Specifications

300 SERIES MAN HOLE DIGGER
FORM GOM12070702, VERSION 1.2
45
GASOLINE IS AN EXTREMELY FLAMMABLE
FUE L. U SE E XT R EME C A UT IO N W HE N
HANDLING GASOLINE. DO NOT SMOKE OR
BRING ANY FIRE OR FLAME NEAR THE
FUEL.
2) Split and separate the transmission cover and case.
Exercise caution not to damage the dowel pins.
Remove the primary gear and pinion assembly, PN
7034 and PN 345-0310.
3) Clean the transmission case with an appropriate
solvent.
Observe all applicable safety precautions for the
solvent.
4)
Using the 3/16 inch Allen wrench, remove the Allen
screw from the side of the transmission cover. This will
provide access for removing the centrifugal clutch rotor
and shoe assembly. FIGURE 37.
5) Using the 1/8 inch Allen wrench, loosen the two set
screws which retain the PN 330H-0175 rotor and shoe
assembly to the engine crankshaft. Removal of the
clutch rotor and shoe assembly may require the use of
a gear puller. FIGURE 38 and 39.
If a gear puller is necessary to remove the PN
330H-0175 rotor and shoe assembly from the
engine, exercise appropriate caution to minimize
the occurrence of any structural damage to the
rotor. Any structural damage to the rotor and shoe
assembly will require its replacement. Wear safety
eyewear and other, appropriate safety equipment.
Caution all onlookers about the possibility of flying
debris and the potential for personal injury.
FIGURE 37
FIGURE 38
6) Remove clutch drum and pinion assembly, PN 3516
and washer, PN 200682, from the transmission
driveshaft.
7) Inspect the engine crankshaft and PN 61 Woodruff
key for signs of cracks and other damage. Replace the
Woodruff key if wear and/or elongation are visible.
Measure the engine crankshaft with a micrometer. The
minimum
allowable crankshaft diameter is .868 inch
(22.0 mm). The maximum allowable TIR limit in the
gear pinion journal area of the crankshaft is .003 inch
(0.076 mm), relative to the crankshaft itself. Replace
the crankshaft assembly if it is not within this
established limit.