Brush Wolf 72 M-AX Instructions for use

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72 M-AX
Owner / Operator
Instruction & Maintenance
Manual

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Before operation of your Brush Wolf 72 M-AX read the
entire contents of this manual
Congratulations on your purchase of the Brush Wolf 72 M-AX Extreme Duty Rotary
Brush Cutter. At Cross-Tech Manufacturing we take great pride in the design and
manufacturing of our products and want you to know we appreciate your busi-
ness. We are confident your Brush Wolf will provide many years of reliable service.
Welcome to the Brush Wolf family.
The 72 M-AX Extreme Duty Rotary Brush Cutter is engineered to cut brush and can
cut trees up to 8 inches in diameter dependant upon the type of wood and the
density of the vegetation.
For your safety and the safety of others, please read the entire contents of this man-
ual prior to the operation of the Brush Wolf 72 M-AX.
If you have questions regarding your Brush Wolf, contact your dealer.
Please take the time to fill out the Warranty Registration Form contained in this
manual or go on-line at Brushwolf.com. A Warranty Registration Form must be
on file within thirty days of the purchase date in order for warranty claims to be
valid. A full description of the warranty and process for submittal can be found on
page 19.
To ensure prompt and accurate information when working with your dealer re-
garding your Brush Wolf 72 M-AX please complete the Owner Reference Informa-
tion below. The information will be vital for service, repair and warranty inquiries.
OWNER REFERENCE INFORMATION
Date Purchased:
Dealer Name:
Dealer Phone:
Model Number:
Serial Number:
Thank you for your business!

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Table of Contents
Foreword...........................................................................................2
Safety Section...................................................................................6
Operation Instructions..................................................................8
Maintenance.....................................................................................9
Maintenance Checklist.................................................................10
Troubleshooting.............................................................................11
Parts Diagram..................................................................................12
Parts List.............................................................................................13
Parts List and Diagram
- Drop Blade Carrier - 3 blade assembly......................14
Drop Blade Replacement Instructions.....................................15
Parts List and Diagram
- Flat Blade Carrier - 4 flat blade assembly..................16
Flat Blade Replacement Instructions........................................17
Dealer Checklist..............................................................................18
Warranty Registration...................................................................19
Warranty Information...................................................................20

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The following safety instructions are provided to alert you to precautions which, if not
followed, may cause serious injury to yourself or others. Please read these instructions com-
pletely. Cross-Tech Manufacturing can not cover every incident that might be a hazard.
Extreme caution should be used at all times. Only use Brush Wolf Brush Cutters for the
purpose for which they have been designed. Always operate skid steer with a forestry rated
door and cab. Safety goggles and hearing protection must be worn at all times.
Site Inspection: Before operation of the Brush Wolf 72 M-AX, carefully inspect the area to
be cleared. Remove any items which may be picked up and thrown by the cutting blades;
wire, pipes, or rocks. Mark any object too large to move.
Equipment Inspection: Prior to inspection the unit must be disconnected from the skid
steer. To inspect or to make repairs under the 72 M-AX deck always block the unit securely
in order to prevent accidental release of the lift mechanism. Inspect all hydraulic hoses and
shields to ensure they are in good condition and without holes before pressurizing. Hydrau-
lic fluid can escape under pressure and may cause serious injury or death. Wear safety gog-
gles, ear protection, hard hat, and only operate the skid steer behind shatter proof forestry
rated door and cab.
Skid Steer Auxiliary Hydraulic Flow: The 72 M-AX Extreme Duty is only to be used on
a skid steer with auxiliary hydraulic flow rated at 30 - 40 GPM (Gallons Per Minute). Any less
GPM and the 72 M-AX will not operate at peak proficiency.
Do Not operate near bystanders, vehicles, pets, livestock or buildings. Objects may dis-
charge while cutting with the 72 M-AX and has the potential to cause injury,
Do Not place hands, feet or other objects under the deck while the Brush Wolf 72 M-AX
is in operation. To inspect or perform maintenance under the deck, always shut down the
power to the Brush Wolf, shut-off the skid steer engine, and disconnect hydraulic hoses.
Do Not raise the mower deck when blades are rotating. Operation with the mower raised
will expose the cutting blades and the potential for injury or death.
Do Not allow children to operate a rotary brush cutter. Only individuals with skid steer
experience who are well acquainted with the rules of safe operation should be allowed to
operate the Brush Wolf 72 M-AX.
Safety Instructions

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Safety Instructions
Do Not operate the Brush Wolf 72 M-AX in conditions with poor visibility.
Do Not expose the underside of the blades towards the cab.
Do Not operate while intoxicated or if taking medications that may impair your senses or reac-
tions.
Do Not attempt to straighten blades. Order replacement blades if blades are bent, cracked or
damaged.
Do Not leave the Brush Wolf 72 M-AX unattended while in a raised position. Always make sure
both the runners are placed firmly on the ground.
Do Not continue operation if an unexpected object is struck. IMMEDIATELY shut down power to
both the attachment and the skid steer. Disconnect from the hydraulic couplers from the power
source. Evaluate the damage, repair and the test unit before operation.
Do Not allow anyone or any item on top of the mower deck when in operation.

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Operation Instructions
1. Prior to operation check blades and replace if cracked or damaged. All blades must be re-
placed at the same time. Tighten the blade carrier to the bearing housing, blade bolts/nuts,
and hydraulic motor mount nuts. Check the hydraulic fluid. A low level could indicate a
leak and require a closer inspection of your unit.
2. Connect the Brush Wolf 72 M-AX to your skid steer with the universal quick-tach mount.
3. Once connected, visually check the lock pins to make sure the 72 M-AX is securely locked in
place. Do Not operate the Brush Wolf 72 M-AX on Low Flow auxiliary hydraulic or any skid
steer rated under 30 GPM. All 72 M-AX units are designed to operate on skid steers rated
with auxiliary hydraulic flow of 30 - 40 GPM.
4. Inspect the hydraulic couplers and wipe off water, dust or any debris. Dirt and debris can
damage hydraulic components. Once cleaned, connect the couplers from the cutter to the
auxiliary hydraulic system on the skid steer.
5. Connect the auxiliary hydraulic lines for the brush cutter to the skid steer. Twist the collars
of the quick connect couplers to secure the hydraulic connections.
6. Confirm all safety measures have been completed per the Safety Instructions. Most impor-
tantly make sure the area is clear of personnel.
7. Enter shatter-proof cab door, engage seat belt, release brake and start engine. The runners
of the 72 M-AX should be as close to the ground as possible. Never raise the 72 M-AX more
than seven (7) inches off the ground.
8. Slowly apply hydraulics to the Brush Wolf 72 M-AX and increase the engine speed to high
idle. Make sure the unit is operating smoothly before moving the skid steer forward.
9. Maintain a speed to handle the volume of brush and to prevent stalling.
10. Stay alert for drop-offs, rocks, holes, abandoned wells and septic tanks. Do not operate or
drive across a steep embankment.
11. To cut large diameter brush and trees, move forward slowly to make the cut.
12. When finished cutting, lower lift arms, make sure the cutter is placed flat on the ground,
throttle down the skid steer and shut off the hydraulic flow to the unit, stop engine, and
engage parking brake prior to leaving the cab. Noise at shut down is normal.
13. To disconnect hoses use proper hand protection as the couplers may be hot.

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Maintenance
Your new Brush Wolf 72 M-AX Exteme Duty is a precisely engineered attachment and re-
quires little maintenance. The Brush Wolf 72 M-AX is built to strict standards and will deliver
years of dependable service by following these maintenance guidelines:
1. Perform maintenance on level surface with the unit firmly on the ground. Shut off
the hydraulic power supply and disconnect hydraulic couplers.
2. Check all nuts and bolts for proper tightness. See Maintenance Schedule.
3. Every Brush Wolf is tested at the factory and all nuts and bolts have been tight-
ened to specifications. We recommend you check them after the first 4 to 6 hours
of operation and at regular intervals as defined in the Maintenance Schedule.
4. Inspect blades and the pins to the blade bolts before each use. Tighten all the
nuts which secure the blades to the blade carrier every eight (8 )hours. Torque to
540 ft - lbs with a 1-11/16” socket on the Drop (3) Blade Carrier. Torque to 270
ft - lbs with a 1-1/8” on the Flat (4) Blade Carrier. The nuts are located under
the access plate on the top of the cutter (see Parts Diagram on Page 12 item # 2).
5. Tighten the nuts on the blade carrier at the lower end of the bearing housing.
Torque to 380 ft - lbs with a 15/16” socket wrench.
6. Check lubricant level weekly. Remove the bearing housing plugs. If the resevoir
is full it will measure within 2” of the plug cap. Loss of fluid could be indicative of
a leak. When adding oil use 80 W 90 gear lube weight - DO NOT over fill - too
much lubricant will rupture the bearing housing. The bearing housing is full
when the oil level is 2” from the plug cap.
CAUTION: Always replace the entire set of blades. Never weld or straighten
damaged blades, as loss of blade integrity may result.
CAUTION: Replace missing or illegible safety decals immediately. Decals are
available at your Brush Wolf 72 M-AX dealer.

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Maintenance Schedule / Check List
ITEM TYPE OF MAINTENANCE FREQUENCY
Blade carrier to bearing
housing bolts
Torque to 380 ft - lbs for the 3 & 4 blade carri-
er assemblies.
Daily or every 8 hours
Blade Bolt/nuts Torque to 540 ft - lbs for the 3 drop blades.
Torque to 270 ft - lbs for the 4 flat blades.
Daily or every 8 hours
Blade Inspection Check for damage, dullness or cracks. Blades
should rotate freely and be clear of obstruc-
tions. Replace entire set of blades if damaged.
Daily or every use
Bearing Housing Remove any foreign material from shaft. Daily or every use
Hoses and hose safety shield Check for wear or damage. Daily or every 8 hours
Hydraulic Motor Mount
Bolts
Torque to 75 ft - lbs. Daily or every 8 hours
Bearing housing lubricant Check oil - add 80 W 90 gear oil - DO NOT
over fill - The bearing housing is full when oil
level is 2” below the plug cap.
Once per week
Push Guard Clean the fitting before lubrication. Apply
grease to the pins on the guard of the 72
M-AX.
As needed
72 M-AX Unit Clean the unit to view potential damage or
obstructions that could result in poor perfor-
mance.
As needed
CAUTION: Perform maintenance on a level surface with the unit
firmly on the ground. Shut off the hydraulic power sup-
ply and disconnect hydraulic couplers.
Do Not loan your 72 M-AX to another skid steer owner.
The potential exists for hydraulic contamination
and could shorten the life of your skid steer or the
hydraulic motor on your 72 M-AX.

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Troubleshooting
Problem Check
Loss of Power Low hydraulic fluid level
Overheated hydraulic fluid*
Contaminated hydraulic fluid*
*May damage hydraulic motor
Excessive Dull, broken or damaged blades
Unit Vibration Blade carrier out of balance
Loose nuts and bolts
New blade or bolts matched with worn blade or bolts
Wire or rope wrapped around blades
Leaking Oil Loose hydraulic connections
Ruptured hydraulic motor seals
Note: When performing maintenance, shut down the skid steer and remove
hoses from the power source.

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72 M-AX Parts Diagram

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ITEM ITEM QTY PART NUMBER DESCRIPTION
1 1 15204 FRAME, 72 M-AX, WELDMENT
2 1 15206 PLATE, ACCESS, 3 HOLE, M-AX
3 1 15235 WELDMENT, PUSH GUARD, M-AX
4 1 15141 DECAL KIT, BW 72 M-AX
5 2 15587 HOSE WHIP ASSEMBLY, -12 ORFS, FEMALE SWIVEL COUPLINGS, 0.750 X 114.000 HOSE
6 1 15588 HOSE WHIP ASSEMBLY, -6 ORFS, FEMALE SWIVEL COUPLINGS, 0.375 X 120.000 HOSE
7 1 15087 MOTOR, 11.9 CU IN, SAE “CC” 4 BOLT, 0.750 DIA SPLIT FLANGE STAGGERED PORTS, 14
TOOTH SPLINE
8 1 15078 COUPLER, FLAT FACED, FEMALE, 3/4
9 1 15079 COUPLER , FLAT FACED, MALE, 3/4
10 1 15118 BEARING HOUSING, #8
11 1 15119 SPRING, TORSION, PUSH GUARD, RIGHT
12 1 15120 SPRING, TORSION, PUSH GUARD, LEFT
13 1 15124 BLOCK, CROSSOVER RELIEF MANIFOLD, 6K MOTOR, STEEL
14 2 15221 PIN, SPRING, 1.250 DIA X 6.500
15 1 15401 CLAMP, BODY, TWO PIECE, 30-30-18, THREE HOSE, BLACK
16 2 15405 ADAPTER, STRAIGHT, #12 ORF, #12 STOR
17 2 15406 ADAPTER, STRAIGHT, #12 ORF, #10 STOR
18 1 15407 ADAPTER, STRAIGHT, #6 ORFS, #4 ORB
19 1 15408 ADAPTER, STRAIGHT, #6 ORF, #8 STOR
20 1 15414 COUPLER, FLAT FACED, FEMALE, 3/4-16, O-RING BOSS
21 1 15418 PLATE, STAUFF, 3 HOLE COVER, 1.25 X 5.875
22 2 15351 EDGE TRIM, 0.375 X 0.625 x 11.250 LEG, DUAL TNG
23 4 Hardware BOLT, HH, 1/2-13 X 2 UNC, GRD 5, ZINC
24 2 Hardware BOLT, HH, 3/8-16 X 3, GRD 5, ZINC
25 4 Hardware BOLT_HH_ DH_1_4-20X1 UNC_GRD5
26 3 Hardware NUT, NYLOCK, 3/8-16, ZINC
27 8 Hardware NUT TOPLOCK 5/8-11 GRD8 ZINC
28 8 Hardware SCREW_ CAP_SH_ 3_8-16X3 1_2 GRD8
29 4 Hardware WASHER_FLAT_.250 X .500 O.D.
30 3 Hardware WASHER, FLAT, 3/8, ZINC
31 8 Hardware WASHER, FLAT, 5/8, F436, ZINC
32 4 Hardware WASHER_SPRING LOCK_.250
33 4 Hardware WASHER, SPRING LOCK, .500, ZINC
34 2 Hardware WIRE, SS, .032 X 3
35 2 15247 ZERK, GREASE, 1/4”-28 STRAIGHT, 0.688 LONG
Parts List Model 72 M-AX

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DROP BLADE CARRIER ASSEMBLY
ITEM ITEM QTY PART NUMBER DESCRIPTION
1 1 15095 WELDMENT, BLADE CARRIER, 47.000 DIA X 1.000
PLATE, M-AX
2 3 15094 BLADE, 18.000 X 5.000 X 0.625
3 3 15101 BOLT, D-BOLT, 1 1/8-12, M-AX
4 3 15148 NUT, TOP LOCK, 1 1/8-12, GRADE C, PLAIN
5 8 Hardware BOLT_HH_ 3_4-10X2 UNC_GRD8
6 3 Hardware WASHER, FLAT, 1 1/8, F436, ZINC
Standard Blade Assembly
Drop Blade Assembly - 3 blades
Parts List

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Standard Blade Assembly
Drop Blade Maintenance - 3 blades
1. Perform maintenance on level surface with the 72 M-AX blocked off the ground. Shut off the hy-
draulic power supply and disconnect hydraulic couplers.
2. Tighten bolts of blades every use or every eight hours. Inspect blades.
3. Damaged, bent or dull blades should be replaced immediately. Replace all three blades, and
hardware at the same time. Follow the instructions below.
To Replace Blades:
1. Remove Nylock nuts and washers from plate on the cutter deck to expose access hole. Reference
item #2 on the Parts drawing of 72 M-AX on page 12.
2. Through the exposed access hole rotate the blade carrier to line up the nut of the blade for ac-
cess.
3. Insert a 1-11/16”socket through the access hole and remove the nut for each blade.
4. Remove blades from brush cutter.
5. Clean new bolts, lock-nuts and washer with cleaner/degreaser. Prior to assembly, ensure all
hardware is dry and free of any contaminents including the carrier assembly.
6. Use Primer Loctite on the bolts and nuts according to directions on the label.
7. Apply Loctite #243 to the first 10 bolt threads to ensure coverage.
8. Assemble the new blade, the bolt, washers, and the nut to the carrier. The blade carrier cuts in
one direction - counter clockwise.
9. Torque the blade bolts to 540 ft/lbs using a 1-11/16” socket.
10. Confirm the blade carrier rotates freely and is clear of any obstructions.
11. Install the plate to the access hole on the top of the 72 M-AX.

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FLAT BLADE CARRIER ASSEMBLY
ITEM ITEM QTY PART NUMBER DESCRIPTION
1 1 15241 WELDMENT, BLADE CARRIER, FLAT, BOTTOM DISK, M-AX
2 1 15245 PLATE, FLAT BLADE CARRIER, TOP, M-AX
3 1 15246 PLATE, FLAT BLADE CARRIER, SPACER, M-AX
4 1 15201 SPACER, BEARING HOUSING, #8
5 4 15099 PUCK, 3.500 DIA X 0.625, 3 HOLE
6 4 15097 BLADE, FLAT, 18.000 X 8.500 X 0.625
7 12 Hardware BOLT, HH, 3/4-16 X 3, GRD 8, ZINC
8 8 Hardware WASHER, FLAT, 3/4, F436, ZINC
9 8 Hardware BOLT, HH, 3/4-10 X 5, GRD 8, ZINC
10 12 Hardware NUT TOPLOCK FLANGED 3/4-16 GRD G ZINC
Optional Blade Assembly
Flat Blade Assembly - 4 blades
Parts List

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FLAT BLADE CARRIER ASSEMBLY
ITEM ITEM QTY PART NUMBER DESCRIPTION
1 1 15241 WELDMENT, BLADE CARRIER, FLAT, BOTTOM DISK, M-AX
2 1 15245 PLATE, FLAT BLADE CARRIER, TOP, M-AX
3 1 15246 PLATE, FLAT BLADE CARRIER, SPACER, M-AX
4 1 15201 SPACER, BEARING HOUSING, #8
5 4 15099 PUCK, 3.500 DIA X 0.625, 3 HOLE
6 4 15097 BLADE, FLAT, 18.000 X 8.500 X 0.625
7 12 Hardware BOLT, HH, 3/4-16 X 3, GRD 8, ZINC
8 8 Hardware WASHER, FLAT, 3/4, F436, ZINC
9 8 Hardware BOLT, HH, 3/4-10 X 5, GRD 8, ZINC
10 12 Hardware NUT TOPLOCK FLANGED 3/4-16 GRD G ZINC
Optional Blade Assembly
Flat Blade Replacement - 4 blades
1. Perform maintenance on a level surface with the unit blocked off the ground. Shut off the hydrau-
lic power supply and disconnect hydraulic couplers.
2. Tighten blades bolts every use or every eight hours, and inspect blades for damage.
3. The Flat blades are reversible - just turn over the blade - all four (4) blades must be turned over at
the same time. When blades are replaced an entire new set of four (4) blades, pucks, bolts and
washers must be replaced at the same time. Follow the instructions below.
To Replace Blades:
1. Remove Nylock nuts and washers from plate on the cutter deck to expose access hole. Reference
item #2 on the Parts drawing of 72 M-AX on page 12.
2. Through the exposed access hole rotate the blade carrier to line up the nut of the blade for access.
3. Insert a 1-1/8”socket through the access hole and remove 3 Toplock nuts for each blade.
4. Pound out the bolt using a drift pin or center punch to prevent damaging the threads.
5. Slide puck and blade out.
6. Clean blades, pucks, bolts, locknuts and washer with cleaner/degreaser. Prior to assembly, ensure
all hardware is dry and free of any contaminents including the carrier assembly.
7. Insert the new puck and blade between carrier assembly. Line up with the bolt holes. Note: If the
reverse side of the blades have not been used - turn the blade over. All four blades must be turned
over at the same time. The blade carrier cuts in one direction - counter clockwise. Worn or dam-
aged pucks, bolts, and washers must be replaced in sets.
8. Apply Loctite #243 to the first 10 bolt threads to ensure coverage.
9. Assemble the bolt, washer, and the nut to the carrier as shown on the opposite page.
10. Torque the blade bolts to 270 ft/lbs.
11. Confirm the blade carrier rotates freely and is clear of any obstructions.
12. Install the plate of the access hole on the top of the 72 M-AX.

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Dealer Instructions / Purchaser
Checklist
The checklist below is important information for the Dealer to review with the Purchaser.
Mail, email, or fax a copy to:
Cross-Tech Manufacturing, Inc.
33877 Gendreau Road
Crosslake, MN 56442-9303
email: [email protected]
Also available to fill out on-line: www.brushwolf.com
Explain and alert buyer of High Flow motor and case drain.
No auxiliary hydraulics over 40 Gallons Per Minute (GPM).
Explain and demonstrate operation of Brush Wolf 72 M-AX.
Explain use and demonstrate use of Cab Safety Door.
Explain and demonstrate bearing housing/lube level check.
Explain and demonstrate inspection points and frequency; including nuts,
bolts, blades, hoses, etc.
Review the Owner/Operator Manual Safety Instructions.
Alert buyer not to remove safety devices or decals.
Advise buyer that all safety decals are available upon request.
SAFETY OPERATIONS CHECKLIST
Dealer Information
Dealer Company Name
Technician Name
City State/Province/ Region

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Warranty Registration Form
Thank you for choosing Brush Wolf. Please complete the form below to register your Brush Wolf prod-
uct. There is a form available to fill out on-line at www.brushwolf.com. Please complete the Warranty
Registration form within 30 days of purchase date to qualify for warranty.
Purchaser Information
Company
Contact Name
Phone
Email
Address 1
Address 2
City State/Province/Region
Zip/Postal Code Country
Model Number: Serial Number:
Date of purchase
MM DD YYYY
Would you recommend this product to your friends? Yes No
Cross-Tech Manufacturing, Inc.
33877 Gendreau Road
Crosslake, MN 56442-9303
email: [email protected]
Also available to fill out on-line: www.brushwolf.com

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WARRANTY INFORMATION:
The Warranty Claim Form must be completed in full detail and received in good condition. Cross-Tech
Manufacturing, Inc. limits it warranty to the hydraulic motor, gearbox, bearing housing and cylinders for
a period of one (1) year from the original date of sale. A two (2) year warranty is included on the struc-
tural steel from the date of sale.
A Warranty Registration Form for this equipment must exist before warranty claims will be valid. If a de-
fect in a Cross-Tech Manufacturing product is discovered during the applicable warranty period, Cross-
Tech will repair or replace, at its option the motor, gearbox or defective part. Cross-Tech Manufacturing,
Inc. purchased components are subject to the original manufacturer’s warranty.
The Equipment owner is responsible for proper maintenance. If the product is not maintained, all war-
ranties by Cross-Tech Manufacturing will be null and void. Any modification to the product other than
those made by Cross-Tech Manufacturing will cause this warranty to be void; including any modification
or disassembly of motors, gearbox, bearing housing, cylinders, etc.
This warranty does not extend to repairs, adjustments, or replacement of a Cross-Tech product or part
that results from misuse, negligence, alteration, modification tampering, improper maintenance or
improper operation of the product. Claims submitted must be legible and in good condition. Cross-Tech
does not cover service mileage, downtime or replacement of the attachment.
If a problem arises during the warranty period please contact your local dealer. The warranty is null
and void if the product is modified or repaired without written consent from Cross-Tech Manufactur-
ing. Cross-Tech units used in rental fleets are covered with a ninety (90) day warranty on the hydraulic
motor, gearbox, bearing housing, cylinders and structural steel with a valid warranty registration on file
within thirty (30) days of the purchase date.
To file a warranty claim, please contact your dealer or Cross-Tech Manufacturing.
Copyright ©2015 Cross-Tech Manufacturing, Inc. All rights reserved.
Cross-Tech Manufacturing, Inc.
33877 Gendreau Road
Crosslake, MN 56442
218-692-1050
www.brushwolf.com