Koike Sanso Kogyo KHC-600D User manual

Portable Automatic Gas Cutter
BFC00A01
KHC-600D
OPERATION MANUAL
KOIKE SANSO KOGYO CO.,LTD.
For every person who will be engaged in
operation and maintenance supervision, It is
recommended to read through this manual
before any operations, so as to permit
optimum operation of this machine.
Pipe hole Cutter

INTRODUCTION
Thank you very much for purchasing this product. Read this instruction
manual thoroughly to ensure correct, safe and effective use of the machine.
Read the manual first to understand how to operate and maintain the
machine.
Cooperation between colleagues in the workplace is essential for safe,
smooth operation. Make sure you read, understand and take all necessary
safety precautions.
SAFETY PRECAUTIONS
This product is designed to be safe, but it can cause serious accidents if not
operated correctly. Those who operate and repair this machine must read this
manual thoroughly before operating, inspecting and maintaining the machine. Keep
the manual near the machine so that anyone operates the machine can refer to it as
necessary.
■Do not use the machine carelessly without following the instructions in the manual.
■Use the machine only after you have completely understood the contents of the manual.
■If an explanation in the manual is difficult to understand, contact our company or sales service office.
■Keep the manual to hand at all times and read it as many times as is necessary for a complete
understanding.
■If the manual becomes lost or damaged, place an order with our company or sales service office for a
new one.
■When transferring the machine to a new owner, be sure to hand over this instruction manual as well.
QUALIFICATIONS FOR MACHINE OPERATOR
Operators and repair staff of this machine must completely understand the
contents of the instruction manual and have either of the following qualifications:
1. Gas welding foremen’s license
2. Completion of gas welding training course
3. Approval by the Minister of Labor

Symbol
Title
Meaning
General
General caution, warning, and danger.
Be careful not to get your
fingers caught.
Possible injury to fingers if caught in the insertion
port.
Caution: Electric shock!
Possible electric shock under special conditions.
Ground this equipment.
Operators must ground the equipment using the
safety grounding terminal.
Pull out the power plug
from the outlet.
Operators must unplug the power plug from the
outlet when a failure occurs or when there is a
danger of lightning damage.
Caution against bursting
Possible bursting under certain conditions.
General
General warning.
Caution: Hot!
Possible injury due to high temperature under
certain conditions.
Caution: Ignition!
Possible ignition under certain conditions.

KHC-600D
CONTENTS
1. Safety Information 1
■WARNING 1
■CAUTION 1
■NOTICE SIGNS 1
1.1 General machine safety precautions 1
1.1.1 Machine safety 1
1.1.2 Safety clothing 1
1.1.3 Operations and handling safety precautions 2
1.1.4 Electrical system precautions 2
1.1.5 Maintenance and inspection precautions 2
1.2 Gas cutting safety precautions 3
1.2.1 Prevention of explosion 3
1.2.2 Pressure regulator safety precautions 3
1.2.3 High pressure gas cylinder safety precautions 3
1.2.4 Safety precautions for hoses 3
1.2.5 Safety precautions for fire 3
1.2.6 Safety precautions for skin burns 4
2. Locations of safety labels 5
3. Outline of machine 6
3.1 Features of machine 6
3.2 Name and function of each section 6
3.3 Specifications 7
4. Preparation for operation 8
4.1 Contents of package 8
4.2 Machine assembly 8
4.3 Preparation for operation 8
4.3.1 Connecting the power cable 8
4.3.2 Connecting the gas supply hose 8
4.3.3 Connecting the tip 9
4.3.4 Mounting on pipe to be cut 9
4.3.5 Cutting speed setting 10
5. Cutting operation 11
5.1 Safety measures prior to operation 11
5.1.1 Grounding the machine 11
5.1.2 Selection of tip 11
5.1.3 Operation of running direction changeover switch 11
5.2 Ignition and flame adjustment 11
5.3 Cutting and piercing method 12
5.4 Procedures for starting cutting operation and extinguishing the flame 12
5.5 Safety measures against backfire and flashback 13
5.5.1 Prevention of backfire 13
5.5.2 Prevention of flashback 13
5.6 Option 13
5.6.1 Method of mounting the fixture for small-diameter pipe 13
5.6.2 Method of mount overhang stand 14
6. Maintenance and inspection 15

KHC-600D
6.1 Daily inspection 15
6.2 3-6 month maintenance and inspection 15
7. Trouble shooting 15
1) The machine will not move. (The motor will not run.) 15
2) The speed can not be controlled. (The motor runs.) 16
3) The machine will not move. (The motor runs.) 16
8. Wiring diagram 17
9. Assembly drawing of KHC-600D 17
10. Parts list 18
10.1 Distribution unit 18
10.2 Drive unit 20
10.3 Torch unit 22
10.4 Stand unit 24
10.5 Electric unit 26
10.6 Small diameter kit 28
10.7 Over-hang (option) 29
11. Cutting Data 31
102 (STANDARD SPEED) for Acetylene 31
102-D7 (HIGH SPEED) for Acetylene 31
106 (STANDARD SPEED) for Propane 32
106-D7 (HIGH SPEED) for Propane 32

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1 Safety information
Many accidents are caused by operation, inspection, and maintenance which disregard the basic
safety rules. Carefully read, understand, and master the safety measures and precautions
described in this instruction manual and on the machine before operating, inspecting, and
maintaining the machine.
The safety messages are classified as indicated on the machine safety labels:
■WARNING
This word is used in a warning message and a warning label is positioned at places that could
cause injury or serious accident.
■CAUTION
This word is used in a caution message and a caution label is positioned at places that could cause
slight injury or machine damage. This is also used as a caution for frequent dangerous actions.
■NOTICE SIGNS
This is a sign to show machine operators and maintenance engineers items that relate directly to
damage of machines and surrounding facilities and equipment.
1.1 General machine safety precautions
Read and fully understand the following important safety information:
1.1.1 Machine safety
1.The machine casing is mainly made of aluminum alloy to reduce weight. For this reason, be careful
not to drop a heavy item on the machine, or not drop the machine when carrying it, since the alloy is
not designed to withstand such impact.
2.When mounting hoses to the torch and distributor, tighten the nut with the attached wrench. After
mounting, be sure to check there is no gas leak with a detection liquid. If a gas leak is found, retighten
the nut firmly.
3.When fixing a tip to the torch, tighten the nut with the two wrenches attached. In addition, avoid
damaging the taper part of the tip since this may cause backfire.
4.Never disassemble the machine other than during maintenance and inspection. Otherwise,
malfunction will result.
5.Never remodel the machine. Remodeling is very dangerous.
6. When changing the direction, make sure that the direction switch is in the neutral (stop) position, and
operate the direction switch after the machine has stopped.
7. Always turn the power off when not in use.
8. Never use the machine outdoors when the weather is wet. This will cause failure of the machine and
could cause a fatal accident by electric shock.
1.1.2 Safety clothing
1.Be sure to wear protector’s gauntlets, goggles, helmet, and safety shoes during operation.
2.Avoid operating the machine with wet clothes or hands in order to prevent electric shock.

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1.1.3 Operation and handling safety precautions
1. Read this instruction manual before operating the machine.
2. Mount and center the machine correctly and confirm correct motion before operation.
3. Before connecting the power plug to the outlet, make sure that the power switch is in the OFF
position (or the normal/reverse changeover switch is in the stop position).
4. Prior to operating the machine, check the safety of the surroundings to avoid accidents.
5. Never move the machine while the preheat flame is on.
6. Take great care of spatters and dross when operating the machine at a high position. They may
injure people below.
7. When the clutch will not engage easily, turn the pipe by hand lightly move the clutch lever to
engage it.
8. Secure the horizontal bar with the stopper to prevent the bar from falling.
9. Hold the I-nut attached to the leg to carry the machine.
1.1.4 Electrical system precautions
1. Be sure to check the input power voltage of the machine before operation. The input power voltage
should be in the range of ±10% of the rated voltage. The machine should not be operated out of
this range.
2. The metal plugs are screw-threaded, therefore, fully tighten them so that they will not come loose
during operation.
3. Be sure to ground the power cable of the machine.
4. Stop operation and turn off the power in the following cases,
and ask a qualified electrician to repair the machine.
1)Broken or abraded cables
2)When the machine has been in contact with water, or in case of liquid damage to the machine.
3)Abnormal machine operation despite operating the machine according to the instruction manual
4)Machine breakdown
5)Poor machine performance that requires repair
5. Periodically inspect the electrical system.
1.1.5 Maintenance and inspection precautions
1. Ask a qualified electrician to perform repair and inspection service.
2. Disconnect the power plug before inspecting and repairing the machine.
3. Maintain the machine periodically.

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1.2 Gas cutting safety precautions
Strictly observe the safety rules and precautions to ensure the safety of gas cutting operations.
Operators and supervisors MUST keep safety in mind.
1.2.1 Prevention of explosion
1. Never cut pressurized cylinders or hermetically sealed containers.
2. Ensure sufficient ventilation for gas cutting to prevent the air from becoming stale.
1.2.2 Pressure regulator safety precautions
1. Before starting operation, check that all pressure regulators are operating correctly.
2. Ask a skilled repair engineer to perform maintenance and inspection service.
3. Do not use pressure regulators from which gas is leaking, nor malfunctioning pressure regulators.
4. Do not use pressure regulators smeared with oil or grease.
1.2.3 High Pressure gas cylinder safety precautions
1. Never use broken cylinders or cylinders from which gas are leaking.
2. Install cylinders upright and take measures to prevent them from falling.
3. Use cylinders only for specified purposes.
4. Do not smear container valves with oil or grease.
5. Install cylinders in a place free from heat, sparks, slag, and open flame.
6. Contact the distributor if the container valves will not open.
Never use a hammer, wrench, or other tools to forcibly open container valves.
1.2.4 Safety precautions for hoses
1.Use the oxygen hose for oxygen gas only.
2.Replace cracked hoses or other hoses damaged by sparks, heat, unshielded fire, etc.
3.Install hoses without twisting.
4.To prevent breakage of hoses, take great care during operation and transportation.
5.Do not hold the hoses when moving the machine.
6.Periodically check the hoses for damage, leakage, fatigue, loose joints, etc, to ensure safety.
7.Cut hoses to the minimum possible length. Short hoses reduce hose damage and pressure drop, as
well as reduce the flow resistance.
1.2.5 Safety precautions for fire
Take safety precautions to prevent fire prior to gas cutting.
Ignoring hot metal, sparks, and slag could cause a fire.
1.Keep a fire extinguisher, fire extinguish sand, bucket full of water, etc. ready on the site where gas
cutting is performed.
2.Keep flammables away from the cutting area to avoid exposure to sparks.
3.Always cool down steel plates that have become hot after cutting, as well as hot cut parts or scrap,
before bringing them close to flammables.
4.Never cut containers to which flammable materials are stuck.

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1.2.6 Safety precautions for skin burns
Observe the safety precautions to prevent skin burns. Ignoring heat, spatter, and sparks during
operation could cause a fire or burned skin.
1.Do not perform cutting near flammables. (Move flammables well away from the sparks.)
2.Do not cut containers filled with flammables.
3.Do not keep lighters, matches, and other flammables nearby.
4.Flames from the torch will burn the skin. Keep your body away from the torch and tip, and check the
safety before operating the switches and valves.
5.Wear the correct protectors to protect your eyes and body.
6.Correctly tighten the tip to prevent backfire.
●When fixing a tip to the torch, tighten the nut with the two wrenches attached.
●If the tip is tightened excessively, it will be heated during cutting and tightened still more, making it
difficult to remove the tip.
●Avoid damaging the taper of the tip since this may cause backfire.
7.Check with soapsuds for any leakage of gas from the connection part of the distributor, hose and
torch.
Never use oil or grease on the connection of the oxygen pipe to avoid backfire which may lead to
explosion.
8.Be sure to check the following when igniting:
●Place the torch on the torch holder before igniting.
●Always wear the required protectors (gauntlets, helmet, goggles, etc.)
●Check for any obstacles, dangerous materials and flammables near or in the direction of cutting.
Determine the gas pressure.
●The gas pressure must be within the appropriate range. (For the gas pressure, refer to the Cutting
Data.)
9.The torch, tip and heat shield are heated to a very high temperature. Always wear gauntlets when
handling them. Also the surface after cutting is very hot so do not touch it even while wearing
gauntlets.
10.Never move the machine while the preheat flame is on.

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2 Locations of safety labels
Safety labels and other labels for correct operation are affixed to the machine.
Carefully read the labels and follow the instructions on them when operating the machine.
Never remove the labels. Keep them clean and legible at all times.

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3 Outline of Machine
3.1 Features of machine
The hole cutter KHC-6000 is used to make circular holes to mount nozzles that are at right angles
to a steel pipe of a high-pressure vessel or heat exchanger.
The machine can cut flat circles as well.
3.2 Name and function of each section
1. Operation box
Controls the speed and turning direction of the
machine.
2. Clutch
Lift the clutch lever to disengage (OFF) the
clutch and lower it to engage (ON) the clutch.
3. Distributor
4. Handle
Used to turn the drive rotary section (when the
clutch is disengaged)
5. H-lever handle
This lever permits tracing movement along a
steel pipe. The drive unit is so constructed
that two turns of the lever corresponds to one
turn of the torch. As stated later, the torch will
automatically move up and down along the
steel pipe according to the preset H value.
6. Center
Points at the center of a hole to be cut. During
cutting and when cutting an underside bevel
of a
small hole, the center shall be kept in an
upper section.
7. Cutting stopper
In anticipation of cutting more than one circle
with the same diameter, two cutting stoppers
are
provided on the horizontal bar.
8. Horizontal adjustment handle
9. Torch holder
10. Leg
To be placed on a pipe.

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3.3 Specifications
Weight: 26 kg (with leg)
Machine size: 1050 x 500 x 760mm
Power: ±10%
Speed control: Control with dial operation
Torch rotation speed: 0.12- 1.2rpm
Cutting thickness: 5- 50mm
Bevel angle: 0 – 45°
Cutting diameter: φ80 – φ600 (Bevel cut φ80 – φ500)
Up/down stroke: 0 - 100mm
Interface: Ratio to branch to main pipe diameters 1:2 and above
Motor: DC24V 15W 5000rpm
Revolving torch: Tip revolving radius R40 - R300mm
Tip: 102 (for acetylene) or 106 (for propane)
Gas: oxygen, acetylene gas, or LPG gas
●Accessories
Tip 102 (for acetylene) or 106 (for propane) No.0, 1, 2: l pc each
Tip cleaner: 1 set
Lighter: 1 pc
Screwdriver: 1 pc
Fuse (l A): 2 pcs
Spanner (A, B, C): 1 set
Power cable: 1 set
●Option
Small diameter kit
Over-hang

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4 Preparation for operation
4.1 Contents of package
The contents of the standard package are shown below. Check them carefully before assembling
the machine.
Body 1 set
Distributor 1 set
Torch holder 1 set
Torch 1 pc
Hose
Distributor hose (3pcs: 600L) 1 set
Power cable (3P x 5M) 1 pc
Tip 102 (for acetylene) or 106 (for propane) #0,1,2 1 pc each
Tip cleaner 1 set
Screw driver 1 pc
Spanner (A,B,C) 1 set
Fuse (lA) 2 pcs
Lighter 1 pc
4.2 Machine assembly
1.Take out the main unit and the leg of the machine from the box.
2. Place the leg on the pipe, mount the main unit on the rectangular pipe, and secure it with the wing
nut from above the supporting plate.
3. Check that the torch holder, gas distributor, torch, etc. are in position.
4. Attach the primary hose to the gas distributor.
Ox hose (Oxygen)
Gas hose (Acetylene or LPG)
4.3 Preparation for operation
4.3.1 Connecting the power cable
1. Connect the power cable to the body.
2. Before plugging the metal plug on the power cable side into the socket on the machine side, check that
there is no dust inside.
3. The metal plugs are screw-threaded, therefore, fully tighten them so that they will not come loose during
operation.
4.3.2 Connecting the gas supply hose
1. Connect the respective gas supply hoses to the primary hose.
2. Securely tighten the joints and check that there is no gas leak.

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4.3.3 Connecting the tip
1. Select a proper tip according to the thickness of the steel plate and attach it to the torch.
(To select a tip, refer to the table of cutting data.)
•When fixing a tip to the torch, tighten the nut with the two wrenches attached.
•If the tip is tightened excessively, it will be heated during cutting and be tightened still more. And
then it makes difficult to remove the tip.
•In addition, avoid damaging the taper of the tip since this may cause backfire.
4.3.4 Mounting on pipe to be cut
1. Mark a center line in the longitudinal direction, as well as the center and radius of a cutting circle,
on the side of a steel pipe to be cut.
2. Set the hole cutter (KHG-600D) in alignment with the center line and the center of the cutting
hole.
3. Set the torch in the specified hole cutting position by means of the radius setting handle, and
secure the cutting stopper.
4. Simple H-lever setting method
1) Disengage the clutch (OFF) and bring the torch to pointA (0 degrees).
Set the lever at 0.
2) Move the torch to point B (45 degrees) and set the distance between the tip and steel pipe
by means of the torch up/down handle.
3) Move the torch to point C (90 degrees) and set the torch height again by the H-lever
adjustment handle.
＊Rough height adjustment is completed. Turn the torch once to check to see if the torch
height is constant.
(1) H setting
(2) H-lever
Adjustment handle
(3) H-lever setting
Relationship between angle and H-lever
5. Turn the torch so that it will be in the highest position (H-lever to be perpendicular), and stop it.
6. Set the torch above the axis of the steel pipe, and engage (ON) the clutch lever.
7. Turn ON the operation switch for idling, and check that the H-value setting is correct.

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4.3.5 Cutting speed setting
・Adjust the setting of cut speed to become a specified turn number in the light of a list shown
below.
A number of turn r.p.m.
Plate thickness
(mm)
5
5～10
10～15
15～30
30～40
40～50
50～
Cutting speed
(mm/min)
660
550
～660
490
～550
400
～490
350
～400
320
～350
200
～320
Cutting dia.φ80
1.4
1.3
0.79
φ90
1.4
1.2
1.1
0.71
φ100
1.3
1.1
1.0
0.64
φ200
1.0
0.87
0.79
0.64
0.56
0.51
0.32
φ300
0.70
0.58
0.52
0.42
0.37
0.34
0.21
φ400
0.52
0.44
0.39
0.32
0.28
0.25
0.16
φ500
0.42
0.35
0.31
0.25
0.22
0.2
0.13
φ600
0.35
0.29
0.26
0.21
0.18
0.17
0.10
・When the cutting diameter is 80-100, move the center to the upper position and secure it with
wing bolt.

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5 Cutting operation
5.1 Safety measures prior to operation
5.1.1 Grounding the machine
The cable of this machine is equipped with a grounding wire. For safety, be sure to ground the wire
as follows, in addition to checking the connection of the power cable.
■How to ground the machine
5.1.2 Selection of tip
Referring to the Cutting Data, select the suitable tip according to the plate thickness.
For a heavily rusted plate or for a bevel cutting of more than 20 degrees, select the tip one grade higher
than the one shown in the Cutting Data.
5.1.3 Operation of running direction changeover switch
・By changing the direction switch, the machine can move forward and backward. The neutral
position on the switch is the stop position of the machine.
・When changing the direction, make sure that the direction switch is in the neutral (stop) position,
and operate the direction switch after the machine has stopped.
・Be sure that the switch is in the neutral position before starting the machine.
・Make sure that the switch is in the neutral position before turning the power on. If the switch is in
the forward or backward position, the machine will start as soon as the power is turned on,
which could cause serious accidents.
・Never touch the H-lever while the machine is moving,
otherwise, your hand may be caught.
5.2 Ignition and flame adjustment
Adjust the gas pressure according to the Cutting Data. The data shows the pressure when all the valves
are open. Readjust the pressure after ignition.
■Flame adjustment method
1. Open the fuel gas valve 1/4 to 1/2 a turn, and light the torch with an igniter.
2. Then, open the preheating oxygen valve gradually until a white cone of the standard flame gas been
obtained. (The incandescent area should be uniform and about 5-6 mm (3/16 –1/14”) in length.)
3. Open the jet oxygen valve fully. Readjust the flame if its condition has changed. A disorderly flow of
the jet oxygen will adversely affect the quality of the cutting surface. In such a case, clean the tip with
a suitable cleaning needle while the jet oxygen is flowing.
4. Appropriate distance between the tip end and cutting surface:
・Acetylene gas ……8-10 mm
・LPG gas ……………5-8 mm
・The ground pin is attached to the rubber plug of a cabtyre cord. Please use a power receptacle
with a ground pin opening.

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5. Neutral flame ensures good quality cut surfaces. (Oxygen flame may be used for bevel cutting.)
Oxygen flame causes short cutting-oxygen current, allowing slugs to adhere, melting the upper edge
of the cutting surface, and causing adverse effects on the cut surface. Similar defects will result
when the cutting oxygen pressure is too high.
(1)Oxidizing Flame
(2)Neutral Flame
(3)Carbonizing Flame
5.3 Cutting and piercing method
1. Cut in from the end of steel plate.
2. Pierce steel plate before cutting.
3. Drill a hole before cutting.
■Piercing method
1) Ignite and adjust the flame.
2) Thoroughly preheat the cut-in point until it is white hot.
3) Open the cutting oxygen valve to pierce the steel plate. The tip should be about 15-20 mm from
the plate to prevent slag from splashing onto the tip and adhering there, which will shorten the
working life of the tip.
5.4 Procedures for starting cutting operation and extinguishing the flame
1. Align the tip with the cutting start point, ignite, and then adjust the flame.
2. Sufficiently preheat the cutting start point.
3. After sufficient preheating, let the cutting gas out and cut with the radius setting handle
simultaneously.
4. Turn on the switch right before the machine touches the stopper, and completely cut up to the
stopper position.
5. Carefully check the cutting condition, and control the cutting speed with the speed adjuster. For
the cutting speed, refer the Cutting Data.
6. Extinguish the flame after cutting as follows.
1) Turn off the motor switch (or turning direction switch).
2) Close the cutting oxygen valve.
3) Close the preheating oxygen valve.
4) Close the fuel gas valve.

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5.5 Safety measures against backfire and flashback
5.5.1 Prevention of backfire
Backfires may cause serious accidents or fires. Be careful to prevent such disaster. When a backfire
occurs, find the cause and inspect and maintain the machine correctly before using the machine again.
The followings are causes of backfire:
1) Improper gas pressure adjustment
2) Overheated tip
3) Slag clogged in tip
4) Damage to the tapered section of the tip or torch will cause backfire.
5.5.2 Prevention of flashback
Flashback could cause fire and break the machine. Should there be a hissing sound in the torch, quickly
take the following action:
1) Close the preheating oxygen valve.
2) Close the fuel gas valve.
3) Close the cutting oxygen valve.
Should flashback occur, find the cause and take appropriate action before using the machine again.
5.6 Option
5.6.1 Method of mounting the fixture for small-diameter pipe
1. Parts assembling method
1) Attach the bolt fixing plate to the leg.
2) Attach the chain mounting plate and chain shaft in the same way.
3) Attach the chain putting shaft, handle, and chain as shown in the figure.
2. Setting
1) Determine the chain length according
to the pipe diameter.
2) Slide the chain along the pipe.
3) Roughly position the center, and turn
the handle clockwise to tension the
chain to the extent that the machine
can move slightly.
4) Adjust the alignment correctly, and
secure the fixture firmly again.

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5.6.2 Method to mount overhang stand
1. Parts assembling dimensions
1) Assemble the overhang stand by according to item 1, 1)-3), "Method to mount the fixture for
small-diameter pipe.'
2) Attach the main unit to the overhang stand.
2. Setting
1) Determine the chain length according to the pipe diameter.
2) Slide the chain along the pipe.
3) Roughly position the center, and turn the handle clockwise to tension the chain to the extent that
the machine can move slightly.
4) Adjust the alignment correctly, and secure the fixture firmly again.
(1) Center of torch turning

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6 Maintenance and inspection
Refer to the following points for maintaining and inspecting the machine in order to use the machine
under the best conditions.
6.1 Daily inspection
1. Wipe the outside of the machine with a clean cloth.
2. Remove dust and iron chips from the rack section of the cross-feed pipe.
3. Check for abnormal sound, smell, vibration, etc.
4. Check the cable connection for loosening. Is the cable heated?
5. Check the torch according to the instruction manual for the power supply.
6. Check the rotary distributor for the leakage of gas or cooling water.
6.2 3-6 month maintenance and inspection
1. Remove the lower cover from the main unit, and grease the bearing. (When the grease is dirty.)
2. Check the power cable for disconnection.
3. Check the grounding condition.
4. Check the torch lead for disconnection.
5. Remove dust from the inside of the control panel.
6. Measurement of insulation resistance.
(When the applied voltage is 500V, check that the resistance is 5MΩ or more.)
Note: Operation of the machine with poor insulation condition may cause an accident. Be sure to
conduct periodical inspection.
7. Remove the motor base, and apply molybdenum oil to the drive gear and clutch section.
8. When the internal drive gears are abraded severely, replace them.
7 Trouble Shooting
1) The machine will not move. (The motor will not run.)
Cause
Inspection point
Correction
1)Power is not supplied.
Check the power supply.
Check the connections.
Replace the power
supply if it is defective.
2)Fuse blown
Check the 1A fuse in the control box
to see if it has blown.
Replace the blown
fuse.
3)Disconnection of
power cable.
Check the cable with a tester. "∞"
indicates disconnection.
Repair the
disconnected cable
4)Poor connection
Check that lead wires are correctly
connected to the terminal block.
Connect the wires
again.
5)Defective switch
Remove the switch and check for
continuity between terminals with a
tester.
Replace the switch if it
is defective.
6)Defective speed
controlling resistor
Check with a tester that the
resistance is 50 kΩ.
Replace the resistor if it
is defective.
7)Disconnection of lead
wire
Check for continuity between the lead
wires with a tester.
Replace disconnected
lead wires.