Parker 221 Series, Owner'S Manual, Page: 20 / 56

Bulletin HY25-1135-M1/US
Owner’s Manual
Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654 USA
16
General Installation 6 and 8-Bolt PTOs
Filler Blocks / Spacers (7-A-XX & 8-A-XX)
Filler blocks may be required where it is necessary
to use a spacer to mount the PTO to a particular
transmission.
NOTE: When using 7-A & 8-A spacer, .050" max
gasket permissible between spacer and mounting
surface.
*A gasket must be used on both sides of all
spacers.
PTO Application and Adapter Assembly
Figure 17 illustrates typical adapter assembly
configurations. Some PTO applications require
adapter assemblies because it is impossible to
reach the PTO driver gear in the transmission with-
out this assembly. An adapter assembly will change
the rotation of the PTO and this may be necessary
for driving pumps or other accessory equipment.
Obstructions, such as bulge in the transmission,
exhaust pipes or motor mounts can sometimes be
compensated for through the use of an adapter.
Refer to Adapter Gears Owners Manual
HY25-1670-M1/US.
Adapter Plates
Adapter plates are used to permit mounting a 6-Bolt
PTO on a transmission that has an 8-Bolt
aperture.
Fig. 17
Fig. 18
Fig. 19