WARNING
!
T
o re
duce th
e risk of injury, all ope
r
ators and maintenance personnel must read and understand these
instructions before operating, changing accessories, or performing maintenance on this power
equipment. All possible situations cannot be covered in these instructions. Care must be
exercised by everyone using, maintaining, or working near this equipment.
Operation and Instruction Manual
MODEL: TSCAR-8H
GAS CONCRETE SCARIFIER
(Honda Gasoline Engine)
Contents of TSCAR-8H Manual
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3
3
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4
4
5
5
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6
7
7
8
Safety Instructions
Assembly
Product Assembly
Stop Switch
Edger Installation
Edger Removal
Cutter Cage Removal and Cutter
Change Starting Procedures
Stopping the Engine
Maintenance
Bearing Replacement Procedures
Troubleshooting Guide
Specifications
Transportation
Warranty
Maintenance Record
8
2
Safety Instructions
A. Only authorized, experienced or properly trained individuals should operate this equipment.
B. Operating personnel should be equipped with proper safety protection.
C. Rotating and moving parts will cause injury if contacted. Ensure guards and safety devices are in
place before this machine is operated. Make sure engine is shut down and spark plug is
disconnected before servicing your SURFACE PREPAPATION UNIT. Never leave a machine
unattended when it is running.
D. Be careful to avoid contact with the muffler when the engine is hot as it may cause severe burns.
E. When using a DUST CONTROL UNIT avoid hose contact with the TSCAR-8H muffler as the muffler
may burn a hole in the hose.
F. Do not operate the machine in an explosive atmosphere, near combustible materials or where gas
fumes may not be properly dispersed. Repair any fuel leaks. Remove accumulated dust frequently
from air filter system.
G. Do not run the air motor without sufficient oil in the lubricating system. Lubricant levels should be
checked regularly on gas and air powered units. Refer to manufacturer’s manual for amounts.
H. Before starting your unit, always raise the cutter cage assembly using the hand knob adjustment, so
that the cutters do not contact the surface.
Assembly
Your SURFACE PREPARATION UNIT has been shipped partially assembled with the exception of
the handle assembly. The gas powered units require only filling with fuel and a brief check of lubricant
levels in preparation for operation. Engine crankcase is not pre-serviced with oil at factory; levels
should be checked.
Handle Assembly
A. To attach the handle, first remove the pin from the handle assembly. Align the lift plate and re-insert
the top pin. Place flat washer on pin. Insert spring clip through hole in pin. Feed threaded bolt end of
cable through hole on lift plates.
B. Tighten cable by attaching nut.
C. Remove the four bolts and lockwashers from the machine housing. Match up the holes on the handle
assembly and the machine housing and insert the bolts and the washers. Tighten bolts corner to
corner. Before final tightening, place the machine on a flat surface to ensure that all wheels contact
the surface.
3
Stop Switch
On gas powered models feed the attached stop wire under the bridge and through the circular hole on
the machine housing, from below the engine, up to attached terminal on the engine. Secure it to terminal
by clamping with a pair of pliers.
Edger Installation
1. Make sure that the power source is disconnected; disconnect spark plug and turn off fuel supply on
gas unit.
2. Tilt machine onto handle (if your unit is equipped with a Honda GX engine, unit must be tilted forward
or cylinders will be flooded with oil).
3. Remove cutter cage and retainer shaft (see cutter cage removal).
4. Facing underside of machine, slide dummy shaft through outboard bearing on left side (if engine is a
Honda GX this will be on the right side of the housing).
5. Slide retainer shaft through edger cage. The roll pin in the shaft head should fit into the slot on the
end plate of the cage.
6. Slide retainer shaft through the outboard bearing and the dummy shaft.
7. Using socket or wrench tighten the retainer shaft by turning counter clockwise.
8. Install edger housing using the three bolts supplied.
9. Note: Edger operation is not to be performed with main TSCAR-8H cage in place.
Edger Removal
1. Make sure the power source is disconnected; disconnect spark plug and turn off fuel supply on gas
unit.
2. Tilt machine onto handle (if your unit is equipped with a Honda GX engine, unit must be tilted forward
or cylinders will be flooded with oil).
3. Using a 15/16” socket or wrench, turn head of shaft clockwise to loosen.
4. While turning the shaft outwards, cage will move towards the outer edge as well. Free cage from
locking pins on shaft by pushing cage back towards main housing. Turn shaft out and remove.
4
Cutter Cage Removal and Cutter Change
A. To remove the cutter cage from the machine:
1. Make sure that the power source is disconnected. With gas models turn off fuel supply to engine and
disconnect spark plug.
2. Tilt machine onto the handle. (If your unit is equipped with a Honda GX engine, unit must be tilted
forward to change cutter or cylinders will be flooded with oil. This will prevent starting).
3. Facing the underside of the machine housing place a bar between the cutter rods to jam cage.
4. Insert a drift pin into the hole on the main shaft and pull towards you until loose (if equipped with a
Honda GX engine, drift pin will be pushed away from you to loosen main shaft). Remove drift pin and
turn shaft out by hand. Remove shaft.
Changing Cutters/Shafts
Once the cage has been removed use Allen Key and open end wrench, remove screws from cover plate
and remove from cage. With drift pin, tap rods (or, if changing cutters on edger cage) from the drive side
until free of cage. Replace cutters or shafts as required. Replace cover plate. To re-install cutter cage in
machine, reverse procedure for removal. Ensure that shaft is tight.
Removing cage for Hand Held Models
Remove thumbscrews from cover plate, remove cover. Using chuck wrench insert in slot of matching
spline of drive unit to hold cage assembly. Insert pin wrench in matching holes of cage assembly.
Holding both wrenches at the same time, turn pin wrench counter clockwise until cage is free.
Changing Cutters-Hand-Held Unit
Remove cage shaft plate by removing screws. Using drift pin, tap out rods until free of cage. Replace
cutters or shafts as required. Reposition rods and cover plate and re-install cage in unit by reversing
procedure for removal.
Starting Procedure
Gas Operated
Important: Set the machine in an upright position and adjust the cutter cage to maximum height by
turning the height adjustment knob to its farthest position. (This will ensure clearance for the rotating
cage).
Open the fuel valve on gas tank. Place throttle lever at fast idle position. Set the choke to closed position.
Start engine, open choke to prevent flooding. Move throttle control to open or run position when engine is
warmed up. Increase throttle control to maximum operating position (3600r.p.m.), close choke. Stop
engine after two (2) minutes. Re-start engine.
5
To Stop Engines
With machine in upright position, adjust the cutter cage to maximum height by turning the height
adjustment knob to its farthest position. (This ensures clearance for the rotating cage).
GAS UNIT- Stop engine by
depressing kill switch button located at top of handle.
Maintenance
The machine is generally run in very dusty conditions. Engine life will be extended by maintaining a
clean engine and using a DUST CONTROL UNIT or SHOP-VAC. Keep the air filter clean at all times.
Wash the element in a non-oil based solvent. Squeeze out any residue and allow filter to dry before
re-installing in the air cleaner.
Lubrication: Use proper engine oil as recommended by manufacturer. Deep engine oil clean, change
as required. Maintain crankcase levels as recommended in engine manual.
Spark plug: Check and clean spark plugs regularly. A fouled or dirty spark plug causes difficulty
in starting and poor engine performance; set spark plug gap to recommended clearance in engine
manual.
Drive Shaft: Keep a coating of grease on the drive shaft and threads for easy installation or removal
and longer bushing life.
Spot Checks: Perform as required. Machine should be inspected with ignition in “off” position or
power cord disconnected. Do not perform inspections while machine is running.
● Check all fasteners for tightness- machine is subject to vibration.
● Check “V” belt for wear; adjust or replace as required.
● Check that wheels are clean and rotating freely.
● Check that inside of housing is clean; remove any build-up as required.
● Check that pulleys are aligned properly to ensure that “V” belt is running true (i.e. not at an angle).
Bearing Replacement Procedures
Important: disengage power supply. Do not attempt replacement while machine is operable
Sealed Bearing Replacement – Outboard Side: Remove drive shaft and cutter cage assembly as per
cutter change procedure. Remove snap ring and bearing shield from inside housing. Loosen and
remove bearing block flange by removing screws and lockwashers. Using a soft drift, drive out bearing
sleeve. Remove old bearing and clean parts which will be re-used. Carefully press new bearings into
flange. Clean and install bearing cover plate taking care to seat the plate flush. Re-install bearing sleeve.
Take extreme care to maintain aligned installation. Do not press sleeve into position if misaligned. Mount
bearing block to side of housing but do not tighten. From inside housing install bearing shield and snap
ring. Center block on the housing taking care that shield does not bind on bearing sleeve. Tighten bolts
when bearing block is in a free spin position.
Bearing Replacement – Drive or “V” Belt side: Remove belt guard and “V” belt. Loosen set screws,
remove key and remove pulley. Remove bearing block assembly by removing screws and lockwashers.
Remove snap ring and slip ring. Using a soft drift, drive out spindle. Take care not to burr or flare spindle.
Remove cover plate and bearing. Carefully press new bearing into block, clean and install bearing cover
plate being certain the plate fits flush. Press drive spindle into block. Install slip ring and snap ring.
Center and install spindle assembly to housing. Re-install pulley and key. Ensure pulley butts flush
against shoulder or spindle. Note: When removing spindle or sleeve, care must be taken not to damage
or distort these parts a soft drift is recommended to prevent damage.
6
TROUBLE SHOOTING GUIDE
PROBLEM CAUSE SOLUTION
GAS UNIT
1. Engine won’t start ● no fuel
● engine switch off
● kill switch grounded
● gas in air filter or
carburetor
● refuel
● remove air filter cover, crank
engine
● refer to engine manual
COMMON PROBLEMS
1. Cutters wearing unevenly
2. Drive shaft backs out while
running
3. Machine jumps on floor
4. “V” belt wearing rapidly
5. Uneven cut
● cage too low
● wrong setup
● material buildup
● cutters too tight
● no grease on threads
● cage lowered too far
● R.P.M. too low
● pulley misaligned
● wrong belt
● belt rubbing on surface
● wear on I.D. of front wheels
● wear on front axle
● raise cage
● see applications guide
● clean or change cutters
● remove one or more cutters
● grease threads
● not tightened properly
● adjust height knob
● reset throttle
● adjust pulley
● replace
● adjust height of machine
● replace wheels
● replace axle
Storage
The following steps should be taken to prepare your TSCAR-8H gas unit for
extended storage:
a. Close shutoff valve.
b. Siphon excess fuel from storage tank.
c. Start engine and run until it stalls due to lack of fuel. This will consume all the fuel in the carburetor and
prevent formation of deposits due to evaporating fuel.
d. Remove spark plug and pour two ounces of SAE 30 or SAE 40 motor oil into cylinder. Slowly crank the
engine two or three times to distribute the oil throughout the cylinder. This will prevent rust during
storage. Replace spark plug. Store the unit in an upright position in a cool, dry, and well ventilated
area.
To start your engine after prolonged storage
a. Refuel
b. Open shutoff valve
c. Start engine. Any excess oil residue will quickly burn off without harming operation
7
Specification
Motor / Weight / Working Width :
Working Size (L X W X H):
TSCAR-8H 65 x 19 x 13 in
Transportation
1. Always shut off engine when transporting machine.
2. Make sure lifting device has enough capacity to hold machine (see identification plate on machine
for weight).
3. Trolley wheel is used for short distance transportation.
8
Warranty
TOMAHAWK POWER products are covered by warranty for a period of 365 days from
the date of purchase - against defects in material or workmanship provided that:
z The product concerned has been operated and maintained in accordance with the operating
instructions.
z Has not been damaged by accident, misuse or abuse.
z Has not been tampered with or repaired by any unauthorized person.
The owner is responsible for the cost of transportation to and from the authorized repairer and the unit is
at the owners risk while in transit to and from the repairer.
Impact damage is not covered under warranty. Clutches are not covered under any warranty.
Engines are officially guaranteed by engine manufacturer. Please refer to the annex for
engine warranty.
For questions, quotes, servicing and more - call TOMAHAWK POWER at 866-577-4476
Maintenance Record
PREVENTATIVE MAINTENANCE AND ROUTINE SERVICE PLAN
This Scarifying Machine has been assembled with care and will provide years of service. Preventative
maintenance and routine service are essential to the long life of your Scarifying Machine.
After reading
through this manual thoroughly, you will find that you can do some of the regular maintenance yourself.
However, when in need of parts or major service, be sure to see your dealer. For your convenience we
have provided this space to record relevant data about your Scarifying Machine.
Invoice Number: Type of Machine:
Date Purchased: Dealer Name:
Serial Number: Dealer Phone:
REPLACEMENT PARTS USED MAINTENANCE LOG
PART NO. DESCRIPTION QTY COST DATE DATE OPERATION
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MODEL: TSCAR-8H
GAS CONCRETE SCARIFIER
(Honda Gasoline Engine)
SPARE PARTS MANUAL
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