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Section 7

C. Changing Hydraulic Oil Filter Element

The hydraulic oil filter should be changed after every 500 hours of operation or annually, whichever occurs first.

1.Remove the oil filter element and properly discard it. See Figure 7-3. Fill the new filter with clean oil and install the filter. Hand tighten only.

2.Run the engine at idle speed with the speed control lever in neutral for five minutes.

3.Check the oil level in the hydraulic tank. It must be 3-1/4" inches from the top of the filler neck. If necessary, add SAE 20W50 motor oil.

7.4 Engine Oil

ENGINE OIL

DIPSTICK

390S0156

Figure 7-4. Engine Oil Fill/Dipstick Location

A. Checking Engine Crankcase Oil Level

The engine oil level should be checked after every 8 hours of operation or daily as instructed in the Engine Operator’s Manual furnished with this mower.

B. Changing Engine Crankcase Oil

After the first 20 hours of operation, change the engine crankcase oil and replace the oil filter. Thereafter, change the engine crankcase oil after every 100 hours of operation or bi-weekly, whichever occurs first. Refer to the Engine Operator’s Manual furnished with this mower for instructions. See Figure 7-5.

ENGINE OIL FILTER

DRAIN

PLUG

STT99CEC

Figure 7-5. Drain Plug and Oil Filter Location

C. Changing Engine Oil Filter

After the first 20 hours of operation, replace the engine oil filter. Thereafter, replace the oil filter after every 200 hours of operation or every month, whichever occurs first. Refer to Engine Operator’s Manual for instructions. See Figure 7-5.

7.5 Engine Fuel System

DANGER

To avoid injury from burns, allow the mower to cool before removing the fuel tank cap and refueling.

A. Filling the Fuel Tank

Fill the fuel tank at the beginning of each operating day to within one (1) inch below the filler neck. Do not overfill. Use clean, fresh unleaded gasoline with a minimum octane rating of 87 and a maximum of 10% Ethanol.

DO NOT use E85 Fuel. Using E85 Fuel will cause severe damage to the engine.

To avoid personal injury or property damage, use extreme care in handling gasoline. Gasoline is extremely flammable and the vapors are explosive.

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Scag Power Equipment STT-35BVAC-SS, STT61V-35BVAC-SS, STT61V-27DFI-SS operating instructions Engine Oil, Engine Fuel System
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STT61V-35BVAC-SS, STT-35BVAC-SS, STT61V-27DFI-SS specifications

Scag Power Equipment is well-known in the lawn care industry for its high-performance mowers and commercial-grade equipment, and the STT series represents the pinnacle of their innovation and engineering prowess. Among the most notable models are the STT61V-27DFI-SS, STT-35BVAC-SS, and STT61V-35BVAC-SS. Each of these mowers combines cutting-edge technology with user-friendly features, making them ideal choices for both commercial landscapers and avid homeowners.

The STT61V-27DFI-SS mower is powered by a dependable 27-horsepower Kohler EFI engine, offering exceptional fuel efficiency and reduced emissions. This model is equipped with a 61-inch cutting deck, providing an impressive cutting width that allows for quicker mowing. The mower’s unique design includes a heavy-duty steel frame and reinforced deck for durability, ensuring it can withstand the rigors of professional use. With large pneumatic tires, it offers superior traction and stability on various terrains, making it an excellent choice for uneven lawns.

Next, the STT-35BVAC-SS mowers are notably equipped with a specialized vacuum collection system. This model is designed to tackle leaves and debris, featuring a powerful 35-horsepower engine and a versatile collection system that efficiently gathers clippings. The unique bagging system reduces the need for subsequent clean-up, allowing users to complete their tasks more efficiently. Additionally, the STT-35BVAC-SS boasts a responsive hydrostatic transmission, providing seamless speed adjustments for varied mowing conditions.

Lastly, the STT61V-35BVAC-SS combines the superior engine performance of a 35-horsepower powerplant with the impressive 61-inch cutting deck. This model is particularly favored for its dual functionalities of quality mowing and debris management. Its advanced hydraulic lift system allows for quick adjustments, ensuring the optimal cutting height for each job. Users will appreciate the ease of use, with features such as ergonomic controls and plush seating designed for extended comfort during long mowing sessions.

All three models feature Scag's renowned attention to detail, including premium blade design for a clean cut and easy height adjustments. They are also backed by Scag's commitment to customer support and robust warranty options. These mowers exemplify Scag Power Equipment's dedication to quality, performance, and innovation, making them indispensable tools for any lawn care professional or weekend warrior. Whether tackling a residential yard or a commercial landscape, the STT series delivers unmatched reliability and efficiency.
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