Blue Diamond 42 Severe Duty Series 2 User manual

Operation and Maintenance Manual
42” Severe Duty Series 2
Mini Excavator Brush Cutter
888-376-7027 | BlueDiamondAttachments.com
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WARRANTY
within 30 days
of purchase

Blue Diamond® Attachments2
Thank you for your decision to purchase a Blue Di-
amond® Standard Duty Tractor Rototiller. To ensure
maximum performance of your equipment, it is manda-
tory that you thoroughly study the Operator’s manual
and follow the recommendations. Proper operation and
maintenance are essential to maximize equipment life
and prevent personal injury.
Operate and maintain this equipment in a safe man-
ner and in accordance with all applicable local, state,
and federal codes, regulations and /or laws. Follow all
on-product labeling and instructions.
Make sure that all personnel have read this Operator’s
Manual and thoroughly understand safe and correct
operating, installation and maintenance procedures.
Blue Diamond is continually working to improve its
products. Blue Diamond reserves the right to make any
improvements or changes as deemed practical and pos-
sible without incurring any responsibility or obligation
to make any changes or additions to equipment sold
previously.
Although great care has been taken to ensure the
accuracy of this publication, Blue Diamond makes no
warranty or guarantee of any kind, written or expressed,
implied or otherwise with regard to the information
contained within this manual. Blue Diamond assumes
no responsibility for any errors that may appear in this
manual and shall not be liable under any circumstances
for incidental, consequential or punitive damages in con-
nection with, or arising from the use of this manual.
Keep this manual available for frequent reference. All
new operators or owners must review the manual before
using the equipment and annually thereafter. Contact
your Blue Diamond Attachments Dealer for assistance,
information, or additional copies of the manual. Contact
www.bluediamondattachments.com or call 888-376-
7027 for a complete list of dealers in your area.
Serial Number Location:
Please record attachment information in the space pro-
vided for future reference.
Figure 1
Model Number:_____________________________
Serial Number: _____________________________
Dealer Name: ______________________________
Dealer Number:_____________________________
Date of Purchase:___________________________
The serial number plate is located as shown in [Figure 1].
Always use your serial number when requesting infor-
mation or when ordering parts.
NOTE: The directions left, right, front and rear, as
mentioned throughout this manual, are as viewed from
the operator’s position.
Introduction: Owner Information
Revision Date: 11.09.2022

3Blue Diamond® Attachments
Table of Contents
1. Introduction......................................................................................4
1.1 Attachment Identification.........................................................4
2. Safety ...........................................................................................5-7
2.1 General Safety Information.................................................... 5
2.2 Qualified Operators................................................................ 5
2.3 Safety Guidelines.................................................................... 6
3. Operation .................................................................................. 8-16
3.1 General Information................................................................. 8
3.2 Attachment Inspection........................................................... 9
3.3 Attachment Installation.........................................................10
3.4 Operating the Attachment ...................................................13
4. Maintenance ...........................................................................17-20
4.1 Service Schedule .................................................................... 17
4.2 Drive Assembly ......................................................................18
4.3 Blade Assembly......................................................................19
4.4 Cleaning the Attachment ....................................................20
5. Troubleshooting...........................................................................21
6. Parts.........................................................................................22-32
6.1 Hydraulic Piston Motor .........................................................22
6.2 Brush Cutter Deck ................................................................ 23
6.3 Decal Identification and Location......................................25
7. Specifications......................................................................... 26-27
7.1 Attachment Specifications....................................................26
7.2 Torque Specifications ........................................................... 27
8. Warranty .......................................................................................29

Blue Diamond® Attachments4
1. Introduction
1.1 Attachment Identification
H M
S P
B
C

5Blue Diamond® Attachments
2.1 General Safety Information 2.2 Qualified Operators
Safe Operation Needs a Qualified
Operator
Operator Training
• Check the rules and regulations at your
location. The rules may include an employer’s
work safety requirements. Regulations may
apply to local driving requirements or use
of a Slow Moving Vehicle (SMV) emblem.
Regulations may identify a hazard such as a
utility line.
• The new operator must start in an area without
bystanders and use all the controls until he or
she can operate the machine safely under all
conditions of the work area.
2. Safety
CAUTION
The signal word CAUTION on the machine and
in the manuals indicates a potentially hazardous
situation which, if not avoided, may result in minor
or moderate injury. It may also be used to alert
against unsafe practices.
WARNING
The signal word WARNING on the machine and
in the manuals indicates a potentially hazardous
situation which, if not avoided, could result in
death or serious injury.
DANGER
The signal word DANGER on the machine and in
the manuals indicates a hazardous situation which,
if not avoided, will result in death or serious injury.
IMPORTANT
The signal word IMPORTANT identifies procedures
which must be followed to avoid damage to the
machine.
SAFETY ALERT SYMBOL
This SAFETY ALERT SYMBOL identifies important
safety messages on the equipment and in the
owner’s manual. when you see this symbol, be
alert to the possibility of personal injury and
carefully read the message that follows.
WARNING
AVOID SERIOUS INJURY OR DEATH
Operators must receive instructions before
operating the machine. Untrained operators can
cause serious injury or death.
For an operator to be qualified, he or she must
not use drugs or alcoholic drinks which impair
alertness or coordination while working. An
operator who is taking prescription drugs must
get medical advice to determine if he or she can
safely operate a machine and the equipment.

Blue Diamond® Attachments6
2.3 Safety Guidelines
Operating Safety
• Read and follow instructions in this manual
and the machine’s Operator’s Manual before
operating.
• Under no circumstances should young children
be allowed to work with this equipment.
• This equipment is dangerous to persons
unfamiliar with its operation.
• Check for overhead and / or underground lines
before operating equipment (if applicable).
• In addition to the design and configuration
of equipment, hazard control and accident
prevention are dependent upon the
awareness, concern, prudence and proper
training of personnel involved in the operation,
transport, maintenance and storage of
equipment.
• Check that the attachment is securely fastened
to the machine.
• Make sure all the machine controls are in the
NEUTRAL before starting the machine.
• Operate the equipment only from the
operator’s position.
• Operate the equipment according to the
Operator’s Manual.
• When learning to operate the equipment, do it
at a slow rate in an area clear of bystanders.
• DO NOT permit personnel to be in the work
area when operating the equipment.
• The equipment must be used ONLY on
approved machines.
• DO NOT modify the equipment in any way.
Unauthorized modification may impair the
function and / or safety and could aect the life
of the equipment.
• DO NOT make any adjustments or repairs on
the equipment while the machine is running.
• Keep shields and guards in place. Replace if
damaged.
• DO NOT operate equipment in poor visibility
conditions such as fog, darkness, or any
conditions that limit clear visibility less than
300 feet (100 m) in front of and to the sides of
the equipment.
• When conditions make it necessary to slow
ground speed, shift to a lower gear rather
than reducing engine speed. The engine will
maintain rated speed and keep cutter running
at optimum cutting speed.
• DO NOT operate in a work area that has
not been inspected for foreign debris and
obstacles.
• Remove any foreign objects and clearly mark
any objects that cannot be removed.
• Wear safety glasses, gloves, hearing protection
and other protective clothing when required.
2. Safety

7Blue Diamond® Attachments
Machine Requirements and Capabilities
• The machine’s operator’s cab should be
equipped with a thermoplastic polycarbonate
or similar material front window, and similar
protection on the sides of the operator’s cab
before operating the equipment.
• Keep bystanders clear of moving parts and the
work area. Keep children away.
• Do Not exceed 3000 psi (206 bar) operating
pressure.
• Use caution on slopes and near banks and
ditches to prevent overturn.
Fire Prevention Safety
• Flamable debris (leaves, grass, etc.) must
be removed regularly. If flammable debris
is allowed to accumulate, it can cause a fire
hazard. Clean often to avoid this accumulation.
• The equipment’s hydraulic motor compartment
must be inspected every day and cleaned
if necessary to prevent fire hazards and
overheating.
• All fuels, most lubricants, and some coolant
mixtures are flammable. Flammable fluids that
are leaking or spilled onto hot surfaces or onto
electrical components can cause a fire.
Transporting Safety
• Comply with state and local laws governing
highway safety and movement of machinery on
public roads.
• Check local laws for all highway lighting and
marking requirements.
• Always yield to oncoming trac and move to
the side of the road so any following trac may
pass.
• Never allow riders on either machine or
equipment.
• If transporting the equipment on a truck or
trailer, make sure the equipment is properly
secured to the transport vehicle.
Hydraulic System
• Check hydraulic tubes, hoses and fittings for
damage and leakage. Never use open flame
or bare skin to check for leaks. Hydraulic tubes
and hoses must be properly routed and have
adequate support and secure clamps. Tighten
or replace any parts that show leakage.
• Always clean fluid spills. Do not use gasoline or
diesel fuel for cleaning parts. Use commercial
nonflammable solvents.
2. Safety

Blue Diamond® Attachments8
3.1 General Information
Pre-Operation Inspection
Before operating the Series 2 Mini-Excavator
Brush Cutter for the first time and each time
thereafter, use the following list as a guideline
during equipment inspection.
• Fully clean the attachment. See “Cleaning The
Attachment” on page 20.
• Lubricate the attachment per the schedule
outline in the Maintenance Section. See
“Service Schedule” on page 17.
• Check the brush cutter mounting plate for
damage. Check for loose or missing parts.
Repair as needed before operation.
• Check that blades are in good condition.
Sharpen or replace them, if necessary.
• Check that all shields and guards are in place.
• Check for loose bolts and tighten them if
necessary.
• Check all welds on the attachment for wear
and damage each time the attachment is
removed from the machine.
• Check for damaged or missing safety decals.
Replace if necessary.
• Inspect the machine’s mounting frame. (See
the machine’s Operator’s Manual for inspecting
the mounting frame). Replace any parts
that are damaged, bent or missing. Keep all
fasteners tight. Look for cracked welds.
• Check condition of all hydraulic components
for leaks. Repair as required.
NOTE: Do not operate with hydraulic leaks.
• Verify that the brush cutter is properly
connected to the machine.
3. Operation
WARNING
AVOID SERIOUS INJURY OR DEATH
• Disengage machine’s auxiliary hydraulics,
engage the machine’s parking brake, stop
the engine and make sure all rotating
components are completely stopped before
connecting, disconnecting, adjusting or
cleaning equipment.
• Always keep shields and all guards in place
when using the equipment.
• Disengage machine’s auxiliary hydraulics for
road travel.
• Keep hands, feet and clothing away from
rotating parts.
WARNING
Leaking fluids under pressure can enter the skin
and cause serious injury or death. Immediate
medical attention is required.
Wear goggles. Use cardboard to check for leaks.

9Blue Diamond® Attachments
3.2 Attachment Inspection
Daily Inspection
NOTE: Inspect the attachment by performing a
walk around daily before and after use. Use the
following inspection checklist as a guideline.
Check the following items every 10 hours of
operation:
• Verify that the brush cutter is properly
connected to the machine.
• Check that all shields and guards are in place.
• Check hydraulic lines, connections and fittings
for hydraulic oil leaks. Repair or replace
damaged parts if necessary.
• Check the brush cutter mounting hardware for
wear or damage. Inspect the pins and mount
(on the attachment) for wear or damage. Repair
or replace damaged parts if necessary.
Weekly Inspection
Check the following items every 40 hours of
operation:
• Check blade bolts for correct torque 1440 ft/
lb.(1952 N•m).
• Check all bolts for tightness.
3/8” bolts to 50 ft/lb (67.5 N•m) torque.
1/2” bolts to 100 ft/lb (135 N•m) torque.
• Inspect the deck for cracks, bends, or damage.
Monthly Inspection
• Inspect the blades for cracks, bends, or
excessive wear.
• Check skid plates for wear.
• Check that all bolts are tight.
• Check blades and mounting plate for cracks or
damage. Replace if necessary.
• Check blade mounting hardware for correct
torque 1440 ft/lb. (1952 N•m). Check mounting
plate hardware.
• Check deck, shields and guards. Repair if
damaged or replace if necessary.
• Check for damaged or missing decals. Replace
if necessary.
• Check for damaged or leaking hydraulic hoses
or fittings. Replace if necessary.
• Clean all debris, leaves, grass and flammable
material from deck area and under covers.
• Lubricate as required.
3. Operation
WARNING
AVOID SERIOUS INJURY OR DEATH
Before servicing the attachment:
• Always park on a flat level surface.
• Lower dipperstick and place attachment flat
on the ground.
• Place all controls in NEUTRAL.
• Engage the park brake.
• Wait for all moving parts to stop.
• Stop the engine and remove the key.
SEE MACHINE’S OPERATOR’S MANUAL FOR
ADDITIONAL INFORMATION.

Blue Diamond® Attachments10
3.3 Attachment Installation
Entering The Operator’s Position
Use the grab handles, tracks, and safety tread (on
the machine) to enter the operator’s position.
When in the operator’s position, fasten the seat
belt.
See the Mini-Excavator operator’s manual to
correctly operate the machine.
Leaving The Operator’s Position
Park the machine / attachment on a flat level
surface.
Place all controls in neutral, engage the park
brake, stop the engine and wait for all moving
parts to stop. Leave the operator’s position.
Use the grab handles, tracks, and safety tread (on
the machine) to exit the operator’s position.
Connecting Attachment To The Machine
Before connecting to the attachment, inspect the
machine’s mounting plate. (See the machine’s
Operator’s Manual for inspecting the mounting
frame).
Enter the operator’s position. See “Entering The
Operator’s Position” on page 10.
3. Operation
IMPORTANT
See the machine’s Operator’s Manual for detailed
information on operating the loader.
WARNING
CRUSH HAZARD
• Before moving the machine, look in all
directions and make sure no bystanders,
especially small children are in the work area.
Do not allow anyone between the machine
and attachment when approaching the
attachment for connecting.
• Keep fingers and hands out of pinch points
when connecting and disconnecting the
attachment.
WARNING
AVOID SERIOUS INJURY OR DEATH
Before leaving the operator’s position:
• Always park on a flat level surface.
• Lower dipperstick and place attachment flat
on the ground.
• Place all controls in NEUTRAL.
• Engage the park brake.
• Wait for all moving parts to stop.
• Stop the engine and remove the key.
SEE MACHINE’S OPERATOR’S MANUAL FOR
ADDITIONAL INFORMATION.

11Blue Diamond® Attachments
Connecting Attachment to the Machine
Cont’d
Bracket Interchange Installation
Order the appropriate bracket interchange from
your local Blue Diamond® Attachments dealer by
supplying the brand and model information of your
machine.
Figure 2
The bracket interchange (Item 1) [Figure 2] is
secured to the attachment with 12 bolts.
Use an appropriate lifting device and slings
to place the bracket interchange onto the
attachment.
Align the holes betwen the bracket interchange
and deck and install the appropriate hardware.
Torque hardware to the specification detailed in
the “Specifications” section of this manual on page
27.
Figure 3
Position the excavator at the rear of the
attachment.
Figure 4
Extend the tool cylinder (Item 1) and paddle until
the pin position (Item 2) [Figure 4] is aligned.
Leave the operator’s position. See “Leaving The
Operator’s Position” on page 10.
Install the pin through the attachment and paddle
and secure with appropriate hardware.
Enter the operator’s position. See “Entering The
Operator’s Position” on page 10.
Adjust the height of the dipperstick (Item 3) to
align with the pin position (Item 4) [Figure 4].
Leave the operator’s position. See “Leaving The
Operator’s Position” on page 10.
Install the pin through the attachment and paddle
and secure with appropriate hardware.
3. Operation
WARNING
AVOID SERIOUS INJURY OR DEATH
The locking pins must extend through the holes
in the attachment mounting frame.
Failure to secure locking pins can allow
attachment to come o.
SEE MACHINE’S OPERATOR’S MANUAL FOR
ADDITIONAL INFORMATION.
1
RIGHT
FRONT LEFT
REAR
1
24
3

Blue Diamond® Attachments12
Connecting Hydraulic Hoses
Remove dirt or debris from the male and female
couplers. Visually inspect the couplers for
corroding, cracking, damage, or excessive wear.
Replace as needed.
Connect the attachment hydraulic hoses to
the machine. Pull on each hose to verify full
connection is made.
Disconnecting Hydraulic Hoses
Relieve auxiliary hydraulic pressure. (See
the machine’s Operator’s Manual for correct
procedure.)
Disconnect attachment hydraulic hoses from the
machine.
Disconnecting Attachment From the
Machine
Relieve auxiliary hydraulic pressure. (See
the machine’s Operator’s Manual for correct
procedure.)
Park the machine and attachment on a flat level
surface. Lower the attachment flat on the ground.
Leave the operator’s position. See “Leaving The
Operator’s Position” on page 10.
Disconnect attachment hydraulic hoses from the
machine.
Remove hardware securing the pins and remove
the pins from the paddle and attachment.
Enter the operator’s position. See “Entering The
Operator’s Position” on page 10.
Raise the dipperstick to clear the attachment.
Drive the machine slowly backward, away from the
attachment.
3. Operation
IMPORTANT
• Throughly clean the quick couplers before
making connections. Dirt can quickly damage
the hydraulic system.
WARNING
AVOID SERIOUS INJURY OR DEATH
Hydraulic fluid, tubes, fittings, and quick couplers
can get hot during operation. Be careful when
connecting and disconnecting hydraulic hoses.

13Blue Diamond® Attachments
3.4 Operating the Attachment
Machine Requirements
Mini Excavator Brush Cutter
• It’s recommended that the machine be
equipped with a thermoplastic polycarbonate
or similar material front window, and similar
protection on the sides of the operator’s cab.
• The machine must be equipped with auxiliary
hydraulics with a hydraulic flow of 16 – 26 GPM
(60 – 98 L/min).
NOTE: Exceeding 26 GPM (98 L/min) flow will over-
speed the drive motor and result in motor failure.
• The machine must have an adequate lift
capacity to safely maneuver the cutter at full
reach on uneven ground.
Operation
• Keep all shields installed. Repair or replace if
damaged or missing.
• Check blade carrier, blades, and mounting
hardware. Replace if damaged. Never weld or
modify.
3. Operation
DANGER
FLYING DEBRIS OR OBJECTS WILL CAUSE
SERIOUS INJURY OR DEATH
To protect the operator from any flying debris
or objects, it is important that the machine’s
operator’s cab should be equipped with a
thermoplastic polycarbonate or similar material
front window, and similar protection on the sides
of the operator’s cab before operating the Mini
Excavator Brush Cutter.
WARNING
THROWN OBJECTS OR ROTATING BLADES CAN
CAUSE SERIOUS INJURY OR DEATH
• Clear work area of all debris, such as rope,
wire, cable, or other materials that can wrap
around blade carrier and blades, causing
entanglement and attachment damage.
• DO NOT operate brush cutter in vicinity of
bystanders, animals, or damageable property.
Objects can be thrown more than several
hundred feet.

Blue Diamond® Attachments14
3.4 Operating the Attachment
Cont’d
Operation Cont’d
Travel Position
Figure 5
Position the dipperstick/arm and attachment as
shown [Figure 5] and keep the attachment 16 – 20
in (40 – 50 cm) above the ground.
NOTE: The ground conditions and the type of
brush being cut will determine the best cutting
procedure and ground speed. The Mini Excavator
Brush Cutter is designed to cut short or tall grass,
brush, and small trees up to 6 in (152 mm) in
diameter.
3. Operation
DANGER
ROTATING BLADES WILL CAUSE SERIOUS
INJURY OR DEATH
• Never put hands, feet or objects into or under
brush cutter when engine is running.
• Keep bystanders away.
• No riders.
• Stop engine before leaving the machine to
service.
WARNING
Never allow riders on the brush cutter.
IMPORTANT
DO NOT operate brush cutter when excessive
vibration is present. Serious damage can result.
Check blade carrier, blades, and mounting
hardware. Replace if damaged.

15Blue Diamond® Attachments
Clearing Work Area Initial Setup
Starting the Cutter
Install the Mini-Excavator Brush Cutter onto the
machine.
Move to the operator’s position, lower seat bar,
start the engine and release the parking brake.
Raise the mini-excavator brush cutter
approximately 6 in. (152 mm) o the ground.
With the mini-excavator engine RPM just above
idle, engage the auxiliary hydraulic flow (see the
mini excavator operator’s manual) to the cutter
head.
Slowly raise the mini-excavator engine RPM to the
correct and desired cutter speed.
Stopping the Cutter
Position the mini-excavator brush cutter
approximately 6 in. (152 mm) o the ground.
Disengage the auxiliary hydraulic flow (see the
mini excavator operator’s manual) to the cutter
head.
3. Operation
DANGER
STAY BACK 200 FEET
IMPORTANT
• DO NOT operate in a work area that has not
been cleared of foreign debris and obstacles.
• Rocks, metal, construction debris, and other
objects can damage the blade carrier and
blades.
• Clearly mark any objects that cannot be
removed.
CAUTION
DO NOT exceed 3000 PSI operating pressure.
Serious damage can result.

Blue Diamond® Attachments16
3.4 Operating the Attachment
Cont’d
Cutting Procedures
Brush Cutting
Because of flow being aected while raising the
cutter, it is best to work from top down. Lift the
cutter to the height needed to begin cutting.
NOTE: Always keep the angle of the blades on a
plane or angle so blades are never visible from the
cab.
Engage hydraulics to begin blade rotation. In
some instances coming straight down is possible
but most applications require swinging and then
dropping slightly to swing again.
Always keep the brush cutter tilted away from the
operator compartment by correcting the angle as
you drop.
Grass Cutting
Set the brush cutter on the ground and then raise
it up a few inches from the ground.
Engage the blades and swing. Be careful to
compensate for rising or falling ground as you may
need to raise or lower your boom to compensate.
Mowing can be accomplished by a swing and
move machine method or swing and adjust boom
method without moving the machine. Some
excavators are capable of mowing while driving,
some hydraulic configurations will not allow for
this.
Tree Cutting
Keep the bottom of the brush cutter pointed away
from the cab, raise the brush cutter to the top of
tree/brush you intend to cut.
Engage blades and begin swinging side to side
while slowly lowering the brush cutter through the
brush.
Once into solid wood such as the base of a tree
(6”) the brush cutter can be slowly lowered without
swinging if desired to shred finer.
NOTE: If not swinging the brush cutter side to side,
avoid positioning the center of the blade carrier
directly over the material being cut.
Position larger material toward the end of the
blades when lowering the brush cutter directly
down on trees or brush.
3. Operation
IMPORTANT
To minimize larger cut material discharging to the
rear, always keep the machine between material
being cut (work area) and buildings, occupied
areas or roadways.
WARNING
Never allow blades to be visible from the operator
position, this means you are in the direct line of
discharge.

17Blue Diamond® Attachments
4. Maintenance
4.1 Service Schedule
DESCRIPTION
SERVICE PROCEDURES
Check Clean Lube Change Adjust Drain
Daily Maintenance (or every 8 hours)
Hydraulic Fittings •
Hydraulic Hoses •
Hydraulic Motor • •
Blades (wear, damage, and loosening) •
Blade Carrier •
All Hardware •
Deck • •
Weekly Maintenance (or every 40 hours)
Blade Bolt Torque - 1440 ft/lb (1952 N•m) •
All Hardware •
Deck (cracks, bends, or damage) •
Monthly Maintenance
Blades (cracks, bends, or excessive wear) •
Skid plates •
All Hardware •
Check Drive Oil •

Blue Diamond® Attachments18
4. Maintenance
1. Type
In normal applications use an extreme pressure
lubricant API-GL-5 approved. AGI recommends SAE
80W, 90 80W-90, and 85W-90 grades of lube under
normal climate and operating conditions. See chart
below. For severe or abnormal applications with special
requirements consult lubricant manufacturer for further
assistance.
2. Change Interval
Initial lubrication change after 50 hours of operation.
Subsequent changes every 1000 hours or yearly
whichever comes first.
3. Lube Temperature
Continuous operating temperatures of 160° F are
allowable. Maximum intermittent temperature
recommended is 200° F.
4. Amount of Lube
The unit should be half full when mounted horizontal.
Lube levels for other mounts will vary.
5. Shaft or Spindle Up Mounting
If mounting unit vertically with shaft or spindle up,
special provisions apply to ensure adequate lubrication
of output bearings.
Low Temperature Gear Lube Requirement
Viscosity Grade Rec. Min Temperature
75W-90 -40°F (-40°C)*
80W, 80W — 90 -15°F (-26°C)*
85W, 85W — 90 10°F (-12°C)*
90 35°F (2°C)*
LUBRICATION DATA
*Maximum temperature for Brookfield Viscosity1of 150,000 centerpoise (cP)2per SAE J306
MAR85
1Brookfield Viscosity - apparent viscosity as determined under ASTM D 2983
2150,000 cP determined to provide sucient low temperature lube properties
Compatible with synthetic lubricants, as long as they meet the above specified parameters.
4.2 Drive Assembly
Lubrication Piston Motor
Figure 7
Oil cleanliness is critical to keeping the equpment
well maintained. Change hydraulic oil and filters at
required intervals to maintain the life of the brush
cutter piston motor (Item 1) [Figure 7]. See the
machine’s Operator’s Manual for correct service
intervals.
IMPORTANT
Fluid such as hydraulic fluid, coolants, grease, etc.
must be disposed of in an environmentally safe
manner. Some regulations require that certain
spills and leaks on the ground must be cleaned
in a specific manner. See local, state and federal
regulations for the correct disposal.
1

19Blue Diamond® Attachments
4.3 Blade Assembly
Blade Tightening / Replacement
Figure 8
Remove the two bolts (Item 1) [Figure 8] and cover
to access blade nut.
Tightening Blade Bolts
Tighten bolts and nuts to 1440 ft/lb. (1952 N•m) of
torque.
Turn blade carrier by hand to align the next blade
nut with the access hole.
Repeat procedure until all blade nuts and bolts
have been tightened.
Reinstall cover.
Blade Removal
Remove the nut and bolt from the blade. Remove
blade.
Turn blade carrier by hand to align the next blade
nut with the access hole.
Repeat procedure until all blade nuts and bolts
have been removed.
NOTE: Blue Diamond® recommends replacing the
bolt and nut every time the blades are changed.
Blade Installation
Align blade with the hole in the blade carrier. Push
the bolt up through the blade into the blade carrier.
NOTE: Verify that blade bolt is fully seated.
Thread nut on blade bolt. Tighten nut to 1440 ft/
lb.(1952 N•m) of torque.
Turn blade carrier to align remaining blade
mounting holes.
Repeat procedure until all blades have been
installed.
Reinstall cover.
4. Maintenance
DANGER
AVOID SERIOUS INJURY OR DEATH
Before servicing the Brush Cutter:
• Lower the dipperstick and place the brush
cutter on flat, level surface.
• Engage parking brake, stop engine, and exit
the machine.
• Disconnect attachment hydraulic hoses.
1

Blue Diamond® Attachments20
4. Maintenance
4.4 Cleaning the Attachment
Park the machine and attachment on a flat level
surface. Lower the attachment flat on the ground.
Leave the operator’s position. See “Leaving The
Operator’s Position” on page 10.
Disconnect attachment hydraulic hoses from the
machine.
Enter the operator’s position. See “Entering The
Operator’s Position” on page 10.
Slowly raise the machine’s dipperstick, while tilting
the brush cutter forward (down) until the front of
the brush cutter contacts the ground.
Stop the engine, engage parking brake and
leave the operator’s position. See “Leaving The
Operator’s Position” on page 10.
Use water or air pressure to clean debris from
under the brush cutter deck.
Be careful when removing any obstructions that
are wrapped around blades and blade carrier.
DANGER
AVOID SERIOUS INJURY OR DEATH
Before servicing the Brush Cutter:
• Lower the dipperstick and tilt brush cutter
fully forward (down) until the front of the brush
cutter contacts the ground.
• Engage parking brake, stop engine, and exit
the machine.
• Disconnect attachment hydraulic hoses.