DK2 18-Inch 7 HP 208 cc Trencher Instruction Manual

1. Introduction

This manual provides essential information for the safe operation, maintenance, and troubleshooting of your DK2 18-Inch 7 HP 208 cc Trencher, Model OPT118. Please read this manual thoroughly before operating the equipment to ensure proper use and to prevent injury or damage.

The DK2 Trencher is designed for digging trenches in various soil conditions. It features a Kohler 7HP Commercial engine, direct chain drive, and high-pressure sintered 21 Tungsten Carbide quick-change cutters.

2. Safety Information

WARNING: Operating this equipment can be dangerous. Always follow safety precautions to reduce the risk of serious injury or death.

This gas-powered trencher can produce carbon monoxide, posing a risk of poisoning in enclosed spaces. Always operate in a well-ventilated outdoor area. The trencher has rotating parts that can cause injury. Use caution and wear protective equipment such as gloves and eye protection during operation and maintenance. Store fuel and the machine properly to prevent fire hazards. Always follow manufacturer instructions for safe handling, storage, and use.

• Read and understand all instructions in this manual before operation.
• Wear appropriate personal protective equipment (PPE), including safety glasses, hearing protection, gloves, and sturdy footwear.
• Ensure the work area is clear of bystanders, children, and pets.
• Inspect the trencher before each use for loose parts, damage, or wear.
• Do not operate the trencher under the influence of drugs or alcohol.
• Keep hands and feet away from moving parts, especially the trenching chain and cutters.
• Fuel handling: Store fuel in approved containers. Refuel in a well-ventilated area with the engine off and cool. Do not smoke while refueling.

Figure 1: Front view of the DK2 Trencher, showing the engine and trenching chain assembly.

3. Assembly and Setup

3.1 Unpacking

Carefully remove all components from the packaging. Verify that all parts are present according to the packing list (refer to your product's specific packing list, not provided here). Report any missing or damaged parts to DK2 customer service immediately.

3.2 Handlebar Assembly

1. Attach the handlebar assembly to the main frame using the provided bolts and nuts. Ensure all connections are secure.
2. Connect the throttle cable and other control cables to their respective levers on the handlebar.

Figure 2: Side view of the trencher, illustrating the handlebar assembly and overall machine profile.

3.3 Fluid Levels

• Engine Oil: Check the engine oil level using the dipstick. Fill with recommended engine oil (refer to engine manual for specifications) to the appropriate level.
• Fuel: Fill the fuel tank with fresh, unleaded gasoline. Do not overfill.

4. Operating Instructions

4.1 Pre-Operation Checklist

• Ensure all safety guards are in place and secure.
• Check for any loose fasteners or damaged components.
• Verify engine oil and fuel levels.
• Clear the trenching path of any obstacles, rocks, or debris. Mark any underground utilities.

4.2 Starting the Engine

1. Move the choke lever to the "CHOKE" position (if engine is cold).
2. Move the throttle lever to the "FAST" position.
3. Turn the engine switch to the "ON" position.
4. Pull the recoil starter handle firmly until the engine starts.
5. Once the engine starts, gradually move the choke lever to the "RUN" position.

4.3 Trenching Operation

• Depth Adjustment: The trencher features 5 depth positions. Adjust the trenching depth using the depth adjustment mechanism (refer to Figure 3).
• Engaging the Chain: With the engine running at operating speed, engage the trenching chain lever.
• Digging: Slowly lower the trenching chain into the ground. Allow the auto-feed auger to pull the machine forward. Do not force the machine.
• Stopping: To stop trenching, disengage the chain lever, then reduce engine speed and turn off the engine.

Figure 3: Rear view of the trencher, highlighting the depth adjustment lever and wheel assembly.

Figure 4: Detailed view of the high-pressure sintered Tungsten Carbide quick-change cutters on the trenching chain.

5. Maintenance

Regular maintenance is crucial for the longevity and safe operation of your trencher.

5.1 Engine Maintenance

• Oil Change: Change engine oil after the first 5 hours of operation, then every 25-50 hours or annually.
• Air Filter: Clean or replace the air filter regularly, especially in dusty conditions.
• Spark Plug: Inspect and clean the spark plug annually. Replace if necessary.

Figure 5: Detailed view of the Kohler 7HP engine, showing key components for maintenance access.

5.2 Trenching Chain and Cutters

• Chain Tension: Check and adjust chain tension regularly. A properly tensioned chain should have minimal slack.
• Cutter Inspection: Inspect Tungsten Carbide cutters for wear or damage. Replace worn cutters to maintain trenching efficiency.

5.3 General Cleaning and Storage

• Clean the trencher after each use, removing dirt and debris from the chain, cutters, and engine area.
• Store the trencher in a dry, secure location, away from children and unauthorized users.
• For long-term storage, follow engine manufacturer's guidelines for fuel stabilization and battery maintenance (if applicable).

6. Troubleshooting

7. Specifications

• Model: OPT118
• Engine: Kohler 7 HP, 208 cc Commercial Engine
• Trenching Depth: 18 inches (maximum)
• Chain Speed: 400 rpm
• Cutters: 21 Tungsten Carbide quick-change cutters
• Drive System: Direct Chain drive
• Product Dimensions: 18"D x 4"W x 59"H
• Item Weight: 335 Pounds
• Power Source: Gas Powered
• UPC: 826518005586

Note: Product dimensions refer to the physical size of the trencher unit, not the trench it creates.

8. Warranty and Support

The Kohler 7HP Commercial engine comes with a 3-year warranty. For specific warranty details and registration, please refer to the official Kohler website or the documentation included with your engine. For product support, parts, or service inquiries regarding the DK2 Trencher, please contact DK2 customer service.

Kohler Engine Warranty Information: kohlerpower.com/en/engines/product/command-pro-ch270

For additional assistance, please visit the DK2 Store on Amazon.