SERVICE MANUAL2.Remove the ball check valve retaining clip andremove and discard the rubber ball valve.3.Clean the desiccant plate thoroughly using aquality commercial solvent making sure thepurge orifice and check valve seat are clean.4.Install new ball check valve and replace theretaining clip and screw (Fig. 7).5.Thoroughly lubricate the two new o-rings andinstall them in their respective grooves in thepurge plate (Fig. 8).6.Set the desiccant sealing plate aside forreinstallation on the desiccant cartridge.Fig. 7 Installing Check ValveREPLACING DESICCANT CARTRIDGEIf the desiccant cartridge is to be replaced as anassembly rather than rebuilt (see desiccant cartridgerebuilding instructions), the cartridge removed from theair dryer may be discarded after the desiccant sealingplate is removed.The current revision replacement desiccant cartridgeis shown in Fig. 9. All prior revisions of the cartridge willinterchange with no modifications to either air dryer.Prior to installing the new replacement cartridge inthe air dryer, the following steps must be as follows:1.Carefully remove the lock nut from the cartridgebolt using an 11/16" open end or box wrench.Care must be taken not to allow the cartridgebolt to slip out of the cartridge when the lock nutis removed. Loss of desiccant material will occurshould this happen.2.Install the previously rebuilt desiccant sealingplate on the cartridge bolt so that the ball checkretaining clip remains visible (see Fig. 7).3.While holding the cartridge bolt, reinstall the locknut on the cartridge bolt.Fig. 8 Installing O-RingsFig. 9 Replacement Desiccant CartridgeIMPORTANTBefore tightening the lock nut down,make certain that the shoulder(unthreaded portion) of the cartridge boltextends slightly above the perforateddesiccant plate (see Fig. 14).CTS-4079 - CHAPTER XIV - Page 7
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