• Remove the belt from the transmission pulley and

 

 

 

Self-Tapping Screws

engine pulley, and remove from the unit.

 

 

 

 

 

 

 

• Reassemble using a new belt, following

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

instructions in reverse order.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Engine

Center Bolt,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lock Washer &

 

 

 

 

 

 

 

Pulley

 

 

 

 

 

 

 

Flat Washer

 

 

 

 

 

 

 

 

Deck

 

 

 

Belt Cover

Self-Tapping

 

 

 

 

 

 

 

 

Pulley

 

 

 

Belt Cover

Screws

 

 

 

 

 

 

 

 

 

Drive

Belt

Idler

 

Pulley

Deck

 

 

Pulley

Figure 21

Remove the belt cover at the two outside deck pulleys, by removing the self-tapping screws. See Figure 21 .

Release the tension on the spring loaded idler by pushing the idler toward the rear of the deck.

Remove the belt from around the idler pulleys, and remove from the three deck pulleys. See Figure 21 .

Reassemble new belts, following instructions in reverse order.

Drive Belt

Depress the clutch pedal and set the parking brake.

Remove the deck from the lawn tractor.

Raise and block the front wheels of the lawn tractor so you can work under it.

Remove the transmission panel by removing the parking brake knob, relief valve rubber boot and truss machine screws.

Raise the seat. Disconnect the battery cables. Remove the battery from the unit.

Disconnect the idler pulley spring which is attached to a bracket on the frame, inside the left rear wheel. Use a spring puller or other suitable tool. See Figure 22 .

Remove the three self-tapping screws from the cooling fan. Remove the fan.

Remove the center bolt, lock washer and flat washer, and let the engine pulley drop down so the belt is past the belt guards. See Figure 22 .

Roll the belt off of top sheave of engine pulley, onto the pulley hub.

Idler

Idler

Pulley

Pulley

Transmission

Spring

 

Pulley

Bracket

Figure 22

Hydrostatic Transmission Cooling

The hydrostatic transmission is cooled by the oil, fan and fins. If the hydrostatic transmission runs hot, check to see if the fan is in operating condition, the oil level is correct and the fins are clean.

NOTE: DO NOT use high pressure water spray or steam to clean the hydrostatic transmission.

WARNING: Disconnect spark plug wire and ground against engine before performing any adjustments, repairs or maintenance work on the tractor.

Fuel Filter

Your unit is equipped with a replaceable in-line fuel filter. Replace filter whenever contamination or discoloration is noticed. Order replacement filter through your authorized engine service dealer.

Cleaning Engine & Deck

Any fuel or oil spilled on the machine should be wiped off promptly. Grass, leaves, and other dirt must not be left to accumulate around the cooling fins of the engine or on any part of the machine.

Clean the underside of the deck after each mowing.

19

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MTD 690 through 699 manual Hydrostatic Transmission Cooling, Fuel Filter, Cleaning Engine & Deck, Drive Belt

690 through 699 specifications

MTD (Motor Technology Division) has developed a remarkable series of compact tractors under the model numbers 690 through 699, which have gained popularity among agricultural professionals and hobby farmers alike. These models are designed to provide powerful, efficient, and versatile performance for a variety of farming tasks.

One of the standout features of the MTD 690 to 699 series is their ergonomic design, which emphasizes operator comfort and ease of use. The tractors are equipped with adjustable seats, intuitive controls, and clear visibility from the operator’s station, ensuring that users can work for extended periods without fatigue. This focus on comfort makes these tractors suitable for both full-time farmers and those who engage in part-time farming or landscaping.

In terms of technology, this series is fitted with advanced engine options that deliver impressive horsepower. The engines are designed for optimal fuel efficiency, reducing operational costs and environmental impact. Additionally, features like electronic fuel injection enhance performance, ensuring reliable startup and smooth operation under varying load conditions.

The transmission systems found in the MTD 690 to 699 models are engineered for versatility. Many models are equipped with hydrostatic transmissions, allowing for seamless speed and directional changes without the need for clutch engagement. This capability is particularly useful when maneuvering in tight spaces or performing tasks that require precision.

Another defining characteristic of this series is their hydraulic systems, which provide powerful lifting capabilities. This makes it easier to attach and operate a wide range of implements and attachments, from loaders to mowers, enhancing productivity on the farm. The hydraulic systems are designed with user-friendliness in mind, allowing for quick attachment changes that reduce downtime during chores.

Durability is also a hallmark of MTD's 690 through 699 tractors. Constructed with robust materials and designed to withstand harsh working conditions, they feature reinforced frames and components that provide longevity and reliability. This durability ensures that the tractors can handle demanding tasks day in and day out, making them a dependable asset for any agricultural operation.

In summary, the MTD 690 through 699 series offers a blend of comfort, efficiency, and technology, making them an attractive option for anyone looking to enhance their farming capabilities. With powerful engines, user-friendly controls, advanced hydraulic systems, and exceptional durability, these compact tractors are poised to meet the needs of today’s diverse agricultural landscape.