Specifications

300 SERIES MAN HOLE DIGGER
FORM GOM12070702, VERSION 1.2
43
the machined shoulder. Cocking the seal in the housing
contributes to oil seal failure. The tool is approximately
2.431 inches (61.7 mm) outside diameter. The inside
diameter of the tool is approximately 2-1/4 inches.
Apply the face of the service tool to the crimped bead
of the oil seal, inasmuch as pressure too close to the
center of the seal will distort or damage it. FIGURE 34.
FIGURE 34
If an arbor press is not available, the oil seal may be
tapped
in place with the same service tool or a thin,
wooden block and plastic hammer. Take care to
position the seal against the machined shoulder with
the bore at right angles to the shaft. Cocking the seal in
the housing contributes to oil seal failure. UNDER NO
CIRCUMSTANCES SHOULD THE OIL SEAL
RECEIVE DIRECT HAMMER BLOWS. FIGURE 35.
FIGURE 35
15) Reinstall the upper bearing cone, Nilos ring and
W
oodruff key on the final driveshaft. Coat the Woodruff
key area of the driveshaft with light oil or with the
Barium or Lithium based lubricant. Reinstall the
secondary gear and flat washer.
16) Apply a small amount of anaerobic
adhesive/sealant to the protruding threads of the final
driveshaft. Torque the 1-1/4 inch self-locking nut to 60-
70 foot pounds (81-95 N.m). Check to determine the
flat
washer is tight against the secondary gear and it, in
turn, is seated against the Nilos ring. If not fully seated,
use a thin, wooden block and a plastic hammer to tap
the gear down into place. UNDER NO
CIRCUMSTANCES SHOULD THE SECONDARY
GEAR RECEIVE DIRECT BLOWS FROM A STEEL
HAMMER. Tap both ends of the driveshaft with a
plastic hammer to help set the bearings. Loosen the 1-
1/4 inch self-locking nut and retorque to 60 foot pounds
(81 N.m.). Again, check to determine the flat washer is
tight against the secondary gear. Tap both ends of the
driveshaft with a plastic hammer to help set the
bearings.
17) Attach the torque wrench and 1-7/16 inch socket to
the 1-1/4 inch self-locking nut and rotate slowly. A
MAXIMUM bearing drag of 30 INCH POUNDS (3.4
N.m.) is permitted. This value should allow a
MAXIMUM of .003 inch (0.076 mm) freeplay in the
bearings. A greater amount of bearing drag will
significantly decrease the load capacity of the bearings
and contribute to premature bearing failure. Adjust the
torque value of the self-locking nut to yield a bearing
drag within the allowable limit. THE FLAT WASHER
MUST BE TIGHT AGAINST THE SECONDARY GEAR
AND THE GEAR TIGHT AGAINST THE NILOS RING
TO PREVENT DRIVESHAFT FREEPLAY THAT
EXCEEDS THE ALLOWABLE LIMIT. If the bearing
drag value is less than or greater than the 30 inch
pound (3.4 N.m) figure, readjust the self-locking nut
torque value accordingly to help produce the desired
value. FIGURE 36.