Allied Ho-Pac NT8900 Series, Technical Manual

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3. For base plate bolts only, apply a
commercial grade, thread adhesive.
Follow manufacturer’s recommenda-
tions. (Example: Loctite 271 Thread
Adhesive/Sealant)
4. Initially tighten the bolts to 10 ft-lbs
(14
N-m).
5. Tighten the fasteners according to
the table below.
Diameter FinalTorque-Lubricated
3/8 inch
35 ft-lbs ( 47 N-m)
1/2 inch 80 ft-lbs (108 N-m)
5/8 inch 170 ft-lbs (230 N-m)
7/8 inch 400 ft-lbs (542 N-m)
1 inch 650 ft-lbs (880 N-m)
6. After bolt installation, operate the
Ho-Pac a few hours, then re-check
bolt torques.
11.7 Bearing Failure & Replacement
Because of the high loads and rotational
speeds, bearing failure is usually sudden.
A scraping or rattling sound is an
indication of imminent bearing failure.
Visually inspect the bearings for broken
or damaged components to determine if
replacement is necessary.
Bearing service shall be performed in a
properly equipped workshop. Use of a
manual arbor press is recommended. Do
not attempt to replace bearings in the
field.
~CAUTION~
Use only Allied replacement parts.
Removal:
1. Remove hydraulic hoses from motor.
2. Remove the cover plate, hydraulic
motor and adapter plate.
3. Remove bearing housing assembly
from the main housing. It is not
necessary to remove eccentric from
main housing.
~WARNING~
Be careful that eccentric shaft does not
fall and injure hands or fingers.
4. Remove the bearing from the housing
by pressing on the bearing inner race
from the interior side of the bearing
housing. Properly support the
bearing housing in the press.
5. If the outer race remains in the
housing, do not pry out. Carefully
place a small bead of weld, 1/8 inch (3
mm) along the inside diameter of the
outer race. After the weld cools, the
outer race can easily be removed.
Installation:
1. Thoroughly clean the bearing
housing and eccentric shaft.
2. Pack the bearing with grease.
3. Slowly press the bearing into the
housing. Apply contact pressure to
the outer race only.
4. Install one bearing and housing onto
the eccentric shaft.
5. Align in main housing.
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