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ASSEMBLY (cont) - TM-5-4210-220-34_128
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TM-5-4210-220-34 Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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ASSEMBLY (CONT) - TM-5-4210-220-34_130
TM 5-4210-220-34 2-13. FIRE PUMP - Continued (12)  Slide tab waster (30) onto pump shaft (38) with the curve of the base facing upwards.  Make sure the single center tab on tab washer is fully engaged with pump shaft groove. (13)  Slide  locknut  (29)  down  pump  shaft  (38).    Make  sure  chamfered  side  of  locknut  faces  tab  washer  (30). Thread locknut onto pump shaft threads, handtight. (14)  Position pump shaft support fixture (3, Appendix D) horizontally in a vise.  Lower pump shaft into the pump shaft support fixture, engaging the impeller splines with the splines in the tool. (15)  Using a spanner wrench tighten locknut (29) firmly.  Tap one lock tab on the tab washer (30) into groove on locknut. (16)  Remove socket screw (32) from revolution counter gear (33).  Apply threadlock liquid (item 29,  Appendix B) to socket screw.  Install into revolution counter gear and tighten firmly.  Make sure socket screw enters the pump shaft groove. (17)  Remove gaskets (34 and 39) from pump shaft.  Apply gasket eliminator to both sides of each gasket. (18)  Slide gaskets (34 and 39) into position on bearing mount (35).  Make sure gaskets do not cover the oil drain area on the facing of the bearing mount. (19)  Carefully slide pump shaft assembly into bearing housing (26) from the impeller end.  Make sure the oil drain cut away on the bearing mount (35) is alined with three oil drain holes located in the bottom of the bearing housing. (20)  Apply a thin coating of gear oil (item 15, Appendix B) to the oil seal face of the pump shaft (38). (21)  Install new seal (40) into seal housing (43).  Make sure the seal lip faces inwards towards the spigot in the bearing housing (26). (22)  Slide seal housing (43) over pump shaft (38) and up to bearing mount.  Make sure mounting holes are alined with gasket (39) and bearing mount (35). (23)  Secure  the  seal  housing  (43)  to  the  bearing  housing  (26)  using  four  capscrews  (42)  and  new  tab  washers (41).  Tighten four capscrews to 24 ft lb (33 Nm).  Make sure tab washer contacts the outer rim of the seal housing and a flat on the capscrew heads. (24)  Apply grease (item 16, Appendix B) to pump shaft bearing seat and to the inner diameter of the bearing (23). (25)  Fit  bearing  (23)  onto  bearing  installing  tool  (5,  Appendix  D),  and  slide  onto  pump  shaft  (38).  Make  sure narrow face of bearing is installed first. (26)  Next  install  tab  washer  (22)  and  locknut  (21)  and  tighten  using  a  spanner  wrench.    It  will  be  necessary  to attach pump shaft support fixture (3, Appendix D) to pump shaft impeller end to prevent shaft rotation while tightening locknut (21).  Remove locknut, washer, and bearing installing tool (5, Appendix D) from pump shaft once bearing (23) is installed. 2-129

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