Skid Pro QASA530 User manual
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QASA530 Tree Saw
Operators Manual
Skid Pro Attachments
PO Box 982
Alexandria, MN 56308
www.skidpro.com
December 2023
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Following is a list of videos and documents available to help and enhance maintaining the tree saw.
Contact Product Guru to access correct link.
The list below was current at the time this manual was issued. Additional content may be available.
Activity Name Description
Skidsteer Case Drain Back-Pressure Causes of Skidsteer Case Drain Back-Pressure.
Skidsteer Case Drain Back-Pressure Testing Case Drain Back-Pressure With Open Coupler.
Skidsteer Case Drain Back-Pressure Testing Case Drain Back-Pressure With Pressure Gauge.
Hydraulic Motor Breaking In Replacement Hydraulic Motor.
Remove Seal Remove Seal On Motor Or Load Adapter.
Zero-Leak Relief Valve Demonstrating And Troubleshooting Zero-Leak.
Replace motor shaft seal Replace Shaft Seal On Piston Motor.
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........................................................................................4
1.1 Introduction................................................................................................................4
.....................................................................................................................4
.............................................................................................5
...............................................................................................................................6
...................................................................6
3.2 Operational Hazards..................................................................................................6
..............................................................................7
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.................................................................................8
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3.3 Maintenance Hazards................................................................................................9
.......................................................................9
............................................................................................10
....................................................................................................................12
4.1 Hydraulics .................................................................................................................12
.................................................................................................12
.......................................................................................................................13
5.1 Pre-Operation Check List .......................................................................................13
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...........................................................................................13
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5.5 Pressure Relief Adjustment....................................................................................15
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6.1 ............................................................................................................16
6.2 Inspections................................................................................................................16
...............................................................................................17
.............................................................................................17
6.5 Motor Shaft Seal ......................................................................................................18
6.6 Zero Leak Case Drain Relief Valve.........................................................................18
..........................................................................................................19
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Congratulations on your purchase of a Skid Pro Skid
Tree Saw. This equipment has been designed and
manufactured to meet the needs of a discriminating
buyer for ecient clearing of brush, shrubs and trees.
The blade is hydraulic powered by the hydraulic system
on your skid steer.
Replaceable bearings are provided at major pivot
points for extended service life.
Safe, ecient and trouble free operation of your
tree saw requires that you and anyone else who will
be operating or maintaining the tree saw read and
understand this Operator’s Manual.
This manual covers the QASA530 Skid Pro Tree Saw.
Keep this manual with the equipment for frequent
reference and to pass on to new operators or owners.
Call your Skid Pro dealer, distributor or the factory if
you need assistance, information or additional copies
of the manuals.
OPERATOR ORIENTATION - The directions left, right,
front and rear, as mentioned throughout this manual,
are as seen from the skid steer driver’s seat and facing
in the direction of travel.
Skid Pro warrants products purchased from Skid Pro
to the Original Purchaser to be free from defects in
material and workmanship for a period of twelve (12)
months from the warranty start date.
Skid Pro’s requirement for any issue with respect to
attachments shall be limited to repairing or replacing
the defective part, as this is a parts-only warranty and
does not include any labor to replace or install the
part or downtime from resulting issue. Skid Pro has
full technical support & assistance to assure customer
replaces the part properly for optimal performance
on attachment. Skid Pro warranty service does not
include:
1. Transportation to selling dealer’s business location
or, at the option of the original retail purchaser, the
cost of a service call.
2. Used equipment.
3. Components covered by their own non-Skid Pro
warranties
4. Normal maintenance service and expendable wear
out items.
5. Repairs or adjustments caused by improper use;
failure to follow recommended maintenance
procedures; accidents or other casualty.
6. Liability for incidental or consequential damages of
any type, including but not limited to lost prots of
expenses of acquiring replacement equipment.
No agent, employee or representative of Skid Pro has
authority to bind Skid Pro to any warranty except as
specically set fourth herein. Any of these limitations
excluded by local law shall be deemed deleted from
this warranty; all other terms will continue to apply.
Skid Pro, Inc.
Toll Free: 877.378.4642
E-mail: [email protected]
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A. Blade
B. Cutting Teeth
C. Hydraulic Motor
D. Angled Push Bar
E. Protective Mesh
F. Operators Manual Tube
G. Quick Attach
H. Hydraulic Hose Holder
I. Blade Guard
J. Lifting Eye
K. Front Push Bar
L. Cutting Head Rotation Motor
M. Zero Leak Relief Valve
A
C
E
B
D
F
G
H
I
M
D
H
J
K
L
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You must read, understand and follow the instructions
given by the operating unit manufacturers, as well as
the instructions in this manual.
The safety information in this manual is denoted by the
safety alert symbol:
^
This symbol means ATTENTION! BECOME ALERT!
YOUR SAFETY IS INVOLVED!
The level of risk is indicated by the following signal
words:
^^
or serious injury.
^
result in death or serious injury.
^
or moderate injury.
NOTICE - Indicates a situation that could
result in damage to the equipment or other
property.
^
Prevent serious injury or death.
Read and understand this manual before
leaving operators seat.
operation.
^
Prevent serious injury or death from
moving parts.
Moving parts can crush and dismember.
in place.
before adjusting or performing
maintenance.
^
applications.
Any other use may result in personal
^
Prevent serious injury or death.
before operation or transport.
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^
^
Prevent serious injury or death.
It is recommended that the operating
protect the operator.
Carefully read all safety messages in this manual and
on equipment safety signs. Keep safety signs in good
condition and replace missing or damaged safety
signs.
New equipment components and repair parts must
include the current safety decal.
Learn how to properly operate equipment. NEVER
operate or work around this equipment without proper
instruction, while fatigued or under the inuence of
alcohol, prescription or non-prescription medication or
if feeling ill.
Keep your equipment in proper working condition.
Know the regulations and laws that apply to you and your
industry. This manual is not to replace any regulations
or laws. Additional information may be found at:
www.asae.org or www.osha.gov.
If you do not understand any part of this manual,
contact Skid Pro at 866-232-8224.
Be prepared in case of emergencies. Keep a re
extinguisher and rst aid kit close to the machine.
Keep emergency phone numbers close to your phone.
Know your address so emergency services can locate
you if an emergency arises.
Replace missing or damaged safety signs.
Safety sign location are identied in Section 3.5 of this
manual.
Replacement safety signs are available from your
dealer.
NEVER lift or carry anyone on Tree Saw.
NEVER use Tree Saw as a work platform.
NEVER allow passengers on Tree Saw.
Keep Tree Saw low and move at slow speeds on rough
or uneven terrain.
The equipment may rollover, resulting in death or
serious injury. To help prevent rollover:
• Travel at a slow speed.
• Avoid sharp turns & sudden movement on slopes.
• Carry tree saw close to the ground.
• Avoid holes, ditches and other obstructions which
may cause equipment to rollover.
• Use caution when operating on slopes and do not
operate on excessively steep slopes.
• Do not exceed load capacity of equipment.
^
Prolonged exposure to loud noise can
cause impairment or loss of hearing.
against objectionable or uncomfortable
loud noises.
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^^
Prevent electrocution.
Death or serious injury can result if
lines.
contact.
Check clearance before raising equipment.
Have local utilities locate and mark under ground wires,
cables, pipelines and other hazards before digging.
DO NOT leave the operator’s seat if any part of the
equipment contacts electric lines or cables.
Detach Tree Saw on a rm and level surface. Tree Saw
may fall over if detached on unlevel or soft surface. Be
sure people, livestock and pets are clear of machinery.
Relieve hydraulic pressure before disconnecting
hydraulic hoses. See your skid steer Operator’s
Manual.
^
blade, be sure to disengage hydraulics
Verify all reectors and Slow Moving Vehicle (SMV)
sign are visible.
Raise tree saw slightly o ground.
Verify hydraulics are disengaged.
Travel at a reasonable and safe speed.
^
Crushing hazard.
resulting in death or serious injury.
A raised Tree Saw can lower unexpectedly, resulting in
death or serious injury.
NEVER enter area under a raised Tree Saw.
Lower Tree Saw to ground, engage parking brake, shut
o engine and remove key before servicing.
^
Hydraulic hoses can fail from age, damage
and exposure.
searching for leaks. A tiny, almost invisible
leak can penetrate the skin, thereby
leaks, never use your hands.
Escaping uid under pressure can penetrate the skin
causing serious injury.
Prevent the hazard by relieving pressure (See skid
steer Operator’s Manual.) before connecting or
disconnecting hydraulic lines. Verify all connections
are tight before applying pressure. Search for leaks
with a piece of cardboard or wood.
Protect hands and body from high pressure uids. If
an accident occurs, see a doctor immediately. Any uid
injected into the skin must be surgically removed within
a few hours or serious infection may result.
Doctors unfamiliar with this type of injury should
reference a knowledgeable medical source.
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Before servicing, park machine on a rm and level
surface, set parking brake, chock wheels, and place
a “Do Not Operate” tag on control panel. Read and
understand this manual. If you do not understand any
part of the manual, contact Skid Pro at 866-232-8224.
Always wear face and/or eye protection, safety shoes,
and other protective equipment appropriate for the job.
Do not make unauthorized modications. Contact Skid
Pro at 866-232-8224 before you weld, cut/drill holes,
or make any other modications.
Always use Skid Pro replacement parts.
^
Crushing hazard.
•
•
•
• Place “Do Not Operate” tag on control
panel.
^
Moving parts can crush and cut.
Keep clear of moving components.
performing maintenance.
^
Keep clear of moving components.
appropriate for the job.
^
Hot and high pressure hydraulic oil.
^
California to cause cancer.
mask or other safeguards for personal
^
Do not make any alterations to your tree saw. Altering
may cause your equipment to be unsafe and may void
the manufacturers’ warranty.
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^
If any of these labels are missing or
cannot be read, contact your dealer for
replacement labels.
A
C
D
E
B
A
F
C
B
Decal A - MTB-177
Decal B - MTB-176
Never allow riders; especially children
on carrier or cutter.
cutting
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Decal C - MTB-065
MTB-065
Decal D - MTB-182
Decal E - D005262
WARNING: This product can expose you to chemicals
including 1,3-Butadiene and lead, which are known to the state of
California to cause cancer and birth defects or other reproductive
harm. For more information go to www.P65Warnings.ca.gov.
D005262
Decal F - MTB-175
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^^
hydraulic hoses.
The tree saw is equipped with three hoses, pressure,
return and case drain. Hydraulic couplers are not
provided with the tree saw. You must install couplers
and connect your skidsteer pressure, return and case
drain hoses to the tree saw hoses. Install your couplers
to the hoses listed in the table below.
Fitting Size Hose Description Qty.
3/4 JIC FM Pressure & Return 2
3/8 JIC FM Case Drain 1
Identify the pressure port hose and connect your hoses
to the tree saw hoses.
Maximum allowable case pressure is 100 psi, case
drain is required.
• First, operate all functions in a clear area with
throttle at low idle to get a good feel for the controls
before you actually move into any brush.
• Slow cutting speed if pressure surges up close
to max psi, doing this will greatly reduce blade
stoppage.
• Run throttle only at half speed for rst time users.
• Move the tree saw slowly until you have a better
feel how much the unit can take.
• The machine is equipped with a front push bar and
an angled push bar to push brush or small trees
over. This will allow the tree saw teeth to contact
the lower portion of the brush and the blade to cut
it o.
• For tall brush, you can use the angled push bar to
push the brush over and cut it o close to ground.
Each operator must experiment to nd a technique
that works for them in their application.
^^
disengage hydraulic drive before getting
^
California to cause cancer.
mask or other safeguards for personal
^
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^ Keep bystanders, livestock, pets, etc away from
equipment while in use.
^ Always wear face or eye protection, safety shoes,
and other protective equipment appropriate for
the job.
^ Do not operate, work on or around this machine
while under the inuence of alcohol, drugs or if
feeling ill.
^Keep clear of moving machinery at all times.
^Stop skid steer engine before leaving operators
area.
^It is your responsibility to operate this equipment
safely. You must be familiar with the equipment
and all safety practices before use.
^ Do not allow untrained or unqualied people to
operate this equipment.
It is operators responsibility to perform the following
checks prior to operation of equipment.
Review and understand this manual and operating unit
manual.
Verify safety decals are installed and legible. Replace
if damaged or missing.
Verify that tree saw is properly attached to skid steer.
Check for entangled material on blade.
Inspect hoses and ttings for wear, damage and leaks
and are properly connected. Replace damaged or
leaking hoses before use.
Verify that all hardware is tight. Verify all guards, doors
and covers are installed and secured.
Verify cutting teeth are in good condition and are tight.
Verify that local utilities have marked all underground
wires, cables and pipelines.
Refer to operating unit operator’s manual for prestarting
instructions.
^
transmission in park.
Only experienced and properly trained
operator’s should operate the skid steer
Attach:
1. Read and follow all safety instructions.
2. Attach tree saw to skid steer. See skid steer
Operator’s Manual.
3. Verify pins are secure in the correct position.
4. Connect hydraulic hoses. Verify hydraulic hoses
are clear of pinch areas and moving parts.
5. Move to a clear open area to test functions.
Detach:
1. Park on a rm, level surface.
2. Engage parking brake. Lower tree saw to the
ground.
3. Shut o engine and remove key.
4. Disconnect hydraulic hoses.
5. Detach tree saw from skid steer. See skid steer
Operator’s Manual.
During the rst few hours of use, avoid hitting stones
as much as possible to allow the carbide teeth to wear
slightly. This can be done by keeping the cutting wheel
above ground level. Brand new carbide tips are razor
sharp and can chip and shatter easily when they hit
hard objects. Once the razor sharpness has worn
away, the tips do not chip as easily. Observing these
precautions will extend the life of the carbide teeth and
reduce operating expenses.
The teeth bolts must be retightened every ten minutes
for the rst hour of use on a new tree saw.
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Operate all functions in an open area with skid steer in
idle to get a good feel for the controls.
^
Prevent serious injury or death.
1.
2.
3. Disconnect hydraulic drive.
4.
^
Prevent serious injury or death.
are in the vicinity.
cutting area.
Keep all shields in place.
^
California to cause cancer.
mask or other safeguards for personal
^
1. Attach tree saw to skid steer. See Attach and
Detach Tree Saw.
^
Prevent serious injury or death.
forestry guard to protect the operator.
2. Set engine speed to low idle and engage hydraulics.
3. Slowly increase engine speed to high idle. Verify
tree saw is operating smoothly.
4. Rotate cutting head as needed to obtain the closest
cut to trunk or ground.
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5. Operate hydraulics to move tree saw blade into
brush, shrubs or tree.
6. If blade stalls, stop movement, slightly raise
tree saw and allow blade to regain speed. Slow
movement to prevent further stalling.
^
Moving parts can crush and cut.
Keep clear of moving components.
Lockout operating unit before clearing
jams.
^
come to a complete stop.
7. When cutting is completed, disengage hydraulics
and allow blade to stop.
8. Lower tree saw to ground and stop skid steer
engine.
^
Prevent serious injury or death caused by
unexpected movement.
1.
2.
3.
4.
1. Park on a level surface.
2. Lower tree saw to the ground.
3. Engage parking brake, shut o engine and remove
key.
(A) Flow Adjust - Adjusting the ow determines how
much oil is sent to cylinders and blade. The more oil
that is sent to the blade will result in cylinders moving
slower. If more oil is sent to the cylinders, blade speed
will decrease. Typical adjustment is 1/2 turn out from
closed position. To adjust, hold hex screw with hex
wrench and loosen lock nut. Turn hex screw and hold
in position while tightening lock nut. Test operation and
adjust again if desired.
(B) Pressure relief must be set lower than machine
relief. 1/4 turn out from closed position is approximately
3000 psi (207 bar). To adjust, hold hex screw with
hex wrench and loosen lock nut. Turn hex screw in to
increase pressure, or out to decrease pressure. Turn
hex screw in 1/4 turn increments until desired pressure
is achieved. Hold hex screw in position while tightening
lock nut.
Image is shown with top cover removed for adjustments.
Do not operate with top cover removed.
A
B
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Maintenance Chart
General Inspection Inspect the unit for any buildup of contamination (dirt, stones,
etc.).
Daily.
Hydraulic Hoses Inspect hydraulic hoses for damage and wear. Daily.
Cutting Teeth The teeth bolts must be retightened every ten minutes for the
rst hour of use on a new tree saw.
First hour of use.
Cutting Teeth Check and replace one at a time as necessary. With daily use
expect to replace 4 to 6 teeth per day. See Replace Cutting
Teeth in this section.
Every 4 hours.
^
Prevent serious injury or death.
1.
2.
3. Disconnect hydraulic drive.
4.
^
California to cause cancer.
mask or other safeguards for personal
^
Inspect the unit for any buildup of contamination (dirt,
stones, etc.).
Check cutting teeth every 4 hours of use. Replace
cutting teeth as needed. Unit will cut faster and
remaining teeth will last longer if broken teeth are
replaced.
Inspect hydraulic hoses for damage and wear. Models
with rotating head may experience premature hose
wear in the areas (A) where hoses go through the
slotted frame. Replace worn or damaged hoses.
Skid Pro has included one replacement set of internal
motor hoses with the tree saw. These hoses were
placed inside the body of the tree saw.
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Each tooth can be rotated up to two times from its
original position before replacement is necessary.
1. Park tree saw on a level surface.
2. Lower blade to the ground.
3. Shut o engine and lockout engine controls.
4. Inspect teeth for wear on top edge. Once top
edge is worn, rotate tooth so a new edge is on top
(cutting) edge.
5. Loosen locknut (A) on tooth (B) and rotate tooth
1/3 turn. Flat shoulder on tooth will t against
shoulder (C) on tooth holder.
6. Tighten locknut (A) to 65 lb/
ft (88 Nm) of torque.
A B
C
Note: Parts breakdown can be found on Skid Pro’s
website. www.skidpro.com
1. Park tree saw on a level surface.
2. Lower blade to the ground.
3. Shut o engine and lockout engine controls.
4. Inspect cutting teeth (B) for damage and wear.
Replace individual teeth as needed.
5. Remove locknut (A) and tooth (B). Install new tooth.
Flat shoulder on tooth will t against shoulder (C)
on tooth holder.
6. Install locknut. Tighten locknut (A) to 65 lb/ft (88
Nm) of torque.
AB
C
Note: Parts breakdown can be found on Skid Pro's
website. www.skidpro.com
^
Moving parts can crush and cut.
Keep clear of moving components.
Lockout operating unit before performing
maintenance.
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To prevent hydraulic motor damage, the motor shaft
seal is designed to fail if case pressure exceeds 100
psi (689 kPa).
If motor shaft seal (A) has failed, verify case drain line
is free ow to sump or reservoir. Also check drain line
for blockage. Correct any problems before replacing
shaft seal.
A
Order replacement seal kit from Skid Pro and follow
instructions provided with kit.
Motor Shaft Seal Replacement manual can be found at
www.skidpro.com
Note: Parts breakdown can be found on Skid Pro's
website. www.skidpro.com
6.6 Zero Leak Case Drain Relief Valve
The tree saw is equipped with a case drain line that is
to be routed to the excavator hydraulic reservoir.
It is normal for a hydraulic motor to have a slight amount
of internal leakage.
The case drain line will allow this internal leakage to
be returned to the reservoir, preventing excessive
pressure on the motor seal.
Starting with model year 2022, tree saws will be
equipped with a zero leak relief valve (A) installed in
the case drain line.
If the case drain line is not connected or becomes
obstructed, the zero leak relief valve will vent the
pressurized hydraulic uid to the atmosphere.
The zero leak relief valve will self reset after hydraulic
pressure reduced.
immediately.
A properly installed case drain protected by a zero leak
relief valve will save the work of replacing the motor
shaft seal and also improve the eciency of your
hydraulic system.
A
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Blade does not spin. Blade jammed. Remove material from blade.
Low oil level. Check oil level. Add if necessary.
Low oil ow. Check ow control on skidsteer. See
your dealer.
Low pressure. Check valve open.
Blade rotates slow or sluggish. Low oil. Check oil level. Add if necessary.
Oil lter plugged. Replace skidsteer oil lter.
Relief valve not set properly. Set relief pressure to motor
specication.
Low oil ow. Set relief pressure to motor
specication.
Excessive vibration. Cutting teeth worn or missing. Replace worn, broken or missing teeth.
Debris lodged in blade. Remove debris.
Rotating cutting head moves slow
or stutters when fully rotated.
On-board pressure relief valve
is set higher than machine relief
valve.
Adjust on-board relief valve to a lower
pressure setting than machine relief
valve. See Section 5.5 Pressure Relief
Adjustment.
Low cutting power. Check to see if blade can be
turn backward with hoses
disconnected.
If blade can be
turned, anti-cavitation
valve (A) may be
stuck open.
Remove and clean
anti-cavitation valve.
Low ow or pressure. Check hydraulic pump ow and pressure
Disconnect pressure line to saw and
install a pressure gauge in line. Test
pressure. Contact your dealer if pressure
is low.
Check blade speed with a photo
tachometer.
Contact your dealer for recommended
blade speed based on the motor and
machine GPM.
Hydraulic uid coming out of zero
leak relief valve.
Case drain connector for
proper connection and line for
obstructions or pinched line.
Connect case drain line if not connected.
Replace line if damage, obstructed or
pinched.
Combo coupler seals. Combo coupler seals may be leaking,
allowing pressurized uid to escape to
the case drain line.
A
20 www.skidpro.com
Skid Pro Attachments
PO Box 982
Alexandria, MN 56308
www.skidpro.com
December 2023
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