extended period of time, it should be flushed thoroughly and filled with lubricating oil.

As a general rule, it is seldom economical to repair a worn out gear pump. However, if the gear chamber inside the pump body is still in good condition, the replacement of all interior parts by use of a repair kit may restore up to 80% of the original pump performance. Repair kit numbers and parts contained in each kit are listed on the parts lists on the reverse side.