single pump assemblySHAFT END COVER SUBASSEMBLY1.Install buck-up rings (17) and shaft "O" ring (18)in gear side of shaft end cover (9).Fig. 3 Installing back-up ring2.install two new roller bearings (19, 33) in thebores of the cover-IF-the used ones wereremoved.Fig. 4 Installing roller bearings3.Place the shaft end cover (9) gear side up in avise having soft jaws and reassemble the twocheck valves for double rotation by inserting theball (35) into the check valve scat (36) andscrewing the check hall retainer (34) flush intothe check valve scat being sure the check ball isfree to move. Screw the two check valveassemblies into their respective holes,approximately two threads below face of shaftend cover (9). Single rotation units do notrequire check assemblies. Instead, a plug isinstalled on the high-pressure side of pump withFig. 5 Peening over check valve seatthe low-pressure side left open. Peen over thecheck valve seat and ball retainer to prevent thevalves from backing out.4.Remove shaft end cover (9) from vise. turnover, place in ;arbor press and press in oil seal(8) with the open side down facing toward thebearing bore.Fig. 6 Pressing in oil seal6
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