Danuser G20/40 User manual

Owner:
Date Purchased:
Model #: Serial #:
Manual #:
Owner’s Manual
Danuser Machine Company, Inc.
500 East Third Street
P.O. Box 368
Fulton, Missouri 65251
Tel: [phone] Fax: [phone]
E-mail: [e-mail]
Website: www.danuser.com
Si no entiende ingles, se prefiere que
busque a alguien que interprete las
instrucciones para usted.
DANGER
Made in the U.S.A.
G20/40
G20/40
9MG20402454105

Since 1910
Today, a new modern plant built by my father, Henry Danuser, is
located on the original site. This building and those who work in it are
dedicated to the tradition of fine craftsmanship and to the production
of quality implements. The challenge of changing economic
conditions is being met with improved manufacturing methods. From
this sound growth will come new products, designed to better serve
agriculture and industry.
Jerry Danuser
My grandfather, K.B. Danuser, began building
wagons and repairing all types of machinery in a
small shop in Fulton, Missouri in 1910. With
pride in his Swiss craftsmanship, he established
one policy for his concern which is the hallmark
of Danuser Machine Company, Inc. to this day:
“Good enough won’t do - it must be right.”

3
Foreword
Symbols
Table of
Contents
Please read this manual thoroughly!
Before you assemble, install, or operate your Danuser Digger, read this manual thoroughly.
If there is anything you do not understand, contact your dealer, or call our factory direct at
[phone]. Powered equipment can be dangerous if not assembled, installed, and
operated properly.
Warranty Registration
Your WARRANTY REGISTRATION FORM & INSPECTION REPORT serves two
purposes: it activates warranty coverage; and it allows Danuser to notify you, the owner,
of improvements to the equipment or of new safety features that may be retrofitted to
previously sold diggers. Please return your completed form, so we can provide this service
to you. If you did not complete a WARRANTY REGISTRATION FORM & INSPECTION
REPORT, please call Danuser Machine Company, Inc. at [phone]. Your satisfaction
with our product and your safety as a user of our product are both very important to us.
This SAFETY ALERT symbol identifies important safety messages. Carefully read
each safety message that follows. Failure to understand and obey a safety message,
or recognize a safety hazard, could result in injury or death to you or others around you.
The operator is ultimately responsible for the safety of himself as well as others in the
operating area of the post hole digger.
This is important information for proper use of this
equipment. Failure to comply may lead to premature
equipment failure.
Failure to follow these instructions may cause damage to
the implement or the tractor, or minor personal injury.
Failure to follow these instructions may result in
personal injury or death.
Immediate hazard! Failure to understand and obey this
warning is likely to result in personal injury or death.
NOTE
CAUTION
WARNING
DANGER
Page
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Assembly & Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Installation Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Difficult Digging Suggestions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Decals & Safety Signs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Digger Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Gearbox Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Driveline Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Auger Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
2” Round Augers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Hole Digger Head Auger Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Form No. 3111
Important Safety Message for Owners/Operators . . . . . . . . . . . . . . . . . . . . . .Form No. 3027
Symbol Meaning

4
Safety
Working with unfamiliar equipment can lead to careless injuries. Read and understand this
manual and the manual for your tractor before assembling, installing, operating, or
maintaining this post hole digger. If there is anything in this manual you do not understand,
contact your dealer or Danuser Machine Company, Inc. The safe use of this machine is
strictly up to you, the operator. If this unit is used, loaned, or rented by any other person, it
is the owner's responsibility to make certain that the operator prior to operating:
• Reads and understands the Owner's Manuals
• Is instructed in safe and proper use
The majority of accidents involve entanglement on the driveline or auger. This
entanglement risk becomes greater when you replace the shear bolt or the auger retaining
bolt with a bolt longer than specified by Danuser Machine Company, Inc. This improper
replacement occurs most often on machines that are loaned or rented to someone who has
not read the Owner's Manual and is not familiar with a post hole digger.
• This post hole digger is designed for one-man operation from the tractor seat. It is the
responsibility of the operator to see that no one is within twenty-five feet (25') of the
digger when it is started or in use. Do not operate the digger with another person near
or in contact with any part of the digger, driveline, or auger. Serious personal injury or
death may result if any attempt is made to assist digger operation by hand.
• The use of this equipment is subject to certain hazards which cannot be protected
against by mechanical means or product design. All operators of this equipment must
read and understand this entire manual, paying particular attention to safety messages
and operation instructions, prior to assembling, installing, or operating the digger.
• Please remember it is also important that you read, understand, and follow the safety
signs on the digger. Clean or replace all safety signs if they cannot be clearly read and
understood. They are there for your safety as well as the safety of others. Danuser
Machine Company, Inc. will furnish new safety signs upon request at no charge.
• All things with moving parts are potentially hazardous. There is no substitute for a
cautious, safe-minded operator who recognizes potential hazards and follows reasonable
safety practices. Danuser Machine Company, Inc. has designed this post hole digger to
be used with all its safety equipment properly attached to minimize the chance of
accidents. Study this manual to make sure you have all safety equipment properly
attached.
• If a safety shield or guard is removed for any reason, it must be replaced before the
machine is again operated. Always use, and maintain in place, all shields and guards
furnished with the digger and with the tractor.
• Personal protection equipment including hard hat, safety glasses, safety shoes, and
gloves are recommended during assembly, installation, operation, adjustment,
maintenance, repair, removal, or movement of the digger. During post hole digger
operation, no one is to be within twenty-five feet (25’) of the digger.
• When the use of hand tools is required to perform any part of assembly, installation,
adjustment, maintenance, repair, removal, or movement of the digger, be sure the tools
used are designed and recommended by the tool manufacturer for that specific task.
• Always use two people to handle heavy, unwieldy components during assembly,
installation, adjustment, maintenance, repair, removal, or movement of the digger.
• Never place any part of your body where it would be in danger if movement should
occur during assembly, installation, adjustment, operation, maintenance, repair, removal,
or movement of the digger.
WARNING

5
Safety
(continued)
• Only properly trained people should operate this equipment. Do not allow anyone who
has not read this entire manual and understood the safety rules, safety signs, and
operation instructions to use this digger.
• Never allow children to operate or be around this post hole digger.
• Do not allow riders on the digger or tractor at any time. There is no safe place for any
riders.
• This post hole digger is designed for use only on tractors with 540 RPM power take-off.
Never attach or attempt to operate this digger with any unit exceeding 540 RPM power
take-off.
• Never use alcoholic beverages or drugs which can hinder alertness or coordination
while operating this equipment. Consult your doctor about operating this machine
while taking prescription medications.
• Consult local utility companies to make certain there are no buried gas lines, electrical
cables, etc. in the work area before beginning operation.
• Before beginning operation, clear the work area of objects which might be picked up
and thrown by or entangled in the auger.
• Before you operate the digger, check over all pins, bolts, and connections to be sure all
are securely in place. Replace any damaged or worn parts immediately.
• Do not operate the digger without all safety shields and guards in place.
• Never replace the shear bolt or the auger retaining bolt with anything other than the
specified length bolt in this manual. A longer, or protruding, fastener is more likely to
grab clothing or gloves, which can result in serious injury or death.
• Keep hands, feet, hair, jewelry, and clothing away from all moving and/or rotating parts.
• Never place yourself between the tractor and the digger while the tractor is running.
• To prevent entanglement and possible serious injury or death, never use body weight to
try to push the auger into the ground.
• Worn edges or a slightly rounded point can seriously affect auger penetration. Check
for wear before each use, and replace as necessary.
• Never position the auger point by hand or with any tool when the tractor is running.
• Never position the auger point by putting your hands on the auger, gearbox, boom, or
driveline.
• Do not shovel dirt away from a rotating auger, as the shovel can be caught and thrown
by the auger.
• Do not walk or work under a raised digger unless it is securely blocked or held in
position. Do not depend on the tractor hydraulic system to hold the digger in place.
• A heavy load can cause instability of the tractor. Use extreme care during travel. Slow
down on turns and watch out for bumps. The tractor may need front counterweights to
counterbalance the weight of the digger. It is recommended the tractor be equipped
with a Rollover Protection System (ROPS) and a seat belt be used.
• Use stabilizer bars, adjustable sway chains, or sway blocks on your tractor lift arms to
keep the post hole digger from swinging side-to-side. Adjust as tight as practical for
best performance.
• Do not operate the digger on steep hillsides. When digging on uneven or hilly terrain,
position the tractor with the post hole digger uphill. With the post hole digger downhill,
the tractor could tip when attempting to pull the auger from its hole.

6
Safety
(continued)
• To prevent rapid wear of U-joints and possible failure of drivelines, never lift the auger
point more than twelve inches (12") off the ground when the PTO is operating.
• To prevent possible instantaneous driveline failure, never move the digger from hole to
hole, or transport, while the auger is rotating. This could lead to injury from flying
pieces of the failed driveline.
• Always stop the PTO, set the brake, shut off the tractor engine, and remove the tractor
key before dismounting the tractor. Never leave equipment unattended with the
tractor running.
• Most accidents occur because of neglect or carelessness. Keep all helpers and
bystanders twenty-five feet (25') away from an operating digger.
• Always use care when operating a post hole digger.
Safety is a primary concern in the design, manufacture, sale, and use of post hole diggers.
As the manufacturer of your post hole digger, we want to confirm to you, our customer, our
concern for safety.
Our current production post hole diggers include, as standard equipment, safety signs and
shields or guards for auger adapters, pinions, and drivelines. Older machines can be
retrofitted to add these safety signs and shields or guards. If you have an older Danuser
post hole digger which does not have current standard safety equipment, please contact your
dealer about bringing your machine up to the current level of safety.
Improper operation of this post hole digger can cause serious
personal injury or death. Operation of this post hole digger should
only be done by a competent adult acting in compliance with the
Owner's Manual. Since post hole digging operations are beyond our
control, we disclaim all liability for any damages, injuries or death
which may result.
DANGER

Preparation
Package Inspection
Component Identification
7
Check for shipping damage immediately, and verify that all components have been received.
Report all shipping damage to the carrier immediately.
Before you begin assembly, open all packaging and compare the contents to the photo
(Fig. 1) and shipping list (Table 1) below to ensure you have all of the components and your
unit has all of the safety signs and shields or guards required by current production safety
standards. If your unit does not comply, contact Danuser Machine Company, Inc.
IMMEDIATELY at [phone].
FIG. 1 - DANUSER G20/40 DIGGER COMPONENTS
Ref. Part
No. Description No. Qty.
1 Boom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6045 . . . . . . .1
2 Pin (3/4" x 8") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6056 . . . . . . .1
3 Retaining Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2172 . . . . . . .4
4 Pin (3/4" x 4-15/16") . . . . . . . . . . . . . . . . . . . . . . . . .6055 . . . . . . .1
5 Pinion Guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6057 . . . . . . .1
6 Driveline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6807 . . . . . . .1
7 Yoke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6051 . . . . . . .1
8 Roll Pin (3/16" x 1-1/2") . . . . . . . . . . . . . . . . . . . . . .6061 . . . . . . .1
9Special Shear Bolt (5/16" 18 x 2-1/4" Gr. 5) . . . . . .6015 . . . . . . .3
(one required in unit, two spares included)
10 Nut (5/16" 18) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .573 . . . . . . .3
(one required in unit, two spares included)
11 Auger Adapter Shield . . . . . . . . . . . . . . . . . . . . . . . . .6137 . . . . . . .2
12 Bolt (3/8" 16 x 1-1/4" Gr. 5) . . . . . . . . . . . . . . . . . . .1180 . . . . . . .2
13 Bolt (3/8" 16 x 7/8" Gr. 5) . . . . . . . . . . . . . . . . . . . .2339 . . . . . . .2
14 Nut (3/8" 16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2168 . . . . . . .4
15 Gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
16 Owner’s Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
TABLE 1 - SHIPPING LIST OF DANUSER G20/40 DIGGER (PN 6000)
1
234
3
5
6
7
8
9
10
11
12 13
14 15 16
Owner’s
Manual
Packet

Assembly &
Installation
Description
Recommended Tools
Instructions
Description
The G20/40 Digger is built to the exacting standards of high quality which have become
synonymous with the name Danuser. The G20/40 Digger is designed for one-man operation
from the tractor seat to “Dig Holes Sitting Down.” The heat-treated straight bevel gear set,
tapered roller bearings, and tubular crane boom form an integrated design to provide utility
and reliability. The G20/40 Digger is designed for 20 to 40 horsepower, Category I three-
point hitch, 540 RPM PTO tractors using sway stabilizers. The digger has a 2 inch round
spindle for auger attachment. Augers are available in lengths of 29, 33, and 40 inches, and
auger extensions are available in lengths of 7 and 14 inches. Auger diameters range from
4 to 24 inches. Auger diameter must not exceed 24 inches. Danuser augers are built with
special wear-resistant steel on the lower flights, replaceable cutting edges, and replaceable
points. The auger attaches to the gearbox spindle with a special Grade 8 bolt. The shear
bolt is a special Grade 5 bolt and connects the driveline to the gearbox pinion. Read and
understand this manual and the manual for your tractor before attempting to assemble,
install, or operate this post hole digger. If you have any questions, contact your dealer or
Danuser Machine Company, Inc. at [phone].
Recommended Tools
· Hammer or mallet
· 3/16" roll pin punch
· Emery cloth (for removal of excess paint)
· 1/2", 9/16", 5/8" and 3/4" wrenches
· 5/16" allen wrench (for fill plug)
8
FIG. 2 - G20/40 ASSEMBLY SEQUENCE
= Safety Sign Location
6807

STEP 5: Stand the digger gearbox in an upright position resting on the spindle. Lower the
boom to the gearbox, and attach the gearbox to the boom using pin (PN 6056)
and retaining rings (PN 2172). Avoid pinch points as the gearbox pivots.
STEP 6: Raise the boom to the highest point, and make sure there is no contact between
the boom and the tractor and any point. If necessary, adjust the travel of the
boom to provide maximum travel without boom-tractor contact. Refer to your
tractor operating manual for instructions on three-point hitch adjustments or
refer to Installation Troubleshooting.
Assembly &
Installation
(continued)
9
Personal protection
equipment including hard
hat, safety glasses, safety
shoes, and gloves are
recommended during
assembly, installation,
operation, adjustment,
maintenance, repair,
removal, or movement of
the digger. Do not allow
long hair, loose fitting
clothing, or jewelry to be
around moving parts.
WARNING
Instructions (Refer to Fig. 2.)
STEP 1: Attach the yoke (PN 6051) to the boom (PN 6045) using pin (PN 6055) and
retaining rings (PN 2172). Stabilize components to avoid pinch points during
assembly.
STEP 2: Attach the boom to the tractor upper link bracket with the tractor upper link pin.
Avoid pinch points around the pin during assembly.
STEP 3: Slip the lower link ball joints over the digger yoke link pins, and secure with the
klik pins provided with your tractor hitch. Keep hands away from pinch points
while sliding components together.
STEP 4: Adjust the sway stabilizers as tightly as practical for best performance and to
keep the post hole digger from swaying side-to-side.
Sway stabilizers must be used with the digger.
CAUTION
Because of the weight of some components, and because
some components are difficult to balance, two people are
required for safe assembly and installation of this
equipment.
CAUTION
FIG. 3 - THREE-POINT HITCH REPRESENTATION

56 inches
Assembly &
Installation
(continued)
STEP 7: Remove the fill plug at the top of the gearbox, and fill the gearbox with two
quarts of multigear lubricant EP SAE 140 (or EP SAE 85W/140) before
operating the gearbox. Tip the gearbox 45 degrees (avoid pinch points as
gearbox pivots), and check the level at the plug (see Fig. 4). DO NOT
OVERFILL! Replace the plug before operating the digger.
STEP 8: Grease the inside of the auger adapter liberally, and attach the auger with the
Danuser 1/2" 13 x 3-1/4" (1/2" of thread) special retaining bolt (PN 6014) and
nut (PN 1056). NEVER use a bolt longer than 3-1/4".
STEP 9: Discard the pinion protection cap (PN 6016). Slide the Pinion Guard (PN 6057)
over the gearbox pinion (see Fig. 5). Slide the non-splined end of the driveline
over the gearbox pinion, and secure with the Danuser 5/16" 18 x 2-1/4”
(13/32" of thread) special shear bolt (PN 6015). Drive roll pin (PN 6061)
through the hole in the Pinion Guard and into the end yoke so it rides in the
groove in the pinion.
STEP 10: Slide the two driveline halves apart, and pack 1/4 lb. of good grade gun grease
into the open end of the driveline. Grease the grease zerk in the tractor end yoke
and in the two center crosses. Slide the driveline halves back together with the
end yokes in proper alignment (see Fig. 6). Failure to properly align end yokes
may result in excessive vibration. Always make sure guards are in place and
rotate freely.
STEP 11: Make sure the tractor engine is shut off, then connect the driveline to the tractor
PTO. The drive shaft locks on with a retractable retaining ring coupling device.
Slide the ring back for installation (see Fig. 7).
Driveline shaft engagement should not be less than 10"
when the digger is raised to its maximum height. To
maintain proper engagement, you must not exceed the
56" length shown below.
CAUTION
To avoid personal injury, you must stop tractor engine, set,
brakes, and remove the tractor key before proceeding with
the next step!
WARNING
The roll pin retains the driveline if the shear bolt breaks and falls out.
NOTE
Each time an auger or auger extension is attached to the gearbox, the inside of
the auger adapter should be coated liberally with grease.
NOTE
The gearbox of the G20/40 Digger is shipped dry!
NOTE
FIG. 4 - PIVOT GEARBOX 45
DEGREES TO CHECK
OIL LEVEL
FIG. 5 - PINION GUARD
FIG. 6 - END YOKES
PROPERLY ALIGNED
FIG. 7 - RETRACT RING FOR
INSTALLATION
10
END YOKES

STEP 12: Install the Auger Adapter Shields (PN 6137) around the auger adapter and
secure to the guard bracket (PN 6274) with two bolts (PN 1180) and two nuts
(PN 2168). Install two bolts (PN 2339) and two nuts (PN 2168) in the bottom
two holes of the Auger Adapter Shields. (Refer to Fig. 8.)
Refer to your tractor operating manual for instructions on tractor operation,
tire inflation, and safety when using a three-point hitch mounted implement.
NOTE
When removing the digger from the tractor, disconnect the driveline from the
tractor PTO to prevent damaging the driveline and safety guards.
NOTE
Assembly &
Installation
(continued)
FIG. 8 - AUGER ADAPTER
GUARD INSTALLED
Installation
Troubleshooting 1. Front end of boom
contacts tractor when
boom is raised or
lowered.
(a) Attach the boom to the tractor through a different hole in
the upper link bracket. Upper holes will shorten travel.
Lower holes will increase travel.
(b) Refer to your tractor operating manual for adjustment of
the three-point hitch.
(c) Relocate or adjust the part of the tractor causing the
interference.
2. Digger yoke strikes
boom when digger is
raised.
(a) Attach the front end of the boom to a more forward hole
on the upper link bracket.
(b) Attach the lower links to rear forward pivot points.
(c) Lengthen the lower links.
(d) Refer to your tractor operating manual for adjustment of
the three-point hitch.
3. Tractor has difficulty
raising auger. (a) Attach the lift links to more forward holes in the rockshaft
lift arms to decrease lift range.
(b) Move the lift links to more forward holes in the lower
links to decrease travel.
(c) Check the tractor hydraulic system to be sure it is raising
and lowering to the maximum and minimum heights
recommended in your tractor operating manual.
4. Driveline strikes tractor
power take-off shield
when digger is raised.
(a) Refer to your tractor operating manual for adjustment of
the three-point hitch.
5. Tractor action is
“jerky” with the digger
attached, or the hitch
raises and lowers
rapidly during
transport.
(a) Adjust tractor hydraulic system for “position control”
implement rather than “draft” or “load control.”
(b) If applicable, lock tractor upper link bracket in a fixed
position.
11

12
Operation Read and understand this Owner's Manual carefully before attempting to operate or adjust
the Danuser G20/40 Digger. You are responsible for furnishing this manual to others who
may use the unit. If you have any questions regarding the proper assembly, installation, or
operation of this digger, contact your dealer or Danuser Machine Company, Inc.
STEP 1: Contact local utility companies to make certain there are no buried gas lines,
electrical cables, etc. in the work area. Clear area of objects that could wrap
around the auger or might be thrown. Check for ditches, stumps, holes, or other
obstacles that could cause the tractor to roll.
STEP 2: Layout and mark where you want to dig your holes.
STEP 3: Adjust the auger to a vertical position:
a) Left to right vertical adjustments -
With the PTO disengaged, raise the auger point off the ground. If the
auger pitches left or right, turn the adjusting screw or leveling crank on the
lifting link until the auger appears vertical when looking from the tractor
seat. Refer to your tractor operating manual for further instructions on
three-point hitch adjustments.
b) Front to back vertical adjustments -
Lower the auger slowly until the point just touches the ground. Move the
tractor slowly forward or backward until the auger appears vertical when
looking from the tractor seat.
STEP 4: Set the tractor brakes and take the tractor out of gear to hold the tractor on
location to prevent damage to the digger.
STEP 5: Slowly lower the auger point to the ground. Make sure the auger point is on the
ground before engaging the PTO.
STEP 6: Lower the auger into the ground slowly, then increase the speed as required so
the dirt is augured out from the hole. NEVER exceed 540 RPM. In many types
of soil, it may be necessary to hold back against the auger screw suction by
moving the hydraulic control lever momentarily to either the “HOLD” or
“RAISE” position to keep the auger from screwing into the ground.
When mounted to the three-point hitch, your digger must be able to raise and
lower through the highest and lowest points of your lift arm travel without
binding against the tractor frame. If it does bind, adjust the tractor three-point
linkage so that all movement is free.
NOTE
This post hole digger was designed for one-man operation
from the tractor seat. It is the responsibility of the operator
to see that bystanders and all other people are at least
twenty-five feet (25') from the digger in operation or under
power. Serious personal injury or death may result if any
attempt is made to assist digger operation by hand.
DANGER
Personal protection equipment including hard hat, safety
glasses, safety shoes, and gloves are recommended during
assembly, installation, operation, adjustment, maintenance,
repair, removal, or movement of the digger. Do not allow
long hair, loose fitting clothing, or jewelry to be around
moving parts.
WARNING
Never position the auger
point by hand or with any
tool when the tractor is
running. Never position
the auger point by putting
your hands on the auger,
gearbox, boom, or
driveline.
WARNING
Serious injury or death
can result from misuse
of this equipment.
CAUTION
The G20/40 Digger is
designed for 20 to 40
horsepower, Category I
three-point hitch, 540 RPM
PTO tractors using sway
stabilizers. Auger size
must not exceed 24 inch
diameter. Operation of
this digger in a manner for
which it was not intended
will result in poor
performance and could
create a hazard and the
potential for personal
injury.
WARNING

Operation
(continued)
13
STEP 7: When the auger has been lowered 12 to 18 inches into the ground, raise the auger
almost out of the hole, then dig another 12 to 18 inches and raise the auger again.
Repeat this procedure until the desired hole depth is reached.
STEP 8: When the auger has reached the full depth required, allow the auger to dwell
momentarily at this depth at a slower speed to assist in cleaning out the hole.
STEP 9: Disengage the PTO, and raise the auger from the hole.
STEP 10: To remove loose dirt from auger, spin the auger by momentarily engaging the
PTO with the engine running at a faster speed than used for digging.
STEP 11: If you break a shear bolt, the roll pin should retain the driveline on the G20/40
Digger pinion. Replace the special shear bolt as follows:
(a) Disengage the PTO, set the brakes, shut off the tractor engine, and remove
the tractor key.
(b) Remove the broken shear bolt.
(c) Install a new Danuser shear bolt (PN 6015) and nut (PN 573). This is a
special thread length bolt - use genuine Danuser replacement parts only.
NEVER use a bolt longer than 2-1/4".
(d) Tighten the shear bolt nut securely.
To prevent injury, keep an area of at least twenty-five feet
(25') around the auger clear of bystanders and all other
people.
DANGER
Do not shovel dirt away from a rotating auger, as the shovel
can be caught and thrown by the auger.
DANGER
For “heavy” soil conditions or for tractors requiring driveline rotation to
produce lifting power, allow the auger to turn at a slow speed while raising
it to the top of the hole.
NOTE
This digger is designed to operate at a maximum PTO speed
of 540 RPM. NEVER exceed 540 RPM.
WARNING
NEVER use body weight to help the auger penetrate the
ground. When the ground is too tough to penetrate with
your cutting edges and point, replace them and try again.
These are replaceable parts and must be in good condition
to penetrate. If you have difficulty penetrating hard ground,
refer to Difficult Digging Suggestions.
DANGER
Replace a broken or
damaged shear bolt or
auger retaining bolt ONLY
with an authorized factory
replacement. A shear bolt
or auger retaining bolt that
is too long increases the
possibility of personal
injury. The shear bolt and
auger retaining bolt must
be of the proper size and
grade to function properly.
All persons should be at
least twenty-five feet (25')
away. Clear the area of
bystanders, especially
children. Do not allow
anyone to stand behind,
or to the side of, a
rotating auger.
DANGER
WARNING

STEP 12: If the auger becomes lodged on an obstruction below ground, do not attempt to
raise the auger by hydraulic lift power alone. Disengage the PTO, set the brakes,
shut off the tractor engine, remove the tractor key, and dig around the auger
enough to free it from the obstruction before trying to remove the auger from the
hole. Apply lift power and slowly rotate the driveline to raise the auger to the
top of the hole.
STEP 13: Disengage the PTO when traveling between holes.
Worn edges or a slightly rounded point can seriously affect auger penetration.
Check for wear before each use, and replace as necessary. Additional options:
a. Different Auger Points shown on page 22.
b. Different Cutting Edges shown on page 22.
c. Down Force Kit shown on page 23.
d. Hole Digger Head Augers shown on page 21.
e. Weld-on Hole Digger Head shown on page 21.
To avoid damage to the driveline, and to reduce the risk of
personal injury, never transport the digger with the tractor
PTO engaged.
CAUTION
Before digging around the auger, disengage the PTO, set the
tractor brakes, shut off the tractor engine, and remove the
tractor key.
DANGER
Keep others at least twenty-five feet (25') from the auger
when applying lift power to raise the freed auger from the
ground. Stop auger rotation prior to lifting out of hole.
DANGER
Operation
(continued)
WHATTODO WHEN
Check digger for loose bolts or fasteners. Daily
Check auger for loose, worn, or broken cutting edges
or point. Daily
Check gearbox oil level, fill as necessary with
multigear lubricant EP SAE 140*. (Refer to Fig. 9.) Periodically
Drain gearbox housing, flush, and refill with two
quarts multigear lubricant EP SAE 140*. After 500 hours use
Coat auger with grease to prevent rusting. After paint has been
removed through usage
Lubricate universal driveline fittings with good
quality gun grease. After 300 holes
Coat the inside of the auger adapter liberally with
grease. Each time an auger or extension is attached to the gearbox
Maintenance
FIG. 9 - PIVOT GEARBOX 45
DEGREES TO CHECK OIL
LEVEL
14
Difficult Digging
Suggestions
* may also use EP SAE 85W/140

15
Decals &
Safety Signs
PART NO. PHDC 1
Location: Boom, rear, above gearbox
PART NO. PHDC 2
Location: Boom, left side
PART NO. PHDC 3
Location: Boom, right side
PART NO. PHDC 4
Location: Boom rib, right side
PART NO. PHDC 5
Location: Auger, under Auger Adapter Guard
PART NO. 2088
Locations: Boom, right side; gearbox
PART NO. 2169
Locations:
Auger Adapter Shield, rear half;
Auger Adapter Shield, front half
PART NO. 9875
Location: Gearbox, lid
SERIAL NUMBER
Location: Gearbox, lid
PART NO. 13-10021
Location: Driveline Guard
WARNING
Clean or replace all safety
signs if they cannot be
clearly read and understood.

16
Digger Parts
Ref. Part No
No. Description No. Req’d
Driveline & Hardware Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6079 . . . . . .1
(consists of the following)
1 Driveline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6807 . . . . . .1
2 Roll Pin (3/16" x 1-1/2") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6061 . . . . . .1
3 Shear Bolt (5/16" 18 x 2-1/4" Gr. 5, 13/32" of thread) . . . . . . .6015* . . . . .3
(SPECIAL BOLT: Use Genuine Danuser Replacement Only)
4 Nut (5/16" 18) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .573* . . . . .3
5 Pin (3/4" x 4-15/16") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6055 . . . . . .1
6 Retaining Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2172 . . . . . .4
7 Pin (3/4" x 8") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6056 . . . . . .1
8 Pinion Guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6057 . . . . . .1
9 Boom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6045 . . . . . .1
10 Yoke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6051 . . . . . .1
Gearbox Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6042 . . . . . .1
(consists of the following)
11 Bolt (3/8" 16 x 1-1/4" Gr. 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . .1180 . . . . . .2
12 Bolt (3/8" 16 x 7/8" Gr. 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2339 . . . . . .2
13 Nut (3/8" 16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2168 . . . . . .4
14 Auger Adapter Shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6137 . . . . . .2
Owner’s Manual (in digger box) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
* One required in unit. Two extra are included in package for replacement.
DANUSER G20/40 DIGGER
= Safety Sign Location

Gearbox
Assembly
Ref. Part. No.
No. Description No. Req’d
1 Bolt (7/16"14 x 1-3/4"Gr. 5) . . .6059 . . . . . .6
2 Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . .1
3 Cone (Upper Spindle) . . . . . . . . . .6009 . . . . . .1
4 Cup (Upper Spindle) . . . . . . . . . . .6008 . . . . . .1
5 Housing Cover Plug . . . . . . . . . . . .1113 . . . . . .1
6 Gear Housing Cover . . . . . . . . . . .6004 . . . . . .1
7 Cap . . . . . . . . . . . . . . . . . . . . . . . . .6005 . . . . . .1
8 Cap (Pinion Protection) . . . . . . . . .6016 . . . . . .1
9 Bolt (7/16"14 x 1-3/4"Gr. 5) . . .6059 . . . . . .3
10 Oil Seal (Pinion) . . . . . . . . . . . . . .6017 . . . . . .1
11 Cup (Outer Pinion) . . . . . . . . . . . . .6012 . . . . . .1
12 Cone (Outer Pinion) . . . . . . . . . . . .6013 . . . . . .1
13 Pinion . . . . . . . . . . . . . . . . . . . . . . .6349 . . . . . .1
14 Cup (Inner Pinion) . . . . . . . . . . . . .6010 . . . . . .1
15 Cone (Inner Pinion) . . . . . . . . . . . .6011 . . . . . .1
16 Gear Housing . . . . . . . . . . . . . . . . .6003 . . . . . .1
17 Cup (Lower Spindle) . . . . . . . . . . .6006 . . . . . .1
18 Cone (Lower Spindle) . . . . . . . . . .6007 . . . . . .1
19 Oil Seal (Spindle) . . . . . . . . . . . . . .6018 . . . . . .1
20 Guard Bracket . . . . . . . . . . . . . . . .6274 . . . . . .1
21 Spindle Assembly . . . . . . . . . . . . . .6352 . . . . . .1
22 Danuser Decal . . . . . . . . . . . . . . . .2088 . . . . . .1
23 Auger Adapter Shield . . . . . . . . . . .6137 . . . . . .2
24 Bolt (3/8"16 x 7/8"Gr. 5) . . . . . .2339 . . . . . .2
25 Bolt (3/8"16 x 1-1/4"Gr. 5) . . . .1180 . . . . . .2
26 Nut (3/8"16) . . . . . . . . . . . . . . . . .2168 . . . . . .4
27 Safety Sign . . . . . . . . . . . . . . . . . . .2169 . . . . . .2 17
= Safety Sign Location

18
Driveline
Parts
Ref. Part. No.
No. Description No. Req’d
1 Driveline . . . . . . . . . . . . . . . . . . . . . . .6814 . . . . .1
Telescoping Assembly with Guard
2 Digger Half with Guard . . . . . . . . . . .6815 . . . . .1
3 End Yoke . . . . . . . . . . . . . . . . . . . . . . .6809 . . . . .1
4 Center Cross Repair Kit . . . . . . . . . . .6817 . . . . .2
5 Yoke and Tube . . . . . . . . . . . . . . . . . . .6811 . . . . .1
6 Bearing Retainer . . . . . . . . . . . . . . . . .6067 . . . . .2
7 Nylon Bearing . . . . . . . . . . . . . . . . . . .7258 . . . . .2
8 Inner Guard (incl. Centralizer) . . . . . .6810 . . . . .1
9 Tractor Half with Guard . . . . . . . . . . .6816 . . . . .1
10 Outer Guard . . . . . . . . . . . . . . . . . . . . .6813 . . . . .1
11 Yoke and Shaft . . . . . . . . . . . . . . . . . .6812 . . . . .1
12 Spring-Lok Yoke Assembly . . . . . . . .7269 . . . . .1
13 Spring-Lok Repair Kit . . . . . . . . . . . .6131 . . . . .1
G20/40 DRIVELINE PARTS
= Safety Sign Location
CAUTION
Failure to properly
align end yokes may
result in excessive
vibration. Always be
sure guards are in
place and rotate freely.
Part No. 13-10022
Location: Driveline
tube, under guard
PART NO. 13-10021
Location: Driveline Guard
End Yokes Properly Aligned
8
7
6
5
4
3
12
4
11
6
7
10
13
2
1
9

19
Auger
Assemblies
Ref.
No. Part Number by Auger Diameter Description No.
Req’d
4" 6" 9" 12" 14" 16" 18" 24"
1See next page for available augers. Auger 1
27782 7783 Plain Cutting Edges (Weld On) 1 Set
7784 7790 7792 7794 7796 7798 Plain Cutting Edges (with Bolts & Nuts) 1 Set
3 7785 7791 7793 7795 7797 7799 Serrated Cutting Edges (with Bolts & Nuts) 1 Set
4 899 831 831 831 831 831 831 831 Standard Auger Point 1
5 6019 6019 6019 6019 6019 6019 6019 6019 Auger Adapter Replacement (for Field Welding) 1
6 784 784 784 784 784 784 Cutting Edge Bolt (3/8" 16 x 1" Carriage) As Req’d
7 785 785 785 785 785 785 Cutting Edge Nut (3/8" 16 Hex) As Req’d
8 6014 6014 6014 6014 6014 6014 6014 6014 Retaining Bolt (1/2" 13 x 3-1/4" Gr. 8, 1/2" of thread)
SPECIAL BOLT: Use Genuine Danuser Replacement Only 1
9 1056 1056 1056 1056 1056 1056 1056 1056 Retaining Nut (1/2" 13 Hex) 1
10 6080G 6080G 6080G 6080G 6080G 6080G 6080G 6080G Auger Extension with Guard (7") 1
6204G 6204G 6204G 6204G 6204G 6204G 6204G 6204G Auger Extension with Guard (14") 1
11 6239 6239 6239 6239 6239 6239 6239 6239 Coiled Pin (1/2" x 2-3/4")
SPECIAL PIN: Use Genuine Danuser Replacement Only 1
12 1937 1937 1937 1937 1937 1937 1937 Special Duty Auger Point 1
13 6210 6210 6210 6210 6210 6210 6210 Aggressive Duty Auger Point 1
Augers have replaceable points and edges. Serrated cutting edges (Ref. No. 3) and optional points (Ref. No. 12 and
Ref. No. 13) are available to aid penetration in tough digging conditions. Flights are replaceable except on 4" and 6",
where the flight is a continuous spiral. Cutting edges on 4" and 6" augers are welded on the auger.
NOTE
When using an extension, Ref. No. 8 (PN 6014) and Ref. No. 9
(PN 1056) should be relocated from the auger adapter to the
extension adapter, and Ref. No. 11 (PN 6239) should be used to
attach the auger to the extension to avoid possible entanglement.
DANGER
AUGER ASSEMBLIES FOR 2" ROUND SPINDLES
= Safety Sign Location

2” Round Augers
Part Number by Auger Diameter Description
18" x 10" 24" x 12" 30" x 16"
6240 33" Long with Plain Edges & Standard Point
Auger Uses Both Dimensions of Cutting Edges - See Page 19
6248 33" Long with Serrated Edges & Standard Point
Auger Uses Both Dimensions of Cutting Edges - See Page 19
6241 6242 40" Long with Plain Edges & Standard Point
Auger Uses Both Dimensions of Cutting Edges - See Page 19
6249 6250 40" Long with Serrated Edges & Standard Point
Auger Uses Both Dimensions of Cutting Edges - See Page 19
Part Number by Auger Diameter Description
18" 24"
6256 6255 29" Long with Serrated Edges & Standard Point
2" ROUND SPINDLE ORCHARD AUGERS
2" ROUND SPINDLE STEPPED AUGERS
= Safety Sign Location
20
Part Number by Auger Diameter Description
4" 6" 9" 12" 14" 16" 18" 24"
6101 6029 6030 6032 6034 6036 6038 6040 40" Long with Plain Edges & Standard Point
6031 6033 6035 6037 6039 6041 40" Long with Serrated Edges & Standard Point
2" ROUND SPINDLE AUGERS