Michigan Ravenger 1950 User manual

Ravenger 1950 Wood Chipper

User Manual

[Revision 4.0 July 2019]

READ THIS MANUAL CAREFULLY BEFORE USE – FAILURE TO DO SO MAY RESULT IN INJURY, PROPERTY

DAMAGE AND MAY VOID WARRANTY. • KEEP THIS MANUAL FOR FUTURE REFERENCE. • Products covered by

this manual may vary in appearance, assembly, inclusions, specifications, description and packaging.

The product is NOT supplied with engine oil, although traces of oil from the

manufacturing process may be present. It is essential to add adequate engine oil of the

correct type to the engine before use – see Checking and Changing Engine Oil.

Failure to add engine oil will void the product warranty.

Ravenger 1950 Wood Chipper and Shredder

Safety

Safety messages are designed to alert you to possible dangers or hazards that could cause death,

injury or equipment or property damage if not understood or followed. Safety messages have the

following symbols:

You WILL be KILLED or

SERIOUSLY INJURED if you do

not follow instructions.

You CAN be KILLED or

SERIOUSLY INJURED if you do

not follow instructions.

You CAN be INJURED if you do

not follow instructions or

equipment damage may occur.

It is important that you read and

understand the instruction manual before

use and keep the manual in a safe place

for future reference. Safety information

presented here is generic in nature – some

advice may not be applicable to every

piece of equipment. The term “equipment"

refers to your product, be it electrical

mains, battery or petrol engine powered.

Read all safety warnings and all

instructions. When using the equipment,

basic safety precautions detailed here

must always be followed to reduce the risk

of fire, electric shock, personal injury and

material damage.

IMPORTANT – Handle the equipment

safely and carefully.

BEFORE USE - If you are not familiar with

the safe operation/handling of the

equipment, or are in any way unsure of any

aspect of suitability or correct use it for

your application, you should complete

training conducted by a person or

organization qualified in safe use and

operation of this equipment, including

fuel/electrical handling and safety.

WARNINGS

•Read all safety warnings and all

instructions. When using the equipment,

basic safety precautions detailed here

must always be followed to reduce the

risk of fire, electric shock, personal injury

and material damage.

•Do not operate the equipment in

flammable or explosive environments,

such as in the presence of flammable

liquids, gases or dust. The equipment

may create sparks or heat that may

ignite vapors, dust etc

•Keep clear of moving parts.

•Equipment may be a potential source of

electric shock or injury if misused.

•Do not operate the equipment if it is

damaged, malfunctioning or is in an

excessively worn state.

•Do not allow others to use the

equipment unless they have read this

manual and are adequately trained.

General Work Area Safety

Work areas should be clean and well it.

Do not operate the equipment if

bystanders, animals etc are within

operating range of the equipment or the

general work area.

General Personal Safety

Keep packaging away from children - risk

of suffocation! Operators must use the

equipment correctly. When using the

equipment, consider conditions and pay

due care to persons and property.

Prevent unintentional starting of the

equipment - ensure equipment and power

source switches are in the OFF position

before connecting or moving the

equipment. Do not carry equipment with

hands/fingers touching any controls.

Remove any tools or other items that are

not a part of the equipment from it before

starting or switching on.

Stay alert and use common sense when

operating equipment. Do not overreach.

Keep proper footing and balance at all

times. Do not use equipment when tired or

under the influence of drugs, alcohol or

medication. This equipment is not intended

for use by persons with reduced physical,

sensory or mental capabilities.

You must wear appropriate protective

equipment when operating, servicing, or

when in the operating area of the

equipment to help protect from serious

injury, including eye injury, inhalation of

toxic fumes, burns, and hearing loss.

Always wear eye protection. Protective

equipment such as respirators, non-skid

safety shoes, hard hat, hearing protection

etc should be used for appropriate

conditions. Other people nearby should

also wear appropriate personal protective

equipment. Do not wear loose clothing or

jewellery, which can be caught in moving

parts. Keep hair and clothing away from

the equipment.

If devices are provided for the connection

of dust extraction and collection facilities,

ensure these are connected and properly

used. Use of dust collection can reduce

dust-related hazards.

General Equipment Use and Care

Do not force the equipment. Use the

correct equipment for your application. The

correct equipment will perform better and

be safer within its design parameters.

Do not use the equipment if the ON/OFF

switch malfunctions – any equipment that

cannot be controlled with the ON/OFF

switch is dangerous and must be repaired.

Use the equipment and accessories etc. in

accordance with these instructions, taking

into account working conditions and the

work to be performed. Using the equipment

for operations different from those intended

could result in hazardous situations.

Before use, inspect the equipment for

misalignment or binding of moving parts,

loose components, damage or any other

condition that may affect its operation. If

damaged, have the equipment repaired by

an authorized service centre or technician

before use.

Always keep the equipment and

accessories (cutting tools, nozzles, bits

etc) properly maintained. Keep the

equipment, controls and handles dry and

free from dirt, oil and grease.

Store the equipment out of reach of

children or untrained persons. To avoid

burns or fire hazards, let the equipment

cool completely before transporting or

storing. Never place the equipment in

places where there are flammable

materials, combustible gases or

combustible liquids etc.

The equipment is not weatherproof, and

should not be stored in direct sunlight, at

high ambient temperatures or locations

that are damp or very humid.

Chipper Use and Care

•The equipment should be operated by

responsible adults only, 18 years of age

and over.

•The equipment must be used on firm,

flat and level surfaces only.

•Maintain a safe working distance of at

least 15m (36') between the output chute

and any persons, animals or structures.

•Before each use, check the cutting blade

clearance and ensure that blade

fasteners are tight.

•Do not use the equipment for purposes it

is not designed for.

•Do not attempt to chip or shred

branches bigger then 120mm diameter.

•Branches greater than 30mm diameter

that are growing out of a branch being

chipped should be cut off and chipped

separately.

•For roots, always remove any attached

dirt, stones etc before chipping.

•Do not attempt to chip or shred any

material other than suitable wood types.

•Do not attempt to remove materials from

the machine or attempt to un-jam it while

the machine is running.

•Do not use the machine in confined

areas where ventilation or space around

the machine is limited.

•After stopping the engine, always allow

all moving components (blades etc) to

Ravenger 1950 Wood Chipper and Shredder

stop moving before moving, lifting etc.

General Fuel Safety

Petrol/fuel/gasoline is extremely

flammable – keep clear of

naked flames or other ignition

sources.

•Do not spill fuel. If you spill fuel, wipe it

from equipment immediately – if fuel

gets on your clothing, change them

immediately

•Do not smoke near fuel.

•Always shut off the engine before

refuelling.

•Do not refuel a hot engine.

•Open the fuel cap carefully to allow any

pressure build-up in the tank to release

slowly.

•Always refuel in well ventilated areas.

•Always check for fuel leakage. If fuel

leakage is found, do not start or run the

engine until all leaks are fixed.

General Electrical Safety

•Inspect electrical equipment, extension

cords, power bars, and electrical fittings

for damage or wear before each use.

Repair or replace damaged equipment

immediately.

•Ensure all power sources conform to

equipment voltage requirements and are

disconnected before connecting or

disconnecting equipment.

•When wiring electrically powered

equipment, follow all electrical and

safety codes.

•Wherever possible, use a residual

current device (RCD).

•Electrically grounded equipment must

have an approved cord and plug and be

connected to a grounded outlet.

•Do not bypass the on/off switch and

operate equipment by connecting and

disconnecting the power cord.

•Do not use equipment that has exposed

wiring, damaged switches, covers or

guards.

•Do not use electrical equipment in wet

conditions or damp locations.

•Do not use electrical cords to lift, move

or carry equipment.

•Do not tie electrical cords in tight knots

and ensure electrical cords do not

present trip hazards.

General Service Information

•Have the equipment serviced or repaired

at authorized service centers by

qualified personnel only.

•Replacement parts must be original

equipment manufacturer (OEM) to help

ensure that equipment safety is

maintained.

•Do not attempt any maintenance or

repair work not described in this

instruction manual.

•After use, the equipment and

components may still be hot – allow the

equipment to cool and disconnect spark

plugs and/or electrical power sources

and/or batteries from it before making

adjustments, changing accessories or

performing repair or maintenance.

•Do not make adjustments while the

equipment is running.

•Perform all service related activities

under suitable conditions, such as a

workshop etc.

•Replace worn, damaged or missing

warning/safety labels immediately.

•Do not clean equipment with solvents,

flammable liquids or harsh abrasives.

DANGER

Running petrol engines in confined areas CAN

KILL IN MINUTES. Engine exhaust fumes

contain carbon-monoxide – a deadly gas that you

cannot smell or see.

NEVER run a petrol engine in confined areas

EVEN IF windows and doors are open. ONLY run

petrol engines OUTDOORS and away from

doors, windows and vents.

Do not operate the equipment in hazardous locations,

such as where there may be a risk of fire or explosions

from flammable liquids, gases or dust.

Do not operate the equipment in confined areas where

exhaust gases, smoke or fumes could reach dangerous

concentrations.

Do not refuel petrol engines while they are running.

Never smoke while refuelling petrol engines.

For generators, the electrical output is potentially lethal

and must only be connected to a fixed electrical

installation by an appropriately licensed person.

Be aware that the equipment may include hazardous

components, such as blades, hot surfaces and moving

parts.

Ravenger 1950 Wood Chipper and Shredder

Table of Contents

Safety.............................................................................................................................................2

Parts Identification........................................................................................................................ 5

Before Use Checklist ....................................................................................................................6

Assembly......................................................................................................................................................6

4-Stroke Engine Oil ......................................................................................................................................8

Air Filter ........................................................................................................................................................8

Fuel ..............................................................................................................................................................8

Spark Plug....................................................................................................................................................9

Engine Starting and Stopping.................................................................................................... 10

Environmental Considerations .................................................................................................................. 11

Altitude ................................................................................................................................................ 11

Temperature ....................................................................................................................................... 11

Operation.....................................................................................................................................12

Chipping and Shredding............................................................................................................................ 12

Clearing Jammed Blades ................................................................................................................... 12

Adjusting the Output Flap ................................................................................................................... 13

Maintenance ................................................................................................................................ 14

Maintenance Schedule.............................................................................................................................. 14

Checking and Changing Engine Oil .......................................................................................................... 15

Checking, Cleaning or Replacing the Air Filter ......................................................................................... 16

Air Filter Inspection and Cleaning....................................................................................................... 16

Spark Plug................................................................................................................................................. 18

Spark Plug Cleaning and Gap Checking ............................................................................................ 18

Spark Plug Removal/Installation......................................................................................................... 18

Blades ....................................................................................................................................................... 19

Clearance Checking ........................................................................................................................... 19

Blade Removal/Installation ................................................................................................................. 20

Blade Shaft Lubrication ...................................................................................................................... 20

Drive Belts ................................................................................................................................................. 20

Belt Tension Adjustment..................................................................................................................... 21

Belt Removal/Installation .................................................................................................................... 22

Throttle Limiter Adjustment ....................................................................................................................... 22

Cleaning Guidelines .................................................................................................................................. 23

Transportation and Storage ....................................................................................................... 23

Troubleshooting.......................................................................................................................... 24

Specifications ............................................................................................................................. 26

Service and Maintenance Record .............................................................................................. 27

Ravenger 1950 Wood Chipper and Shredder

Parts Identification

Wood chippers come with all parts required for normal use. A basic toolkit may also be included. It is

strongly recommended that you familiarise yourself with all major components of the machine before

using it or performing any maintenance tasks.

No. Name No. Name

1

Frame

11

Starting Cord

2

Input Chute

12

Throttle Control

3

Output Chute

13

Air Filter Cover (filter inside)

4 Drive Belt Cover 14 Fuel Tank and Cap

5

Towing Arm

15

Engine ON / OFF Switch

6 Wheel (2) 16 Fuel Tap

7

Handle

17

Choke

8

Engine Emergency Stop Button

18

Drive Belt Tensioner (not visible)

9

Blade Shaft Access

19

Output Chute Flap

10

Spark Plug (not visible)

1

2

3

4

5

6

8

7

9

11

16

17

13

12

14

15

19

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Ravenger 1950 Wood Chipper and Shredder

Before Use Checklist

Ensure that you carry out all procedures below before starting the engine or operating

the equipment. Failure to follow the checklist and carry out the procedures

correctly may result in making the product warranty void. The product is NOT

supplied with engine oil, although traces of oil from the manufacturing process may be present. It is

essential to add adequate engine oil of the correct type to the engine before use – see Checking and

Changing Engine Oil. Failure to add engine oil will void the product warranty.

Assembly

Typically, the chipper requires minimal assembly. Prior to assembly, unpack all components and check

that all items have been received. Assembly requires 2 or more persons. Some tools, such as suitable

spanners, are required for assembly.

No. Name No. Name

1

Frame

10

Handle Locking Pin (2)

2

Input Chute

11

Towing Arm Locking Pin (2)

3

Output Chute

12

R-Clip (2)

4

Towing Arm

13

Inner Wheel Washer (2)

5 Wheel (2) 14 Outer Wheel Washer (2)

6 Handle 15 Fasteners: M10 Nut (6), M10 x 50 Bolt (4), M10 x

45 Bolt (2), M10 Washer (12), M8 x 25 Bolt (2),

M8 x 20 Bolt (4), M8 Spring Washer (6), M8

Washer (4), M6 x 15 Bolt (2), M6 Nut (2)

7

Handle Chock (2)

8 Axle

9 Wheel Spacer (2)

1

5

7

2

3

4

6

8

9

10

12

11

13

14

15

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Ravenger 1950 Wood Chipper and Shredder

Wheels

1. With the machine frame jacked off the ground safely

and sufficiently to get the wheels on, slide the axle

through the axle mounts (A) on the bottom of the

frame.

2. Place a wheel spacer (B), followed by an inner

wheel washer (C) onto each end of the axle.

3. Place a wheel (D) onto each end of the axle.

4. Place an outer wheel washer (E) over the end of the axle and secure using an M8 spring washer

(F) and M8 x 20 bolt (G). The centre of the axle has "flats" so that a spanner can be used to prevent

the axle rotating when tightening the wheel bolts. Firmly tighten (rotate right) the bolts.

Input and Output Chute

5. Place the input chute (A) in position on the frame (above the cutting blades) and slide it across so

that the locating pins (B) in the chute engage with the hinges (C) on the frame.

6. Secure the underside lip of the input chute to the machine frame using 2 M8 x 25 bolts (D), M8

washers (E) and M8 spring washers (F). Firmly tighten (rotate right) the bolts.

7. Place the output chute (G) in position on the frame (at rear of machine) and slide it across so that

the locating pins in the chute engage with the hinges on the frame.

8. Secure the rear lip of the output chute to the machine frame using 2 M8 x 20 bolts (H), M8 washers

(E) and M8 spring washers (F). Firmly tighten (rotate right) the

bolts.

Handle

9. Insert a handle chock (A) into the end of the frame (B)

at the front of the machine. Insert the chock so that

the "fingers" protrude from the end of the frame.

10. Secure each chock to the frame using 2 M10 x 50

bolts (C), 4 M10 washers (D) and 2 M10 nuts (E).

Firmly tighten (rotate right) the bolts.

11. Bring the flat sections at the ends of the handle (F) in

position between the chock "fingers". Secure each

end of the handle at the end hole using a M10 x 45

bolt (G), 2 M10 washers (D) and a M10 nut (E). Firmly

tighten (rotate right) the bolts.

12. Use a handle locking pin (H) through each remaining handle

attachment hole to fully secure the handle.

Towing Arm

13. Insert the end of the towing arm (A) into the frame tube (B) at the

rear of the machine.

A

B

C

D

E

F

G

A

B

C

E

F

D

E

F

H

G

A

B

F

H

C

D

E

D

E

G

C

B

A

D

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Ravenger 1950 Wood Chipper and Shredder

14. Insert a towing arm locking pin (C) through the frame and handle and secure the pin using an R-clip

(D). A locking pin and clip is also supplied for securing the other end of the towing arm.

Check Cutting Blades

The cutting system features a fixed blade that is attached to the machine and a spinning rotor that has

2 blades. For safe and correct operation, the clearance between the fixed blade and rotor blades must

be correct and all blade fasteners are tight. Before using the machine:

•Check that the cutting blade clearance is between 0.5 and 1.5mm.

•Check that the cutting blade fasteners are secure.

After the first hour of use, re-check the blades.

4-Stroke Engine Oil

The product is NOT supplied with engine oil, although traces of oil from the

manufacturing process may be present. It is essential to add adequate engine oil of the

correct type to the engine before use – see Checking and Changing Engine Oil. Failure to add engine

oil will void the product warranty.

Four-stroke engines require engine oil in the crankcase for lubrication of internal components. Severe

or irreparable damage may occur if the engine is allowed to run without engine oil. The engine oil level

requires regular maintenance. Check the engine oil level and ensure that the oil level is at or just under

the maximum level indicator.

Always check the engine oil level before starting the engine. See Checking and Changing Engine Oil.

Air Filter

The air filter is used to prevent dirt and other particles from possibly entering the engine and causing

internal damage to it. The air filter requires regular maintenance.

Always check the air filter before starting the engine. See Checking, Cleaning and Replacing the Air

Filter.

Fuel

Petrol/fuel/gasoline is extremely flammable – keep clear of naked flames or other

ignition sources. • The engine must be cool before refuelling.

Adequately fill the fuel tank with the correct fuel type.

•For 4-stroke engines, use non-ethanol unleaded petrol (higher RON values will provide best engine

performance). Do not use old or contaminated fuel.

To fill or top up fuel:

1. Place the machine in an upright position on a flat and level surface.

2. Clean the machine around the fuel filler so that no dirt or other material enters the engine when the

cap is removed.

3. Remove (rotate left) the fuel filler cap.

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Ravenger 1950 Wood Chipper and Shredder

4. Using a funnel, carefully fill the tank with fuel. Do not fill above the top of the strainer (if equipped) or

otherwise overfill the tank.

5. When finished, re-install (rotate right) the fuel filler cap until firm. Wipe away any residual fuel from

the machine. If fuel has been spilt, move the machine away from the spillage before starting the

engine.

Spark Plug

The spark plug may come disconnected from the spark plug lead. If this is the case, place the electrical

lead over the spark plug terminal and push it down so that it connects firmly with the terminal. See

Spark Plug Removal/Installation.

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Ravenger 1950 Wood Chipper and Shredder

Engine Starting and Stopping

Before starting the engine, ensure that you have followed all procedures described in

the Before Use Checklist. The product is NOT supplied with engine oil, although traces

of oil from the manufacturing process may be present. It is essential to add adequate

engine oil of the correct type to the engine before use – see Checking and Changing Engine Oil.

Failure to add engine oil will void the product warranty.

Major engine controls are identified on the machine by stickers or other markings. To start the engine:

1. FUEL – Place the fuel tap (A) in the "ON" position. If

necessary, “prime” the fuel system by gently pulling the

starter cord 4 to 8 times. Priming is required when

starting the engine for the first time or after the machine

has used all fuel and the carburettor is now "dry".

2. CHOKE and Throttle – If the engine is cold, place the

choke (B) in the "COLD" or "START" position. If the

engine is warm or the ambient temperature is high, place

the choke in the "HOT" or "RUN" position. Place the

throttle control (C) just off the "tortoise" (slow) position.

3. IGNITION – Place the engine ON/OFF switch (D) in the

“ON” (“I”) position. Ensure that the emergency stop button

is not engaged.

4. START – Slowly pull out the starter cord (E) until you feel

it engage with the engine, then pull it out rapidly. The

engine should start. Allow the starter cord to rewind

slowly – do not let it “snap” back.

5. WARM-UP and THROTTLE – It is good practice to allow

the engine to warm-up and run smoothly before using the

machine. Use the throttle control to set the desired

engine speed once the engine is warm. Move the throttle

control (C) towards the "rabbit" to increase speed, and towards the "tortoise" to reduce speed. If the

throttle does not allow the engine to run at a high enough speed, the throttle limiting screw may

need to be adjusted.

If the engine does not start, repeat step 4. If the engine fails to start after

several attempts, refer to Troubleshooting.

To stop the engine:

•Place the engine ON/OFF switch (D) in the “OFF” position or press the

emergency engine stop button (F). If the engine is stopped using the

emergency stop button, reset the button by rotating it right until it "pops"

up. The button must be reset in order to start the engine again.

A

B

C

D

E

F

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Ravenger 1950 Wood Chipper and Shredder

Environmental Considerations

Altitude

If the engine is being used in altitudes at or above 1500m (approximately 5000’), adjustments to the

carburettor may be required. This is because there is less oxygen in the air as altitude increases, which

effectively “enriches” the ratio of fuel to air going into the engine and the higher the altitude, the richer

the fuel mixture becomes. If the engine is being permanently operated at high altitude, it is

recommended to have an authorized service centre make the necessary carburettor adjustments. If the

engine is used occasionally at altitude (not extreme altitudes), no adjustments should be required,

however, a slight decrease in engine performance can be

expected.

Temperature

If the engine is being used in extremely cold or hot

environments; for example, desert or snow conditions, the type

of engine oil may need to be changed to suit environmental

temperatures. Oil thickens as the temperature decreases and

thins as temperature increases, which means that if the engine oil is not suited to the temperature its

ability to properly lubricate the engine may be affected. Use the following chart to determine the correct

engine oil:

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Ravenger 1950 Wood Chipper and Shredder

Operation

The product is NOT supplied with engine oil, although traces of oil from the

manufacturing process may be present. It is essential to add adequate engine

oil of the correct type to the engine before use – see Checking and Changing

Engine Oil. Failure to add engine oil will void the product warranty. • Always wear suitable

protective clothing and equipment when using the machine. • Inspect the machine before each use and

check for wear or damage. If the machine is damaged, have it inspected and repaired at an authorized

service centre before using it again. • If you experience excessive vibration or noise or noticeably

reduced performance from the machine during operation, this is an indication of possible wear or

damage. It is recommended to have it inspected and repaired at an authorized service centre before

using it again. • Be aware that once the engine is running, the cutting blades will be rotating and parts of

the machine may be extremely hot. • Ensure that the machine stands firmly on the ground and is not

tilted in any way or otherwise unstable. • In order to avoid serious injury or damage by chips thrown

from the output chute, onlookers, animals and structures should be at least 15m (36') away from the

output chute (debris can be thrown up to 12m from the machine).

Chipping and Shredding

Do NOT overload the machine by feeding overly large material into it, or at a rate that

creates unnecessary loads. For some wood types that are particularly hard, you may

have to reduce the size of the material being chipped. • Never hold on to material as it is being drawn

into the machine – always release the material. • Do not attempt to chip or shred tough fibrous plant

material such as flax or vines. • When chipping material large material, process one branch at a time. •

Do NOT force material into the chipper. • Do not attempt to chip or shred branches bigger than 120mm

diameter. • Branches greater than 30mm diameter that are growing out of a branch being chipped

should be cut off and chipped separately. • For roots, always remove any attached dirt, stones etc

before chipping. • Do not attempt to chip or shred any material other than suitable wood types. • Do not

attempt to remove materials from the machine or attempt to un-jam it while the machine is running.

1. Ensure that the input and output chutes are properly attached and free of obstructions.

2. Start the engine, allow it to warm up, then run at full speed.

3. Drop or feed the material to be chipped into the input chute. There is no need to "push" it in – once

the material makes contact with the blades it will be pulled into the machine.

4. When finished, stop the engine, turn off the fuel tap etc. Wait until the machine completely stops

before moving, cleaning the machine etc

Clearing Jammed Blades

It is possible that the machine blades become jammed. This is usually

caused by attempting chip material that is too large. To clear jammed

material:

1. Stop the engine immediately.

2. Pull the spark plug lead from the spark plug to prevent

accidentally starting the engine or ignition from possibly

occurring.

3. Remove the input and output chutes and ensure that the

chutes are free of obstructions.

B

A

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Ravenger 1950 Wood Chipper and Shredder

4. Remove the 2 bolts (A) securing the blade shaft access cover (B) and remove the cover – this

allows access to the blade shaft so you can rotate the blades

5. Using a suitable spanner on the end of the blade shaft, rotate the shaft as required.

6. Using suitable tools or objects, remove any obstructions, non-chippable material etc from the

blades.

7. Ensure the blades can rotate fully before re-assembling the machine and using it again.

Adjusting the Output Flap

The output chute has an adjustable flap that can be used to help

direct where chippings will fall. To adjust:

1. loosen (rotate left) the thumb-screw (A).

2. Rotate the flap (B) as required – the higher it is, the further

away the chippings will fall.

3. Firmly tighten the thumb-screw by hand.

B

A

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Ravenger 1950 Wood Chipper and Shredder

Maintenance

Running petrol engines in confined areas CAN KILL IN MINUTES. Engine

exhaust fumes contain carbon-monoxide – a deadly gas that you cannot smell or

see. NEVER run a petrol engine in confined areas EVEN IF windows and doors

are open. ONLY run petrol engines OUTDOORS and away from doors, windows and vents. •

Petrol/fuel/gasoline is extremely flammable – keep clear of naked flames or other ignition sources. The

product is NOT supplied with engine oil, although traces of oil from the manufacturing process may be

present. It is essential to add adequate engine oil of the correct type to the engine before use – see

Checking and Changing Engine Oil. Failure to add engine oil will void the product warranty.• Do

not have the engine running during inspection and maintenance unless specifically required. • The

engine should be cool enough to touch before performing maintenance activities. • Some maintenance

activities described may be beyond the scope of some users. For procedures that you are not

comfortable with or have the tools or experience for, have the unit serviced by a service centre or

qualified technician.

To keep the equipment performing at optimal efficiency, regular checks and maintenance is required.

Proper care and maintenance ensures best performance and longest service life.

The maintenance schedule below specifies preventative maintenance checks and necessary

maintenance tasks and how often they should be performed.

Harsh operating environments such as extreme temperatures, dust etc may necessitate more

frequent maintenance. • Maintenance frequencies are based on general factors including a

maximum use of approximately 300 hours per year. Apply common-sense when following the

maintenance schedule based on your actual use of the product. • Keep reasonable records of

maintenance activities for reference. Failure to follow the maintenance schedule, using incorrect or

non-compatible accessories or replacements parts, or general negligence may result in making

the product warranty void.

Maintenance Schedule

Frequency – Whichever Comes First

Component/Task Every Use

First Month or

20 Hours Use

Every 3 Months

or 50 Hours Use

Every 6 Months or

100 Hours Use

Every Year or

300 Hours Use

Engine Oil Check Replace Replace

Oil Leaks Check/repair as

necessary

Air Cleaner Check Clean and replace as necessary

Spark Plug Check Replace

Valve Clearance Adjust as

necessary

Combustion

Chamber De-coke as

necessary

Idle Speed Check/adjust as

necessary

Fasteners Check/tighten

as necessary

Fuel Tank Flush and clean

Fuel Line Replace as necessary

Fuel Filter Clean and replace as necessary

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Ravenger 1950 Wood Chipper and Shredder

Frequency – Whichever Comes First

Component/Task Every Use

First Month or

20 Hours Use

Every 3 Months

or 50 Hours Use

Every 6 Months or

100 Hours Use

Every Year or

300 Hours Use

Fuel Strainer Check

Blade Shaft Lubricate

Drive Belt Check/adjust as

necessary

Checking and Changing Engine Oil

The product is NOT supplied with engine oil, although traces of oil from the

manufacturing process may be present. It is essential to add adequate engine oil of the

correct type to the engine before use. Failure to add engine oil will void the product warranty. •

Always check engine oil level when the machine is in an upright position on a flat and level surface. •

Do not use used or contaminated engine oils. • Use only engine oils of the correct type (see

Specifications). • Perform the first oil change within the first 20 hours of use. Subsequently, change the

oil every 20 hours of use. • It is recommended that the engine be warm, but not hot, when performing oil

changes. When the oil is warm it drains faster. • Using dirty or incorrect engine oil may cause engine

damage and void any warranty • Always use suitable tools. • Always dispose of used oil in an

environmentally responsible manner and according to regulations.

Four-stroke engines require engine oil in the crankcase for lubrication of internal components. Severe

or irreparable damage may occur if the engine is allowed to run without engine oil. The engine oil level

requires regular maintenance as per the maintenance schedule.

To check engine oil level:

1. Place the machine in an upright position on a flat and level

surface.

2. Clean the machine around the oil filler cap (A) so that no dirt or

other material enters the engine when the cap is removed.

3. Remove the oil filler cap (rotate left) until fully unscrewed. For

machines without a dipstick, the oil level is determined by how

close the oil is to the filler hole (B). The lower limit is indicated by

(X), the upper limit by (Y). For machines equipped with an oil level

dipstick:

a. Wipe the dipstick (C) clean with a piece of cloth or paper.

b. Insert the dipstick into the oil filler but do not screw it in.

c. Remove and inspect the dipstick – the oil level is determined

by where oil can be seen on it.

4. Ensure that the oil level is at or just under the permissible maximum. If the oil level is low, add

additional oil until the correct level is reached. If the oil level is too high, drain some oil until the

correct level is reached.

5. When finished, reinstall (rotate right) the oil filler cap until firm. Wipe off any residual oil from the

machine.

To change the engine oil:

A

Y

X

B

C

D

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Ravenger 1950 Wood Chipper and Shredder

1. Place the machine on a suitable work surface that is flat and level and have a container ready to

catch drained oil.

2. Clean the machine around the oil drain plug (D) and oil filler (A) so that no dirt or other material

enters the engine when the plug or cap is removed.

3. Unscrew (rotate left) and remove the drain plug and washer.

4. Tilt the machine and drain all oil from the engine. Once drained, allow the machine to sit level again.

5. Clean the drain plug and washer and then reinstall them. Screw in fully (rotate right) and firmly

tighten.

6. Remove the oil filler cap (rotate left) until fully unscrewed. Wipe the oil level indicator clean with a

piece of cloth or paper.

7. Using a funnel, carefully add oil to the engine until the permissible maximum is reached. Double-

check the oil level (described above).

8. When finished, reinstall (rotate right) the oil filler cap until firm. Wipe off any residual oil from the

machine.

Checking, Cleaning or Replacing the Air Filter

Operating the machine without a functional air filter may cause severe engine damage and will

void any warranty. • A dirty or oil saturated air filter will restrict air flow, which can be mistaken

as fuel system problems. Check the condition of the air filter before adjusting engine idle speed, where

applicable. • If the air filter is damaged (torn, broken, disintegrating), replace it.

The air filter is used to prevent dirt and other particles from possibly entering the engine and causing

internal damage to it. The air filter requires regular maintenance as per the maintenance schedule.

Air Filter Inspection and Cleaning

Inspect the air filter for dirtiness and debris, damage etc. Clean or replace the filter element as

necessary. To clean air filters:

•For foam filters, wash the filter in warm water and mild detergent, then rinse and allow to dry.

•For paper filters, use compressed air to blow particles from it, if possible. The air should be blown

from the engine side of the filter. Tapping the filter element against a hard surface and brushing the

pleats using a soft brush may also help remove debris from the filter.

•For foam filters, place a few drops of clean engine oil on the filter then squeeze it a few times to

spread the oil through the filter material and remove any excess oil.

•It is recommended to clean the air filter cover and air intake assembly of any dirt, cuttings etc.

To remove the air filter:

1. Remove (rotate left) the wing-nut (A) securing the air filter cover (B), then remove the cover from

the air intake assembly.

2. Remove (rotate left) the wing-nut (C) securing the air filter element (D), then remove the filter

element from the air intake assembly.

To install the air filter:

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Ravenger 1950 Wood Chipper and Shredder

1. Insert the air filter element, and ensure it is correctly positioned in relation to the air intake assembly

as it will seat and seal properly in one position only. Secure the air filter element with the wing-nut

(rotate right and tighten by hand. Do not over-tighten).

2. Re-install the filter cover, ensuring it is fitted properly against the engine and secure it with the wing-

nut (rotate right and tighten by hand. Do not over-tighten).

A

B

C

D

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Ravenger 1950 Wood Chipper and Shredder

Spark Plug

If the spark plug is damaged (cracked insulator, broken or eroded electrodes etc), replace it. •

Always use spark plugs of the correct “heat range” - see Specifications.

The spark plug is used to ignite the air/fuel mixture inside the engine. The spark plug has electrodes on

one end and an electrical terminal on the other. The spark plug requires regular maintenance.

Spark Plug Cleaning and Gap Checking

The spark plug should be checked and cleaned as per the maintenance

schedule.

1. Remove any carbon deposits on the spark plug (A) electrodes (B) with a

wire brush.

2. Clean the spark plug threads and the electrical terminal (C) on the top.

To check and adjust the spark plug “gap”:

1. Use “feeler” or “thickness” gauges (X) to measure the existing gap. The

gauge must drag a little when being slid between the electrodes (B) – this

means the measurement is fairly accurate.

2. Adjust the gap to within specification (see Specifications). If the gap needs to be reduced, gently tap

the electrode as required. If the gap needs to be increased, use pliers to gently pull the electrode as

required.

3. Measure the gap again and ensure it is within the specified range before re-installing the spark

plug.

Spark Plug Removal/Installation

1. Pull the electrical lead (A) from the terminal on top of

the spark plug. The spark plug is located below and

between the air filter and exhaust cases.

2. Clean the area around the spark plug so that no dirt or

other material can enter the engine when the spark

plug is removed.

3. Use the spark plug tool to remove the spark plug

(rotate left).

To re-install the spark plug:

1. Place the spark plug in its hole and screw it in (rotate right) until “finger tight”.

2. Use the spark plug tool to tighten the spark plug approximately one quarter turn (do not over-

tighten).

3. Place the electrical lead over the spark plug terminal and push it down so that it connects firmly

terminal.

A

B

X

C

A

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Ravenger 1950 Wood Chipper and Shredder

Blades

If a blade is damaged (cracked etc), replace it. • Ensure that blades are kept in good condition

and correct clearance is maintained - see Specifications. • Ensure that all bolts securing the

blades are firmly tightened – check them regularly. • Always handle blades with protective gloves on.

The machine uses 3 blades – 1 fixed blade (A) that is bolted to the machine body, and 2 blades (B) that

are mounted to a rotating shaft. The blades require regular maintenance.

1. Remove the 2 bolts (C) securing the blade shaft access cover (D) and remove the cover – this

allows access to the blade shaft so you can rotate the blades.

2. Using a suitable spanner on the end of the blade

shaft, rotate the shaft as required.

Clearance Checking

The blade clearance should be regularly checked. Incorrect blade

clearance will affect machine performance.

1. Remove the input chute from the machine.

2. Clean away any chippings, dirt etc from the blades.

To check and adjust the blade clearance:

1. Use “feeler” or “thickness” gauges to measure the existing gap (X). The gauge must drag a little

when being slid between the blades – this means the measurement is fairly accurate.

2. If the blade requires adjusting, loosen (rotate left) the blade bolts (E) just enough to allow the blade

to be moved – do not remove the bolts. Adjust the clearance to within specification (see

Specifications). If the clearance needs to be reduced, gently move the blade towards the fixed

blade as required. If the clearance needs to be increased, gently move the blade away from the

fixed blade as required.

3. Measure the clearance again and ensure it is within the specified range before tightening the blade

bolts.

Repeat the above procedure for the other blade.

A

B

X

E

D

C

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Ravenger 1950 Wood Chipper and Shredder

Blade Removal/Installation

The blades can be removed from the machine in order to be sharpened or replaced. Note that the

blades may have 2 cutting edges that allows you to switch the blade around to use the other cutting

edge.

1. Remove (rotate left) all bolts securing the blade to be removed. The bolts for the fixed blade can be

accessed from underneath.

2. Carefully remove the blade. When sharpening, use a suitable grinder and remove as little material

as possible from the blade.

To re-install blades:

1. Clean the blade and ensure that the bolt holes in the machine are clean.

2. Place the blade in position and screw in (rotate right) all blade bolts until “finger tight”.

3. Check blade clearance and adjust if required.

4. Firmly tighten all blade bolts.

Blade Shaft Lubrication

The blade shaft bearings must be lubricated according to the maintenance

schedule. The shaft bearing housing (A) on either side of the machine

features a grease nipple (B). A grease gun and grease is required – normal

automotive wheel bearing grease is suitable. Attach the grease gun hose to

the nipple and inject one squeeze of grease. Always lubricate both shaft

bearings.

Drive Belts

If a drive belt is damaged (cracked, breaking, torn etc), have it replaced. • Ensure that drive belt

tension is maintained - see Specifications.

The machine uses 2 "V" profile belts to rotate the blade shaft. The belts use friction against the belt

pulleys to provide drive. If the belts are adjusted incorrectly, or are worn, slippage may occur – this is

usually noticeable by a "squealing" noise and/or slowing or stopping of the blades when the machine is

under load. The belts require maintenance only when necessary.

B

A

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MICHIGAN Ravenger 1950 User manual

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