Cincinnati 175 CB - Pump

4. Swing cylinder out from ram. Insert wooden block
between cylinder and housing so piston rod is clear of
ram, Figure 40.
5. Remove 6 or 8 bolts from seal retainer. Insert 3 or 4
3/8" xl" (or longer) set screws into tapped holes in
retainer. Tighten set screws to back-off retainer.
Support retainer to keep from falling free" Remove
seal retainer.
FIGURE 40
6. Remove seal from groove in bore of seal retainer. This
seal has an energizing noft ring to pre-load the seal.
Replace with a new seal. Also inspect non-metallic
bearing strip in bore of seal retainer and Uolt ring seal
in top face of retainer. Replace 'if necessary.
7" Using auto body slide hammer-puller, remove the piston
rod seal
t
Figure 41. This seal has no energizing flO"
ring. Be careful not to· damage finished surface of
piston rod or lower head s~eat.
8. Slide new piston rod seal over piston. rod and push into
lower head seat as far as possible. Replace piston rod
seal retainer, gradually tightening bolts to seat new
seal. See Cylinder assembly drawing included with this
manual for proper seating torque of these bolts.
9." Remove wood block and swing cylinder back into
position with ram.. Replace ram shoe and ram pin cover
plate.
Replacing Piston Seal Ring:
Because of high pre-load on cylinder tie rods, special
equipment is required to disassemble and reassemble the
cylinders. Contact CINCINNATI INCORPORATED Service
Department for further information.
25
PUMP (FIGURE 42)
The pump used is a "Balanced Vane Type" , high
performance, fixed displacement double pump with high and
low volume output sections. It is direct coupled and bolted
to the drive motor end belL
FIGURE 42