Vari T-20 A Manual
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Vari T-20 A Manual

Multi-purpose gearbox for single-axle tractor and rotary cultivator
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GEARBOX T–20 A
MULTI-PURPOSE GEARBOX FOR SINGLE-AXLE TRACTOR
AND ROTARY CULTIVATOR

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Summary of Contents for Vari T-20 A

  • Page 1 GEARBOX T–20 A MULTI-PURPOSE GEARBOX FOR SINGLE-AXLE TRACTOR AND ROTARY CULTIVATOR...

  • Page 2: Table Of Contents

    Instructions for ordering spare parts Warranty for the gearbox is valid only with the use of driving units supplied by VARI, a.s. Manufacturer reserves the right of technical modifications and product innovations differing from the text and illustrations presented in this manual without previous notification and with no exposure to any liabilities.

  • Page 3: Introduction

    BZN-004. Gearbox T-20 A has two gears forward and one reverse gear. Engine unit Model JM 4-003 V/T can be installed onto the gearbox by two methods. Thanks to this the gears can be perfectly used for all types of working with the gearbox. Gearbox T- 20 A with pull-axle TN-03 or TN-06, axle hinge Z-1 and suspension device BZN-004 constitutes a single-axle tractor or a rotary cultivator for active soil cultivation after the towing axle has been replaced with cultivating mechanism AKY-357/8.

  • Page 4: Technical Data

    TECHNICAL DESCRIPTION OF THE GROUPS: Gearbox Model T-20 A: Gearbox consists of two castings in which toothed wheels of gears are mounted. In the lower case of cast iron, there is worm shaft and worm wheel mounted on antifriction bearings. Hexagonals on worm wheel shaft ends serve to mount towing axle or rotary cultivators.

  • Page 5: Safety Regulations

    FIGURE 1 Gearbox Model T-20 A Gear-shifting diagram SAFETY REGULATIONS. This international warning symbol is for an important information concerning safety. On seeing the symbol, be aware of a possible injury to yourself or to other persons and carefully read the following instructions: 1.

  • Page 6: Instructions For Use

    V. INSTRUCTIONS FOR USE. Gearbox Model T-20 A can be used as a primary group for one-axle tractor (Fig. 2) or rotary cultivator for active soil cultivation (Fig. 8).
  • Page 7 Gearbox Model T-20 SA in connection with one-axle semi-trailer ANV-350 U or ANV-368 forms a set for material transport and for transporation of all working attachments and machines of the VARI-System. In this case the driving unit is mounted onto the gearbox as illustrated in Fig. 6a. For work with implements (with an exception of rotary cultivator) the first gear ratio...
  • Page 8 Travel direction USING GEARBOX MODEL T-20 A: Gearbox T-20 A can be used for working with VARI-System implements. If there is a towing axle mounted on the gear case, the result is a single-axle tractor. Wheels have free wheel hubs with a spring-loaded free wheel finger to enable four free wheel positions.
  • Page 9 Models AKY-357, AKY-358. Driving unit JM 4-003 V/T is to be mounted onto the gearbox T-20 A according to Fig. 6a. On heavier soils, it is recommended to cultivate at Gear 1, on lighter soils the cultivation can be made at Gear 2.

  • Page 10: Handling And Maintenance

    ATTACHMENTS FOR USE WITH THE GEARBOX T-20 A – connected into the suspension device BZN-004 and adjustment body NT-3: spiked harrows ABR-354, BH-138, BT-593 share cultivator AKY-356 multi-purpose weeder ELKRO P-992 two-sided plough APH-352 one-sided plough APJ-018 digger blade AVR 453 potato digger AVB 305 –...
  • Page 11 Position Part No. Ordering No. Name 22 9 3282 006 A GEARBOX Model T-20 A 106 513 Gufero 30x40x7 ČSN 029401.0 32 0 9220 028 110 504 Sealing ring 1x30 110 516 Ret. ring 40 ČSN 022931 22 9 3253 001...
  • Page 12 32 0 3014 005 110 023 Layshaft 110 518 Bearing 6201 ČSN 024636 32 0 9016 036 110 506 Plug 32 0 9620 009 106 505 Sealing 32 0 9220 026 110 501 Ring Bolt M6x12 ČSN 011143.50 106 543...
  • Page 13 22 9 1972 003 SUSPENSION DEVICE BZN-004 22 9 1846 004 107 002 Suspension with weight carrier 32 0 1956 002 107 004 Carrier weldment 32 0 1964 001 107 503 Weight 33 kg 32 0 1932 003 107 001 Weight 5 kg 32 0 9043 002 106 023...
  • Page 14 22 9 9316 032 106 024 Bolt for 610 mm 22 9 9316 033 106 027 Bolt for 480 mm 110 531 Nut M16x1.5 ČSN 021411.25 32 0 9226 001 106 029 Washer 32 0 9245 001 106 524 Split pin 22 9 1796 027 TOWING AXLE TN-06 22 9 1796021B...

  • Page 15: Warranty Terms

    22 9 1972004A HINGE Z-1 22 9 1937 001 106 002 Hinge weldment 22 9 9316 038 106 003 Pin complete 106 544 Bolt M10x75 ČSN 021101.25 106 529 Nut M10 ČSN 021401.25 Washer 10 ČSN 021740.05 106 530 CASING T-20 22 9 1846 015 110 037 Left casing...
  • Page 16 In the case of any confusions concerning the spare parts or technical issues, the VARI a.s. commercial, customer-service or technical departments are prepared to answer all your inquiries. Contact to manufacturer: VARI,a.s. Telephone: (+420) 325 607 111 Opolanská 350 Fax:...

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