Brush Wolf Open Front Series User manual

COMPACT UTILITY LOADER/SKID STEER BRUSH CUTTERS
Open Front/Compact Series
4201
4801 LF | 4801 SF
Operator’s Manual
WHY READ THIS MANUAL?
Before operating your new Brush Wolf brush cutter, read this entire manual to understand
1) safety precautions, 2) operating instructions, and 3) maintenance schedule to help keep
you safe and your equipment running smoothly for years to come.

218-692-1050 | brushwolf.com
TAKE A MINUTE TO WRITE DOWN THE FOLLOWING INFORMATION
FOR FUTURE SERVICE, REPAIR, AND WARRANTY INQUIRIES.
DATE OF PURCHASE ____________________________________________________
MODEL NO. ____________________________________________________
SERIAL NO. ____________________________________________________
DEALER NAME ____________________________________________________
SALES REP NAME ____________________________________________________
DEALER PHONE NO. ____________________________________________________
DEALER EMAIL ____________________________________________________
DEALER ADDRESS ____________________________________________________
____________________________________________________
OWNER REFERENCE INFORMATION

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THANK YOU
Welcome to the Brush Wolf family!
You’ve made a smart choice! We hope
you love your brush cutter as much as
we love making it. If you have any issues,
please contact us at any time. We’re
here to help.
Brush Wolf
218-692-1050
[email protected]
www.brushwolf.com
06/06/24
SAFETY FIRST! ..................................................2-3
OPERATING YOUR BRUSH CUTTER.....4-7
MAINTENANCE ............................................... 8-10
TROUBLESHOOTING ......................................11
HOW TO REPLACE BLADES.......................12
PARTS SECTION
4201..................................................................14-15
4801 LF | 4801 SF......................................16-17
WARRANTY INFORMATION .........................18
WHAT’S INSIDE

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SITE INSPECTION
Before operating your brush cutter, carefully
inspect the area to be cleared. Remove any
items that may be picked up and thrown
by the cutting blades, such as wire, pipes,
rocks, etc. Mark objects that are too large
to move. This is an important step to avoid
personal injury, damage to property, the
brush cutter, or your compact utility loader/
skid steer. If an object is struck while
operating the brush cutter, immediately shut
down power to both the brush cutter and
the compact utility loader/skid steer. Any
damage should be corrected and tested
before the continuation of cutting.
COMPACT UTILITY LOADER/SKID
STEER AUXILIARY HYDRAULIC FLOW
Check the specifications of your brush
cutter’s rated gallons per minute (GPM) to
correctly match the hydraulic flow of your
compact utility loader/skid steer to ensure
proper operation.
FOR YOUR SAFETY, READ THESE INSTRUCTIONS.
The following safety instructions are provided to alert you to precautions that, if
not followed, may cause serious injury to yourself or to others. Please read these
instructions completely. Brush Wolf/Cross-Tech Manufacturing cannot cover every
incident that might be a hazard. Extreme caution should be used at all times. Only
use your Brush Wolf brush cutter for the purpose for which it has been designed.
EQUIPMENT INSPECTION
Disconnect the unit from the compact utility
loader/skid steer. To inspect or to make
repairs under the cutter deck, always block
the unit securely to prevent accidental
release of the lift mechanism.
Inspect all hydraulic connections to ensure
they are tight, and hoses and shields are in
good condition before applying pressure.
Hydraulic fluid can escape under pressure
and may cause serious injury or death. If
this type of injury occurs, seek medical
attention immediately.
SAFETY GEAR
Wear safety goggles, hearing protection, and
a hard hat. If using a skid steer, only operate
the skid steer behind a shatterproof forestry-
rated door and cab.
SAFETY FIRST!

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BRUSH WOLF OPERATOR’S MANUAL | SAFETY FIRST!
DO NOT operate near bystanders, vehicles,
pets, livestock, or buildings. Objects may
discharge while cutting with the brush cutter
and has the potential to cause serious injury.
DO NOT operate the brush cutter until
everyone on your work crew is alerted to the
dangers of walking up to the brush cutter while
in operation.
DO NOT operate the brush cutter in conditions
with poor visibility.
DO NOT operate while intoxicated or if taking
medications that may impair your senses or
reactions.
DO NOT allow children to operate the brush
cutter. Only individuals with compact utility
loader/skid steer experience who are well
acquainted with the rules of safe operation
should be allowed to operate the brush cutter.
DO NOT operate a skid steer without a
shatterproof forestry-rated door and cab.
DO NOT place hands, feet, or other objects
under the deck while the brush cutter is in
operation.
DO NOT raise the mower deck while blades
are rotating. Operation with the mower raised
will expose the cutting blades and may cause
serious injury or death to yourself or others.
DO NOT allow anyone or any item on top of the
mower deck while in operation.
DO NOT expose the underside of the blades
towards the you or the cab while in operation.
DO NOT continue operation if an unexpected
object is struck. IMMEDIATELY shut down
power to both the brush cutter and the
compact utility loader/skid steer. Disconnect
the hydraulic couplers from the power source.
Evaluate the damage, repair, and then test the
unit before operation.
DO NOT leave the brush cutter unattended
while in a raised position. Always make sure
both the runners are placed firmly on the
ground and shut down the compact utility
loader/skid steer.
DO NOT attempt to straighten blades. Order
replacement blades if blades are bent, cracked,
or damaged.

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Verify your compact utility loader/skid
steer’s hydraulic flow to ensure it is
within the brush cutter’s rating range.
The brush cutter’s gallons per minute
(GPM) rating is located on the serial tag
of the brush cutter.
OPERATING YOUR BRUSH CUTTER
CHECK BLADES
Inspect blades to ensure they are sharp,
tightened correctly, and intact. Look for
damage, dullness, and cracks. See page 9
for details.
CHECK HYDRAULIC FLUID
A low level could indicate a leak and require
a closer inspection of your unit. See page 9
for details.
CHECK NUTS & BOLTS
Tighten the 1) blade carrier to the gearbox,
2) blade bolts/nuts, and 3) hydraulic motor
mount nuts to torque specification listed on
page 10.
INSPECT THE DRIVE COMPONENTS
Remove any foreign material.
 IMPORTANT: CHECK THESE ITEMS PRIOR TO OPERATING
 START HERE
FIGURE 1: SERIAL TAG

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3) Inspect the hydraulic couplers and wipe off
water, dust, or any debris which can damage
hydraulic components. Once cleaned,
connect the couplers from the cutter to the
auxiliary hydraulic system on the compact
utility loader or skid steer.
4) Make sure the hoses are routed in a way
that allows the head to make a full range of
motion. If hoses are too long and pinching
or binding, they can be made shorter by
loosening the hose bracket and feeding
additional hose length back to the cutter
deck.
5) Confirm all safety measures have been
completed per the Safety First! section
(pages 2-3). Most importantly, make sure
the area is clear of people and pets.
1) Connect the brush cutter to your compact
utility loader or skid steer with the universal
Quick Tach Mount Plate.
2) Once connected, visually check the lock
pins to make sure the brush cutter is
securely locked into place. Raise the brush
cutter to 12” above ground level. Loop the
lift limit chain through the chain ring on your
compact utility loader/skid steer and back to
the chain bracket on your brush cutter.
NOTE: All Brush Wolf brush cutters come
from the factory with the female flat faced
coupler on the pressure line and the male
coupler on the return line.
 CONNECTING THE BRUSH CUTTER
BRUSH WOLF OPERATOR’S MANUAL | OPERATING YOUR BRUSH CUTTER
FIGURE 2: HOSE ENDS
PRESSURE
RETURN
CASE DRAIN
(IF REQUIRED)

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 OPERATING STEPS
When temperatures are below zero, allow
additional time for hydraulic fluid to warm
up.
4) Maintain compact utility loader/skid steer
speed appropriate for the volume of brush
to prevent stalling.
5) Stay alert for drop-offs, rocks, holes,
abandoned wells, and septic tanks. Do not
operate or drive across a steep embankment
as this may cause a rollover and possible
injuries or death.
6) To cut large diameter brush and trees,
move forward slowly to make the cut.
1) Start the engine. The runners of the brush
cutter should be as close to the ground
as possible. Never raise the brush cutter
more than seven (7) inches off the ground
while in operation.
2) Slowly apply hydraulics to the brush cutter
and increase the engine speed to high idle.
Make sure the unit is operating smoothly
before moving the compact utility loader/
skid steer forward.
3) Check for proper blade rotation. Blades
should spin COUNTERCLOCKWISE as
viewed from above (see Figure 3). If
rotation is reversed (clockwise), either
inverse the flow from your machine or switch
the QD couplers on the hose ends.
FIGURE 3: BLADE ROTATION
COUNTERCLOCKWISE
BRUSH WOLF OPERATOR’S MANUAL | OPERATING YOUR BRUSH CUTTER

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When done, lower lift arms, make sure the
cutter is placed flat on the ground, throttle
down on the compact utility loader/skid steer,
and shut off the hydraulic flow to the brush
cutter. Stop the engine and engage the parking
brake. Noise at shut down is normal.
DISCONNECTING HOSES:
To disconnect hoses, use proper hand
protection as the couplers may be hot. Always
replace caps on hoses once removed to
prevent contamination.
 WHEN DONE CUTTING
BRUSH WOLF OPERATOR’S MANUAL | OPERATING YOUR BRUSH CUTTER

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BRUSH WOLF BRUSH CUTTERS ARE BUILT TO STRICT STANDARDS AND
WILL DELIVER YEARS OF DEPENDABLE SERVICE WHEN YOU FOLLOW THESE
MAINTENANCE GUIDELINES...
MAINTENANCE
 MAINTENANCE SCHEDULE
See pages 9-10 for details.
ITEM BEFORE
EACH USE
DAILY OR
EVERY 8 HOURS
AS
NEEDED
Blades Inspect
Gearbox Lubricant Check Oil
Blade Bolt/Nuts Torque to 775 -lbs
Gearbox Castle Nut Torque to 450 -lbs
Gear Mounting Bolts Torque to 275 -lbs
Hydraulic Motor Mount Bolts Torque to 75 -lbs
Block (high flow units only) Torque to 420 -lbs
Shear Bolt Grade 2 Torque to 75 -lbs
Hoses & Hose Safety Shield Inspect
Gearbox Shaft Inspect
Brush Cutter Clean
CAUTION: Perform maintenance on a level surface with the unit firmly on the ground and
blocked. Shut down the compact utility loader/skid steer and remove hydraulic hoses from
the power source.
DO NOT loan your brush cutter to another compact utility loader/skid steer owner. The
potential exists for hydraulic contamination and could shorten the life of your compact utility
loader/skid steer or the hydraulic motor on your brush cutter. Contamination of the hydrolic
motor voids the warranty.

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INSPECT BLADES
Inspect blades before each use to ensure
they are sharp, tightened correctly, and
intact. Look for damage, dullness, and
cracks. Blades should rotate freely and be
clear of obstructions. Replace the entire set
of blades if damaged.
CAUTION: Always replace the entire set of
blades. Never weld or straighten damaged
blades, as loss of blade integrity may result.
CHECK HYDRAULIC HOSES AND HOSE
SAFETY SHIELD
Check for wear, damage, or leaks. Replace if
damaged.
INSPECT THE DRIVE COMPONENTS
Inspect before each use and remove foreign
material.
BRUSH WOLF OPERATOR’S MANUAL | MAINTENANCE
 BEFORE EVERY OPERATION
1
2
1. Fill Hole with
breather cap.
2.Plug for oil level.
Oil should be at
the same level.
DO NOT overfi ll.
FIGURE 4: GEARBOX LUBRICATION
DIAGRAM
CHECK THE GEARBOX FOR PROPER
LUBRICANT
To check the lubricant level, remove the
pipe plug from the side of the gearbox. The
lubricant should be the same level as the
plug (see Figure 4). If low, add 85W-140
gear lube.
IMPORTANT: DO NOT overfill as too much
lubricant may rupture the gearbox seals.
Co� er pin

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BRUSH WOLF OPERATOR’S MANUAL | MAINTENANCE
 BEFORE EVERY OPERATION
CHECK NUTS & BOLTS
Every Brush Wolf brush cutter is tested at
the factory and all nuts and bolts have been
tightened to specifications. We recommend
you check the nuts and bolts after the first 4
to 6 hours of operation; then daily or every
eight (8) hours.
Tighten the nuts that secure the blades
to the blade carrier every eight (8) hours.
Torque the nuts to 775 ft-lbs with a 1-11/16”
socket wrench. The nuts are located under
the access plate on the top of the blade
carrier (see Figure 5).
 AS NEEDED
CLEAN THE BRUSH CUTTER as needed
and look for potential damage or obstruction
that could result in poor performance.
Make sure all SAFETY DECALS are visible.
Also, tighten the castle nut holding the blade
carrier to the output shaft of the gearbox.
Torque to 450 ft-lbs with a 1-1/2” socket
wrench. Insert cotter pin through hole on
gearbox output shaft (see Figure 4).
Tighten gear mounting bolts daily or every
eight (8) hours. Torque the bolts to 275 ft-
lbs.
Tighten hydraulic motor mount bolts daily or
every eight (8) hours. Torque the bolts to 75
ft-lbs.
Tighten block (high flow units only) daily or
every eight (8) hours. Torque to 420 ft-lbs.
Tighten shear bolt grade 2 daily or every
eight (8) hours. Torque to 75 ft-lbs.
Shear bolt protection (also known as
butter bolt) at the motor coupler. It is
recommended to carry additional shear
bolts (½-13 x 3” GRD 2) obtained at most
hardware stores. Only use grade 2 when
replacing.
ACCESS COVER
BLADE NUT
FIGURE 5: ACCESS COVER

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TROUBLESHOOTING
*May damage hydraulic motor and void warranty.
ISSUE POTENTIAL CAUSES
CONSULT YOUR DEALER OR CONTACT BRUSH WOLF FOR
ANY QUESTIONS OR ADDITIONAL HELP.
Loss of Power
• Low hydraulic fluid level
• Overheated hydraulic fluid*
• Contaminated hydraulic fluid*
• Low gearbox lubricant level
• Broken gearbox/motor shear pin
• Missing input shaft key
Excessive
Unit Vibration
• Dull, broken, or damaged blades
• Bent gearbox shaft
• 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
• Bent gearbox shaft
• Loose or missing motor drain plug

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HOW TO REPLACE BLADES
1) Take off the access cover (see Figure 5
on page 10) by removing the nuts and
washers.
2) Through the exposed access hole, rotate
the blade carrier to line up the nut of the
blade for access.
3) Insert a 1-11/16” socket through the
access hole and remove the nut and
drop the bolts. Caution: once nuts are
removed, blades will fall to the ground if not
supported.
4) Clean new bolts, lock-nuts, and washer
with cleaner/degreaser. Prior to assembly,
ensure all hardware is dry and free of
any contaminants including the carrier
assembly.
5) Use Primer Loctite on the bolts and nuts
according to the directions on the label.
Apply Loctite #243 to the first 10 bolt
threads to ensure coverage.
6) Assemble the new blade, the bolt, and the
nut to the carrier. The blade carrier cuts in
one direction, counterclockwise.
7) Torque the blade bolts to 775 ft-lbs. using a
1-11/16” socket.
8) Confirm the blade carrier rotates freely and
is clear of any obstructions.
9) Reinstall the access cover plate.
Perform replacement on a level surface with the brush cutter blocked off the ground.
Shut off the hydraulic power supply and disconnect hydraulic couplers.

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PARTS
SECTION
ONLY USE GENUINE OEM PARTS
ORDER PARTS DIRECTLY
FROM BRUSH WOLF
BY CALLING 218-692-1050

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PARTS: 4201
DETAIL A
A
4X
1
7
8
9
10
11
11
1216
13
14
15
6
17
18
19
21
28
22
32
24
25
4X
26
27
27
25 2X
2X
29
24
2X
2X
30 4X
32
2X
23
20
31
3
2
2
5
4

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ONLY USE GENUINE OEM PARTS. ORDER PARTS FROM BRUSH WOLF AT 218-692-1050
ITEM ITEM
QTY
PART
NUMBER DESCRIPTION
1 1 15096 WELDMENT, BLADE CARRIER, 20.000 X 5.000 X 1.000 PLATE
2 2 15265 BLADE, 14.750 X 4.000 X .500
3 2 15066 BOLT, D-BOLT, 1 1/8-12, BW
4 2 15148 NUT, TOP LOCK, 1 1/8-12, GRADE C, PLAIN
5 2 30089 WASHER, FLAT, 1 1/8, F436, ZINC
6 1 17038 DECAL KIT, 4201
7 1 15102 GUARD, COUPLING, BW, 4201
82 15631 HOSE WHIP ASSEMBLY, -8 ORFS, FEMALE SWIVEL COUPLINGS, 0.500 X 66.000 HOSE
9 1 15054 PLATE, ACCESS, 2 HOLE, 5.250 X 3.250 X 0.250
10 1 17032 WELDMENT, FRAME, 4201 DINGO
10 1 17033 WELDMENT, FRAME, 4201 MT-50
11 4 15584 ADAPTER, STRAIGHT, #8 MORFS, #10 MORB
12 1 15263 CLAMP, BODY, TWO PIECE, 22MM, TWO HOSE
13 1 15078 COUPLER, FLAT FACED, 1/2 FEMALE, 7/8-14, O-RING BOSS
14 1 15079 COUPLER, FLAT FACED, 1/2 MALE, 7/8-14, O-RING BOSS
15 1 15123 COUPLING, STD, 1.250 MOTOR, 1.375 GB, 5.500
16 1 15264 COVER PLATE, CLAMP, 22MM, TWO HOSE
17 1 15091 GEARBOX, 40 HP, 1.375 INPUT, 12 TOOTH SPLINE OUTPUT, 1:1.93 RATIO
18 1 15352 MOTOR, 4.9 CU IN, SAE “A” 2 BOLT, 7/8-14 SAE O-RING PORTS, 1.250 DIA X 1.250 KEYED
SHAFT, 3500/750 RELIEF, EATON
19 2 30026 BOLT, HH, 1/2-13 X 2 UNC, GRD 5, ZINC
20 1 30029* BOLT, HH, 1/2-13 X 3, GRD 2, ZINC
21 1 30052 BOLT, HH, 5/16-18 X 1 3/4, GRD 5, ZINC
22 4 30054 BOLT, HH, 5/16-18 X 3/4, GRD 5, ZINC
23 4 30071 NUT TOPLOCK 5/8-11 GRD8 ZINC
24 3 30062 NUT, NYLOCK, 1/2-13, ZINC
25 4 30065 NUT, NYLOCK, 3/8-16, ZINC
26 2 30078 SET SCREW_CP_1_4-20X3_8 UNC
27 4 30083 WASHER, FLAT, 3/8, ZINC
28 430082 WASHER, FLAT, 5/16, ZINC
29 2 15381 WASHER, NORD-LOCK, 0.500 X 1.000 OD, ZINC
30 4 15380 WASHER, NORD-LOCK, 0.625 X 1.210 OD, ZINC
31 1 30093 WASHER, SPRING LOCK, .500, ZINC
32 5 30091 WASHER, SPRING LOCK, 5/16, ZINC
* SHEAR BOLT

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PARTS: 4801 LF
|
4801 SF
DETAIL A
A
5
21
23
3
4
6
1
9
10
13
14
7
18 24 28
20
26
2
8
12
28
17
23
21
19
27
16
11
22
7
2X
4X
2X
2X
15 19 25
4X
4X
2
2
5
35
3
4
4

17
ITEM ITEM
QTY
PART
NUMBER DESCRIPTION
1 1 15098 WELDMENT, BLADE CARRIER, 26.000 X 5.000 X 1.000 PLATE
2 2 15066 BOLT, D-BOLT, 1 1/8-12, BW
3 2 15148 NUT, TOP LOCK, 1 1/8-12, GRADE C, PLAIN
4 2 15265 BLADE, 14.750 X 4.000 X .500
5 2 30089 WASHER, FLAT, 1 1/8, F436, ZINC
6 1 17039 DECAL KIT, 4801
7 1 15067 GUARD, COUPLING, BW, STD
82 15597 HOSE WHIP ASSEMBLY, -8 ORFS, FEMALE SWIVEL COUPLINGS, 0.750 X 78.000 HOSE
9 1 15054 PLATE, ACCESS, 2 HOLE, 5.250 X 3.250 X 0.250
10 1 17034** WELDMENT, FRAME, 4801 STD
10 1 17035** WELDMENT, FRAME, 4801 DINGO
10 1 17036** WELDMENT, FRAME, 4801 MT-50
10 1 17037** WELDMENT, FRAME, 4801 ASV
11 4 15584 ADAPTER, STRAIGHT, #8 MORFS, #10 MORB
12 1 15248 CLAMP, BODY, TWO PIECE, 30MM, TWO HOSE
13 1 15078 COUPLER, FLAT FACED, 1/2 FEMALE, 7/8-14, O-RING BOSS
14 1 15079 COUPLER, FLAT FACED, 1/2 MALE, 7/8-14, O-RING BOSS
15 1 15123 COUPLING, STD, 1.250 MOTOR, 1.375 GB, 5.500
16 1 15249 COVER PLATE, CLAMP, 30MM, TWO HOSE
17 1 15093 GEAR BOX, 62HP, 1:1.93 RATIO
18 1 15353** STANDRARD FLOW BRUSH CUTTER - MOTOR, 6.2 CU IN, SAE “A” 2 BOLT, 7/8-14-12 SAE
O-RING PORTS, 1.250 DIA X 1.250 KEYED SHAFT, 3500/750 RELIEF, EATON
18 1 15352** LOW FLOW BRUSH CUTTER - MOTOR, 4.9 CU IN, SAE “A” 2 BOLT, 7/8-14 SAE O-RING
PORTS, 1.250 DIA X 1.250 KEYED SHAFT, 3500/750 RELIEF, EATON
19 2 30026 BOLT, HH, 1/2-13 X 2 UNC, GRD 5, ZINC
20 1 30029* BOLT, HH, 1/2-13 X 3, GRD 2, ZINC
21 1 30053 BOLT, HH, 5/16-18 X 2 1/2, GRD 5, ZINC
22 4 30054 BOLT, HH, 5/16-18 X 3/4, GRD 5, ZINC
23 3 30062 NUT, NYLOCK, 1/2-13, ZINC
24 4 30064 NUT, NYLOCK, 3/4-10, ZINC
25 4 30065 NUT, NYLOCK, 3/8-16, ZINC
26 2 30078 SET SCREW_CP_1_4-20X3_8 UNC
27 4 30083 WASHER, FLAT, 3/8, ZINC
28 430082 WASHER, FLAT, 5/16, ZINC
29 2 15381 WASHER, NORD-LOCK, 0.500 X 1.000 OD, ZINC
30 4 15379 WASHER, NORD-LOCK, 0.750 X 1.210 OD, ZINC
31 1 30093 WASHER, SPRING LOCK, .500, ZINC
32 5 30091 WASHER, SPRING LOCK, 5/16, ZINC
* SHEAR BOLT
** DEPENDS ON THE MODEL OF BRUSH CUTTER
ONLY USE GENUINE OEM PARTS. ORDER PARTS FROM BRUSH WOLF AT 218-692-1050

18
Warranties are valid from date of purchase with a warranty registration on file. Scan the QR code below
or go to brushwolf.com/warranty to file a claim and view warranty details.
Structural Components
Materials & Weldment
Bearing Housing
1.5-YEAR LIMITED WARRANTY
Gearbox
1.5-YEAR LIMITED WARRANTY
Hydraulic Motor
1.5-YEAR LIMITED WARRANTY
Cylinders
1.5-YEAR LIMITED WARRANTY
PROTECT YOUR PURCHASE.
WARRANTY INFORMATION