Page 251 - Improving Machinery Reliability

222 Improving Machinery Reliability

face and coupling-hub bore. This can be accomplished by introducing the pressur-
ized fluid through a transverse passage drilled into the coupling hub.
Either a combination assembly/disassembly fixture, as shown in Figure 3-96, or a
pusher assembly in conjunction with hydraulic fluid injection through the shaft cen-
ter (Figure 3-97) can be used to mount and dismount the coupling hub.

Oil fitting for 0-50,000 psi
(0-3,450 bar)
Oil fitting for 0-10,000 psi
pump to operate piston

, Special coupling
nut used lo
assembly/
disassembly

Figure 3-96. Hydraulic hub dilation by direct injection.

FLEXIBLE HOSE
FOR 10,000 PSI
ADVANCING PRESSURE

FLEXIBLE HOSE FOR
35,000 PSI DILATION
PRESSURE

RIVERHAWK COMPANY
PUSHER ASSEMBLY

Figure 3-97. Hydraulic hub dilation by injection through shaft. (Courtesy of Riverhawk
Company, Utica, New York.)