Buffalo Tools GENSD7, Instruction Manual

GENSD7   7000 Surge Watts/6300 Running Watts Diesel Generator    

10  

PREPARING THE GENERATOR FOR USE 

STOP!         

The following section describes the required steps for preparing this generator for use. Failure to correctly perform these steps can 

damage this generator and/or shorten its life. If still unsure about how to perform any of these steps after reading this section, call 

1-866-460-9436 Monday - Friday, 8 AM - 4 PM Central Time for customer service. 

 
If this generator is being used for the first time, the following few steps are required to prepare it for operation: 

Step 1 - Add Oil, Then Add Diesel Fuel 

This generator requires engine oil to function. Engine oil is a major factor affecting engine performance and service life. When new from 

the package, this generator contains no oil in the engine crankcase. The correct quantity of oil is equal to the oil capacity of the engine crankcase 

and is 58 fluid oz (1.8 quart) for this Model GENSD7 7000 Surge Watts / 6300 Running Watts Portable Generator. Add the correct quantity of oil 
before operating this generator for the first time. 

 
Model GENSD7 Oil Capacity (fluid oz./ Quart) 

58 ounces (1.8 quart) 

Model GENSD7 Oil Type Recommended 

SAE 20W-40 Diesel Grade 

To add oil: 
1. Confirm that this generator is on a level surface. 

2. Open the Oil Access Panel as illustrated in Figure 1 and Figure 2. 

3. Using a funnel, add high detergent motor oil to fill the engine crankcase to the correct quantity as stated above. SAE 20W-40 Diesel Grade oil is 

recommended. When the engine crankcase is full, the oil level should reach the lower lip of the oil fill opening. 

4. Replace the oil filler/dipstick cap and close the oil access panel. 

Figure 1 – Open the Engine Access Panel 

Figure 2 – Close Up View 

Diesel Fuel and fumes are highly flammable and explosive. Handling fuel can result in serious injury or burns. 
• Do not fill the fuel tank near a heat, sparks or an open flame. Keep fuel away from appliance pilot lights, barbecues, electric appliances, power 

tools, etc. Do not overfill the fuel tank. Always check for fuel spills and immediately wipe them up. Spilled fuel is a fire hazard. 
 

To add diesel fuel, use only FRESH, DIESEL FUEL: 
1. Confirm that this generator is on a level surface. 

2. Unscrew fuel tank cap and set aside. (NOTE: The fuel tank cap may be tight and difficult to unscrew.) 

3. Slowly add fresh, diesel fuel to the fuel tank. Be careful not to fill the fuel tank above the upper limit line. The fuel tank capacity for this generator is 

4 gallon (15 L). NOTE: Because diesel fuel can expand, do not fill the fuel tank to the very top. 

4. Securely tighten the fuel tank cap and immediately wipe up any spilled fuel with a dry cloth. 
 
Model GENSD7 Fuel Tank Capacity (gals /L) 

4 Gallons / 15 Liters 

Model GENSD7 Fuel Type 

Diesel Fuel 

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