Installing Pto - Allison Transmission 3000 Mechanic's Tips

c. Install Output Flange or Yoke.
• 3000 Product Family before S/N 6510184819 and
4000 Product Family before S/N 6610038064.
— Install flange or yoke onto output shaft. Install the large O-ring on the
retainer plug. Install a belleville washer on each bolt so that the coned
end of the washer contacts the underside of the bolt head. Insert two
bolt/washer assemblies into the bolt holes in the plug. Install a small
O-ring over the threads of each bolt, so that the O-ring seats against
the retainer plug. Install retainer plug and bolts into the flange or yoke.
— Tighten bolts to 30–35 N•m (22–26 lb ft) for a 3000 Product Family
transmission.
— Tighten bolts to 51–61 N•m (38–45 lb ft) for a 4000 Product Family
transmission.
— Rotate the flange or yoke to check for binding.
• 3000 Product Family beginning with S/N 6510184819 and
4000 Product Family beginning with S/N 6610038064
— Install flange or yoke onto output shaft. Install the large O-ring on the
retainer plug. Insert one bolt into the bolt hole in the plug. Install a
small O-ring over the threads of the bolt so that the O-ring seats
against the retainer plug. Install retainer plug and bolt into the flange
or yoke.
— Tighten bolt to 70–80 N•m (52–59 lb ft).
4–3. INSTALLING PTO
Access to the PTO mounting pads and the space available to maneuver the
transmission determine whether the PTO should be installed before or after the
transmission is installed.
CAUTION: DO NOT use cork or other soft gaskets to install the PTO.
Use only the shims/gaskets listed in the appropriate parts catalogs. Refer
to the Customer Service section, Table 8–1, for the current publication
number.
NOTE: DO NOT use sealing compounds—they are usually
incompatible with automatic transmission fluid.
56