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NOTE: These materials are for use by trained technicians who are experienced in the service and repair of outdoor power
equipment of the kind described in this publication, and are not intended for use by untrained or inexperienced individuals.
These materials are intended to provide supplemental information to assist the trained technician. Untrained or inexperi-
enced individuals should seek the assistance of an experienced and trained professional. Read, understand, and follow all
instructions and use common sense when working on power equipment. This includes the contents of the product's Oper-
ators Manual, supplied with the equipment. No liability can be accepted for any inaccuracies or omission in this publication,
although care has been taken to make it as complete and accurate as possible at the time of publication. However, due to
the variety of outdoor power equipment and continuing product changes that occur over time, updates will be made to these
instructions from time to time. Therefore, it may be necessary to obtain the latest materials before servicing or repairing a
product. The company reserves the right to make changes at any time to this publication without prior notice and without
incurring an obligation to make such changes to previously published versions. Instructions, photographs and illustrations
used in this publication are for reference use only and may not depict actual model and component parts.
MTD Products Inc - Product Training and Education Department
Service Manual
2005 - 250 Series - World Tiller
© Copyright 2005 MTD Products Inc. All Rights Reserved
FORM NUMBER - 769-02094
10/2005
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Summary of Contents for MTD 250 Series 2005
- Page 1 Instructions, photographs and illustrations used in this publication are for reference use only and may not depict actual model and component parts. © Copyright 2005 MTD Products Inc. All Rights Reserved MTD Products Inc - Product Training and Education Department...
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Page 3: Table Of Contents
TABLE OF CONTENTS Introduction ..........................1 Tines ............................3 Clutching Mechanism ......................4 Gearbox Removal and Replacement..................7 Gearbox Maintenance and Repair..................9 Seal Replacement .......................15... -
Page 5: Introduction
Vertical Crankshaft Front Tine Tiller Vertical Crankshaft Front Tine Tiller INTRODUCTION 1.4. Other Versions: The tiller depicted here is just one of a variety of vertical crankshaft front-tine 1.1. Disclaimer: This service manual was intended tillers currently in production. See Figure 1.4. for use by trained technicians. -
Page 6: The Disc Can Be Removed. See Figure
Vertical Crankshaft Front Tine Tiller 1.6. Different widths and tine configurations are in 1.8. The tines can be reconfigured. See Figure 1.8. production. The T-250 44cm/61cm version has a disc on the end of the tine shaft to confine trail- ings. -
Page 7: Tines
Vertical Crankshaft Front Tine Tiller TINES 2.4. There are left and right side tines, each has a different angle of attack. The tines must sweep 2.1. Disconnect and ground the spark plug wire away from the dirt as they enter it. If the tines are before servicing or adjusting the tines. -
Page 8: Clutching Mechanism
Vertical Crankshaft Front Tine Tiller CLUTCHING MECHANISM 3.5. To remove the cable, detach the cable from the handlebars by pushing the barbed bracket out of 3.1. Disconnect and ground the spark plug wire the hole. See Figure 3.5. before performing a service or adjustments to the clutching mechanism. - Page 9 Vertical Crankshaft Front Tine Tiller 3.8. Remove snap ring that attaches the cable to the 3.14. Lift the idler bracket and belt out of housing. clutch housing. See Figure 3.14. 3.9. Disconnect the cable from the idler bracket. See Figure 3.9. Snap ring Figure 3.14 Figure 3.9...
- Page 10 Vertical Crankshaft Front Tine Tiller 3.16. If it is necessary to remove the top half of the 3.20. With the engine and clutch housing removed, sheave from the engine crankshaft, apply heat to the tine shield can be lifted off of the tiller. the socket head cap screw to release the thread See Figure 3.20.
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Page 11: Gearbox Removal And Replacement
Vertical Crankshaft Front Tine Tiller 3.22. Remove the socket head cap screw and heavy GEARBOX REMOVAL AND REPLACEMENT. washer that secure the lower half of the sheave NOTE: The tiller gear box is subject to the like to the transmission worm shaft using a 3/16” kind exchange program, providing that the fail- allen wrench. - Page 12 Vertical Crankshaft Front Tine Tiller 4.3. Take note of the tine orientation, then remove 4.7. To install the replacement gearbox simply the tines. See Figure 4.3. reverse the removal process. See Figure 4.7. NOTE: When Making service-or-replace deci- sion about the gearbox, carefully evaluate the value of the tiller.
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Page 13: Gearbox Maintenance And Repair
Vertical Crankshaft Front Tine Tiller GEARBOX MAINTENANCE AND REPAIR. 5.4. When filling the gear box with the gear lube be sure that the gear box is upright position, the oil 5.1. Gearbox contains 12 fl/oz. of 85w-140 gear lube. level will come up halfway on the tine shaft. NOTE: In normal service it should not be neces- 5.5. - Page 14 Vertical Crankshaft Front Tine Tiller 5.8. Remove the shim from tine shaft inspect for any 5.10. Lift the bronze gear out of the housing after the wear to the shaft or gears. See Figure 5.8. tine shaft has been removed. See Figure 5.10.
- Page 15 Vertical Crankshaft Front Tine Tiller 5.13. To remove the seals, simply pry them up with a 5.15. When installing new bushings, press them in so heavy screw driver. that the end of the bushing is even with the See Figure 5.13. inside boss of the housing.
- Page 16 Vertical Crankshaft Front Tine Tiller 5.17. The GW-1086 bearing may be cut using a tubing 5.20. With the screw and heavy washer removed, the cutter, and dressed to clean any flash or burrs. sheave-half can be lifted away, along with the See Figure 5.17.
- Page 17 Vertical Crankshaft Front Tine Tiller 5.22. The tapered roller bearing can be pressed off of 5.26. Test fit the worm shaft assembly in the housing. the bottom of the worm shaft. See Figure 5.22. Check end-play. End play should be 0. 0-.014” (.36 mm).
- Page 18 Vertical Crankshaft Front Tine Tiller 5.31. Place the bronze gear on top of the thrust 5.34. Position the second half of the housing, and washer, confirming that the holes in the gear, the secure it using the 12 screws previously thrust washer, and the tine shaft bearing are removed.
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Page 19: Seal Replacement
Vertical Crankshaft Front Tine Tiller SEAL REPLACEMENT 6.3. After the seal is free from the transmission housing it is possible to slide the seal off by NOTE: Replacement of the seals can be done hand. without removing or disassembling the transmis- See Figure 6.3. - Page 20 Vertical Crankshaft Front Tine Tiller 6.6. Slide the seal along with the protective film or 6.8. Drive the seal home against the with Seal sleeve into the tine shaft bore in the transmis- installer tool from the Troy-Bilt tiller tine shaft tool sion housing.
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