SERVICE MANUALIMPORTANTThe front and rear end plates aredifferent and must be assembled in theirproper locations for the pump to functioncorrectly. As shown in Figure 26, thefront end plate for clockwise rotationpumps contains the oil grooves. Forcounter clockwise pumps, the end platewithout the oil grooves is the front endplate. A correct assembly will align theend plate O.D. large open slots with thelarge shallow pump housing pocketports. The end plate gasket side will beaway from the pumping elements.Fig. 26 End Plate Identification1Oil Grooves2Grooved End Plate3No Groove End PlateIMPORTANTTwo different types of end plates andgaskets are used in this pump assembly.They may be identified by the shape of thegasket grooves in the end plate surface.As illustrated in Figure 27, one type of endplate uses a circular gasket which must beformed into the end plate grooves. Theother type uses a pre-formed gasketmoulded in the shape of the end plategrooves. Determine which type of end plateis used in the pump being serviced. Thedifferent types of gaskets are notinterchangeable.Fig. 27 End Plato and Gasket Identification1Circular Gasket2Pre-formed Gasket3Different on Each Side4Same on Both Sides2.Install locating pin in pump housing, Figure 28.If housing is drilled to accept two pins, install pinin original location as marked duringdisassembly.Fig. 28 Locating Pin in Housing1 Locating PinCTS-4027- Page 17PRINTED IN UNITED STATES OF AMERICA
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