Hayter CODE378A User manual

Register at www.hayter.co.uk
Original Instructions (EN)
BY APPOINTMENT TO
HER MAJESTY THE QUEEN
MANUFACTURERS OF HAYTER
HORTICULTURAL MACHINERY
TORO U.K. LIMITED, SPELLBROOK,
BISHOPS STORTFORD, HERTS
Operator’s Manual
Form No. 3456-183 Rev A
Harrier 41 Pro 60V* Autodrive
* 60V maximum / 54V typical.
Model No. CODE378A - Serial No. 414000000 and Up

Register at
www.hayter.co.uk
Contact us at www.hayter.co.uk
Printed in China
All Rights Reserved
©2023 - Toro U.K. Limited
Spellbrook, Bishop’s Stortford,
Herts, CM23 4BU
This product complies with all relevant European directives; for details, please see the separate product
specific Declaration of Conformity (DOC) sheet.
Introduction
This rotary-blade, walk-behind lawn mower is intended to be used by residential homeowners. It is designed
primarily for cutting grass on well-maintained lawns on residential properties. It is not designed for cutting
brush or for agricultural uses. It is designed primarily to use Hayter approved lithium-ion battery packs.
Using these products for purposes other than their intended use could prove dangerous to you and
bystanders.
CODE378A does not include a battery or a charger. These are available to purchase from your local Hayter
Sales Dealer.
Read this information carefully to learn how to operate and maintain your product properly and to avoid
injury and product damage. You are responsible for operating the product properly and safely.
Visit www.hayter.co.uk for more information, including safety tips, training materials, accessory information,
help finding a dealer, or to register your product.
Whenever you need service, genuine manufacturer parts, or additional information, contact a Hayter
Authorised Service Dealer or Hayter Customer Care and have the model and serial numbers of your product
ready. Figure 1 identifies the location of the model and serial numbers on the product. Write the numbers
in the space provided.
Important: With your mobile device, you can scan the QR code on the serial number decal (if equipped)
to access warranty, parts, and other product information.
XXXXXXX XX
XX XX XX
CODE NO. XXXXXXXX
SERIAL NO. 4XXXXXXXX
CODE NO. XXXXXXXX
SERIAL NO. 4XXXXXXXX
XXXXXXX XX
XX XX XX
Figure 1
Model No. __________________________________
Serial No. __________________________________

4EN
Safety-Alert Symbol
The safety-alert symbol appears above information that alerts you to unsafe actions or situations and is
followed by the word DANGER, WARNING, or CAUTION.
Figure 2
Safety-alert symbol
The safety-alert symbol appears above information that alerts you to unsafe actions or situations and is
followed by the word DANGER, WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious
injury.
WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury.
This manual uses two other words to highlight information. Important calls attention to special mechanical
information and Note emphasises general information worthy of special attention.

5EN
Contents
Safety 7 - 9
- Training 7
- Preparation 7
- Operation 8
- Maintenance and Storage ................................................. 9
Safety and Instructional Decals ............................................. 10 - 12
Setup .................................................................................. 13 - 16
- Mounting the Battery Charger (Optional) .......................... 13
- Unfolding the Handle ....................................................... 14
- Assembling Grass Bag....................................................... 14
- Product Overview ............................................................ 15
- Specifications .................................................................. 15
- Appropriate Temperature Ranges ...................................... 15
Operation ............................................................................ 16 - 25
- Before Operation ............................................................. 16 - 17
- Inserting the Electric-Start Button ................................... 16
- Installing the Battery Pack .............................................. 16
- Adjusting the Cutting Height .......................................... 17
- During Operation ............................................................. 18 - 21
- Starting the Machine ...................................................... 18
- Using the Self-Propel Drive ............................................. 18
- Bagging the Grass Clippings ........................................... 19
- Installing the Grass Bag .................................................. 19
- Removing the Grass Bag ................................................ 19
- Rear-Discharging the Grass Clippings .............................. 20
- Rear Deflector ............................................................... 20
- Shutting off the Machine ................................................ 20
- Removing the Battery Pack ............................................. 21
- Adjusting the Blade Speed .............................................. 21
- Operating Tips ................................................................. 22
- General Mowing Tips...................................................... 22
- Cutting Grass ................................................................ 22
- Cutting Leaves ............................................................... 22

6EN
- After Operation ................................................................ 23 - 25
- Charging the Battery Pack .............................................. 23 - 24
- Cleaning under the Machine ........................................... 24
- Folding the Handle ......................................................... 25
Maintenance ........................................................................ 26 - 30
- Lubricating the Machine ................................................... 26
- Replacing the Blade .......................................................... 26 - 27
- Blade Sharpening ............................................................. 27 - 28
- Adjusting the Self-Propel Drive ......................................... 28 - 29
- Prepare the Battery for Recycling ...................................... 29
- Securing Nuts and Bolts ................................................... 29
- Rear Deflector .................................................................. 29
- Blade Brake Test ............................................................... 29
Storage ................................................................................ 30
Troubleshooting .................................................................. 31 - 32
Warranty ............................................................................. 33
Privacy Policy ...................................................................... 34

7EN
Safety
IMPORTANT SAFETY INSTRUCTIONS
WARNING—When using an electric machine, always read and follow basic safety warnings and instructions
to reduce the risk of fire, electric shock, or injury, including the following:
Training
1. The operator of the machine is responsible for any accidents or hazards occurring to others or their
property.
2. Do not allow children to use or play with the machine, battery pack, or the battery charger; local
regulations may restrict the age of the operator.
3. Do not allow people with reduced physical, sensory, or mental capabilities or without experience and
knowledge to use the machine, battery pack, or battery charger, unless they receive instruction or
supervision on using it safely and understand the hazards involved while using it.
4. Before using the machine, battery pack, and battery charger, read all the instructions and cautionary
markings on these products.
5. Become familiar with the controls and proper use of the machine, battery pack, and battery charger.
Preparation
1. Keep bystanders, especially children, and pets, out of the operating area.
2. Do not operate the machine without all guards and safety devices, such as deflectors and grass catchers,
in place and functioning properly on the machine.
3. Inspect the area where you will use the machine and remove all objects that could interfere with the
operation of the machine or that the machine could throw.
4. Before using the machine, ensure that the blade, blade bolt, and blade assembly are not worn or
damaged. Replace any damaged or unreadable labels.
5. Use only the battery pack specified by Hayter. Using other accessories and attachments may increase
the risk of injury and fire.
6. Plugging the battery charger into an outlet that is not 100V - 240V can cause a fire or electric shock. Do
not plug the battery charger into an outlet other than 100V - 240V. For a different style of connection,
use an attachment plug adapter of the proper configuration for the power outlet if needed.
7. Do not use a damaged or modified battery pack or battery charger, which may exhibit unpredictable
behaviour that results in fire, explosion, or risk of injury.
8. If the supply cord to the battery charger is damaged, contact an Authorised Service Dealer to replace it.
9. Do not use non-rechargeable batteries.
10. Charge the battery pack with only the battery charger specified by Hayter. A charger suitable for 1 type
of battery pack may create a risk of fire when used with another battery pack.
11. Charge the battery pack in a well-ventilated area only.
12. Do not expose a battery pack or battery charger to fire or to temperatures higher than 68°C (154°F).
13. Follow all charging instructions and do not charge the battery pack outside of the temperature range
specified in the instructions. Otherwise, you may damage the battery pack and increase the risk of fire.
14. Dress properly — Wear appropriate clothing, including eye protection; long trousers; substantial, slip-
resistant footwear (not barefoot or wearing sandals); and hearing protection. Tie back long hair and do
not wear loose jewellery that can get caught in moving parts.

8EN
Operation
1. Contact with the moving blade will cause serious injury. Keep your hands and feet away from the cutting
area and all moving parts of the machine. Keep clear of any discharge opening.
2. Using this machine for purposes other than its intended use could prove dangerous to you and
bystanders.
3. Disengage the self-propel drive (if equipped) before starting the machine.
4. Prevent unintentional starting—Ensure that the electric-start button is removed from the ignition before
connecting the battery pack and handling the machine.
5. Use your full attention while operating the machine. Do not engage in any activity that causes
distractions; otherwise, injury or property damage may occur.
6. Stop the machine, remove the electric-start button, remove the battery pack from the machine, and
wait for all movement to stop before adjusting, servicing, cleaning, or storing the machine.
7. Remove the battery pack and electric-start button from the machine whenever you leave it unattended
or before changing accessories.
8. Do not force the machine—Allow the machine to do the job better and safer at the rate for which it was
designed.
9. Stay alert—Watch what you are doing and use common sense when operating the machine. Do not use
the machine while ill, tired, or under the influence of alcohol or drugs.
10. Operate the machine only in good visibility and appropriate weather conditions. Do not operate the
machine when there is the risk of lightning.
11. Use extreme caution when reversing or pulling the machine toward you.
12. Keep proper footing and balance at all times, especially on slopes. Mow across the face of slopes, never
up and down. Use extreme caution when changing directions on slopes. Do not mow exceedingly steep
slopes. Walk, never run with the machine.
13. Do not direct the discharge material toward anyone. Avoid discharging material against a wall or
obstruction; material may ricochet toward you. Stop the blade(s) when crossing gravel surfaces.
14. Watch for holes, ruts, bumps, rocks, or other hidden objects. Uneven terrain could cause you to lose
your balance or footing.
15. Wet grass or leaves can cause serious injury if you slip and contact the blade. Avoid mowing in wet
conditions or when it is raining.
16. If the machine strikes an object or starts to vibrate, immediately shut off the machine, remove the
electric-start button, remove the battery pack, and wait for all movement to stop before examining the
machine for damage. Make all necessary repairs before resuming operation.
17. Stop the machine and remove the electric-start button before loading the machine for hauling.
18. Under abusive conditions, the battery pack may eject liquid; avoid contact. If you accidently come into
contact with the liquid, flush with water. If the liquid contacts your eyes, seek medical help. Liquid
ejected from the battery pack may cause irritation or burns.

9EN
Maintenance and Storage
1. Stop the machine, remove the electric-start button, remove the battery pack from the machine, and
wait for all movement to stop before adjusting, servicing, cleaning, or storing the machine.
2. Do not attempt to repair the machine except as indicated in the instructions. Have an Authorised Service
Dealer perform service on the machine using identical replacement parts.
3. Wear gloves and eye protection when servicing the machine.
4. Sharpen a dull blade on both cutting edges to maintain balance. Clean the blade and ensure that it is
balanced.
5. Replace the blade if it is bent, worn, or cracked. An unbalanced blade causes vibration, which could
damage the motor or cause personal injury.
6. When servicing the blade, be aware that the blade can still move even though the power source is off.
7. Check the grass collection bag frequently for deterioration or wear, and replace a worn bag with a Hayter
[replacement] bag.
8. For best performance, use only genuine Hayter replacement parts and accessories. Other replacement
parts and accessories could be dangerous, and such use could void the product warranty.
9. Maintain the machine—Keep cutting edges sharp and clean for the best and safest performance. Keep
handles dry, clean, and free from oil and grease. Keep guards in place and in working order. Keep blades
sharp. Use identical replacement blades only.
10. Check the machine for damaged parts—If there are damaged guards or other parts, determine whether
the machine will operate properly. Check for misaligned and binding moving parts, broken parts,
mounting, and any other condition that may affect its operation. Unless indicated in the instructions,
have an Authorised Service Dealer repair or replace a damaged guard or part.
11. When the battery pack is not in use, keep it away from metal objects such as paper clips, coins, keys,
nails, and screws that can make a connection from 1 terminal to another. Shorting the battery terminals
may cause burns or a fire.
12. Check the blade and motor mounting bolts frequently for tightness.
13. When you are not using the machine, store it indoors in a dry, secure place out of the reach of children.
14. CAUTION—A mistreated battery pack may present a risk of fire or chemical burn. Do not disassemble
the battery pack. Do not heat the battery pack above 68°C (154°F) or incinerate it. Replace the battery
pack with a genuine Hayter battery pack only; using another type of battery pack may cause a fire or
explosion. Keep battery packs out of the reach of children and in the original packaging until you are
ready to use them.
15. Do not dispose of the battery in a fire. The cell may explode. Check with local authorities for possible
special disposal instructions.
SAVE THESE INSTRUCTIONS

10 EN
Safety and Instructional Decals
CodexxxA
1
234
1. Read the Operator’s Manual. 3. For indoor use.
2. Do not discard. 4. Double insulated.
1234
134-6762
1. The battery pack is charging. 3. The battery pack is over or under the
appropriate temperature range.
2. The battery pack is fully charged. 4. Battery pack charging fault.
AUTO
MAX
134-4691
1. Auto speed 2. Max speed.
Safety decals and instructions are easily visible to the operator and are located near any area of
potential danger. Replace any decal that is damaged or missing.

11 EN
134-5016 A
1
4 5
2 3
134-5016
1. Warning—read the Operator’s Manual. 4. Thrown object hazard—keep bystanders away; shut off
the motor and wait for all moving parts to stop before
leaving the machine; pick up debris before mowing.
2. Cutting/dismemberment hazard of the hand, mower
blade—remove the key and read the Operator’s Manual
before performing maintenance.
5. Cutting/dismemberment hazard of the foot, mower
blade—do not mow up or down slopes; only mow across
slopes; look behind you when mowing in reverse.
3. Cutting/dismemberment hazard of the hand, mower
blade—stay away from moving parts; keep all guards and
shields in place.

12 EN
134-4551-A
1.
2.
3.
4.
1
2
3
134-4551
1. Read the Operator’s Manual. 3. To shut off the machine, release the
bar.
2. To start the machine, squeeze the bar
to the handle and press the button.
1
1
1
-
9
9
3
7
-
D
Easy Wash™ port
Located on top deck
Height of Cut
Moulded in top cover

13 EN
Setup
Note: The battery pack is not fully charged when you purchase it. Before using the tool for the first time,
refer to Charging the Battery Pack.
The electric-start button has been placed in the battery compartment for safe delivery. Ensure that you
remove it from the compartment and store in a safe place prior to assembly. To prevent accidental starting,
do not insert the electric-start button into the electric-start ignition until you are ready to start the motor.
Important: To prevent accidents cut off the long ribbon attached to the grass bag and discard. Figure 3.
Figure 3
Mounting the Battery Charger (Optional)
Parts needed for this procedure:
2 Mounting hardware (not included)
If desired, mount the battery charger securely on a wall using the wall-mount key holes on the back of the
charger.
Mount it indoors (such as a garage or other dry place), near a power outlet, and out of the reach of children.
Refer to Figure 4 for assistance in mounting the charger.
Slide the charger over the appropriately positioned hardware to secure the charger in place (hardware not
included).
101.6 mm
4 in
Figure 4

14 EN
Unfolding the Handle
WARNING: Unfolding the handle improperly can damage the cables, causing an unsafe operating
condition.
• Do not damage the cable(s) when folding and unfolding the handle.
• Ensure that the cable (s) are routed to the outside of the handle.
• If a cable is damaged, contact an Authorised Service Dealer.
Important: Remove and discard the protective plastic sheet that covers the motor and any other plastic or
wrapping on the mower.
1. Loosen the handle knobs sufficiently to allow the handle to pivot (1).
2. Hold the motor stop lever in towards the handle (2) and unfold the handle to the operating position (3),
then release.
3. Tighten both handle knobs to secure the handle in position. Figure 5.
1
2
3
Figure 5
Assembling the Grass Bag
1
2
Figure 6
1. Grass Bag Frame
2. Grass Bag Clip

15 EN
Product Overview
1
2
3
4
5
6
7
8
9
10
11
12
Figure 7
1. Motor 7. Handle
2. Easy Wash Port 8. Electric Start Button
3. Handle Bolt 9. Electric Starter
4. Grass Bag Assembly 10. Rear Deflector
5. Self-Propel Lever 11. Height of Cut Lever
6. Blade Control Bar 12. Battery Compartment
Specifications
Model Weight*
kg
Length
mm
Width
mm
Cutting Width
mm
Height
mm
CODE378A 39.5 1440 485 410 1040
* Without battery or packaging.
Appropriate Temperature Ranges
Charge/store the battery
pack at
5°C (41°F) to 40°C (104°F)*
Use the battery pack at -30°C (-22°F) to 49°C (120°F)*
Use the machine at 0°C (32°F) to 49°C (120°F)*

16 EN
Operation
Note: Determine the left and right sides of the machine from the normal operating position.
Before Operation
Inserting the Electric-Start Button
Remove the electric-start button (1) from the plastic parts bag and insert it into the electric starter (2).
Figure 8.
1
2
Figure 8
1. Electric-Start Button
2. Electric Starter
Installing the Battery Pack
Important: Use the battery pack only in temperatures that are within the appropriate range; refer to
Specifications.
1. Make sure that the vents on the battery are clear of any dust and debris.
2. Lift up the battery-compartment lid (A of Figure 9).
3. Line up the cavity in the battery pack with the tongue on the machine and slide the battery pack into
the compartment until it locks into place. (B of Figure 9).
4.Close the battery compartment-lid (C of Figure 9).
Note: If the battery-compartment lid does not close completely, the battery is not fully installed.
A B C
Figure 9

17 EN
Adjusting the Cutting Height
WARNING: Adjusting the cutting-height could bring your hands into contact with a moving blade, and
result in serious injury.
• Shut off the machine, remove the electric-start button, remove the battery pack, and wait for all
movement to stop before adjusting the cutting height.
• Do not put your fingers under the housing when adjusting the cutting height.
Always select a cutting height to suit the operating conditions. Prevent motor overload and blockages by
avoiding low cuts in long grass. Be prepared to make two cuts when the grass is long.
To adjust the cutting height, grip the lever, and pull it sideways to disengage it from the locking notch.
• Pull the lever backwards to raise the cutting height
• Push the lever forwards to lower the cutting height.
Finally release the lever at the required position and ensure it locks firmly into one of the setting notches.
Figure 10.
++
--
Figure 10
There are 7 cutting-height settings from 13 to 60 mm.

18 EN
During Operation
Starting the Machine
1. Ensure that the battery pack is installed in the machine; refer to Installing the Battery Pack.
2. Insert the electric-start button into the electric starter switch (1). Figure 11.
3. Squeeze the blade-control bar (2) and hold it to the handle. Figure 11.
4. Press the electric-start button and keep it pressed until the motor starts (3). Figure 11.
1
2
3
Figure 11

19 EN
Using the Self-Propel Drive
To operate the self-propel drive, squeeze the self-propel lever (1) toward the handle and hold it. Figure 12.
1
2
Figure 12
1. Self-Propel Lever
To disengage the self-propel drive, release the self-propel lever.
When the self-propel drive lever is disengaged the mower may be pushed. This feature is useful when
mowing in confined areas.
Bagging the Grass Clippings
Use the grass bag when you want to collect grass and leaf clippings from the lawn.
Installing the Grass Bag
1. Raise and hold up the rear deflector (A of 13).
2. Install the grass bag, ensuring that the pins on the bag rest in the notches on the handle (B of 13).
3. Lower the rear deflector.
A
B
Figure 13
Removing the Grass Bag
1. To remove the bag, reverse the steps in Installing the Grass Bag.

20 EN
Rear-Discharging the Grass Clippings
Use the rear discharge for cutting very tall grass.
Note: If the grass bag is on the machine, remove it before rear-discharging the clippings; refer to Removing
the Grass Bag.
Rear Deflector
The machine must be used with the grass bag attached or the rear deflector in the closed position. Figure
14.
Figure 14
Shutting off the Machine
1. Release the blade-control bar (A of Figure 15).
2. Remove the electric-start button from the electric starter. (B of Figure 15).
3. Remove the battery pack; refer to Removing the Battery Pack from the Machine.
Note: Whenever you are not using the machine, remove the electric-start button and battery pack.
1
2
Figure 15