Application Theory & Techniques - Brave 200 Series Operator's Manual

Two-man augers
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200 SERIES TWO-MAN AUGERS
FORM GOM08042004US, VERSION 1.1
1.
Use extreme caution handling gasoline. Always use UL, CSA or UN
marked, European ADR regulation approved container for storage and
transportation of fuel. Shut engine off and allow to cool before fueling.
Never remove fuel tank filler cap or fill fuel tank while engine is running.
Never operate engine without fuel tank filler cap. Select bare ground for
fueling and move at least 10 feet (3.05 M) from fueling spot before
starting engine.
2.
Carefully clean filler cap and surrounding area to prevent dirt/debris
falling into fuel tank.
3.
Fill fuel tank with fresh, clean, unleaded automotive gasoline. Leaded
"regular" grade gasoline is acceptable substitute. DO NOT USE
GASOLINE CONTAINING METHANOL (WOOD ALCOLHOL). Gasoline
containing maximum 10 percent ethanol/grain alcohol (sometimes
referred to as Gasohol) may be used but requires special care when
storing engine for extended periods.
NOTE: DO NOT use gasoline left over from previous season for easier engine
start-up and prevent poor engine performance.
4.
DO NOT completely fill tank. Fill tank to within 1/4 inch (7 mm) to 1/2 inch
(13 mm) of tank top to allow for fuel expansion. Replace filler cap. Wipe
any fuel spillage and oil if leak is detected from engine and Auger
BEFORE operating engine. DO NOT operate engine until leak is fixed
plus, fuel and oil are wiped away. Properly dispose of any fuel or oil
wiped from machine/rags per international and local regulations. DO NOT
allow fuel or oil to get on clothing. Change clothes immediately if this
happens.
DANGER
DO NOT smoke near fuel tank.
DO NOT fill fuel tank with engine running or if it is hot.
Allow ample time between each refueling for engine to
cool.
An ignition source in close proximity to fuel tank can be
the source of an explosion, resulting in property damage
and/or personal injury.
Consult material supplied by engine manufacturer for
information relative to proper fueling procedures.
9 APPLICATION THEORY & TECHNIQUES
The Auger operates on principle of accessory auger bits attached to the
transmission drive shaft to rotate and dig holes in a variety of soil types. The
combination of auger bit diameter, teeth, screw bit, soil type and down pressure
supplied by operators will affect the hole digging rate.
Hole digging process is directly controlled by:
1.
Soil type.
2.
Auger bit boring head design and diameter selected.
3.
When required, sufficient application and/or reduction of machine weight
and/or down force provided by operators to assist auger bit soil
penetration.
4.
No two soil types are exactly alike, no two holes can be dug by exact
same method, overall operator feed rates vary. The hole digging process,
along with operator experience, skill and common sense, suggests hole
digging is a matter of trial and error and directly determines overall
success of the job application.
HOLE DIGGING TECHNIQUES
1.
Normal Auger operation runs engine at full, governed speed allowing
centrifugal clutch to become firmly engaged. Technique transmits more
usable power to auger bit, increasing productivity and reducing
component wear. For any soil condition, allow auger bit to dig at rate
most comfortable to operators, but not cause centrifugal clutch to
overload and slip.
NOTE: Auger is equipped with a centrifugal clutch assembly within the
transmission. The clutch assembly is designed to ALWAYS slip (NOT
DISENGAGE) when overloaded or if auger contacts buried obstruction. When
slipping, clutch still transmits a specific amount of torque to auger. Response
time for clutch to react to overload condition is directly proportional to rotational
speed. With higher rotational speeds (RPM) of clutch at time of overload, it
takes more time for clutch to react and actually slip.
CAUTION
Improper operating procedure can allow auger bit to "bind"
and/or "bury" itself in the hole.
This is usually the result of allowing auger bit to feed at an
excessive rate. Phenomenon is also characteristic of digging
with smaller diameter (2 to 4 inch) augers.
In this condition, Auger is not capable of transmitting ample
power to "free" auger bit.
DO NOT continue to overload and slip centrifugal clutch
assembly.
2.
In general, pressing down on operator handles is not required to initiate
and/or sustain the digging process. In most moderate density soils, auger
bit dig rates will not cause centrifugal clutch to overload and slip. In most
soft, low density soils (sandy, etc.), it may be necessary to hold up on
operator handles to reduce auger bit dig rate due to tendency of any
auger bit design to cause centrifugal clutch to overload and slip. In most
hard, high density soils (hard clay, etc.), it may be necessary to press
down on operator handles to establish and maintain acceptable dig rates.
3.
Some soil conditions may require more power to dig than machine is
capable of delivering for a given auger bit diameter. To minimize problem,
apply suitable down force by operators and use auger bits with new bit
screws and teeth. DO NOT use more than two operators to apply down
force. If it is felt more than two operators are required to apply down
force, STOP and contact Customer Service Department for operational
recommendations.
4.
When digging in areas filled with known, buried obstructions such as tree
roots, rocks and other debris, operate Auger at less than full (an
intermediate) speed for more rapid release of centrifugal clutch when
obstruction is encountered. This is an industry wide operating procedure.
5.
When digging in areas filled with small tree roots, small rocks or other
buried obstructions, allow auger bit teeth to "chip away" at obstruction
until auger bit can pass by (by working object loose) or go through it (as
in penetrating tree roots). Technique usually involves holding up on
operator handles using minimal auger bit feed rate. Many times, size and
nature of buried object will prevent auger bit from passing by or going
through it. Instead, remove buried object with shovel or other suitable tool
and proceed to dig to desired depth using Auger.
CAUTION
Some job applications may encounter buried obstructions too
massive in size or soil classifications too compacted to allow
use of machine the size and/or with operating limitations of
Auger.
Utilization of Auger on these work sites can cause property
damage and/or personal injury.
Exercise proper common sense by selecting proper size
and/or type equipment for the job application.
6.
In most soil conditions, the auger bit will retract with less effort if allowed
to rotate at slow speed. This procedure, however, will leave more loose
soil at bottom of hole. To minimize amount of loose soil remaining at
bottom of hole, stop rotation before retracting auger bit.
7.
When restarting Auger with auger bit in a partially or completely dug hole
extra caution is required. The throttle control can be advanced beyond
idle speed before operators can exercise proper control of Auger. The
accepted procedure (when not using non-flighted auger bit extension) is
to first remove unit from hole and restart engine per STARTING ENGINE
WITH AUGER BIT ATTACHED in OPERATING INSTRUCTIONS section
of this manual. Return unit to hole with engine at idle speed and
complete hole to desired depth.
English-EN
10

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