VEVOR
TOUGH TOOLS, HALF PRICE
1" Air Impact Wrench (Twin Hammer)
OPERATING MANUAL
Model No.: LZ999
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This is the original instruction. Please read all manual instructions carefully before operating. VEVOR reserves the right to interpret its user manual. The appearance of the product is subject to the received item. VEVOR will not provide further notification for technology or software updates.
TECHNICAL DATA
| Specification | Value |
|---|---|
| Square drive | 1" |
| Free Speed | 3,000rpm |
| Working torque | 5760 N.m |
| Max torque | 6336 N.m |
| Avg. air consumption | 9.5cfm |
| Operating pressure | 90psi (6.3bar) |
| Air hose | 1/2" ID |
| Weight | 21.3kgs |
| Vibration in the handle | 2.8m/s² |
IMPORTANT SAFETY RULES
- Always wear safety goggles, an appropriate face mask or respiratory equipment when using the tool.
- Ensure the machine is switched off before connecting to the air supply.
- Disconnect the machine from the air supply before changing accessories (blades, discs) or performing any servicing.
- Keep your air tool clean and lubricated. Daily lubrication is essential to prevent internal corrosion and potential failure.
- Do not wear watches, rings, bracelets, or loose clothing when using air tools.
- Use only lightweight coil hoses from the tool to the wall or compressor coupling. Do not fit quick-change couplings onto the machine, as vibration can cause them to fail.
- Do not overload the machine. Operate the tool at its optimum speed for maximum efficiency.
- Do not increase air pressure above the manufacturer's recommended level, as excessive overload can cause the machine casing to split and lead to wear and possible failure of moving parts.
- For safety and to prevent damage to the machine/operator, always ensure the machine has stopped before putting it down after use.
- Always ensure the workpiece is firmly secured, leaving both hands free to control the machine.
- Always ensure accessories (blades, discs, sockets, etc.) are designed for use with the machine and are correctly and securely fastened before connecting to the air supply.
OPERATING INSTRUCTION
Description
Features a durable twin hammer impact wrench mechanism, pressure-feed lubrication, adjustable power regulator, variable speed, high torque, and side exhaust. Designed for tackling tough jobs with proven durability and economy.
Air supply
- Ensure the wrench air valve (or trigger) is in the "off" position before connecting to the air supply.
- An air pressure of 90psi and appropriate airflow according to specifications are required.
- WARNING! Ensure the air supply is clean and does not exceed 90psi during operation. Excessive pressure and unclean air can shorten product life due to wear and may cause damage or personal injury.
- Drain the air tank daily. Water in the air line can damage the wrench.
- Clean the air inlet filter weekly.
- Line pressure should be increased to compensate for unusually long air hoses (over 8 meters). The hose diameter should be 3/8" I.D.
- Keep the hose away from heat, oil, and sharp edges. Check the hose for wear and ensure all connections are secure.
Lubrication
An automatic in-line filter-regulator-lubricator (FRL) is recommended to increase tool life and ensure sustained operation. The FRL should be regularly checked and filled with air tool oil.
To adjust the FRL: Place a sheet of paper near the exhaust ports and hold the throttle open for approximately 30 seconds. The FRL is set correctly when a light stain of oil collects on the paper. Avoid excessive oil.
For extended storage (overnight, weekend), the tool should receive generous lubrication. Run the tool for approximately 30 seconds to distribute oil evenly. Store the tool in a clean, dry environment.
- Proper lubrication is critical. Without it, the tool will not function correctly, and parts will wear prematurely.
- Use only recommended lubricants specifically made for pneumatic applications. Substitutes may harm rubber compounds in O-rings and other rubber parts. The lubricator should be of a low air flow or changing air flow type and kept filled to the correct level.
IMPORTANT!!!
If an FRL is not installed, air-operated tools should be lubricated manually at least once a day or after every 2 hours of work. Apply 2 to 6 drops of oil directly through the male fitting in the tool housing, depending on the work environment.
Loading and operation
⚠️ WARNING: Ensure you read, understand, and apply safety instructions before use.
- Only use impact sockets specifically designed for impact wrenches.
- Connect the wrench to the air hose.
- Place the socket over the nut and depress the trigger to operate the wrench.
- To change direction, push the button at the top of the handle: "R" for reverse, "F" for forward.
- Air flow can be regulated by adjusting the flow valve at the base of the handle.
DO NOT use additional force to remove a nut. DO NOT allow the wrench to run freely for extended periods, as this will shorten its life.
MAINTENANCE
WARNING: Disconnect wrench from air supply before changing accessories, servicing, or performing maintenance. Replace or repair damaged parts using only genuine parts. Non-authorized parts may be dangerous.
- Lubricate the air wrench daily with a few drops of air tool oil dripped into the air inlet.
- DO NOT use worn or damaged sockets.
- Loss of power or erratic action may be due to:
- Excessive drain on the air line, moisture, or restriction in the air pipe, or incorrect size/type of hose connectors. Check the air supply and follow instructions.
- Grit or gum deposits in the wrench. If your model has an air strainer (at the air inlet), remove and clean it.
- When not in use, disconnect from the air supply, clean the wrench, and store it in a safe, dry, childproof location.
TROUBLE SHOOTING
The following table lists common operating problems and their solutions. Read and follow carefully.
WARNING: If any of these symptoms appear during operation, stop using the tool immediately to avoid serious personal injury. Only qualified persons or authorized service centers can perform repairs or replacements. Disconnect the tool from the air supply before attempting repair or adjustment. Lubricate O-rings or cylinders with air tool oil before assembly when replacing them.
| PROBLEMS | POSSIBLE CAUSES | REMEDIES |
|---|---|---|
| Tool runs at normal speed but loses under load | • Motor parts worn. • Cam clutch worn or sticking due to lack of lubricant. |
• Lubricating clutch housing. • Check for excess clutch oil. Clutch cases need only be half full. Overfilling can cause drag on high-speed clutch parts (e.g., a typical wrench requires 1/2 ounce of oil). GREASE LUBRICATED NOTE: Heat usually indicates insufficient grease. Severe operating conditions may require more frequent lubrication. |
| Tool runs slowly. Air flows slightly from exhaust | • Motor parts jammed with dirt particles. • Power regulator in closed position. • Air flow blocked by dirt. |
• Check air inlet filter for blockage. • Pour air tool lubricating oil into air inlet as per instructions. • Operate tool in short bursts, quickly reversing rotation back and forth where applicable. • Repeat above as needed. |
| Tools will not run. Air flows freely from exhaust | • One or more motor vanes stuck due to material build up. | • Pour air tool lubricating tool into air inlet. • Operate tool in short bursts of forward and/or reverse rotation where applicable. • Tap motor housing gently with a plastic mallet. • Disconnect supply. Free motor by rotating drive shank manually where applicable. |
| Tool will not shut off | • 'O' rings throttle valve dislodged from seat inlet valve. | • Replace 'O' ring. |
Note: Repairs should be carried out by a qualified person.
PARTS LIST
The following tables detail the components of the impact wrench.
Main Assembly
| No. | Description | Qty | No. | Description | Qty |
|---|---|---|---|---|---|
| 1 | oil seal | 1 | 14 | hammer cage | 1 |
| 2 | screw | 1 | 15 | hammer frame | 1 |
| 3 | spring washer | 1 | 16 | bearing | 1 |
| 4 | hex flange nut | 1 | 17 | housing | 1 |
| 5 | front motor housing | 1 | 18 | Screw cover | 1 |
| 6 | hammer case gasket | 1 | 19 | handle | 1 |
| 7 | bushing | 1 | 20 | spring washer | 1 |
| 8 | retainer washer | 1 | 21 | screw | 1 |
| 9 | anvil ring | 1 | 22 | front bearing | 1 |
| 10 | O-ring | 1 | 23 | front end plate | 1 |
| 11 | anvil | 1 | 24 | cylinder pin | 1 |
| 12 | hammer frame lining | 1 | 25 | cylinder | 1 |
| 13 | hammer | 1 | 26 | rotor | 1 |
Additional Components
| No. | Description | Qty | No. | Description | Qty |
|---|---|---|---|---|---|
| 27 | rotor blade | 2 | 40 | steel ball | 1 |
| 28 | Rear end plate | 6 | 41 | spring | 1 |
| 29 | End plate pin | 1 | 42 | knob limit pin | 1 |
| 30 | End plate | 1 | 43 | knob pin | 1 |
| 31 | Rear cover gasket | 1 | 44 | knob | 1 |
| 32 | screw | 1 | 45 | reverse knob | 1 |
| 33 | trigger pin | 4 | 46 | reverse valve bushing | 1 |
| 34 | trigger | 1 | 47 | reverse valve pin | 1 |
| 35 | O-ring | 1 | 48 | Air inlet bushing | 1 |
| 36 | screw | 1 | 49 | air inlet pin | 4 |
| 37 | rear cover | 1 | 50 | air closer | 4 |
| 38 | air inlet | 2 | 51 | spring | 4 |
| 39 | filter | 1 | 52 | screw plug | 12 |
MANUFACTURER AND IMPORTER INFORMATION
Manufacturer: Taizhou Lizhou Pneumatic Tools Co., Ltd
Address: Building 13, No.68 Minhe Road, Zeguo Town, Wenling City, Zhejiang Province, China. 317523
Made In China
Importers:
- WAITCHX, 250 bis boulevard Saint-Germain 75007 Paris
- FREE MOOD LTD, 2 Holywell Lane, London, England, EC2A 3ET
- EUREP UK LTD, UNIT 2264, 100 OCK STREET, ABINGDON, OXFORDSHIRE ENGLAND OX14 5DH
- EUREP GmbH, Unterlettenweg 1a, 85051 Ingolstadt, Germany
Support and E-Warranty Certificate
For support and warranty information, please visit:
Made In China
