Sherpa ST-CS4500 User manual

OWNER’S MANUAL
PETROL CHAIN SAW 4518 AND 5020
USER MANUAL, MAINTENANCE INSTRUCTIONS
AND SPARE PARTS
READ THIS MANUAL CAREFULLY BEFORE OPERATING THE MACHINE
WARNING:
THIS SYMBOL INDICATES IMPORTANT SAFETY PRECAUTIONS
OPERATOR’S MANUAL
ST-CS4500
18” PETROL CHAINSAW
IMPORTANT! IT IS ESSENTIAL THAT YOU READ THE INSTRUCTIONS IN THIS
MANUAL BEFORE ASSEMBLING, OPERATING AND MAINTAINING THIS MACHINE.

OWNER’S MANUAL
PETROL CHAIN SAW 4518 AND 5020
USER MANUAL, MAINTENANCE INSTRUCTIONS
AND SPARE PARTS

READ THIS MANUAL CAREFULLY BEFORE OPERATING THE MACHINE
WARNING:
THIS SYMBOL INDICATES IMPORTANT SAFETY PRECAUTIONS

■SAFETY SYMBOLS
1. Warning, Danger, Caution
2. Read the documentation and safety
instructions which are provided in this
user manual.
3. When operating the chainsaw, use
protective equipment, helmet, visor, ear
defenders,and chainsaw safety
clothing.
4. Use the chain saw with two hands.
5. Keep hands and feet away from moving
parts. Always keep a safe distance from
the saw chain.
6. Beware of objects being thrown from
the operating zone.
7. Warning! Danger of kickback
8. Directive 2000-14/CE. Guaranteed noise
levels.
9. Danger: risk of exhaust fumes
intoxication.
10. Danger: risk of fire or explosion.
11. Hot surface, risk of burn.
■Taking care of warning labels
Always keep warning labels clean and free of scratches,which might make them illegible or difficult to read. If
the warning labels provided with your chain saw become damaged, peel off, or otherwise become illegible or
difficult to read, order new labels from the authorised servicing dealer and replace the damaged labels. When
applying new labels, first wipe away any dirt and dry the surface before applying the new label in the same
place as the original label.

■ EXPLANATION OF SYMBOLS ON THE MACHINE
For safe operation and maintenance, symbols are carved in relief on the machine:
FUEL TANK
Fuel tank 2 stroke mix
Position: Fuel cap
CHAIN OIL
Chain oil tank
Position: oil cap
IGNITION SWITCH
Setting the switch to the “O” position, the engine stops immediately.
Position: Left of the rear handle.
CHOKE OPERATION
Starting mode when the engine is hot.(choke off)
Position: Air cleaner cover.
Starting mode when the engine is cold. (choke on)
Position: Air cleaner cover.
CARBURETOR ADJUSTMENTS
The screw under the “H” stamp is High-speed adjustment screw.
Position: Left side of top cover
The screw under the “L” stamp is Slow-speed adjustment screw.
Position: Left side of top cover
The screw the “T” stamp is Idle adjustment screw.
Position: Left side of top cover
CHAIN BRAKE OPERATION
Shows the directions that the chain brake is Released (white arrow) and
Activated (black arrow).
Position: Front of chain brake cover

■ADJUSTING THE CARBURETTOR
The carburettor has been factory adjusted, but may require fine tuning due to a change in operating conditions.
Carburettor adjustments should be made by the supplying dealer using specialist tools as follows.
•Make sure that the air filter and fuel filter are clean,and the fuel is freshly mixed.
•Stop the engine and screw in both the H and L needles until they stop. Never force them. Then set them back
the initial number of turnsas shown below.
Hscrew: 1 +or-¼
Lscrew: 1 ¼ +or-¼
1. Start the engine and allow it to warm up at half-throttle with saw chain and guide bar fitted.
2. Turn the Lscrew slowly to find a position where idling speed is at maximum, then set the Ladjusting screw
back a quarter (1/4) turn (counter clockwise).
3. Turn the idle adjusting screw Tcounter clockwise so that the saw chain does not turn. If the idling speed is
too slow, turn the screw clockwise.
4. To check the low speed adjustment pull the throttle fully and the engine should not die, if it tries to die, open
the Lscrew slightly and re-adjust idle if necessary.
5. Set the engine to full throttle, the Hadjusting screw is turned clockwise to reduce fuel, as the fuel mixture is
reduced, the engine will run faster until it sounds as if it is screaming, at this point, turn the Hscrew counter
clockwise by quarter (1/4) turn to allow more fuel.
Atwo stroke engine relies on the fuel mixture to cool the engine; a lean fuelled engine will run fast but can
overheat and lead to engine seizure.
Component Procedure Before
use
Every
25
Hours
use
Every
50
Hours
use
Every
100
Hours
use
note
Fuel leaks / spillage Wipe out X
Fuel tank, filter Inspect / clean
X
Replace if necessary
Idle adjust screw See paragraph 3 above XAdjust carburettor if
necessary
Spark plug BPMR7A Clean and readjust plug
gap XGAP .025” (0.6-0.7mm) Replace, if necessary
Cylinder fins,Intake air
cooling vent
Clean X
Muffler, Spark arrestor,
cylinder exhaust port
Clean X
Throttle lever, ignition switch Check operation X
Air filter Clean X
Screws, nuts, bolts Tighten / replace X X Not adjusting screws
Oiling port Clean X
Guide bar Clean X
Sprocket Inspect / replace X
Saw chain Inspect / sharpen X
Dia 1
T idle adjust screw
Llow speed adjust screw
Hhigh speed adjust screw
■ADJUSTING THE CARBURETTOR
The carburettor has been factory adjusted, but may require fine tuning due to a change in operating conditions.
Carburettor adjustments should be made by the supplying dealer using specialist tools as follows.
•Make sure that the air filter and fuel filter are clean,and the fuel is freshly mixed.
•Stop the engine and screw in both the H and L needles until they stop. Never force them. Then set them back
the initial number of turnsas shown below.
Hscrew: 1 +or-¼
Lscrew: 1 ¼ +or-¼
1. Start the engine and allow it to warm up at half-throttle with saw chain and guide bar fitted.
2. Turn the Lscrew slowly to find a position where idling speed is at maximum, then set the Ladjusting screw
back a quarter (1/4) turn (counter clockwise).
3. Turn the idle adjusting screw Tcounter clockwise so that the saw chain does not turn. If the idling speed is
too slow, turn the screw clockwise.
4. To check the low speed adjustment pull the throttle fully and the engine should not die, if it tries to die, open
the Lscrew slightly and re-adjust idle if necessary.
5. Set the engine to full throttle, the Hadjusting screw is turned clockwise to reduce fuel, as the fuel mixture is
reduced, the engine will run faster until it sounds as if it is screaming, at this point, turn the Hscrew counter
clockwise by quarter (1/4) turn to allow more fuel.
Atwo stroke engine relies on the fuel mixture to cool the engine; a lean fuelled engine will run fast but can
overheat and lead to engine seizure.
Component Procedure Before
use
Every
25
Hours
use
Every
50
Hours
use
Every
100
Hours
use
note
Fuel leaks / spillage Wipe out X
Fuel tank, filter Inspect / clean
X
Replace if necessary
Idle adjust screw See paragraph 3 above XAdjust carburettor if
necessary
Spark plug BPMR7A Clean and readjust plug
gap XGAP .025” (0.6-0.7mm) Replace, if necessary
Cylinder fins,Intake air
cooling vent
Clean X
Muffler, Spark arrestor,
cylinder exhaust port
Clean X
Throttle lever, ignition switch Check operation X
Air filter Clean X
Screws, nuts, bolts Tighten / replace X X Not adjusting screws
Oiling port Clean X
Guide bar Clean X
Sprocket Inspect / replace X
Saw chain Inspect / sharpen X
Dia 1
T idle adjust screw
Llow speed adjust screw
Hhigh speed adjust screw

■ADJUSTING THE CARBURETTOR
The carburettor has been factory adjusted, but may require fine tuning due to a change in operating conditions.
Carburettor adjustments should be made by the supplying dealer using specialist tools as follows.
•Make sure that the air filter and fuel filter are clean,and the fuel is freshly mixed.
•Stop the engine and screw in both the H and L needles until they stop. Never force them. Then set them back
the initial number of turnsas shown below.
Hscrew: 1 +or-¼
Lscrew: 1 ¼ +or-¼
1. Start the engine and allow it to warm up at half-throttle with saw chain and guide bar fitted.
2. Turn the Lscrew slowly to find a position where idling speed is at maximum, then set the Ladjusting screw
back a quarter (1/4) turn (counter clockwise).
3. Turn the idle adjusting screw Tcounter clockwise so that the saw chain does not turn. If the idling speed is
too slow, turn the screw clockwise.
4. To check the low speed adjustment pull the throttle fully and the engine should not die, if it tries to die, open
the Lscrew slightly and re-adjust idle if necessary.
5. Set the engine to full throttle, the Hadjusting screw is turned clockwise to reduce fuel, as the fuel mixture is
reduced, the engine will run faster until it sounds as if it is screaming, at this point, turn the Hscrew counter
clockwise by quarter (1/4) turn to allow more fuel.
Atwo stroke engine relies on the fuel mixture to cool the engine; a lean fuelled engine will run fast but can
overheat and lead to engine seizure.
Component Procedure Before
use
Every
25
Hours
use
Every
50
Hours
use
Every
100
Hours
use
note
Fuel leaks / spillage Wipe out X
Fuel tank, filter Inspect / clean
X
Replace if necessary
Idle adjust screw See paragraph 3 above XAdjust carburettor if
necessary
Spark plug BPMR7A Clean and readjust plug
gap XGAP .025” (0.6-0.7mm) Replace, if necessary
Cylinder fins,Intake air
cooling vent
Clean X
Muffler, Spark arrestor,
cylinder exhaust port
Clean X
Throttle lever, ignition switch Check operation X
Air filter Clean X
Screws, nuts, bolts Tighten / replace X X Not adjusting screws
Oiling port Clean X
Guide bar Clean X
Sprocket Inspect / replace X
Saw chain Inspect / sharpen X
Dia 1
T idle adjust screw
Llow speed adjust screw
Hhigh speed adjust screw

TROUBLESHOOTING
Engine will not start, power loss.
-Check that the fuel tank is not empty. Fill with mixed fuel.
-The fuel does not reach the carburettor. Change the fuel filter in the fuel tank.
-There is water in the fuel. Drain and clean the fuel system .
-The air filter is dirty. Clean the air filter.
-There are carbon deposits in the exhaust muffler restricting the engine. Clean or change the muffler.
-Spark plug is worn. Replace spark plug.
-Saw chain will not rotate. Chain brake is activated. Deactivate chain brake.
■Specifications
MITOX 4518
Power unit:
Displacement (cm3): ..………………………………45.0
Fuel: …………....Mixture (petrol 32 :two stroke oil 1)
Fuel tank capacity (ml): ......……………….……….550
Oil tank capacity (ml):....…….………….…………..260
Carburettor: .……….....Diaphragm type (Walbro WT)
Ignition system: ……………………...Electronic (CDI)
Spark plug: ...………………………….,NGK:BPRM7A
Chain lubrication system: ....….……Automatic pump
Chain Oil: ..………………………....SAE 30 Anti-fling
Dimensions: power unit (LxWxH)mm)..425x240x288
Weight Power unit only (kg): ..……………………..6.0
Peak power (kw): …………………..……………1.8kw
Idling speed (r/min): …..………………………….3200
Max cutting speed (r/min): ....…………………..10000
Guide bar:
Type: ……………………………...……Sprocket nose
Size (in): .........……………….…………………...…18”
Oregon Part No: ..……………………...188PXBK095
Saw chain:
Type: ......….……….....Oregon 34SL 72 Drive links
Pitch (in): ....…………………….………………..0.325”
Gauge (in): ..........…………………….………....0.058”
Specifications are subject to change without notice.
■Specifications
MITOX 5020
Power unit:
Displacement (cm3): ...……………………………...49.3
Fuel: …………....Mixture (petrol 32 : two stroke oil 1)
Fuel tank capacity (ml): ..………………….……….550
Oil tank capacity (ml): ...…….………….…………..260
Carburettor: .……….....Diaphragm type (Walbro WT)
Ignition system: ....…………………...Electronic (CDI)
Spark plug: ...…………………………..NGK:BPRM7A
Chain lubrication system: ….….……Automatic pump
Chain Oil: ...………………………....SAE 30 Anti-fling
Dimensions: power unit (LxWxH)mm)..425x240x288
Weight Power unit only (kg): ...……………………..6.0
Specifications are subject to change without notice.
Peak power (w): ....………………..…….………2.2kw
Idling speed (r/min): …..………………………….3200
Max cutting speed (r/min): ...…………………..10000
Guide bar:
Type: ……………………………..…….Sprocket nose
Size (in): ..........……………….…………………… 20”
Oregon Part No:..……………………...208SLGK095
Saw chain:
Type: ...……………......Oregon 34SL 78 Drive links
Pitch (in): ......…………………………………....0.325”
Gauge (in): .........…………………….……..…..0.058”
Model no. ST-CS4500
Engine type 1E43F
Equipment mobility Hand-held
Engine displacement 45 cm3
Maximum engine power 1.8kw
Engine speed 10800min-1
Engine idling speed 3000±200min-1
Maximum chain speed 20.8 m/s
Usable cutting length 44cm / 50cm
Chain pitch 8.255mm (0.325”)
Chain gauge 1.47mm (0.058”)
Sprocket 7 Teeth x 8.255mm
Volume of fuel tank 550ml (Fuel ratio: 40:1)
Volume of oil tank 260ml
Specic fuel consumption at
maximum engine power
850g/kWh
Type of chain and guide bar
18”
20”
KANGXIN BE18-72-5810P
KANGXIN BE20-76-5812P
Spark plug model L7T (LD)
Carburetor model BIG DINT/MC16-02
Mass(without guide bar and
chain and with empty tank)
5.0kg
Sound pressure/power lever
(According to ISO22868)
LpA: 93.72dB(A)/
LwA:113.72dB(A) K=2.5
dB(A)
Guaranteed sound power level,
LWA(2000/14/EC)
LwA: 117 dB(A)
Vibrations emission levels, m/s2
(According to ISO 22867)
Front handle 8.25m/s2
Rear handle 9.04m/s2
K=1.5 m/s2
Specications are subject to change without notice.

TT-CS4500 Engine Diagram
Engine Parts Diagram

TT-CS4500 Chainsaw Diagram
Chainsaw Main Parts Diagram

TTCS-A1 Inner Guide
TTCS-A2 Bolt M5*12
TTCS-A3 Insulator
TTCS-A4 Gasket, Insulator
TTCS-A5 Cylinder
TTCS-A6 Spark Plug
TTCS-A7 Bolt M5*20
TTCS-A8 Square Screw M5*85
TTCS-A9 Gasket, Mufer
TTCS-A10 Mufer
TTCS-A11 Mufer Cap
TTCS-A12 Nut M5
TTCS-A13 Gasket, Cylinder
TTCS-A14 Piston Ring
TTCS-A15 Piston
TTCS-A16 Snap Ring
TTCS-A17 Piston Pin
TTCS-A18 Washer
TTCS-A19 Needle Bearing
TTCS-A20 Crankshaft
TTCS-A21 Key
TTCS-A22 Coil
TTCS-A23 Ignition Coil
TTCS-A24 Hook
TTCS-A25 Gasket, Oil cap
TTCS-A26 Oil Cap
TTCS-A27 Bolt M5*30
TTCS-A28 Nut M8
TTCS-A29 Rotor
TTCS-A30 Bolt M5*12
TTCS-A31 Cover, Oil Seal
TTCS-A32 Oil Seal
TTCS-A33 Retainer Ring
TTCS-A34 Bearing
TTCS-A35 Anti-vibration, Left Crankcase
TTCS-A36 Left Crankcase
TTCS-A37 Stop Switch
TTCS-A38 Gasket, Crankcase
TTCS-A39 Pin
TTCS-A40 Dust-proof Rubber
TTCS-A41 Right Crankcase
TTCS-A42 Washer, Insulator Gasket
TTCS-A43 Insulator Gasket
TTCS-A44 Gasket, Insulator Gasket
TTCS-A45 Manifold
TTCS-A46 Carburettor
TTCS-A47 Throttle Pull Rod
TTCS-A48 Intake Manifold
TTCS-A49 Anti-vibration, Intake Manifold
TTCS-A50 Bolt M5*50
TTCS-A51 Screw Gm5-m5x30
TTCS-A52 Gasket, Air-lter
TTCS-A53 Air-lter
TTCS-A54 Bolt M4*14
TTCS-A55 Hook
TTCS-A56 Anti-vibration, Hook
TTCS-A57 Anti-vibration Set, Hook
TTCS-A58 Oil Seal
TTCS-A59 Cover,oil Pump
TTCS-A60 Bolt M4*12
TTCS-A61 Worm
TTCS-A62 Needle Bearing
TTCS-A63 Sprocket
TTCS-A64 Clutch Drum
TTCS-A65 Gasket,clutch
TTCS-A66 Clutch spring
TTCS-A67 Retainer
TTCS-A68 Clutch shoes
TTCS-A69 Bolt M4*14
TTCS-A70 Nozzle
TTCS-A71 Oil Pump
TTCS-A72 Dust-proof Rubber
TTCS-A73 Oil Pipe
TTCS-A74 Oil Filter
TTCS-A75 Plate
TTCS-A76 Guide
TTCS-A77 Screw Aym8-m8x28
TTCS-A78 Bumper Spike
TTCS-A79 Sponge Filter
TTCS-A80 Snap Ring
TTCS-A81 Went Mouth
TTCS-A82 Insulation Pipe
TTCS-A83 Negative Pipe
TTCS-A84 Nozzle Dip
TTCS-A85 Elbow
TTCS-B1 Engine
TTCS-B2 Air lter lock nut
TTCS-B3 Lock nut washer
TTCS-B4 Air lter cover
TTCS-B5 Top cover
TTCS-B6 Bolt M5*14
TTCS-B7 Chain catcher
TTCS-B8 Bolt ST5*16
TTCS-B9 Taper spring plate
TTCS-B10 Taper spring
TTCS-B11 Handle
TTCS-B12 Dust proof cover
TTCS-B13 Guiding cover
TTCS-B14 ∅5 at washer
TTCS-B15 Starter pulley
TTCS-B16 Spring cover
TTCS-B17 Starter handle
TTCS-B18 Spring
TTCS-B19 Washer
TTCS-B20 Starter rope
TTCS-B21 Starter cover
TTCS-B22 Long anti-vibration damper
TTCS-B23 Fuel tank cap
TTCS-B24 Fuel tank cap washer
TTCS-B25 Fuel tank cap clip
TTCS-B26 Fuel tank assembly
TTCS-B27 Throttle control arm
TTCS-B28 Trigger cover
TTCS-B29 Trigger
TTCS-B30 Trigger spring
TTCS-B31 Trigger pin
TTCS-B32 Balancer
TTCS-B33 Balancer seat
TTCS-B34 Fuel pipe
TTCS-B35 Fuel lter
TTCS-B36 Double-pin anti-vibration washer
TTCS-B37 Brake spring cover
TTCS-B38 Bolt ST4*8
TTCS-B39 Brake torsion spring
TTCS-B40 Washer ∅6 * ∅16* 0.8
TTCS-B41 ∅4 split washer
TTCS-B42 Damping rubber washer
TTCS-B43 Tensioner cover plate
TTCS-B44 Tensioner bolt
TTCS-B45 Tensioner lock nut
TTCS-B46 Tensioner clip
TTCS-B47 Chain guide
TTCS-B48 Brake belt
TTCS-B49 Oil bafe plate
TTCS-B50 Brake
TTCS-B51 M8 ange nut
TTCS-B52 Front guard pin cover
TTCS-B53 Front guard pin
TTCS-B54 ∅3 split washer
TTCS-B55 Front guard
TTCS-B56 Retainer
TTCS-B57 Washer ∅6 * ∅20* 1.2
TTCS-B58 Retainer pin
TTCS-B59 Big spring
TTCS-B60 Small spring
TTCS-B61 Control arm
TTCS-B62 Retainer ∅3*8
TTCS-B63 Negative leverage
TTCS-B64 Main leverage
TTCS-B65 Chain
TTCS-B66 Guide bar
TTCS-B67 Guide bar cover