WARNING: Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to come to a complete stop, disconnect spark plug wire and move wire away from spark plug. Failure to follow these instructions can result in serious personal injury or property damage.

FORWARD CLUTCH

BAIL ADJUSTMENT

If the Forward Clutch Bail does not func- tion properly, first check that the forward drive belt is adjusted properly (see Check- ing and Adjusting Forward Drive Belt Ten- sion). If this fails to correct the problem, contact Troy-Bilt LLC or your authorized dealer for service advice.

CHECKING AND ADJUSTING RE- VERSE DRIVE BELT TENSION

(Models 634F/634A only)

It is important to maintain correct tension on the reverse drive belt. A loose belt will cause the tines and wheels to slow down – or stop completely – even though the en- gine is running at full speed.

When checking belt tension, also check the belt for cracks, cuts or frayed edges and replace it as soon as possible.

•Check belt tension after the first two hours of break-in operation and after every 10 operating hours.

To Check Reverse Belt Tension:

1.Stop engine, wait for all parts to stop moving and disconnect spark plug wire.

2.Remove screw in plastic belt cover and slide belt cover (which is attached to for- ward clutch cable) out of the way.

3.Have an assistant pull the Reverse Clutch Control knob all the way out and hold it in that position. Measure the length of the cable wire between the end of the threaded cable adjuster (A, Figure 5-5) and the end of the Z-fitting (B) to which the ca- ble wire is attached.

4.The belt tension is ideal if the cable wire length measures between 1/8" to 1/4". If it is less than 1/8" (and if there is no reverse action when the tiller is running), then make the following adjustments

NOTE: If the length is more than 1/4", no ad- justment is needed—as long as the reverse action functions properly.

5.Release the Reverse Clutch Control knob.and then unthread the inner jam nut (C, Figure 5-6) one to two turns. Pull the threaded cable adjuster (A, Figure 5-6) to the left until the inner jam nut (C) touches the bracket.

6.Prevent the inner jam nut (C) from turn- ing and tighten the outer jam nut (D) against the bracket. Prevent the outer jam nut (D) from turning and tighten the inner jam nut (C) against the bracket.

7.Measure the gap by repeating Step 3. Readjust as needed by repeating Steps 5 and 6.

8.Reinstall the belt cover.

A B

Figure 5-5: Measure cable wire length to check for correct reverse belt tension.

D C A

Figure 5-6: Move threaded adjuster (A) to left to increase belt tension.

Replacement Belt Information

If the drive belt needs to be replaced, see your local authorized dealer or refer to the Parts List for ordering information. Use only a factory-authorized belt as an “over- the-counter” belt may not perform satis- factorily. The procedure requires average mechanical ability and commonly available tools.

ENGINE CLEANING

Keeping the engine clean will help to en- sure smooth operation and prevent dam- age from overheating. Refer to the Engine Owner’s Manual for engine cleaning ser- vice intervals and instructions. Be sure that the muffler is cool before servicing the engine.

AIR CLEANER SERVICE

The air cleaner filters dirt and dust out of the air before it enters the carburetor. Op- erating the engine with a dirty, clogged air filter can cause poor performance and damage to the engine. Never operate the engine without the air cleaner installed. In- spect and service the air cleaner more of- ten if operating in very dusty or dirty conditions. Refer to the engine Owner’s Manual for air cleaner service intervals and instructions.

ENGINE OIL SERVICE

Check the engine oil level before each use and after every five hours of continuous operation. Running the engine when it is low on oil will quickly ruin the engine.

It is recommended that you change the motor oil after every 10 hours of operation and even sooner when operating in ex- tremely dirty or dusty conditions. Refer to the Engine Owner’s Manual for detailed service instructions.

A. To Check the Engine Oil Level:

1.Park the tiller on a level area and shut off the engine.

2.Level the engine (use the Depth Regu- lator Lever to adjust the engine angle).

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Troy-Bilt 634F, 634A, 630C manual Forward Clutch Bail Adjustment, Engine Cleaning AIR Cleaner Service Engine OIL Service
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634F, 630C, 634A specifications

The Troy-Bilt line of tillers, specifically the 634A, 630C, and 634F models, represents a blend of reliability, power, and advanced engineering designed to meet the needs of avid gardeners and professional landscapers alike. Each model boasts unique features and technologies that enhance performance and usability.

The Troy-Bilt 634A is equipped with a 6.5 HP engine, providing ample power for tackling tough soil conditions. The tiller's 16-inch tilling width allows for efficient breaking up of soil, while its impressive tilling depth of up to 8 inches ensures that garden beds are adequately prepared for planting. The 634A model features a lightweight design, making it easy to maneuver around flower beds and garden rows. Additionally, the adjustable handlebar enhances comfort during operation, accommodating various user heights.

In contrast, the Troy-Bilt 630C offers a slightly different approach. This model is designed for those who seek enhanced control and precision while tilling. It features a 6.75 HP engine and similar tilling capabilities but adds an innovative counter-rotating tilling technology. This feature is particularly useful for breaking up compacted soil and mixing in organic materials, resulting in a well-aerated and fertile garden bed. The 630C also comes equipped with a variety of attachments, allowing users to expand its functionality for different gardening tasks.

The 634F model elevates the line further with its robust frame and advanced features. With a powerful 7 HP engine, it provides optimal performance for larger plots of land. The 634F is designed with a wider tilling width of 18 inches, making it perfect for larger gardens and landscaping projects. Its self-propelled system allows for effortless movement across various terrains, reducing user fatigue. Additionally, the 634F includes a unique automatic depth adjustment feature, enabling gardeners to achieve the desired tilling depth without constant manual adjustments.

Across all three models, Troy-Bilt's commitment to user-friendly design shines through. Features such as easy-to-access controls, durable construction, and stable wheels enhance overall usability. The patented "Forward and Reverse" operating system found in these tillers ensures that gardeners can navigate easily in tight spaces, making them versatile for any gardening situation. The combination of power, advanced technology, and user-focused design makes the Troy-Bilt 634A, 630C, and 634F top choices for those looking to cultivate their garden with ease and efficiency.
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