210 ONE MAN HOLE DIGGER, FORM GOM-1061-1189, VERSION 2.0, AUTHORIZATION: DVR, PAGE: 21
The 210 Hole Digger utilizes a fully enclosed, double
reduction transmission for multiplying and transmitting
engine torque to the auger. The principle involves
engine horsepower and torque being transmitted
through a centrifugal clutch and two sets of gear
reductions into a final driveshaft. Grease is provided for
lubrication and heat dissipation for the bearings, gears
and clutch assembly.
A pressure relief valve, PN 5677, is located on the top
surface of the transmission cover to relieve any excess
pressure created in the transmission due to heat rise.
Should this valve become plugged, the following
problems can occur:
1) Lubrication grease can be forced out between the
bearings and the final driveshaft.
2) The gasket that separates the two halves of the
transmission can push out, causing a loss of lubrication
grease.
The potential for these problems can be minimized by
cleaning the pressure relief valve at regular intervals
with an approved safety solvent. The transmission is
shipped from the factory filled with approximately 6
ounces (0.2 liter) of high temperature lubricant. This
lubricant contains an extreme pressure additive which
is designed to cling to the gear teeth at high rotational
speeds.
1) Change the transmission lubricant every 25 hours of
operation, or more often as necessary, if the Hole
Digger is operated in extremely dusty or dirty
conditions.
2) Drain the gasoline from the gasoline tank into a UL®
approved container. Refer to the material supplied by
the engine manufacturer for more detailed information.
3) Position the Hole Digger on a suitable work bench
with the operator handle level with the ground. Wipe
any dust or dirt from the area where the transmission
separates.
GASOLINE IS AN ETREMELY FLAMMABLE FUEL.
USE EXTREME CAUTION WHEN HANDLING
GASOLINE. DO NOT SMOKE OR BRING FIRE OR
FLAME NEAR THE FUEL.
4) Split and separate the transmission cover and case.
Exercise caution not to damage the dowel pins.
Remove the PN 210-0100 gasket. Remove the
primary gear and pinion assembly, PN 210-0340 and
PN 210-0310. FIGURE 12.
FIGURE 12
5) Clean the interior of the transmission cover and case
with an approved safety solvent.
Observe all applicable safety precautions for the
solvent. Dispose of the used transmission
lubricant according to all applicable laws and
regulations.
6) Fill the transmission cover and case with 6 ounces
(0.2 liter) of high temperature transmission grease
containing an extreme pressure additive. Part Number
210-0720 lubrication grease or Fisk Brothers GR-132
is an approved lubricant. FIGURE 13. Distribute the
grease equally around the gear teeth. Do not utilize
standard lithium based greases intended for common
lubrication purposes. These types of grease are not
formulated to operate at the higher operating
temperatures encountered during the hole digging
process. Such greases also do not contain an extreme
pressure additive for use with gears. FIGURE 14.
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