LawnMaster GVB1316 Operator's Manual

16" 13 Amp Scarifier and Lawn Dethatcher

Save this manual for future reference

Specifications

SCARIFIER/DETHATCHER GVB1316
Voltage 120 V ~ 60 Hz
Current 13 A
Motor Speed 3700 RPM
Cutting Width 16 inch (406 mm)
Height Adjustment 14 positions: -0.35 -0.19 inch (-9 -5 mm) for Scarifier Cylinder
14 positions: -0.19 -0.35 inch (-5 -9 mm) for Dethatcher Cylinder
Collection Bag Capacity 11.9 gallon (45 liters)
Wheel Size 3.9 inch (100 mm) / 6.7 inch (170 mm)
Unit Weight 20.28 lbs (9.2kg)

Important Safety Instructions

WARNING READ AND UNDERSTAND ALL INSTRUCTIONS. Failure to follow all instructions listed below and, on the tool, may result in electric shock, fire, and/or serious personal injury.

INTRODUCTION This product has many features for making its use more pleasant and enjoyable. Safety, performance, and dependability have been given top priority in the design of this product making it easy to maintain and operate.

WARNING This symbol indicates important safety instructions. If these instructions are not followed, it could endanger the personal safety and/or property of the operator and others. Read and understand all instructions in this manual before attempting to operate the scarifier/dethatcher. Failure to comply with these instructions may result in personal injury.

TRAINING AND PREPARATION

WARNING To reduce the risk of electric shock, this tool has a polarized plug (one blade is wider than the other) and will require the use of a polarized extension cord. The tool plug will fit into a polarized extension cord only one way.

OPERATION

Method of securing cord set

[Diagram showing how to tie a cord set or connect plug and receptacle]

OPERATING THE SCARIFIER/DETHATCHER ON A SLOPE

CAUTION Slopes are a major factor related to slip and fall accidents, which can result in severe injury. Operation on slopes requires extra caution. If you feel uneasy on a slope, do not operate this tool.

CHILDREN

Tragic accidents can occur if the operator is not alert in the presence of small children. Children are often attracted to the tool and the scarifying/dethatching activity. Children do not understand the dangers. Never assume that children will remain where you last saw them.

ELECTRICAL INFORMATION

WARNING TO AVOID ELECTRICAL HAZARDS, FIRE HAZARDS, OR DAMAGE TO THE TOOL, USE PROPER CIRCUIT PROTECTION. YOUR SCARIFIER/DETHATCHER IS WIRED AT THE FACTORY FOR 120V OPERATION. CONNECT TO A 120 V, 15 A CIRCUIT, AND USE A 15 A TIME-DELAYED FUSE OR CIRCUIT BREAKER. TO AVOID SHOCK OR FIRE, IF THE EXTENSION CORD IS WORN, CUT OR DAMAGED IN ANY WAY, REPLACE IT IMMEDIATELY.

DOUBLE INSULATED This scarifier/dethatcher has a plug. The scarifier/dethatcher is double insulated to provide a double thickness of insulation between you and the tool's electrical system. All exposed metal parts are isolated from the internal metal motor components with protective insulation.

WARNING USE ONLY IDENTICAL REPLACEMENT PARTS WHEN SERVICING THE SCARIFIER/DETHATCHER TO AVOID INJURY.

WARNING DOUBLE INSULATION DOES NOT TAKE THE PLACE OF NORMAL SAFETY PRECAUTIONS WHEN OPERATING THIS SCARIFIER/DETHATCHER.

CAUTION ALWAYS MAKE SURE THAT YOUR OUTLET IS PROPERLY GROUNDED. IF UNCERTAIN, HAVE IT CHECKED BY A CERTIFIED ELECTRICIAN.

GUIDELINES FOR USING EXTENSION CORDS

USE THE PROPER EXTENSION CORD. Make sure your extension cord is in good condition. When using an extension cord, be sure to use one heavy enough to carry the current your product will draw. An undersized cord will cause overheating. The table below shows the correct size to use depending on cord length and nameplate ampere rating. If in doubt, use the next heavier gauge. The smaller the gauge number, the heavier the cord.

Minimum Gauge for Extension Cords (AWG) (Using 120 V only)
120V Total Length of Cord in Feet (meters)
25ft (7.62m) 50ft (15.24m) 100ft (30.48m) 150ft (45.72m)
Ampere Rating AWG
More Than Not More Than
0 6 18 16 16 14
6 10 18 16 14 12
10 12 16 16 14 12
12 16 14 12 Not Recommended

Make sure your extension cord is properly wired and in good electrical condition. Always replace a damaged extension cord or have it repaired by a qualified person before use. Keep extension cords away from sharp objects, excessive heat and damp or wet areas.

Use a separate electrical circuit for your tools. This circuit should comprise a wire of at least 12 gauge and should be protected with a 15 A time-delayed fuse. Before connecting the motor to the power line, make sure the switch is in the OFF position and the electric current is identical to that stamped on the motor nameplate. Running at a lower voltage will damage the motor.

WARNING SAVE THESE INSTRUCTIONS. ALTHOUGH THIS DETHATCHER IS DOUBLE INSULATED, THE EXTENSION CORD AND RECEPTACLE MUST STILL BE GROUNDED WHILE IN USE TO PROTECT THE OPERATOR FROM ELECTRICAL SHOCK.

Refer to them frequently and use them to instruct others who may use this tool. If you loan someone this tool, loan them these instructions also.

Symbols

Some of the following symbols may be used on this product. Please study them and learn their meaning. Proper interpretation of these symbols will allow you to operate the product better and safer.

SYMBOL NAME DESIGNATION/EXPLANATION
V Volts Voltage
A Amperes Current
Hz Hertz Frequency(cycles per second)
W Watt Power
hrs Hours Time
Class II Construction Double-insulated construction

The following signal words and meanings are intended to explain the levels of risk associated with this product.

SYMBOL SIGNAL MEANING
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.
NOTICE (Without Safety Alert Symbol) Indicates a situation that may result in property damage.

SERVICE

Service requires extreme care and knowledge and should be performed only by a qualified service technician. When servicing, use only identical replacement parts.

For troubleshooting or replacement, please call Customer Service for assistance (Toll-free number 866-384-8432).

WARNING To avoid serious personal injury, do not attempt to use this product until you read thoroughly and understand completely the Operator's Manual. If you do not understand the warnings and instructions in the Operator's Manual, do not use this product. Call Customer Service for assistance (Toll-free number 866-384-8432).

Know Your Scarifier/Dethatcher

The safe use of this product requires an understanding of the information on the product and in this Operator's Manual as well as a knowledge of the project you are attempting. Before use of this product, familiarize yourself with all operating features and safety rules.

[Diagram of the LawnMaster GVB1316 Scarifier/Dethatcher with numbered parts]

Components

  1. Start/Stop Bale Switch
  2. Upper Handle
  3. Cord Retainer
  4. Carriage Bolt & Wing Nut (X4)
  5. Middle Handle
  6. Lower Handle
  7. Collection Bag
  8. Deck
  9. Height Adjustment Lever
  10. Rear Wheel
  11. Front Wheel
  12. Motor Cover
  13. Safety Guard Flap
  14. Cable Clip (X2)
  15. Power Cord
  16. Safety Switch Button
  17. Dethatcher Cylinder
  18. Scarifier Cylinder
  19. Mounting Bolt
  20. Bearing Cover

Assembly

This product requires assembly.

PACKING LIST

WARNING If any parts are damaged or missing do not operate this product until the parts are replaced. Failure to heed this warning could result in serious personal injury.

WARNING Do not attempt to modify this product or create accessories not recommended for use with this product. Any such alteration or modification is misuse and could result in a hazardous condition leading to possible serious personal injury and will void the warranty.

WARNING Do not connect power supply until assembly is complete. Failure to comply could result in accidental starting and possible serious personal injury.

ASSEMBLING THE HANDLE (See Figs. 1-5)

WARNING Never operate the tool without the proper safety devices in place and working. Never operate the tool with damaged safety devices. Failure to heed this warning can result in serious personal injury.

During assembly, ensure that the power cable is not squeezed and that it has sufficient play.

[Diagrams illustrating handle assembly steps 1-5]

ASSEMBLING THE COLLECTION BAG

[Diagram showing how to pull the grass collection bag over the metal frame]

[Diagram of the assembled grass collection bag]

INSTALLING AND REMOVING THE COLLECTION BAG

NOTE: The safety flap is spring operated. Ensure you have a firm grip when opening and closing to avoid personal injury. Recommendation: Work with the collection bag for dethatching and without the collection bag for scarifying.

Installing the collection bag:

[Diagram showing how to install the collection bag]

[Diagram showing the collection bag properly seated]

Removing the collection bag:

NOTE: To reduce the risk of injury, frequently inspect the bag assembly and replace if there are any signs of wear or deterioration.

Operation

WARNING Do not use any attachments or accessories not recommended by the manufacturer of this product. The use of attachments or accessories not recommended can result in serious personal injury.

WARNING Do not switch on the tool until it has been completely assembled. Before switching on the tool, always check the power cord for signs of damage. Only use an undamaged power cord. NOTE: A damaged power cord is highly dangerous!

SETTING THE WORKING POSITIONS

The tool has 4 principal position settings:

NOTE: When the tool is delivered, it will be set in the transport position.

To set the work positions:

NOTE: The height adjustment lever is not intended for height adjustment but rather to compensate for wear. Selection of a readjustment position without the corresponding wear can overload the motor and damage the cylinder.

[Diagram showing the height adjustment lever]

STARTING/STOPPING THE TOOL

WARNING Before switching on the tool ensure that it is not in contact with any objects. Keep your feet and hands well away from the cylinder and the ejector opening. There is a possible danger of injury!

[Diagrams illustrating starting and stopping the tool]

WARNING The cylinder continues to run for a brief period after the tool has been switched off. Do not tilt or carry the tool while the motor is still running and do not touch the cylinder while it is still rotating. There is a possible danger of injury!

Overload Protection

This product is equipped with overload protection function, and it will be activated in the following circumstances:

  1. If the cutting device is wrapped by a build-up of debris.
  2. If the material scarified is larger than the motor capacity.
  3. Where there is too much resistance against the cutting device.

When the circuit breaker has been activated, switch off the product and disconnect it from the power supply. Let the product cool down and clear the problem before restarting.

CHANGING THE CYLINDER

The tool has two easily exchangeable work cylinders: a dethatcher cylinder made of hard plastic with vertically rotating spring tines, and a scarifier cylinder with vertically mounted high-grade steel knives.

WARNING Switch off the tool, disconnect the mains plug and wait until the cylinder is standing still.

WARNING Always wear gloves when handling the cylinder.

[Diagram showing how to remove the cylinder]

[Diagram showing how to install the cylinder]

USING YOUR TOOL

To maintain a well-cared-for lawn it should be dethatched every 4 to 6 weeks. Scarifying with the blade cylinder is a more intensive treatment than dethatching and should only be carried out once a year. The best time is in spring after the lawn has been mown for the first time.

How to use your scarifier

How to use your dethatcher

WARNING When working on slopes always proceed across the slope. Be particularly careful when walking backwards and pulling the tool. There is a possible danger of stumbling.

NOTE: The shorter the grass, the better the lawn can be treated. Furthermore, the load on the tool is less and the service life of the cylinder is prolonged.

Maintenance

WARNING When servicing, use only identical replacement parts. Use of any other parts may create a hazard or cause product damage.

WARNING Always wear gloves when handling the cylinder.

WARNING Prior to all maintenance and cleaning work always switch off the tool, disconnect the plug from the power socket and wait until the cylinder is standing still.

GENERAL MAINTENANCE

WARNING Do not jet water onto the tool and do not clean it under flowing water. This would result in the danger of an electric shock and the tool could be damaged.

WARNING Do not use any attachments or accessories not recommended by the manufacturer of this product. The use of attachments or accessories not recommended can result in serious personal injury.

STORAGE

NOTE: Ensure that the power cord is not squeezed.

[Diagrams showing storage positions of the tool]

Troubleshooting

Suspected malfunctions are often due to causes that the user can fix themselves. Therefore, check the product using this section. In most cases the problem can be solved quickly.

WARNING Only perform the steps described within these instructions! If further assistance is required, please call Customer Service at 866-384-8432. All further inspection, maintenance and repair work must be performed by an authorized service center.

PROBLEM POSSIBLE CAUSE SOLUTION
Tool does not start. No power. Check power socket, cord, line; repair only by qualified electrician.
Defective power cord. Call Customer Service for assistance (Toll-free number 866-384-8432).
Safety switch button is not pressed. Press and hold the safety switch button. Pull the start/stop bale switch toward the handle and release the safety switch button.
Start/stop bale switch defective. Call Customer Service for assistance (Toll-free number 866-384-8432).
Carbon brushes worn out. Call Customer Service for assistance (Toll-free number 866-384-8432).
Motor defective. Call Customer Service for assistance (Toll-free number 866-384-8432).
Abnormal noises, clatter or vibrations. Foreign object in the cylinder. Remove the foreign object.
Damaged spring tines or cylinder knives. Exchange the cylinder.
Cylinder incorrectly mounted. Install the cylinder correctly. See Changing the Cylinder on page 18.
Toothed-belt slip. Call Customer Service for assistance (Toll-free number 866-384-8432).
Motor fails. Blocked by a foreign object. Remove the foreign object.
Grass is too long. Mow beforehand. See Operation on page 19-20.
Clogged by debris. Clean debris.
Spring tines of dethatcher cylinder worn out. Exchange the cylinder.
Work result is not satisfactory. Blades of scarifier cylinder blunt or damaged. Exchange the cylinder.
Toothed-belt defective. Call Customer Service for assistance (Toll-free number 866-384-8432).
Transport position or incorrect working position selected. Select working position 1 or readjust position 2-3. See Setting the Working Positions on page 16.
Grass is too long. Mow beforehand. See Operation on page 19-20.

LawnMaster® Warranty

We take pride in producing a high quality, durable product. This Lawnmaster® product carries a limited two (2) year warranty against defects in workmanship and materials from date of purchase under normal household use. If product is to be used for commercial, industrial or rental use, a 30 day limited warranty will apply. Warranty does not apply to defects due to direct or indirect abuse, negligence, misuse, accidents, repairs or alterations and lack of maintenance. Please keep your receipt/packing list as proof of purchase. This warranty gives you specific legal rights, and you may have other rights, which vary from state to state. For product service call Customer Service at (866)384-8432.

Items not covered by warranty:

  1. Any part that has become inoperative due to misuse, commercial use, abuse, neglect, accident, improper maintenance, or alteration;
  2. The unit, if it has not been operated and/or maintained in accordance with the owner's manual;
  3. Normal wear, except as noted below;
  4. Routine maintenance items such as lubricants, blade sharpening;
  5. Normal deterioration of the exterior finish due to use or exposure.

Transportation Charges: Transportation charges for the movement of any power equipment unit or attachment are the responsibility of the purchaser. It is the purchaser's responsibility to pay transportation charges for any part submitted for replacement under this warranty unless such return is requested in writing by LawnMaster.

SAVE YOUR RECEIPTS. THIS WARRANTY IS VOID WITHOUT THEM.

Exploded View

[Diagram of the GVB1316 Exploded View with numbered parts]

Parts List

Key Number Part Number Description Quantity
1 Switch Box Assembly 1
2 191024102 Rear Wheel Assembly 2
3 191007109 Front Wheel Assembly (170mm) 2
3.1 111009116 Cap 2
4 191024103 Scarifier Cylinder 1
5 191024104 Dethatcher Cylinder 1
6 Motor Cover 1
7 191024106 Safety Guard Flap 1
8 191024107 Metal Frame 1
9 191024108 Collection bag 1
10 Lower Handle Assembly 2
10.1 Screw St4.8*12 2
11 191024109 Wing Nut Assembly 4
12 Middle Handle 1
13 111005128 Cord Retainer 1
14 Upper Handle Assembly 1
15 Start/Stop Bale Switch Assembly 1
16 111001111 Cable Clip 2

Replacement parts highlighted in grey are available for after sales purchase. Replacement of repair or internal parts should only be done by a qualified service professional. Please contact your authorized service dealer or Customer Service at 866-384-8432.

Notes

[Blank lined section for notes]

Models: GVB1316 Electric 16 Inch 13 Amp Dethatcher and Scarifier, GVB1316, Electric 16 Inch 13 Amp Dethatcher and Scarifier, 16 Inch 13 Amp Dethatcher and Scarifier, Dethatcher and Scarifier

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