single pump assembly
SHAFT END COVER SUBASSEMBLY
1.
Install buck-up rings (17) and shaft "O" ring (18)
in gear side of shaft end cover (9).
Fig. 3 Installing back-up ring
2.
install two new roller bearings (19, 33) in the
bores of the cover-IF-the used ones were
removed.
Fig. 4 Installing roller bearings
3.
Place the shaft end cover (9) gear side up in a
vise having soft jaws and reassemble the two
check valves for double rotation by inserting the
ball (35) into the check valve scat (36) and
screwing the check hall retainer (34) flush into
the check valve scat being sure the check ball is
free to move. Screw the two check valve
assemblies
into
their
respective
holes,
approximately two threads below face of shaft
end cover (9). Single rotation units do not
require check assemblies. Instead, a plug is
installed on the high-pressure side of pump with
Fig. 5 Peening over check valve seat
the low-pressure side left open. Peen over the
check valve seat and ball retainer to prevent the
valves from backing out.
4.
Remove shaft end cover (9) from vise. turn
over, place in ;arbor press and press in oil seal
(8) with the open side down facing toward the
bearing bore.
Fig. 6 Pressing in oil seal
6
