FORST ST6 D42 Manuel

12-M-001 Revision 1.1

Operation & Maintenance Manual

English

Page 2

Redwood Global Ltd,

Unit 86, Livingstone Road, Walworth Business Park, Andover,

Hampshire. SP10 5NS. United Kingdom

 
 
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Contents 
0 Introduction ..........................................................................................................5 
1 Purpose of Chipper...........................................................................................6 
2 Exterior Components ........................................................................................7 
0 Safety...................................................................................................................9 
1 Safety Working..................................................................................................9 
2 DO’s and DON’Ts ...........................................................................................10 
3 Noise Test Information....................................................................................11 
0 Transportation & Storage...................................................................................12 
1 Towing the Chipper.........................................................................................12 
2 Attaching and Detaching the Chipper .............................................................12 
2 Lifting the Chipper...........................................................................................13 
3 Storage of the Chipper....................................................................................13 
0 Chipper Operation..............................................................................................14 
1 Control Panel & Ignition ..................................................................................15 
2 Feed Speed Adjustment..................................................................................18 
3 Emergency Stopping.......................................................................................19 
4 Feed Jam & Blockages...................................................................................20 
0 Routine Maintenance .........................................................................................21 
1 Debris Screen.................................................................................................22 
2 Engine Maintenance .......................................................................................22 
3 Fastener tightening torques ............................................................................22 
4 Service Schedule............................................................................................23 
5 Chipper Diagrams...........................................................................................24 
6 Blade Changing ..............................................................................................26 
7 Blade Sharpening ...........................................................................................27 
8 Hydraulic Oil Filter...........................................................................................28 
6.1 Removal and Replacement......................................................................28 
9 Oils, Fluids and Lubricants..............................................................................29 
10 Drive belt tension ..........................................................................................30 
11 Battery...........................................................................................................31 
0 Parts Lists & Diagrams.......................................................................................34 
1 Tray & Stop Bar ..............................................................................................34 
3 Top feed roller assembly.................................................................................36 
4 Flywheel Assembly .........................................................................................37 

 
 
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5 Bottom Feed Roller.........................................................................................38 
6 Anvil................................................................................................................39 
7 Stone Trap......................................................................................................40 
8 Belt Tensioner assembly.................................................................................41 
9 Safety Curtain.................................................................................................42 
10 Chute Assembly............................................................................................43 
11 Fuel tank assembly.......................................................................................44 
12 Light board assembly....................................................................................45 
13 Running gear –hitch & axle..........................................................................46 
14 Hydraulics circuit diagram.............................................................................46 
15 Electrical Circuit Diagrams............................................................................47 
16 Decals...........................................................................................................48 
17 Manufacturer’s Statutory Plate......................................................................49 
18 Vehicle Identification Number (VIN) Plate.....................................................50 
0 Warranty and Certification..................................................................................51 
1 Warranty .........................................................................................................51 
2 Certification.....................................................................................................52 
 
 

Page 5

1.0 Introduction

Thank you for becoming the owner of this Redwood Global Ltd, Först ST6D wood

chipping machine. By observing the contents of this manual, we hope the chipper

gives safe and productive service. This user manual is intended for the

owner/operator to safely and effectively operate this chipper and carry out routine

maintenance between services. This is not a comprehensive service manual. See

Service Schedule for routine maintenance and when to take the chipper to a service

specialist. For engine maintenance, please refer to the engine manual supplied with

this chipper.

This chipper has been through a pre-delivery inspection before leaving the factory

and is ready to use.

Also, damage to property and this chipper may occur. Please observe and obey all

warning signs (decals) located on the chipper. Their meaning is covered in this

manual under decals.

All personnel working with this chipper must be adequately trained in its use and

most importantly, follow the advice on safe working practices.

Redwood Global Ltd endeavour to continuously develop and improve its products.

They reserve the right to make changes at any time, without notice or incurring any

obligation.

Continuous improvement will affect chipper design and production so there may be

minor discrepancies between the actual product and this manual.

This manual must remain with the chipper for reference by operators and includes

hiring or if the chipper is resold.

Before use and as a minimum, the safety and chipper operation

sections covered in Chapter 2 be read and understood. Failure to

do so could result in serious injury or loss of life to the operator

and others nearby.

Page 6

1.1 Purpose of Chipper

The Först ST6D is designed to reduce wood material up to 150mm diameter to

woodchip. This chipper is capable of processing up to 5 tonnes of wood per hour.

Twin hydraulic motors

150mm

30 litres

17 litres

5 tonnes/hour

EN590 Diesel

Roller Feed

Max. material diameter

Fuel Capacity

Hydraulic Oil Capacity

Material processing

Fuel type

Doosan D18

31kW (42hp)

Water Cooled

1165kg

Electric

Engine

Max. power

Cooling

Kerb weight

Starting

Page 7

1.2 Exterior Components

1. Feed touch sensors

2. Fuel tank

3. Prop stand

4. Control valve speed adjust

5. Control panel

6. Bonnet latch

7. Bonnet

8. Statutory plate & VIN

9. Light socket

10.Breakaway cable

11.Handbrake

12.Tow hitch

13.Jockey wheel handle

14.Lifting point

15.Chute rotation clamp

16.Chute handle clamp

17.Chute hood

Page 8

1. Spare wheel

2. Document box

3. Hopper

4. Battery

5. Number plate

6. Feed touch sensors

7. Stop bar

8. Hopper tray

9. Safety curtain

10.Emergency stop

11.Chute handle

12.Chute

Page 9

2.0 Safety

2.1 Safety Working

Before using this chipper, make sure that you are trained and fluent in its operation.

Know the location of and how to use all the safety features. Know how to control the

feed and stop the chipper in an emergency. Be familiar with the hazards and safe

working practices to prevent injury and damage to property and chipper. Also be

aware of the legal restrictions for personnel and towing with vehicles.

•The minimum age for service personnel is 18

years. Personnel aged 16 can use the

chipper for training under supervision by a

suitably trained person of 18 years or over.

•Operators and personnel working with this

chipper must not be under the influence of

alcohol, drugs or medication that would impair

judgement, concentration or reaction times.

Excessive tiredness is also a risk.

•In use, woodchip and debris are ejected with

considerable force from the chute and can

travel up to 10m. Make sure the chute directs

woodchip to a safe location so that no one can

be harmed or property damaged. Do not allow

discharge to be directed onto roads or public

rights of way.

•Maintain a 10m exclusion zone around the

chipper and clearly mark if in a public area.

Keep this area free of material build up.

•Make sure the chipper is on even, level and

stable ground and cannot move or topple

when in use. Use wheel chocks if necessary.

•Keep children and animals well away from the

working area.

•The chipper operator must wear protective

equipment:

▪Chainsaw safety helmet (EN 397) with

mesh visor (EN 1731)

▪Correctly rated ear defenders (EN 352)

▪Work gloves with elasticated wrist bands.

▪Steel toe cap boots (EN345-1)

▪Close fitting heavy duty non-snag clothing.

Hi-viz clothing (EN 471) if needed.

▪Protect breathing with a face mask if

appropriate. Some plant material can give

off harmful dust and poisonous vapours.

This may cause respiratory problems or

serious poisoning. Check the material to

be processed before starting.

•DO NOT wear rings, bracelets, watches,

jewellery or anything that could be caught on

the material being fed and draw you into the

chipper.

•All personnel operating or feeding material into

the chipper must wear heavy duty non-snag

clothing to help prevent being caught on

material and drawn into the chipper. The feed

mechanism of this chipper uses high powered

hydraulic motors to drive sharp toothed rollers

that feed material into the cutting blades. DO

NOT take risks with it. NEVER ASSIST ANY

MATERIAL INTO THE FEED ROLLERS WITH

HANDS OR FEET. Use the wooden paddle or

further long material if necessary.

•Never climb onto the hopper area while the

chipper is in operation.

•CAUTION! –Keep hands and feet outside the

hopper. Do not attempt to force material into

the chipper by hand –use a piece of wood if

necessary.

•Material can be forcibly ejected from the hopper

towards the operator. Ensure full head and

face protection is worn.

•Very twisted material should be trimmed into

manageable pieces. Failure to do this can

result in material extending outside the hopper,

moving aggressively side-to-side creating a

hazard to the operator.

•Do not try to force material over 150mm in

diameter into the chipper.

•Carefully site the chipper so operators can work

furthest from any local danger. For example,

on a road side, place chipper so operators work

on the verge and not in the road exposed to

traffic

Page 10

2.2 DO’s and DON’Ts

•DO ensure that the starting of the chipper can cause

no hazard before starting. i.e. no persons are in the

hopper or in any other danger aera

•DO stop the chipper before making any adjustments,

refuelling or cleaning

•DO make sure the chipper has stopped rotating and

remove the ignition key before any maintenance or the

chipper is left unattended. The belts and pulley are to

be used to ensure visually that the chipper has

stopped rotating

•DO ensure that the chipper is level, well supported

and cannot move during use

•DO run the chipper at full throttle

•DO conduct regular chipper checks for visual fluid

leaks

•DO take regular breaks. Wearing protective

equipment can be hot and tiring leading to a lack of

concentration, increasing the risk of having an

accident

•DO keep hands, feet and clothing out of feed area,

chute and moving parts

•DO always check the all of controls and safety devices

(emergency stops, stop bar) before feeding any wood

into the chipper

•DO remove any additional debris attached to the wood

before commencing work i.e. nails, wire, rope etc

•DO NOT use chipper in poor visibility or insufficient

light to see clearly

•DO NOT use or attempt to start the chipper without the

discharge chute or guards correctly and securely fitted

•DO NOT stand directly in front of the in-feed hopper

when using the chipper. Stand to one side

•DO NOT allow the following to enter the chipper as

damage is likely:

•DO NOT stand in front of the chute

•DO NOT smoke when refuelling. Petrol fuel is highly

flammable and explosive in certain conditions

•DO NOT let anyone who has not received instruction,

operate the chipper

•DO NOT climb on the chipper at any time except for a

tracked chipper ride-on plate where fitted

•DO NOT handle material partially engaged in the

chipper while in operation

•DO NOT touch any exposed wiring whilst the chipper

is running

•DO NOT restart the chipper immediately if an

emergency stop has caused a shut down. Before

disengaging the emergency stop a thorough

inspection of the chipper should be carried out to

ensure the safety conditions are being met

Bricks

Metal

String

Glass

Cloth

Rubber

Plastic

Roots

Stones

Bedding Plants

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