Twin Disc MG-5170DC, Service Manual

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Twin Disc, Incorporated
Disassembly
Marine Transmission Service Manual #1020667
C. Carefully apply compressed air to hydraulic pressure port to force
piston from piston bore. Remove clutch piston.
Figure 52. Removing Clutch Piston
D. Remove piston ring from ring groove in shaft (seals I.D. of clutch
piston) and piston ring from ring groove in O.D. of clutch piston.
Note: Do not separate clutch housing/transfer gear from the
secondary shaft unless the shaft or the clutch housing must
be replaced and the mating part remains serviceable. Use
the following procedure to separate the housing/transfer
gear from the primary or secondary shaft :
9. To remove clutch housing, place shaft and clutch housing on a press,
front end of shaft down. Place a sleeve over input front end of shaft with
an I.D. only slightly larger than the O.D. of the shaft taper large end
[95.25mm (3.75 in.)]. Rest one end of sleeve on a heavy wood block
while the other end supports the inner face of the clutch housing. Apply
press force to rear end of shaft to separate shaft from clutch housing.
The shaft must be protected and restrained to prevent damage as the
tapered joint separates.