The Kubota Aste Series mini tractor is absolutely intriguing because of its design.
Kubota’s A Series was produced between 1989 and 1997. Not only the design, but also the technologies used made this machine a timeless solution. The purpose of this blog is to share as much available information as possible because this model was never officially exported to Europe and Kubota considers individual imports from Japan to be gray market. It is very difficult to find out details about this machine. The tractor lacks the required certificates and homologations for Europe.
The Kubota Aste is a modern tractor with all the options befitting an all-rounder. Since many people ask for an explanation of the Monroematic function, we are happy to explain.
Monroematic (A15 – A19 model series) If you have an A15 – A19 model series tractor equipped with the Monroematic automation, which is primarily intended for the original rotavator, you will appreciate information on how to operate this very useful electronics.
Some more parts for this tractor
- Filter set – https://shop4trac.com/filters/filtersets/filterset-kubota-a-serie-type1/
- Light switch – https://shop4trac.com/electra-onderdelen/lichtschakelaar/lichtschakelaar-algemeen-mini-tractor-iseki-kubota/
- Clutch set – https://shop4trac.com/koppeling-transmissie/koppelingssets/koppelingsset-a-15-a-17-a-19-en-b-serie-kubota-type-1/
Operation Monroematic of Kubota ASTE series
| Function: Range of rotavator set depth maintained by Monroematic |
 |
 |
||
| Setting | Switch | This refers to the position or position of the control lever or knob for the TBZ (electro-hydraulic control | ||
| (5-8 cm) |  |
 |
 |
|
| (8-15 cm) |  |
 |
||
| (15 cm) |  |
|
||
| (10-12 cm) | |
|
||
|
 |
 |
||
Technical data of the Kubota ASTE A-15 as an example:
Engine Model: D905 Engine Specifications:
- Number of cylinders: 3
- Stroke volume: 1123 cc
- Cooling: Liquid-cooled
- Engine power: 15 hp at 2650 rpm
- Max speed: 3000 rpm
- Alternator power: 12V, 0.8 kW
- Battery: 12V, 45Ah
Transmission oil fill
- 12 liters (14 liters, shared with hydraulics)
Power steering oil
- 2.4 liters
Front axle
- 0.3 liters
Intermediate box filling
- 4 liters
Fuel tank capacity: 17 liters
Basic dimensions:
- Length: 2300 mm
- Width: 1050 mm
- Height: 1850 mm (without protective bracket)
- Ground clearance: 310 mm
- Track width:
- Front: 820 mm
- Rear: 810/900 mm after turning the wheels on the axle
- Wheelbase: 1350 mm
Front wheels: 6.00-12 Rear wheels: 8.30-20 Total weight: 695 kg
Number of gears:
- 6 forward, 1.1-13.9 km/h
- 2 reverse, 1.5-6.4 km/h (including reduction)
- 1st gear: 4.54 km/h, 1.06 km/h with reduction
- 2nd gear: 8.01 km/h, 1.88 km/h with reduction
- 3rd gear: 13.90 km/h, 3.04 km/h with reduction
- Reverse: 6.36 km/h, 1.49 km/h with reduction
Brakes
Distributed to the rear wheels, in an oil bath Clutch: Single disc, dry
Output PTO axle direction: Right (from rear, in direction of travel)
Output PTO shaft:
- 1″3/8 Z6 (6 teeth, 35 mm)
- Output shaft speed: 451 – 769 – 1171 (2650 rpm).
Rear three-point suspension
- Category 1, with two possible suspension positions for the arms, third point with three positions, lifting pins with two possible attachment points on the lower arms and three positions on the lifting pins.
Electro-hydraulic control of the right HEF arm.
Monroematic
- Additional equipment.
Operation of the dashboard of the Kubota Aste A-15
- Tachometer, hour meter: This shows the speed of the engine and the total number of engine running hours.
- Combined switch for lights and turn signals: allows control of lights and turn signals.
- Switch box: An enclosure for controlling various functions.
- Turn signal indicators: These indicate when the turn signals are on.
- Indicator lights for individual controls and functions: These lights indicate the status of various controls and functions.
- Battery charge light: This indicates the charging status of the battery.
- Oil pressure light: This warns of a low oil pressure level.
- Bulb light: This indicates when the glow plugs are operating.
- Lamp for the operation of the TBZ tilt sensor (Monroematic): Indicates whether the tilt sensor is active.
- Hydraulic control light under the handlebar – lift arms up/down: This indicates the position of the hydraulic lift arms (up or down).
- Indicator light for the operation of the Monroematic lift arm height control system depending on the rotavator depth sensor.
- Turn signal lever: This lever is used to activate the turn signals.
- Switch for lighting switching: Allows you to adjust the lighting to different modes.
- Horn: The horn is used to warn or signal.
- (It seems no text was entered for number 15.)
- Manual throttle lever: This lever allows you to operate the throttle manually.
- Controls for starting and lifting the Electrohydraulic System: Allows you to start the HEF system and operate the lifting arms.
- Clutch pedal: This pedal is used to operate the clutch.
- Brake (2 pedals connected to a clutch lever, to be used after disconnection to minimize turning radius).
- Lever for linking the brake pedals.
- Throttle.
- Enable front axle drive synchronization system and reduced speed when using the half-braked mode (to minimize turning radius). Position of lever on image – disabled.
- Locking brake pedal in depressed position (parking brake).
- Gear lever.
- Adjusting the position of the TBZ (lifting arms).
- PTO with 3 speeds, 2 neutral positions. 4th position for reverse speed.
27. Rear differential lock.
27.Reduction.
28. Four-wheel drive (4×4).
29. Adjustable elements from Monroematic.
30. Operation of retracting and extending the cylinder of Monroematic to adjust the position of the lifting arms depending on the need for tool adjustment or matching the position of the TBZ arms. Automatic tilt mode must be disabled.
Lift operation
- B – C Scales 1-7 set the position of the lifting arms for raising and lowering.
- The actual raising and lowering is controlled by the lever under the handlebars.
- The speed of lowering the lifting arms is influenced by the setting of the choke valve (26).
Monroematic
- Setting of ground depth of rotavator depending on switch (4).
- Adjustment of the extension and retraction of the hydraulic piston rod of the right arm (position relative to the left arm). The yellow field indicates the neutral horizontal position.
- Controls automatic tilt control – indicator No. 15. The yellow field represents automatic mode, the blue field indicates that automatic mode is disabled and can be set with knob No. 27.
- Controls the ground depth of the rotavator in conjunction with switch 1. Controls the automatic depth control on the rotavator. The selected value is maintained with preset accuracy. The blue zone indicates that automatic mode is disabled.
- When reversing, the arms are automatically raised (position in the picture: on).
Maintenance of engine and hydraulics
How to best care for your Kubota Aste is explained below.
Every machine needs maintenance. The more this is delayed, the more expensive and demanding the maintenance. It is therefore important to change engine oil and Hydraulics filters, for example!
Hydraulic Filter/Sieve – https://shop4trac.com/filters/hydrauliek-filters/hydrauliekfilter-kubota-2/
Gearbox hydraulic filter – https://shop4trac.com/filters/hydrauliek-filters/hydrauliek-filter-kubota/
Engine oil 15W40! – https://shop4trac.com/filters/motorolie/motorolie-15w40-iseki-kubota-yanmar-shibaura-satoh-suzue-hinomoto/
Hydraulic filter replaced!
Along with the hydraulic oil filter and therefore with the transmission oil change, it is worth checking the quality of the strainer (filter) on the gearbox output line.
If you have further questions for maintenance we would love to hear from you! We are happy to help.
Manual is available –