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ERENTEK LTD  •  ERENTEK PNEUMATIC SYSTEMS
Telephone: +44(0)1522 720065  •  E.mail: sales@erentek.co.uk  •  Fax: +44(0)1522 729155

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Based in one of the most productive farming counties in the UK, we enjoy a high proportion of agricultural business. Over the years, farm machinery has evolved to the stage where specialist knowledge is often required, and much of our work involves modifications to the air braking and air suspension systems found on today's vehicles. Updating an existing braking system to comply with the latest safety requirements, or installing an air suspension system, is typical of what we do. Our conversion kits each cater for a specific vehicle, and include all the necessary parts plus a layout drawing, plus all the help and advice you need. This type of work is our speciality, but we also carry out work on hydraulic braking systems, as well as general modifications to agricultural equipment in which air or hydraulics are used. We have been in this   business for many years now, and have built up an intimate knowledge of braking systems and air suspension systems. Every one of our agricultural customers benefits from our experience and personal service, and no job is too small. Our service to agriculture also includes supplying parts of course, many of which we have designed and produced ourselves, and we have a range of literature available covering most of our specialist products. We shall be listing details of these products and services to agriculture on this page, and will be adding more on a regular basis. The number in the left-hand column is the reference number of the relevant document, and should you need a printed copy, or further details, just give us a call on 01522 720065 or email sales@erentek.co.uk

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Cereals 2012 B1202, Boothby Heath near Lincoln, LN5 0AS We shall be exhibiting at the forthcoming Cereals 2012 Show on Wednesday 13th June and Thursday 14th June Stand number D504 In addition to our display of products and services, we will be using a test rig to demonstrate the operation of air brake and air suspension systems, now commonly used on agricultural trailers and crop sprayers. We will also be demonstrating a hydraulic load-sensing valve suitable for agricultural trailers. These demonstrations will be held at 11.00 AM and 3.00 PM on both days. We look forward to seeing you! For more information about the show, click here to visit the official website.

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FREQUENTLY ASKED QUESTIONS Need to solve a problem? Another project perhaps? Click here to view our "QUESTIONS AND ANSWERS" page, and read some of the questions asked by our customers. Whatever your problem, we'll find a solution.

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"Air Brakes versus Hydraulics set-ups" "Larger, faster tractors pulling bigger and heavier trailers means the demands made on braking systems are ever greater. Andy Collings looks at trailer air braking..." Read the full article about Erentek and air brake systems for agricultural vehicles.

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"SLIPPING AND SLIDING" Our local newspaper published a rather alarming story in which they describe the result of a leakage of hydraulic oil from a tractor along a three-mile stretch of road not a million miles from our office! Althought the article doesn't mention it, the tractor was towing a heavy trailer at the time, and the loss of all this fluid would have certainly drained the trailer's hydraulic braking system. We hate to say this, but - it wouldn't have happened with air brakes! You can read the article here, courtesy of the Lincolnshire Echo. (Article first appeared in the Lincolnshire Echo on Saturday 21st August 2010)

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The Irish Independent newspaper have printed a small feature about Erentek in their farming section, in which they highlight our booklet "Agricultural Tractors and Trailers used on the Public Highway" Read it HERE

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Farmers' Weekly published a four-page article on trailer brakes in which many questions were answered. Erentek was featured in the article, and you can read it HERE.

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"In-Service Assessment of Agricultural Trailer and Trailed Appliance Braking System Condition and Performance" THE AGRICULTURAL TRAILER BRAKING STUDY Prepared by Scarlett Research Limited for the Health and Safety Executive 2009 Click here to read the preliminary four-page document Click here to read the full 120-page document

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AGRICULTURAL TRAILER SERVICE and MAINTENANCE in MID-LINCOLNSHIRE We are often asked if we carry out maintenance work on agricultural trailers. We don’t do this ourselves, but we are happy to recommend our associate company, Woodcock HGV Services of Southrey, near Bardney, approximately 10 miles east of Lincoln. They are well-equipped for this type of work and have been doing it for many years. You can contact them for routine servicing, repairs, modifications, specialized installation work or diagnostics on any kind of agricultural trailer. Contact: Sam Woodcock, Woodcock HGV Services, Ferry Road, Southrey, Lincoln, LN3 5TA Telephone: 01526 397262   Mobile: 07976553283 e-mail: samatwhgv@yahoo.co.uk Click here for more information about Woodcock HGV Services

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AIR BRAKE HANDBOOK for Agricultural Tractors and Trailers Now with AIR SUSPENSION information The latest version of our handbook now includes details of air suspension systems, as well as the existing information about two-line air-pressure braking systems as fitted to agricultural vehicles. There are also references to ABS, as well as useful driver information, plus guidance notes on periodic inspections, maintenance and legal issues. Contents in brief: 1. System Features for Tractors and Trailers. This includes descriptions of the main air brake components fitted to tractors and trailers and how the system works. 2. Advisory Notes for Drivers. This section describes the safety routine for coupling and decoupling a tractor and trailer fitted with air brakes. 3. Periodic Checks, Examinations and Overhaul. Included in this section are maintenance recommendations for the air brake systems fitted to tractors and trailers. The schedule is broken down into: Driver's Daily Checks, Driver's Weekly Checks, Garage Maintenance Routine and Major Overhaul. 4. Limitations of Use on the Public Highway. This legal section deals with maximum permitted speeds and ABS requirements for tractors and trailers, depending upon vehicle weights, brakes, suspension and dates of registration. New Air Suspension supplement includes: A. The Fundamentals B. Single and Dual-Valve Arrangements C. Air Bags and General Stability D. Load-Sensing (Brakes)   E. Axle-Lift Systems F. Suspension Air-Dump Systems G. Raise/Lower Systems H. Dual-Height Facility General Maintenance and Safety Information Handbook Part No. EBK 001 Price £7.50 nett (including a set of labels as shown below) To order a handbook and set of labels... Please send your Name and Address, with Post Code, on notepaper, together with a cheque for £7.50 made payable to "Erentek Ltd." (UK and Ireland only) Or you can order by telephone on 01522 720065 (We accept Visa, Visa Electron, Mastercard, Maestro, Solo, and JCB cards) You can also contact us at: sales@erentek.co.uk

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HYDRAULIC HAND PUMP For operating hydraulic landing legs or lifting rams on agricultural trailers.

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ERENTEK AIR BRAKE CONVERSION KITS for FARM TRACTORS

Problem: Your tractor has hydraulic brakes but you need to tow a trailer with air brakes. Solution: Add a conversion kit to your tractor. One of our kits will contain all the parts you need to add trailer air-brake control to your tractor, including air compressors (belt-driven or electrically-driven), control valves, piping, couplings, layout drawings etc. We have been supplying these kits for many years, and they offer an alternative to proprietary kits (such as ECOB) at a competitive price. Just give us a call if you need any advice or information.

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HYDRAULIC BRAKE RAMS for AGRICULTURAL TRAILERS Part Nos. EBR 002 (20mm bore) and EBR 003 (30mm bore) With a flat base, for welding to a square-section trailer axle, these hydraulic brake rams includes clevis and pin, plus operating-lever return springs. Also fitted with a brake-adjustment bolt for accurate setting-up.

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HYDRAULIC LOAD-SENSING VALVE Part No. ETK 007 Designed for agricultural trailers or similar vehicles with hydraulic brakes, this is the latest version of the Erentek Hydraulic Load-Sensing Valve. It connects to the axle by means of a cable-and-spring linkage, and helps to prevent wheel-locking by sensing axle movement and adjusting the hydraulic braking pressure to match the gross vehicle weight.

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BRAKE ACTUATORS and MOUNTING BRACKETS for FARM TRAILERS

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AIR SUSPENSION PARTS for FARM TRAILERS and CROP-SPRAYERS

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Below are some of the drawings and information leaflets we have produced for our Agricultural Air Braking, Air Suspension and Lighting products. Please remember that we provide a COMPLETE SPARE PARTS BACK-UP for all the kits listed here. We can despatch parts from stock for "Next Day" delivery (UK), so if you need anything at any time, just let us know!

Click on thumbnail image to view larger size.

REF DESCRIPTION 0271FA Two-Line Trailer Air Braking Control for Agricultural Tractor or Similar Towing Vehicle This kit contains the parts necessary to install a two-line air braking trailer-control system on a towing vehicle with hydraulic brakes (eg. tractor, Land Rover, 4x4 etc.) The vehicle can then tow a trailer with air brakes, controlled by the towing vehicle's hydraulic braking circuit. Independent control of the trailer's air brakes is also possible with this system. 0286 Palm Coupling to "C" Coupling Converters These two converters fit on to the Service and Emergency air brake couplings and enable a trailer fitted with "C" type couplings to be connected to a tractor fitted with palm couplings. 0292 Two-Line Braking System with Load-Sensing for Tandem-Axle Farm Trailer A popular conversion kit, this two-line air brake system supplements the existing hydraulic brakes on an agricultural trailer. By using dual-input brake chambers, the trailer brakes can be operated either by air or hydraulic pressure from the tractor. The system also includes a combined load-sensing relay-emergency valve, shunt valve, air reservoir, air coils, line filters, couplings, colour-coded pipework and all necessary fittings. Please note that In order to obtain optimum braking performance, the load-sensing valve must be set up correctly, and not simply fitted "off-the-shelf". Therefore, before each of our kits is packed we will adjust the load-sensing valve to correspond with our preliminary brake calculations or the trailer manufacturer's specifications. 0292L Two-Line Braking System with Load-Sensing for Three-Axle Turntable Trailer A two-line air braking system for a turntable trailer with one steering axle and two rear axles. Air/hydraulic brake actuators are used, operated either by air pressure or hydraulic pressure. A combined load-sensing/relay-emergency valve is at the centre of the system, the load-sensing linkage taking a balanced reading of suspension movement from a beam across the two rear axles. Also included in the kit is a shunt valve, which allows the trailer to be moved when the air coils from the tractor are disconnected. 0321-1 Colour-Coded Handgrips for Trailer Air Coils (Palm Couplings or "C" Couplings) These handgrips fit on the ends of the two trailer air coils. Yellow for the Service line and red for the Emergency line. Connecting palm couplings, or “C” couplings, is made easier, with less risk of injury or damage. The handgrips also prevent the air coils being kinked, which could result in reduced air flow to the trailer brakes. This can happen when connecting couplings in poor visibility or in the cold. The handgrips will fit on to your existing air coils, or we can supply complete air coils with the handgrips already fitted. Suitable for 16mm or 22mm connections, palm couplings or "C" couplings. Part No. (Kit) G555 0000 0341D Rubber Joints and Adjustable Linkages for Levelling Valves and Load-Sensing Valves To connect a load-sensing valve or levelling valve to a vehicle's axle, some form of linkage is required. This consists of a metal rod with a rubber or metal joint at each end, and there are various types. This chart illustrates the most commonly-used versions. 0360D Wheel Sensor and Exciter-Ring Tester for ABS and EBS Systems A hand-held electronic testing device for the ABS and EBS braking systems found on modern farm vehicles. The tester plugs into each wheel sensor socket and carries out a series of checks on the sensor and exciter-ring (pole-ring), including sensor resistance, sensor/exciter-ring gap and exciter-ring condition. There is no need to remove the road wheels to use this tester. Part No. ESTB 02 0361A-1 Brake Calculation Sheet for Agricultural (Drawbar) Trailers When fitting or modifying the braking system on a farm trailer, it is important that the trailer should not be under-braked or over-braked, and choosing the right components is vital. This leaflet contains a diagram, plus a questionnaire for you to fill in. Your answers will then help us with our brake calculations. Click here for printable PDF version 0369-1 Trailer Wiring Diagram for 12 volt Modal ABS Colour wiring layout for a 12 volt Modal ABS system as fitted to an agricultural trailer. This uses a single modulator, with wheel sensors on one axle (2S/1M). Our diagram includes the wiring connections inside the main ABS control box and the junction box, and shows the power sockets (12N - DIN 72570), ABS warning lamp, and wheel sensors. 0373A Fitting a 12 volt ISO Socket (DIN 72570) to an Agricultural Tractor - Wiring Details In order to tow a trailer fitted with ABS braking, an agricultural tractor needs an ISO power socket. On a 12 volt system, this is a DIN 72570 socket. Our drawing shows how to wire in the socket, with pin connections and cable colours. 0375 Integrated Chassis-Mounting Bracket and Valve Assembly for Trailer Air Braking Systems This specially-made bracket and valve assembly has been designed for agricultural trailers with air brakes and air suspension. The assembly consists of a chassis-mounting bracket, plus a relay-emergency valve, load-sensing valve, ABS modulator and ECU, quick-release valves, and double-check valve. The main components are thus grouped together as an integrated unit. The whole assembly is ready to fit to a trailer chassis, and we can supply this assembly in single, tandem or tri-axle configuration, and for brake chambers or spring brakes. 0377-2 Air/Hydraulic Brake Chamber and Mounting Bracket (Fits Round Axles or Square Axles) One of our most common brake conversions is to add air brakes to an existing hydraulic system on a farm trailer. To allow the trailer brakes to be operated either by hydraulic pressure or air pressure, we use a dual-input (air/hydraulic) brake chamber to replace the hydraulic rams on the trailer axles. The brake chambers are then fitted to special axle-mounting brackets, which can be adapted to fit either round or square trailer axles. 0377-3 Air/Hydraulic Brake Chamber for Agricultural Trailers (with Dimensions) All the relevant dimensions and thread sizes for our air/hydraulic brake chamber are shown on this drawing. This brake chamber is used on farm trailers equipped with both air and hydraulic braking systems. 0377-4 Hydraulic Brake Ram for Agricultural Trailers 20mm Bore (with Dimensions) With a 150mm x 52mm flat base for welding to a square-section trailer axle, this hydraulic brake ram includes clevis and pin, plus brake lever return spring. Also fitted with a brake adjustment bolt for accurate setting-up. 0377-5 Hydraulic Brake Ram for Agricultural Trailers 30mm Bore (with Dimensions) With a 202mm x 54mm flat base for welding to a square-section trailer axle, this hydraulic brake ram includes clevis and pin, plus brake lever return springs and attachment pin. Also fitted with a brake adjustment bolt for accurate setting-up. 0389 Air Suspension Parts for Agricultural Machines This drawing highlights some of the common air suspension components fitted to agricultural equipment such as crop-sprayers and farm trailers, and includes levelling valves, air bags, raise/lower valves etc. 0390-3 Air Suspension System for Crop-Sprayers This illustration depicts a typical crop-sprayer chassis with an air suspension system fitted, and shows all the components from the air compressor to the suspension air bags. We can supply a system to suit almost any crop-sprayer or to upgrade an older machine (eg. Gem Sprayers, Frazier) 0391 Brake Operating Lever Angle for "S" Cam Brakes An important element of "S" cam brake adjustment is setting the angle between the operating lever and the brake chamber pushrod. This diagram explains the procedure, and shows how the wrong angle can lead to ineffective brakes. Also shown on the drawing is a table of pushrod thrust figures for air and hydraulic actuators. 0398A Mechanical Immobiliser for Agricultural Vehicles Mechanical immobiliser for agricultural tractors and construction vehicles which have hydraulic brakes and 12-volt electrical systems. Incorporated into the braking system, this device will help to prevent unauthorised movement of the vehicle. Also isolates the vehicle's ignition system. 0404 Tyre Inflator Kit for Agricultural Trailers If a trailer has air brakes or air suspension, ie. its own air supply, it can be fitted with this tyre inflator kit, allowing the tyres to be checked and inflated anywhere. A new permanent air outlet is fitted to a convenient point on the trailer chassis, and the tyre inflator hose screws on when required. Part No. ETI 001 0413-2 Bracket and Rubber Bobbin Kit for Load-Sensing Linkage on Tandem-Axle Trailer When a load-sensing valve is fitted to a tandem-axle trailer, the lower end of the linkage rod is usually attached to the centre of a metal balance-beam connecting the two axles. Since the axles move independently of one another, this beam cannot be fixed rigidly to either axle, and some sort of flexible mounting needs to be fitted to each end of the beam to absorb this movement. Our kit contains the necessary parts, including rubber bobbins and steel brackets ready to weld to your axles. Part No. ETK 008 0415-6 Fitting Two Load-Sensing Valves to Farm Trailer (For Air Brakes and Hydraulic Brakes) Agricultural trailers are often fitted with air brakes as well as hydraulic brakes, using dual-input brake chambers, and this means that two load-sensing valves are needed, one for each system. We can supply installation kits, with load-sensing valve and fittings, for both the air and the hydraulic braking systems, and our illustration depicts a typical tandem-axle trailer layout with the two valves installed. 0417-1 Hydraulic Load-Sensing Valve Installation on Agricultural Trailers Developed for trailers and trailed equipment, this load-sensing valve automatically adjusts the hydraulic braking pressure to compensate for changes in vehicle weight. The drawing shows how the valve is fitted and adjusted. Part No. ETK 007 0418A-2 Fail-Safe Braking System and Hydraulic Load-Sensing Valve for Farm Trailers Shown on this drawing are two safety systems for trailers with hydraulic brakes. The first system is a "fail-safe" device which automatically applies the brakes on the trailer if it is accidentally decoupled from the tractor. The second system shows our hydraulic load-sensing valve, which regulates the trailer braking pressure according to its gross weight. 0420 Load-Sensing Relay-Emergency Valve Lever Arm and Cable Settings Used extensively on trailers with air brakes and mechanical suspension, this valve combines the functions of two valves, a load-sensing valve and a relay-emergency valve. The load-sensing part of the valve includes a lever arm, together with a cable linkage to the trailer axle. The lever arm and cable must be set up properly when the valve is installed, and our drawing explains the procedure. Load-sensing valves are included in many of our conversion kits, and before each kit is packed it is our practice to adjust the settings of the valve to correspond with our preliminary brake calculations or the trailer manufacturer's specifications. 0424-1 Dust-Dispersal System for Combine Harvesters, Tractors and Balers A compressed air system for blowing dust out of radiators, knotting equipment and other dust-prone areas on vehicles such as combines, tractors and balers. A self-contained single-cylinder compressor generates the air, which is then stored in a reservoir and fed to a set of cleaning nozzles when required by means of a push-button control valve. 0424-2A Typical Air Compressor Installation with Belt-Driven Air Compressor and Air Dryer This illustrates the relationship between an air compressor, air dryer and main air reservoir in a typical layout. The air dryer has an integral unloader valve, and also uses a separate "purge" reservoir to enable periodic de-moisturisation of the dessicant material in the air dryer cartridge. 0426A "CUNA" Air Brake Couplings for Tractors and Trailers These couplings, manufactured by Bertocco, connect the air brake lines between a tractor and a trailer, and overcome one of the serious shortcomings of conventional "C" type or palm couplings, namely, being able to leave one coupling accidentally disconnected, resulting in the loss of trailer brakes! This cannot happen with CUNA couplings. They are either coupled correctly, or not at all. The tractor coupling is fitted with self-sealing valves, plus a weatherproof keeper plate, for when it is not being used. 0427 Transmission Brake Actuator for JCB Fastrac This is the spring brake actuator that applies the transmission disc brake on JCB Fastrac vehicles. We supply this unit complete with pull-rod and yoke (clevis) assembly. 0429-3 Mounting Bracket for Brake Chambers (with Dimensions) Our axle-mounting bracket for brake chambers, including the air/hydraulic type, is shown here with dimensions. This bracket can be fitted to square or round trailer axles. 0430A Air Dryers for Agricultural Vehicles Air contains water vapour which causes corrosion and shortens the life of the components inside an air brake system. To reduce this risk, an air dryer should be fitted immediately downstream of the compressor. This will remove up to 95% of the moisture content and prolong the life of the system. An air dryer can be fitted to any agricultural tractor, including Case, New Holland, Massey Ferguson, John Deere, Fendt etc., and we can supply a Bertocco unit to suit your requirements. 0436 Combined Load-Sensing Relay-Emergency Valve for Rough Terrain Vehicles A valve combining the functions of load-sensing and relay-emergency, and widely used in agricultural air brake systems. The lever arm on this valve has an extended stroke, ie. it rotates through a greater angle, and is therefore more suited to the longer suspension movement encountered on vehicles travelling over rough ground. A rod linkage, with rubber joints, connects the valve to the axle(s). These drawings describe the valve and explain the setting-up procedure. Load-sensing valves are included in many of our conversion kits, and before each kit is packed it is our practice to adjust the settings of the valve to correspond with our preliminary brake calculations or the trailer manufacturer's specifications. 0445 Air Coils and Fittings A typical arrangement of air coils and fittings, as found on agricultural trailers. Note the importance of the valve-lifter fitted to the trailer's service line coupling. 0452 Test Kits for Air and Hydraulic Braking Systems Useful kits for testing air brakes, air suspension and hydraulic braking systems. Four test kits are shown here, each in a strong case, and containing gauges, hoses and adaptors. 0453 Trailer-Control Valve (Fluid-Reaction Valve) Operates Trailer Air Brakes from Tractor Hydraulic Braking System A vehicle with hydraulic brakes (eg. a tractor) must be fitted with a trailer-control valve in order to tow a trailer with air brakes. This valve is also known as a fluid-reaction valve, and as its name suggests, it reacts to the hydraulic fluid pressure in the tractor's braking system and applies the air brakes on the trailer. The valve can also be operated by Bowden cable, allowing the trailer's air brakes to be applied independently. This drawing shows a typical installation, with a cable from the tractor's handbrake mechanism. 0456A-2 Trailer Air Brake Service Coupling Tester for "C" Type Couplings Many tractors have self-sealing valves in their air brake couplings, designed to open and close automatically. The valve in the tractor's Service coupling is opened by a valve-lifter in the trailer's Service coupling, and the operation of this valve-lifter needs to be checked periodically. This handy device simply plugs into the coupling to show how much lift is available to open the self-sealing valve. 0458B-1 12 Volt Lamp Kits for Farm Trailers Manufactured by Bertocco Lighting, these kits contain all the parts necessary to install or replace the lights on an agricultural trailer. Two rear lamp units are included (stud-mounted or magnetic attachment) plus side-marker and front-marker lamps. All cables are fitted with connectors for easy installation, including the main ISO 1724 (12N) plug, and no wiring is required. We can supply a kit to suit your particular trailer. 0459A "Air Ride" Levelling Valve Height-Control Valve for Air Suspension Systems This valve controls the flow of air into, and out of, the suspension air bags to maintain a vehicle's ride height, and is suitable for many agricultural applications, including trailers and crop-sprayers. It can be fitted left-handed or right-handed, and there is a choice of two linkage holes in the lever arm. The valve does not respond to short-duration axle movements, a feature which helps to smooth out the ride. 0464A Tractor/Trailer Air Brake "C" Couplings and Fittings This shows an exploded view of the "C" couplings, self-sealing valves and air coils, as fitted to the two air brake lines between an agricultural tractor and trailer. In order to ensure properly-working air brakes on the trailer, the correct sequence of assembly of these parts is paramount, and this drawing should help to show where everything fits. 0465-2 Air Compressor for Claas and New Holland Combine Harvesters and Balers A tough self-lubricating, belt-driven compressor to replace the units fitted to Claas, New Holland and other combine harvesters and balers. This base-mounted compressor is also suitable for other applications. 0469-2 Routine Service and Safety Reminder Labels for Farm Trailers In addition to the familiar "SERVICE" and "EMERGENCY" line markers, we have produced a set of four large self-adhesive labels outlining procedures which should be carried out to maintain safety and to protect the air brake system when towing an agricultural trailer. These labels can be attached to the trailer chassis in prominent locations. 0470 12-Volt Portable Test Kit for Trailer Lights and ABS A self-contained test kit for trailer electrics, including rear lights, indicators, brake lights, fog lights and ABS warning lamp. Powered by a re-chargeable 12-volt battery, it is housed in a strong weather-proof Peli-Case for on-site use. 0495 12-Volt Air Compressors, Single and Twin-Cylinder Designed for continuous operation, these 12-volt self-lubricating air compressors are available in both single-cylinder and twin-cylinder versions. Fitted with a quick-release air outlet connector to allow a tyre-inflator or workshop tools to be used. 0519 Hydraulic Load-Sensing Valve for Agricultural Trailers Designed for agricultural trailers or similar vehicles with hydraulic brakes, the ETK 007 Load-Sensing Valve helps to prevent wheel-locking by sensing axle movement and adjusting the hydraulic braking pressure to match the weight of the vehicle. 0525 Diesel Fuel Cut-Off Device for Agricultural Tractors This device fits into the low-pressure diesel line and cuts off the supply of fuel when a remote hidden switch is activated. Helps to prevent unauthorized use of vehicle. Operated by a 12-volt solenoid. (24-volt versions for commercial vehicles also available) Part No. EDI 03 0525A Handbrake Immobiliser for JCB Fastrac Connected into the vehicle's air brake system, this key-operated immobiliser will prevent the release of the spring parking brakes by an unauthorized person. Also immobilises the starter motor for additional security. Part No. EHBI 01 0530 Handbrake Installation Layout for Agricultural Trailer This drawing shows a typical handbrake installation on an agricultural trailer, using a ratchet handbrake lever with cables to the trailer's brake operating levers. A centrally-pivoted actuating lever (compensator) ensures equal cable tension on both sides. Part No. EHBK 001 0531 Yokes for Brake Actuators For connecting the pushrod of a brake actuator to the brake operating lever. Two types of yoke, or clevis, are shown, fixed-pin and sliding-pin. The standard pattern is the fixed-pin type, the sliding-pin type being used on trailers to allow movement of the brake-operating lever when the handbrake is applied. 0532 Air Brake Test Kit for Agricultural Trailers For testing the air brakes on a trailer without having to couple up to a tractor. Tests the Service and Emergency lines, and enables air-pressure checks to be carried out at various points in the braking system. Part No. EDT 01 0534 Fail-Safe Trailer Braking System Applies trailer brakes automatically in the event of a breakaway from the tractor. Fits agricultural trailers with hydraulic brakes. Part No. ETK 001 0535 Slack Adjuster for ADR/Colaert Trailer Axles For agricultural trailers fitted with ADR/Colaert axles and "S" cam brakes. Replaces the non-adjustable operating levers on the brake camshafts, making brake maintenance easier and quicker. Part No. ESL 32-33 0537 Hub Odometer for Agricultural Trailers Record your trailer mileage between services. Fits into the trailer hub and counts the wheel revolutions to record the total distance travelled. Will display either miles or kilometres, as specified. Many versions available to suit a wide range of tyre sizes. 0540 Air Compressor, Base-Mounted A self-contained single-cylinder air compressor suitable for a variety of purposes. Base-mounted and belt-driven. 0547 Brake Roller Testing for Agricultural Trailers Many agricultural trailers on our roads today would probably fail to achieve legal standards of braking performance if they were properly tested. It pays to have your trailer brakes serviced regularly, and preferably checked once a year on a rolling road, either at your local HGV testing station or at a suitably-equipped HGV workshop. Brake roller testing enables numerous checks to be made, including the braking efficiency of each individual wheel, brake balance and drum ovality. After the test, a detailed printout of the result is given to the customer. 0548 Weatherproof Document Holder A useful container for documents. Can be fixed in a suitable location on any vehicle, using two M8 screws. Documents are rolled up and inserted into the tube, which has a screw-on cap to keep out the weather.