Specifications

I & M BULLETIN
HPTO8TD-100
HYDRAULIC POWER TAKE-OFF
Page 2 of 2
4. Check that the oil return line from the
clutch manifold will be isolated from any
return line that is pressurized.
ATTENTION: the oil return line from
the manifold must not be attached to
anything that could potentially
create pressure in the line. The
maximum height that the tank can be
mounted above the centerline of the
HPTO clutch is 4 feet. If tank is too
high, over pressurization of internal
shaft seals may result.
5. Verify that all hoses and fittings
(customer supplied) for making the
hydraulic connections to the HPTO
components are properly sized and
available. See supplied drawings for
fitting sizes.
HPTO INSTALLATION INSTRUCTIONS
For long, trouble-free life, the following
instructions should be adhered to:
1. Inspect and clean the mounting faces of
the engine flywheel and housing.
Threaded bolt holes should be clean
and free of debris.
Note: For flat “automotive” style
flywheels follow step 2; otherwise
proceed to step 3.
2. For automotive (flat) type flywheel size
12” or 13”, mount adaptor plate to
flywheel. Torque bolts to 44 lb-ft.
Consult PT Tech for adapter plate if
required.
3. Locate the flywheel mounting bolts
found in the plastic bag labeled,
“Flywheel Mounting Bolt”. They are
3/8-16 UNC by 2½ inch long hex head
cap screws.
4. Install flywheel ring gear to engine
flywheel using the “Flywheel Mounting
Bolts”. Torque all FLYWHEEL BOLTS
to 44 lb-ft. ATTENTION: do not
install washers under the heads of
the bolts, as this may cause
interference with the speed pickup
that is installed later.
5. Using the lifting plate and lifting straps
(not provided), raise the HPTO and
mount the housing of the HPTO to the
engine housing.
ATTENTION: the HPTO has two friction
plates. The gear teeth of the plate must
be aligned with the flywheel ring gear
while mounting the clutch to the engine
housing.
Note: Tilt shaft of HPTO up so friction
plate teeth engage drive ring. Rotate
HPTO down so friction plate teeth are
fully engaged.
WARNING: do not follow standard
Twin Disc practice by locking the disc
pack together. DO NOT plug manifold
drain port and pressurize or internal
damage WILL occur.
6. Locate the housing mounting bolts
found in the plastic bag labeled,
“Housing Mounting Bolts”. They are 3/8
– 16 UNC by 1 1/4 inch long hexhead
capscrews.
Note: 10 mm diameter mounting bolt
size may be required by some engine
manufacturers.
7. Install all housing bolts and torque all
HPTO HOUSING mounting bolts to 44
lb-ft.