Fig. 1. Section through tractor (click to enlarge)
Fig. 2. The instruments and controls (click to enlarge)
Dexta Owners Manual (Part I) |
Built into your Dexta is the experience of over 40 years designing, testing and building tractors. This book will tell you how to make the most of these qualities and ensure years of efficient and reliable service. Remember, regular maintenance is the key to reliability. A Tractor represents an investment and so does the care and maintenance it receives. Do not be tempted to save money by using inferior lubricants and fuel or by omitting maintenance tasks. Remember also there is no satisfactory substitute for genuine Fordson spares.
Your Dealer is there to help you: discuss your service problems with him. You will find him only too happy to assist and to place his very comprehensive facilities at your disposal.
We suggest that when you sit in the driving seat of your Dexta for the first time you turn to Section One of this book and check the location and function of each control. Read also -Section Two which describes fully how to use these controls for different types of work.
In the remaining sections of this book you will find the information you require to carry out the routine servicing and running adjustments on your tractor, the lubrication items being dealt with on a separate chart for quick reference.
Last but by no means least in importance you will find in the Operation and Lubrication Sections of this book a number of suggestions on "running-in" the Tractor. The importance of this cannot be over emphasized, as careful handling and servicing during this short period will go a long way to ensure that your Dexta will over many years give the satisfactory service of which it is capable.
SERVICE DEPARTMENT
TRACTOR DIVISION
FORD MOTOR COMPANY LTD
DAGENHAM
ENGLAND
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Fig. 1. Section through tractor (click to enlarge) |
Fig. 2. The instruments and controls (click to enlarge) |
You will find the various controls of your Dexta extremely light to operate and conveniently positioned relative to the driving seat which is itself adjustable for position. The attention which has been paid to every detail in designing the tractor has made possible a control layout which reduces driver fatigue to a minimum.
The instruments and warning lights are centrally placed for easy reference so, that any unsatisfactory condition which causes a warning light to become illuminated will be quickly apparent.
The various instruments and controls are shown in Fig. 2, as they are seen from the driver's seat and the function of each is described below in the order in which it is likely to be used by the operator when starting the engine to drive the tractor.
MAIN CONTROL SWITCH
This switch is key-operated and when the key is in the vertical "off" position all except the lighting circuits are isolated. The key must be turned to the right before the starter, warning lights and induction heater can come into operation. When the engine is running do not switch off the key, otherwise the warning lights will be isolated and will not be able to indicate loss of oil pressure or faulty charging of the battery. On tractors fitted with lighting equipment, the main control switch is incorporated in the centre of the lighting switch.
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FUEL SUPPLY TAP
This is located beneath the fuel tank on the left hand side of the tractor (Fig. 3) and it has three positions. When screwed fully in the fuel supply is cut off, with the tap two turns open the main fuel supply comes into operation and, when unscrewed further, the reserve supply is also available.
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INDUCTION PRIMER AND HEATER
The purpose of this device is to assist starting from cold by injecting a fine spray of fuel into the inlet manifold, where it is ignited by means of an electrical heating coil before the engine is turned over. Consequently when the starter motor is operated, burning fuel is drawn into the cylinders so that the manifold and the combustion chambers are quickly heated. The induction primer pump is located adjacent to the fuel tap and is hand operated, and the heater coil is energized by a push-button on the control panel.
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Fig. 3. Operating the Induction Primer
THROTTLE LEVER
This protrudes from the right hand side of the instrument panel beneath the steering wheel and controls the speed of the engine. It may be set to give any desired speed within the governed range. To increase the engine speed move the lever clockwise.
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STARTER CONTROL LEVER
The starter control lever is located close to the right hand side of the control panel. When the lever is pushed down, it moves the starter pinion into engagement and closes the starter switch contacts. The starter will operate only when the main control switch key is in the "on" position. Release the lever immediately the engine starts.
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ENGINE STOP CONTROL
To stop the engine, pull this control out and hold it until all the moving parts have come to rest. It is located on the control panel and when operated cuts off fuel delivery to the injectors.
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OIL PRESSURE WARNING LIGHT
This is the green light on the right of the instrument panel and it is illuminated when the main control key is switched on. The light should go out when the engine is running above idling speed, and if the light does not go out the engine should be stopped immediately and the cause investigated.
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GENERATOR CHARGING LIGHT
This is the red light on the left hand side of the instrument panel. It will light up when the key is switched on and will normally remain on while the engine is stationary or running at a low idling speed. When the engine speed is increased above idling, the light should go out, indicating that the generator is charging the battery correctly.
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WATER TEMPERATURE GAUGE
The temperature of the water in the cooling system is registered on this gauge which is located at the centre of the instrument panel. The bulb unit is positioned in the cylinder head water outlet below the thermostat.
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CLUTCH PEDAL
The clutch pedal is operated by the left foot and it disengages the engine drive from the gearbox when fully depressed. If a "live" power take-off is fitted there are in effect two clutches operated by the same pedal and there will be a distinct increase in pedal resistance after the pedal has been depressed through approximately half its travel. The first movement of approximately half the pedal travel disengages the drive to the transmission while the P.T.O. continues to operate. When the pedal is fully depressed the P.T.O. also is disengaged.
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GEAR LEVERS
A main and a secondary gear lever are operated in conjunction to select one of the six forward or two reverse gears. Both levers are located side by side in front of the driving seat, the longer lever on the left being the main lever and the shorter on the right, the secondary lever. The gear positions are shown in Fig. 4. It will be seen that 1st, 2nd and 4th forward and low reverse ratios are obtained by manipulating the main gear lever with the secondary lever pushed forward into the low position while 3rd, 5th and 6th forward and high reverse may be selected after pulling the secondary lever rearwards to the high gear position.
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Fig. 4. Gear lever positions.
BRAKE PEDALS
The two brake pedals, mounted conveniently to the driver's right foot, may be operated independently to assist turning at headlands. As a safety precaution when the tractor is operated at speed on road work the pedals should be secured together by means of the pedal locking pin. Never attempt to make sharp turns by means of the brakes when the tractor is operated at speed.
Fig. 5. Applying the Parking Brake
For parking purposes the right hand pedal can be locked in the "on" position by means of a pawl which engages with a fixed sector on the transmission housing. When parking the tractor first lock the two pedals together, engage the pawl by moving the locking latch rearwards (Fig. 5), then depress the brake pedals and allow the pawl to engage and hold the pedals down.
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PROOFMETER (Where Fitted)
The proofmeter is located in the centre of the control panel (Fig. 6) and it is driven by a cable from the rear end of the fuel injection pump. This instrument indicates not only the speed of the engine but also the total hours worked, ground speed in 1st, 2nd and 3rd gears and correct engine speeds for P.T.O. and belt pulley operated equipment. In effect therefore there are seven instruments combined into one. Engine speed may be quickly read off the outer scale which is calibrated in hundreds of revolutions per minute. Also marked are the words "P.T.O." and "PULLEY" which correspond to the British Standards Specification speeds of 536 r.p.m. and a belt speed of 3,100 ft. per minute respectively. It is therefore necessary when operating any P.T.O. or belt pulley attachment at these standard speeds to, merely place the P.T.O. lever in the engaged position and set the engine speed to the appropriate mark on the proofmeter. There are also three coloured bands marked around the face of the proofmeter, and the ground speed of the tractor in 1st, 2nd, or 3rd gear can be read off from the band corresponding to the gear being used. The "total hours" worked by the tractor are recorded in an aperture in the face of the instrument. The right hand figure registers in 1/10 hours. The working hours recorded are based on an average engine speed calculated from the varying types of work on which the tractor is employed over a period. As such they are not actual working hours but are suffi6iently accurate for normal purposes. By keeping a check on the operating hours, the operator can arrange to have the periodic services carried out at the correct intervals.
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Fig. 6. The proofmeter
THE HORN (Where Fitted)
The horn button is located at the top right hand side of the control panel. The horn itself is mounted beneath the fuel tank.
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LIGHTING SWITCH (Where Fitted)
When the tractor is fitted with lighting equipment the five position- switch is located on the lower left hand side of the control panel. The switch lever positions are as follows:
| Straight down | Off |
| First right | Side and rear lamps |
| First left | Side, rear and dipped headlamps |
| Second left | Side, rear, and main beam headlamps |
| Third left | Main beam headlamps only. |
POWER TAKE-OFF SHIFTER
The lever is conveniently placed to be operated by the left hand and is mounted on the clutch pedal pivot. It enables the drive from the engine to be engaged with the power take-off (P.T.O.) shaft which emerges at the rear of the tractor. The P.T.O. shifter should always be disengaged when the P.T.O. is not being used and it should be noted that it does no, control the drive to the hydraulic lift pump.
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MAIN CONTROL LEVER
The main control lever is the large lever operating in a quadrant attached to the right hand side of the hydraulic lift top cover adjacent to the driver's seat.
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AUXILIARY SERVICE CONTROL
This is incorporated in a plate fitted to the hydraulic lift top cover beneath the driving seat and it enables the hydraulic lift pump to be utilized to operate auxiliary equipment such as loaders, tipping trailers, earth scoops, etc.
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WORKING CONTROL SELECTOR LEVER
This is the short lever fitted to the lift cover immediately in front of the main control lever quadrant and it is used to select Qualitrol or Position Control, depending on the type of work to be carried out.
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DOUBLE ACTING RAM CONTROL
This unit is available as optional equipment and it is fitted on the hydraulic power lift cover in the place of the Auxiliary Service Control. The purpose of the valve is to enable double acting rams such as used on reversible ploughs to be operated utilizing the tractor hydraulic pump. There are two operational controls, a vertical lever located in front of the driver's seat which is used to direct the oil flow to either side of the double acting ram piston, and a flow control valve located on the valve cover which can be used to regulate the speed at which the ram will act.
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| END OF PART I |
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