Troy-Bilt 640C-Tuffy manual Bolo Tines, Tine Inspection, Removing⁄Installing a Single Tine

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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.

4.The gear oil level is correct if the gear oil is approximately halfway up the side of the main drive shaft.

5.If the gear oil level is low, add gear oil as described next. If the gear oil level is okay, securely replace the oil fill plug.

IMPORTANT: Do not operate the tiller if the gear oil level is low. Doing so will result in severe damage to the transmission com- ponents.

B

B

A

Figure 5-2: Remove oil fill plug (A) to check gear oil level and to add gear oil. Remove four cover screws (B) to drain gear oil.

6.If adding only a few ounces of gear oil, use API rated GL-4 or GL-5 gear oil having a viscosity of SAE 140, SAE 85W-140 or SAE 80W-90. If refilling an empty trans- mission, use only GL-4 gear oil having a viscosity of SAE 85W-140 or SAE 140.

IMPORTANT: Do not use automatic trans- mission fluid or motor oil in the transmis- sion.

7.While checking frequently to avoid over- filling, slowly add gear oil into the oil fill hole until it reaches the halfway point on the drive shaft.

8. Securely replace the oil fill plug.

B. To Drain the Transmission Gear Oil:

The transmission gear oil does not need to be changed unless it has been contaminat- ed with dirt, sand or metal particles.

1.Drain gasoline from the fuel tank or run the engine until the fuel tank is empty. See “DANGER” statement below.

WARNING: Gasoline is highly flammable and its vapors are explosive. Follow these safety practices to prevent personal injury or property damage from fire or explosion.

•Allow the engine and muffler to cool for at least two minutes before drain- ing the tiller’s gasoline tank.

•Do not allow open flames, sparks, matches or smoking in the area.

•Wipe away spills and push tiller away from spilled fuel.

•Use only an approved fuel container and store it safely out of the reach of children.

•Do not store gasoline in an area where its vapors could reach an open flame or spark, or where ignition sources are present (such as hot water and space heaters, furnaces, clothes dryers, stoves, electric motors, etc.)

2.Drain the oil from the engine.

3.Remove four screws (B, Figure 5-2) and remove transmission cover and gasket.

4.Remove the left-side wheel.

5.Tilt the left-side wheel shaft into a drain pan and allow the gear oil to drain through the top of the transmission.

6.Reinstall the wheel.

7.Install a new gasket (do not reuse old gasket) and reinstall the transmission cov- er.

8.Refill the transmission using GL-4 gear oil (SAE 85W-140 or SAE 140).

9.Refill the engine with motor oil and re- plenish the fuel tank with gasoline.

BOLO TINES

The bolo tines will wear with use and should be inspected at the beginning of each tilling season and after every 30 oper- ating hours. The tines can be replaced ei- ther individually or as a complete set. See the Parts List pages for tine identification and part numbers.

A. Tine Inspection:

With use, the tines will become shorter, narrower and pointed. Badly worn tines will result in a loss of tilling depth, and re- duced effectiveness when chopping up and turning under organic matter.

B. Removing⁄Installing a Single Tine:

1.With the engine shut off and the spark plug wire disconnected, remove the two screws (A, Figure 5-3) and nuts (B) that at- tach a single tine to a tine holder. If needed, use penetrating oil on the nuts.

2.When installing a single tine, be sure to position it so that its cutting edge (sharp) will enter the soil first as the tiller moves forward.

C. Removing⁄Installing a Tine Assembly:

1.A tine assembly consists of eight tines mounted on a tine holder.

2.If removing both tine assemblies, mark them “left” and “right” before removal. Re- move the screw (C, Figure 5-3) and lock- nut (D) that secure the tine assembly to the tine shaft. If necessary, use a rubber mallet to tap the tine assembly outward off the shaft.

3.Before reinstalling the tine assembly, in- spect the tine shaft for rust, rough spots or burrs. Lightly file or sand, as needed. Ap- ply a thin coat of grease to the shaft.

4.Install each tine assembly so that the cutting (sharp) edge of the tines will enter the soil first when the tiller moves forward. Secure the tine assembly to the tine shaft using the screw and locknut

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Contents Form no -00585C OM.fm 15/04Table of Contents Finding Model NumberCustomer Support Safety Safety Alert SymbolKeep children and pets away Refer to the Maintenance sectionsExercise caution to avoid slipping or fall- ing Use slower engine speedsOperating Symbols To Avoid Serious InjuryIntroduction AssemblyAssembly Steps Inspect UnitInstall Forward Clutch Cable Use the handlebar to roll the tiller to a flat areaWhile preventing the cable adjuster from turning With the Forward Clutch Bail Y, FigCheck Transmission OIL Level Check all nuts and screws for tightnessAture package to identify the controls on your engine FreewheelTo operate the Forward Clutch Bail Travel Position Shallow SettingsTo adjust the handlebars Stop all tiller motion by releasing the Forward Clutch BailStarting and Stopping Following steps describe how to start and stop the engineIntroduction BREAK-IN Operation Change engine oilStopping the Engine and Tiller For forward motion of the wheels and power to the tinesOperating the Tiller To move the Model 640C in reverse for short distancesTilling Tips & Techniques Clearing the Tines Tilling Tips & Techniques CON’TTilling On Slopes Read the following recommendations before tilling on slopesLoading and Unloading the Tiller Terrace GardeningCheck Hardware Transmission Gear OIL ServiceTiller Lubrication Check Tire PressureBolo Tines Removing⁄Installing a Single TineRemoving⁄Installing a Tine Assembly Tine InspectionChecking and Adjusting Replacement Belt InformationTo Check Forward Belt Tension Model 644A only Forward Clutch Bail AdjustmentEngine Cleaning AIR Cleaner Service Engine OIL Service To Check Reverse Belt TensionOFF-SEASON Storage Spark Plug ServiceSpark Arrester Screen Service To Change the Engine OilTroubleshooting Problem Possible Cause CorrectionParts List DescriptionModels 640C & 644A Models 640C & 644A GW-1325C Shim Set Incl. the following shims Front 433 Models 640C & 640A Tine Shaft Hold Tines With Blunt End Toward YouPage TROY-BILT Tiller Lifetime Limited Warranty

640C - Tuffy CRT, 644A - Super Bronco CRT, 640C-Tuffy CRT, 640C-Tuffy specifications

The Troy-Bilt 640C-Tuffy and the 644A-Super Bronco CRT are exemplary models in the realm of cultivators and tillers, merging robust performance with user-friendly features. These machines are designed to make garden preparation easier and more efficient, catering to both amateur gardeners and seasoned horticulturists alike.

The Troy-Bilt 640C-Tuffy boasts a powerful engine and features a rear-tine design, enabling the user to tackle tough soil with ease. One of its main features is the Carbide Tines that effectively break up hard ground and aerate the soil, promoting healthy growth. The 640C-Tuffy is sturdy, with durable construction that ensures longevity and resilience against tough garden conditions. It also includes a 10-inch tilling width, allowing it to cover substantial ground in shorter periods. Moreover, the model is equipped with adjustable tilling depth settings, accommodating various types of gardening tasks from breaking new ground to preparing existing beds.

On the other hand, the 644A-Super Bronco CRT highlights innovative technology that makes tilling a breeze. This model features counter-rotating tines which effectively mix compost and soil, offering improved mixing and aeration. The 644A is known for its robust performance, powered by a reliable engine, which delivers consistent torque even on challenging soil types. Additionally, its 18-inch tilling width allows for broader coverage, resulting in efficient garden preparation.

Both models are equipped with ergonomic handlebars designed for operator comfort. These handlebars are adjustable, allowing users of different heights to find a comfortable grip, thus reducing fatigue during extended use. The 640C-Tuffy and 644A-Super Bronco CRT are designed with ease of operation in mind, featuring intuitive controls and a lightweight design that makes maneuvering effortless.

In terms of maintenance, both models boast easily accessible components which allow for simple servicing and routine upkeep, ensuring long-lasting performance. Additionally, these cultivators are built with safety features, including protective shields that guard against debris.

In summary, the Troy-Bilt 640C-Tuffy and 644A-Super Bronco CRT shine in their ability to combine cutting-edge technology, user-friendly operation, and robust design, making them ideal choices for anyone looking to enhance their gardening experience. Whether preparing a new garden bed or maintaining an existing one, these cultivators are engineered to deliver exceptional results with ease and confidence.
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