Abstract: Valve heads for modifying a pump to handling corrosive liquids are made of the thermoplastic UHMW-PE machined into a generally rectangular block having longitudinally extending front, back, and opposite side faces and transversely extending top and bottom faces, each of the faces being smooth and flat for convenient handling and storage. Each modified valve head is provided with an elongated cylindrical valve chamber adapted to slidably receive the standard valve body and a frusto-conical manifold recess intersecting and communicating with the valve chamber and having an outer opening that opens out of its front face. Inlet and outlet ports extend from opposite side faces through the valve head and communicate respectively with the lower and upper ends of the valve chamber.

Abstract: An agricultural combine is provided with electronic controller cards for assisting in controlling and monitoring the combine. The cards are housed in an enclosure located adjacent to the operator's cab above the ground engaging wheels. The enclosure comprises a box mounted in an aperture formed in the supporting structure and a cover which can be latched to the box. The cover is provided with a number of inwardly extending fingers each having a receiving groove for holding the electronic controller cards. The fingers are arranged in pairs for engaging the cards between the fingers. Openings in the cover are located adjacent to each finger pair for providing an opening through which the electronic controller car held therein can communicate with the wiring harness of the combine. Each opinion is provided with an outwardly extending and encircling flange which engaged a rubber boot of the wiring harness.