Eaton Char-Lynn 5 Series Manual

8 EATON Char-Lynn Power Steering, Steering Control Units 001, 5 Series C-STCU-TS002-E August 2003Standard TorqueCentering Springsand SpacersSleevePinSpoolSpringRetainingRingDisassembly cont.7. Remove the pin that holdsthe spool and sleevetogether, see figure 3.8. Carefully slide the spool outof the sleeve. The springsand retaining ring will staywith the spool as it’sremoved.9. Remove the retaining ringand springs.Caution: The centeringsprings are under tension;remove the retaining ringcarefully.Figure 3Figure 4 Figure 5ReassemblyCheck all mating surfaces.Replace any parts withscratches or burrs that couldcause leakage. Wash all metalparts in clean solvent. Blowthem dry with pressurized air.Do not wipe parts dry withpaper towels or cloth as lintin a hydraulic system willcause damage.Note: Always use new sealswhen reassembling hydraulicsteering control units. Referto seal kit part numbers onpage 6.Important: During reassemblylubricate the new seals with apetroleum jelly such asVaseline®. Also lubricatemachined surfaces and bear-ings with clean hydraulic fluid.Reassembly10. Install the quad seal:• Put one of the bearingraces and sleeve intothe housing.• Together, the housing andbearing race create agroove into which the quadseal will be installed.• Hold the bearing race tightlyagainst the input end of thehousing by pushing on thegerotor end of the sleeve.• Fit the quad seal into itsseat through the input endof the housing. Be sure theseal is not twisted.• Remove the sleeve andbearing race.Reassembly11. Lubricate and install thedust seal (see Figure 4 forcorrect seal orientation).12. Install the centeringsprings in the spool. It isbest to install the two flatpieces first. Next, installthe curved pieces, threeat a time.13. Fit the retaining ring overthe centering springs.14. Apply a light coating ofclean hydraulic fluid to thespool and slide it into thesleeve. Be sure the center-ing springs fit into thenotches in the sleeve.15. Install the pin(see Figure 3).Reassembly16. Apply a light coating ofpetroleum jelly to theinner edge of the dustand quad seals.17. Put the thrust bearing andraces into the housing.The thrust bearing goesbetween the two races(see Figure 2).18. Apply a light coating ofclean hydraulic fluid tothe spool and sleeveassembly and slide itinto the housing.Important: Do not dam-age the dust or quadseals.19. Clamp the housing in avise as shown in Figure 5.Use just enough clampingforce to hold the housingsecurely.Quad SealDust Seal Thrust Bearingand Race (2)Round Housingwith End Ports