Ventrac LC150 User manual





Revised 09/16/15
09.10033 Rev. 03


2






If you need to contact an authorized Ventrac dealer for information on servicing your product,
always provide the product model and serial numbers.
Please ll in the following information for future reference. See the picture(s) below to nd the
location of the identication numbers. Record them in the spaces provided.
Date of Purchase: __________________________________________________________________
Dealer:___________________________________________________________________________
Dealer Address:____________________________________________________________________
____________________________________________________________________
Dealer Phone Number: ______________________________________________________________
Dealer Fax Number: ________________________________________________________________
Model # (A): ___________________________
Serial # (B): ____________________________
Afx Part/Serial Number label here.
Venture Products Inc. reserves the right to make changes
in design or specications without obligation to make like
changes on previously manufactured products.
B
A

TABLE OF CONTENTS
3
 
Product Description................................................................................................................................4
Why Do I Need an Operator’s Manual? .................................................................................................4
Using Your Manual .................................................................................................................................5
Manual Glossary ....................................................................................................................................5
 
Safety Decals .........................................................................................................................................6
General Safety Procedures....................................................................................................................8
Training Required...................................................................................................................................8
Personal Protective Equipment Requirements ......................................................................................8
Operation Safety ....................................................................................................................................8
Preventing Accidents..............................................................................................................................9
Keep Riders O󰀨......................................................................................................................................9
Operating On Slopes............................................................................................................................10
Roadway Safety...................................................................................................................................10
Truck Or Trailer Transport ....................................................................................................................10
Maintenance......................................................................................................................................... 11
Fuel Safety........................................................................................................................................... 11
Hydraulic Safety ...................................................................................................................................12
 
Daily Inspection....................................................................................................................................14
Attaching ..............................................................................................................................................14
Detaching.............................................................................................................................................14
Operating Procedure............................................................................................................................15
 
Cleaning and General Maintenance.....................................................................................................16
Belt Inspection......................................................................................................................................16
Rotor Drive Belt Replacement..............................................................................................................16
Cutter Teeth Replacement ...................................................................................................................16
Lubrication Locations ...........................................................................................................................17
Gearbox Oil ..........................................................................................................................................17
Storage.................................................................................................................................................17
Maintenance Schedule.........................................................................................................................18
Maintenance Checklist.........................................................................................................................18
 
Dimensions ..........................................................................................................................................19
Features...............................................................................................................................................19
 
Main Frame, Blade/Stand Frame, & Hydraulics...................................................................................20
Belt Drive (Power Unit to Gearbox)......................................................................................................22
Belt Drive (Gearbox to Cutter/Rotor)....................................................................................................24
Rotor Shield, Belt Cover, & Safety Decals ...........................................................................................26
 




The Ventrac LC150 stump grinder is designed for quick removal of unwanted stumps and roots. Heavy duty
carbide cutters provide extended and e󰀨ective performance in spite of dirt, stones, and debris in the work
area. The stump grinder mounted on a 3000 series power unit creates an agile, powerful machine for even
the toughest jobs in the tightest places.
The multi-function arm is controlled by the power unit’s auxiliary hydraulic lever. It can be used as a depth
gauge to achieve a common grinding depth, a blade to rell the hole and level the area where the stump
was ground down, and a stand to hold the stump grinder’s hitch arms at the proper height for reattachment
when removed from the power unit.

This manual has been created to help you gain the important knowledge of what is needed to safely
operate, maintain, and service your machine. It is divided into sections for convenient reference of the
appropriate section.
You must read and understand the operator’s manual for each piece of Ventrac equipment you own. Read-
ing the operator’s manual will help you become familiar with each specic piece of equipment. Under-
standing the operator’s manual will help you, as well as others, avoid personal injury and/or damage to the
equipment. Keep this manual with the machine at all times. The manual should remain with the machine
even if it is sold. If this manual becomes damaged or unreadable, it should be replaced immediately. Con-
tact your local Ventrac dealer for a replacement.
When using a Ventrac attachment, be sure to read and follow the safety and operating instructions of both
the power unit and the attachment being used to ensure the safest operation possible.
The information in this manual provides the operator with the safest procedures to operate the machine
while getting the maximum use out of the unit. Failure to follow the safety precautions listed in this manual
may result in personal injury and/or damage to the equipment.
Venture Products Inc. is pleased to provide you with your new Ventrac stump grinder! We hope that Ventrac equipment will
provide you with a ONE Tractor Solution.

INTRODUCTION


Throughout this manual, you will encounter special messages and symbols that identify potential safety
concerns to help you as well as others avoid personal injury or damage to the equipment.

This symbol identies potential health and
safety hazards. It marks safety precautions.
Your safety and the safety of others is involved.

There are three signal words that describe the level of safety concern: Danger, Warning, and Caution.
Safety should always be the #1 priority when working on or operating equipment. Accidents are more likely
to occur when proper operating procedures are not followed or inexperienced operators are involved.
Note: Right-Hand and Left-Hand orientations may be referred to at di󰀨erent places throughout this manual.
Right-Hand and Left-Hand is determined as if sitting on the power unit seat facing forward.

Indicates a potentially hazardous situation
which, if not avoided, could result in death or
serious injury.
Indicates an imminently hazardous situation
which, if not avoided, will result in death or
serious injury. This signal word is limited to the
most extreme cases.
Indicates a potentially hazardous situation
which, if not avoided, may result in minor or
moderate injury and/or property damage. It may
also be used to alert against unsafe practices.

 A Ventrac tractor or other Ventrac engine powered device that may be operated by itself or
with an attachment or accessory.
 A piece of Ventrac equipment that requires a Power Unit for operation.
 A device that attaches to a Power Unit or Attachment to extend its capabilities.
 Describes any “Attachment” or “Accessory” that is used in conjunction with a power unit.




The following safety decals must be maintained on your LC150 stump grinder.
Keep all safety decals legible. Remove all grease, dirt, and debris from safety decals and instructional
labels. If any decals are faded, illegible, or missing, contact your dealer promptly for replacements.
When new components are installed, be sure that current safety decals are a󰀩xed to the replacement
components.
AUnder Shield B
B
E
E
C
F
D
G

SAFETY

   
A Danger, Shield Missing 00.0062 1
B Warning, Keep Hands & Feet Clear 00.0123 2
C Warning, Moving Parts 00.0216 1
D Warning, Read Owner’s Manual 00.0217 1
E Warning, Pinch Point 00.0218 2
F Warning, Do Not Reach 00.0219 1
G Warning, General Safety 00.0220 1
AB C
D E F
G

SAFETY




• The owner of this machine is solely responsible for properly training the operators.
• The owner/operator is solely responsible for the operation of this
machine and prevention of accidents or injuries occurring to him/her-
self, other people, or property.
• Do not allow operation or service by children or untrained personnel.
Local regulations may restrict the age of the operator.
• Before operating this machine, read the operator’s manual and under-
stand its contents.
• If the operator of the machine cannot understand this manual, then it
is the responsibility of this machine’s owner to fully explain the material
within this manual to the operator.
• Learn and understand the use of all controls.
• Know how to stop the power unit and all attachments quickly in the event of an emergency.

It is the responsibility of the owner to be sure that the operators use the proper personal protective equip-
ment while operating the machine. Required personal protective equipment includes, but is not limited to,
the following list.
• Wear a certied ear protection device to prevent loss of hearing.
• Prevent eye injury by wearing safety glasses while operating the machine.
• Closed toe shoes must be worn at all times.
• Long pants must be worn at all times.
• When operating in dusty conditions, it is recommended that a dust mask be worn.

• Inspect machine before operation. Repair or replace any damaged, worn, or missing parts. Be sure
guards and shields are in proper working condition and are secured in place. Make all necessary
adjustments before operating machine.
• Some pictures in this manual may show shields or covers opened or removed in order to clearly illustrate
any instructions. Under no circumstance should the machine be operated without these devices in place.
• Alterations or modications to this machine can reduce safety and could cause damage to the machine.
Do not alter safety devices or operate with shields or covers removed.
• Before each use, verify that all controls function properly and inspect all safety devices. Do not operate
if controls or safety devices are not in proper working condition.
• Check parking brake function before operating. Repair or adjust parking brake if necessary.
• Observe and follow all safety decals.
• All controls are to be operated from the operator’s seat only.
• Always wear a seat belt if the machine has a roll cage/bar installed and in upright position.
• Ensure the attachment or accessory is locked or fastened securely to the power unit before operating.
• Ensure that all bystanders are clear of the power unit and attachment before operating. Stop machine if
someone enters your work area.
• Always be alert to what is happening around you, but do not lose focus on the task you are performing.
Always look in the direction the machine is moving.
• Look behind and down before backing up to be sure of a clear path.
• If you hit an object, stop and inspect the machine. Make all necessary repairs before operating machine again.
• Stop operation immediately at any sign of equipment failure. An unusual noise can be a warning of equipment
failure or a sign that maintenance is required. Make all necessary repairs before operating machine again.

SAFETY

General Safety Procedures
for Ventrac Power Units, Attachments, & Accessories
• If equipped with a high/low range feature, never shift between high and low range while on a slope.
Always move the machine to level ground and engage the parking brake before shifting range.
• Do not leave machine unattended while it is running.
• Always park the machine on level ground.
• Always shut o󰀨 engine when connecting attachment drive belt to the power unit.
• Never leave the operator’s seat without lowering the attachment to the ground, setting the parking
brake, shutting o󰀨 the engine, and removing the ignition key. Make sure all moving parts have come to
a complete stop before dismounting.
• Never leave equipment unattended without lowering the attachment to the ground, setting the parking
brake, shutting o󰀨 the engine, and removing the ignition key.
• Only operate in well-lit conditions.
• Do not operate when there is a risk of lightning.
• Never direct the discharge of any attachment in the direction of people, buildings, animals, vehicles, or
other objects of value.
• Never discharge material against a wall or obstruction. Material may ricochet back towards the operator.
• Use extra caution when approaching blind corners, shrubs, trees, or other objects that may obscure vision.
• Do not run the engine in a building without adequate ventilation.
• Do not touch the engine or the mu󰀪er while the engine is running or immediately after stopping the engine.
These areas may be hot enough to cause a burn.
• Do not change the engine governor settings or over-speed the engine. Operating engine at excessive speed
may increase the hazard of personal injury.
• To reduce the hazard of re, keep the battery compartment, engine, and mu󰀪er areas free of grass, leaves,
and excessive grease.

• Clear working area of objects that might be hit or thrown from machine.
• Keep people and pets out of mowing area.
• Know the work area well before operation. Do not operate where traction or
stability is questionable.
• Reduce speed when you are operating over rough ground.
• Equipment can cause serious injury and/or death when improperly used.
Before operating, know and understand
the operation and safety of the power
unit and the attachment being used.
• Do not operate machine if you are not in good physical and
mental health, if you will be distracted by personal devices, or are
under the inuence of any substance which might impair deci-
sion, dexterity, or judgment.
• Children are attracted to machine activity. Be aware of children
and do not allow them in the working area. Turn o󰀨 the machine if
a child enters the work area.
󰀨
• Only allow the operator on the power unit. Keep riders o󰀨.
• Never allow riders on any attachment or accessory.

SAFETY

General Safety Procedures
for Ventrac Power Units, Attachments, & Accessories

• Slopes can cause loss-of-control and
tip-over accidents, which can result in
severe injury or death. Be familiar with the
emergency parking brake, along with the
power unit controls and their functions.
• If power unit is equipped with a fold down
roll bar, it must be locked in the upright
position when operating on any slope.
• Use low range (if equipped) when operating
on slopes greater than 15 degrees.
• Do not stop or start suddenly when operating on slopes.
• Never shift between high and low range while on a slope. Always move the power unit to level ground
and engage the parking brake before shifting range or placing the power unit in neutral.
• Variables such as wet surface and loose ground will reduce the degree of safety. Do not drive where
machine could lose traction or tip over.
• Keep alert for hidden hazards in the terrain.
• Stay away from drop-o󰀨s, ditches, and embankments.
• Sharp turns should be avoided when operating on slopes.
• Pulling loads on hills decreases safety. It is the responsibility of the owner/operator to determine loads
that can safely be controlled on slopes.
• Transport machine with attachment lowered or close to the ground to improve stability.
• While operating on slopes, drive in an up and down direction when possible. If turning is necessary
while driving across slopes, reduce speed and turn slowly in the downhill direction.
• Assure a su󰀩cient supply of fuel for continuous operation. A minimum of one-half tank of fuel is recommended.

• Operate with safety lights when operating on or near roadways.
• Obey all state and local laws concerning operation on roadways.
• Slow down and be careful of tra󰀩c when operating near or crossing roadways. Stop before crossing
roads or sidewalks. Use care when approaching areas or objects that may obscure vision.
• If there is doubt of safety conditions, discontinue machine operation until a time when
operation can be performed safely.
• When operating near or on roadways, have a Slow Moving Vehicle Emblem clearly
displayed.

• Use care when loading or unloading machine into a truck or trailer.
• Use full width ramps for loading machine into a truck or trailer.
• The parking brake is not su󰀩cient to lock the machine during transport. Always secure the power unit
and/or attachment to the transporting vehicle securely using straps, chains, cable, or ropes. Both front
and rear straps should be directed down and outward from the machine.
• Shut o󰀨 fuel supply to power unit during transport on truck or trailer.
• If equipped, turn the battery disconnect switch to the O󰀨 position to shut o󰀨 electrical power.

SAFETY

General Safety Procedures
for Ventrac Power Units, Attachments, & Accessories

• Keep all safety decals legible. Remove all grease dirt, and debris from safety decals and instructional labels.
• If any decals are faded, illegible, or missing, contact your dealer promptly for replacements.
• When new components are installed, be sure that current safety decals are a󰀩xed to the replacement
components.
• If any component requires replacement, use only original Ventrac replacement parts.
• Always turn the battery disconnect to the O󰀨 position or disconnect the battery before performing any
repairs. Disconnect the negative terminal rst and the positive terminal last. Reconnect the positive
terminal rst and the negative terminal last.
• Keep all bolts, nuts, screws, and other fasteners properly tightened.
• Always lower the attachment to the ground, engage parking brake, shut o󰀨 engine, and remove the
ignition key. Make sure all moving parts have come to a complete stop before cleaning, inspection,
adjusting or repairing.
• If the power unit, attachment, or accessory requires repairs or adjustments not instructed in the operator’s
manual, the power unit, attachment, or accessory must be taken to an authorized Ventrac dealer for service.
• Never perform maintenance on the power unit and/or attachment if someone is sitting in the operator’s seat.
• Always use protective glasses when handling the battery.
• Check all fuel lines for tightness and wear on a regular basis. Tighten or repair them as needed.
• To reduce the hazard of re, keep the battery compartment, engine, and mu󰀪er areas free of grass,
leaves, and excessive grease.
• Do not touch the engine, the mu󰀪er, or other exhaust components while the engine is running or imme-
diately after stopping the engine. These areas may be hot enough to cause a burn.
• Allow the engine to cool before storing and do not store near an open ame.
• Do not change the engine governor settings or over-speed the engine. Operating engine at excessive
speed may increase the hazard of personal injury.
• Springs may contain stored energy. Use caution when disengaging or removing springs and/or spring
loaded components.
• An obstruction or blockage in a drive system or moving/rotating parts may cause a buildup of stored
energy. When the obstruction or blockage is removed, the drive system or moving/rotating parts may
move suddenly. Do not attempt to remove an obstruction or blockage with your hands. Keep hands,
feet, and clothing away from all power-driven parts.
• Dispose of all uids in accordance with local laws.

• To avoid personal injury or property damage, use extreme care in handling gasoline. Gaso-
line is extremely ammable and the vapors are explosive.
• Do not refuel machine while smoking or at a location near ames or sparks.
• Always refuel the machine outdoors.
• Do not store machine or fuel container indoors where fumes or fuel can reach an open
ame, spark, or pilot light.
• Only store fuel in an approved container. Keep out of reach of children.
• Never ll containers inside a vehicle or on a truck or trailer bed with a plastic liner. Always place containers
on the ground away from your vehicle before lling.
• Remove machine from the truck or trailer and refuel it on the ground. If this is not possible, refuel the
machine using a portable container, rather than from a fuel dispenser nozzle.
• Never remove fuel cap or add fuel with the engine running. Allow engine to cool before refueling.
• Never remove fuel cap while on a slope. Only remove when parked on a level surface.
• Replace all fuel tank and container caps securely.

SAFETY

General Safety Procedures
for Ventrac Power Units, Attachments, & Accessories
• Do not overll fuel tank. Only ll to bottom of fuel neck, do not ll fuel neck full. Overlling of fuel tank could
result in engine ooding, fuel leakage from the tank, and/or damage to the emissions control system.
• If fuel is spilled, do not attempt to start the engine. Move the power unit away from the fuel spill and
avoid creating any source of ignition until fuel vapors have dissipated.
• If the fuel tank must be drained, it should be drained outdoors into an approved container.
• Dispose of all uids in accordance with local laws.
• Check all fuel lines for tightness and wear on a regular basis. Tighten or repair them as needed.
• The fuel system is equipped with a shut-o󰀨 valve. Shut o󰀨 the fuel when transporting the machine to
and from the job, when parking the machine indoors, or when servicing the fuel system.

• Make sure all hydraulic connections are tight and all hydraulic hoses and tubes are in good condition.
Repair any leaks and replace any damaged or deteriorated hoses or tubes before starting the machine.
• Hydraulic leaks can occur under high pressure. Hydraulic leaks require special care and attention.
• Use a piece of cardboard and a magnifying glass to locate sus-
pected hydraulic leaks.
• Keep body and hands away from pinhole leaks
or nozzles that eject high pressure hydraulic uid.
Hydraulic uid escaping under high pressure can
penetrate the skin causing serious injury, leading to
severe complications and/or secondary infections
if left untreated. If hydraulic uid is injected into the
skin, seek immediate medical attention no matter
how minor the injury appears.
• Hydraulic system may contain stored energy. Before performing maintenance or repairs on the hydraulic
system, remove attachments, engage parking brake, disengage weight transfer system (if equipped), shut
o󰀨 engine, and remove ignition key. To relieve pressure on the auxiliary hydraulic system, shut o󰀨 the power
unit engine and move the secondary S.D.L.A. lever left and right before disconnecting the auxiliary hydraulic
quick couplers.
• Dispose of all uids in accordance with local laws.


SAFETY


• During operation, set up the power unit and stump cutter so that particles are directed away from buildings
or other objects of value.
• During the grinding process, objects can be propelled from the stump grinder causing injury or damage to
people, animals, buildings, vehicles, or other objects of value. Block access to the area prior to grinding
stumps. Use plywood or equivalent shielding to protect nearby buildings or objects. If access to the area
cannot be prevented, use plywood or equivalent shielding to protect pedestrian areas.
• Stop grinding immediately if the cutter head strikes a rock or other solid object. Damage to the cutting teeth
or the cutter head may occur.
• Do not operate with any of the cutting teeth missing. This causes the cutter head to become unbalanced and
may cause damage to the stump grinder.
• Attachment hydraulic system may contain stored energy. Before performing maintenance or repairs on
the hydraulic system, the attachment’s auxiliary hydraulic hoses must be disconnected from the power
unit. Lower the attachment to the ground, shut o󰀨 power unit engine, move the secondary S.D.L.A.
lever left and right to relieve auxiliary hydraulic pressure, and disconnect the auxiliary hydraulic quick
couplers. Block up the stump grinder to remove weight from the multi-function arm to relieve pressure
from the hydraulic system.


GENERAL OPERATION

1.
Always set the parking brake, shut o󰀨 power
unit engine, remove the ignition key, and ensure
all moving parts have come to a complete stop
before inspecting components, or attempting
any repair or adjustment.
Park machine on a level surface, with the engine
shut o󰀨 and all uids cold.
2. Perform a visual inspection of both the power
unit and the stump grinder. Look for loose or
missing hardware, damaged components, or
signs of wear.
3. Inspect hydraulic hoses, hydraulic ttings, and
fuel lines to ensure tight, leak free connections.
4. Inspect the drive belts. Belts should be in good
condition. Service as required.
5. Inspect the cutting teeth for wear and service as
required.
6. Refer to the power unit operator’s manual.
Check the power unit’s engine oil, hydraulic oil,
cooling system, tire pressure, and fuel level. Add
uid or service as required.
7. Test the power unit’s operator safety interlock
system*.

1. Drive the power unit slowly forward into the hitch
arms of the stump grinder. Align the lift arms of
the power unit with the stump grinder hitch arms
by raising or lowering the front hitch and complete
the engagement.
2. Once completely engaged, close the front hitch
locking lever.*
3. Engage the parking brake* and shut o󰀨 the engine.
4. Place the attachment belt onto the PTO drive
pulley on the power unit.
5. Pull the belt tension spring back under the cross
tube and hook inside the tab on the left hitch arm.
6. Ensure the drive belt is properly located in the
pulley grooves before attempting to operate.
7. Wipe hose ends clean, and connect to the
power unit’s hydraulic quick couplers. If
equipped, connect the hoses and quick couplers
so the red indicators are paired together and the
yellow indicators are paired together.

1. Park the power unit on a level surface and set
the parking brake.*
2. Lower the stump grinder to the ground.
3. Lower the multi-function arm to the ground (refer-
ence detaching point on depth indicator decal).
4. Shut o󰀨 power unit engine.
5. Slowly release the belt tension spring from the
hitch arm tab.
6. Remove the attachment belt from the PTO drive
pulley of the power unit.
7. Disconnect the hydraulic quick couplers from the
power unit and loop the hoses over the main
frame. Do not allow hose ends to lay in the dirt.
8. Disengage the front hitch locking lever.*
(LT3000 only: rotate the hitch latch (A) down to
allow the front hitch locking lever to be released.)
9.
A
Restart power unit and slowly back away from
the stump grinder. A side to side movement of
the steering wheel may aid in disengagement.
* Refer to power unit operator’s manual for operation of
power unit controls.

GENERAL OPERATION


WARNING
During the grinding process, objects can be
propelled from the stump grinder causing injury or
damage to people, animals, buildings, vehicles,
or other objects of value. Block access to the
area prior to grinding stumps. Use plywood or
equivalent shielding to protect nearby building
or objects. If access to the area cannot be
prevented, use plywood or equivalent shielding to
protect pedestrian areas.
CAUTION
Do not grind in a position that allows the teeth to
be in continuous contact with a rock.
WARNING
After 30 minutes of run time from initial startup or
anytime the cutter teeth bolts have been loosened,
stop the stump grinder and torque the cutter teeth
bolts to 35 ft-lbs (47 Nm).
Before grinding, cut the stump as low to the ground
as possible with a chain saw (maximum recom-
mended height is 3” (7.6 cm) above ground level).
Move the stump grinder into position above the clos-
est edge of the stump.
With the power unit engine running between 2,000
and 2,500 RPM, engage the PTO switch. Adjust the
throttle to the desired engine RPM.
Slowly lower the stump grinder until it begins to cut.
Turn the power unit’s steering wheel left and right to
sweep the cutter head across the stump. After each
pass, lower the grinder a little more and repeat the
process. If the grinder is lowered to much at one
time, it will not allow the power unit to be steered. Lift
the grinder slightly to continue side-to-side grinding.
After removing several inches on larger stumps, it is
necessary to drive forward and repeat the process.
Also on larger stumps, it is advisable to approach
from several di󰀨erent angles, if possible.
Follow this procedure until the stump is cut to the
desired depth below the ground surface.
Note that there are variables in stumps. Hardwoods
cut much slower than softwoods. Partially decayed
stumps may cut easy in some spots, but still have
some hard spots or tough roots.
If a common grinding depth is desired when remov-
ing multiple stumps, grind the rst stump to the
desired depth. With the cutter wheel resting on the
stump, lower the multi-function arm until it contacts
the ground. Note the location of the indicator rod on
the depth indicator decal (the decal is for reference
only and does not indicate actual grinding depth).
The multi-function arm can be set at the selected
level from the rst stump while grinding the rest of
the stumps. When the stump is ground down to the
correct depth, the arm will prevent further cutting.
After a stump has been removed, raise the stump
grinder to its highest position and lower the multi-
function arm until it contacts the ground. Use the
multi-function arm to push the debris back into the
hole that remains from removing the stump.




For best results, and to maintain the nish of the
stump grinder, clean or wash the stump grinder
after each use to remove wood shavings, dirt, and
other debris.

Inspecting the drive belts of the stump grinder can
prevent sudden belt failure by nding problems
before they cause a belt to break.
Typical wear
on a drive
belt may
result in the
conditions
shown in the
diagram. If
any of these
conditions
occur, the drive belt will require replacement.

1. Remove the belt drive shield.
2. Release the drive belt tension spring.
3. Remove the old rotor drive belts and install new
drive belts onto the pulleys.
4. Engage the drive belt tension spring.
5. Reinstall the belt drive shield.

1.
CAUTION
The cutter head is equipped with 4) right cutters,
4) left cutters, and 4) straight cutters. It is impor-
tant that the cutters are installed in the correct
positions. It is recommended that the cutter teeth
be replaced one at a time to ensure they are
installed in the correct positions.
Loosen the 4) clamping bolts (A) that hold the
cutter tooth in the cutter head. The bolts do not
need to be removed, only loosened.
2.
B
A
Use a locking pliers to pull the cutter tooth out
of the cutter head. If the old cutter tooth will be
discarded, it is permissible to tap the cutter teeth
out with a steel hammer. If the cutter teeth will
be reused, use only a rubber mallet or soft-faced
hammer to help remove teeth to avoid damaging
the carbide tip.
3. Insert a 3/8” bolt or pin into the gauge hole (B) in
the cutter head.
4. Slide the new cutter tooth into the cutter head
until it contacts the bolt or pin. If necessary, use
a rubber mallet or soft-faced hammer to tap the
tooth into place.
5. Tighten the 4) tooth clamping bolts to 35 ft-lbs
(47 Nm) and remove the bolt or pin that was
used as a stop.
6. Move to the next tooth and continue working
around the cutter head until all the teeth have
been replaced.
WARNING
After replacing cutter teeth, stop the stump grinder
after 30 minutes of run time and torque the cutter
teeth bolts to 35 ft-lbs (47 Nm).
Always set the parking brake, shut o󰀨 power
unit engine, remove the ignition key, and ensure
all moving parts have come to a complete stop
before inspecting components or attempting any
repair or adjustment.

If any component requires replacement, use only
original Ventrac replacement parts.

SERVICE


Lubrication is required at the following locations
using a lithium complex NLGI #2 grease. Refer to
the maintenance schedule for service intervals and
amount of grease.

Gearbox oil level should be maintained at approxi-
mately half full when the gearbox is in a level posi-
tion. Add 80-90 weight gear oil as necessary. Refer
to the maintenance schedule for service intervals.


1. Clean or wash the stump grinder to remove dirt,
wood shavings, and other debris.
2. Inspect for loose or missing hardware, damaged
components, or signs of wear. Repair or replace
any damaged or worn components.
3. Inspect safety decals. Replace any decals that
are faded, illegible, or missing.
4. Inspect hydraulic hoses and ttings to ensure
tight, leak free connections. Repair or replace
any damaged or worn components.
5. Inspect belts for signs of damage or wear and
replace as required.
6. Inspect cutting teeth for wear and replace if
necessary.
7. Service all lubrication points and inspect gear-
box oil level.
8. Wipe o󰀨 excess grease or oil.

Inspect, clean, and prepare the stump grinder for
use.

SERVICE




#ofLocations
#ofPumps
Daily
At50Hours
At100Hours
At150Hours
At200Hours
At250Hours
At300Hours
At350Hours
At400Hours
At450Hours
At500Hours
At550Hours
At600Hours
At650Hours
At700Hours
At750Hours
At800Hours
At850Hours
At900Hours
At950Hours
At1000Hours
Yearly
Rotor (Cutter Head) Bearing                     
Cylinder End 2^                    
                   
  



Inspect Safety Decals 
^ Grease until fresh grease is visible.
Inspect for Loose, Missing, or Worn
Components.
Inspect Belts, Hydraulic Hoses, & Fittings
Inspect Cutting Teeth for Wear or Damage
Grease & Lubrication: See Lubrication Section
Inspection
Check Gearbox Oil Level
Change Gearbox Oil. Replace w/ 80-90
Weight Synthetic Gear Oil



#ofLocations
#ofPumps
Daily
At50Hours
At100Hours
At150Hours
At200Hours
At250Hours
At300Hours
At350Hours
At400Hours
At450Hours
At500Hours
At550Hours
At600Hours
At650Hours
At700Hours
At750Hours
At800Hours
At850Hours
At900Hours
At950Hours
At1000Hours
Yearly
Rotor (Cutter Head) Bearing 
Cylinder End 2^
Inspect Safety Decals
^ Grease until fresh grease is visible.
Inspect for Loose, Missing, or Worn
Components.
Inspect Belts, Hydraulic Hoses, & Fittings
Inspect Cutting Teeth for Wear or Damage
Grease & Lubrication: See Lubrication Section
Inspection
Check Gearbox Oil Level
Change Gearbox Oil. Replace w/ 80-90
Weight Synthetic Gear Oil




Overall Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-1/2 inches (49.5 cm)
Overall Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 inches (101.5 cm)
Overall Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-1/4 inches (56.5 cm)
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 pounds (90.7 kg)
Rotor Tip Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2,150 ft/min (650 m/min)
Rotor RPM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 570 RPM
Cutter Wheel Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . 14-3/8 inches (36.5 cm)
Grinding Depth (below ground) . . . . . . . . . . . . . . . . . . . . . . . . 6 inches (15.25 cm)
Cutter Teeth, Carbide Tipped . . . . . . . . . . . . . . . . . . 4 Left, 4 Right, & 4 Straight Teeth

Excellent operator visibility
Replaceable carbide hardened cutting teeth
Hydraulically controlled multi-function arm which performs three functions;
1. A storage stand for which holds the stump grinder for reattachment
2. A depth gauge to preset the desired depth of cut
3. A blade for pushing debris back into the hole

 Use only original Ventrac
replacement parts.


