240 ONE MAN HOLE DIGGER, FORM GOM26010601 VERSION 2.0, AUTHORIZATION: DVR, PAGE: 23
a) Lubrication grease can be forced out between the
ings and the final driveshaft.
b
) The gasket that separates the two halves of the
transmission can push out, causing a loss of lubrication
g
rease.
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 8
ounces (224g) 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 50 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 fuel tank into a UL®
approved container. Wipe any excess spilled gasoline
and dispose of properly.
3) Position the Hole Digger on a suitable work bench
with the operator handle level with the ground. As an
alternative, the transmission driveshaft can be securely
mounted in a suitable bench vice. Wipe any dust or dirt
from the area where the transmission separates.
GASOLINE IS AN EXTREMELY FLAMMABLE FUEL.
USE EXTREME CAUTION WHEN HANDLING
GASOLINE. DO NOT SMOKE OR BRING FIRE OR
FLAME NEAR THE FUEL.
4) Loosen and remove the six capscrews that fasten
the transmission together. Using the rubber hammer,
split and separate the transmission cover and case.
Exercise caution not to damage the dowel pins. If the
bearing journals of the secondary pinion, PN 210-
0310, are difficult to remove from the ball bearings,
remove the PN 37040200 Screw from both bearing
housings. Insert a 1/4-20 UNC capscrew into the
housing. Using the wrench, rotate the capscrew to
thrust against the pinion bearing journal until it clears
the pinion gear support bearing. Repeat the process
with the remaining pinion gear bearing journal if
necessary. FIGURE 13. Remove the PN 210-0100
gasket. Remove the primary gear and pinion
assembly, PN 210-0340 and PN 210-0310.
FIGURE 13
5) Clean the interior surfaces of the transmission cover
and case with an approved safety solvent.
6) Clean each gear with an approved safety solvent.
Inspect the teeth for excess wear, cracks or fatigue.
Replace each component as necessary.
Observe all applicable safety precautions for the
solvent. Dispose of the used transmission
lubricant according to all applicable laws and
regulations.
6) If necessary, reinstall PN 37040200 Screw into the
bearing housings.Properly secure with the provided
hardware.
7) Fill the transmission cover and case with 8 ounces
(224g) 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 14. If the Fisk
Brothers lubricant can not be readily sourced, an
acceptable alternative is a marine-grade wheel bearing
grease that contains an EP (denoting extreme
pressure) additive. Distribute the grease equally
around all 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.
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