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Glossary of terms you will come across during your Phase 2 training.


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Electronic Acclerator Control. With Fords, if there is a problem with this control, 'EAC fail' will flash on the dashboard. A P code  such as P2135 will trigger such an event.
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Ear defendersIf your workplace is noisy, up to a level of 85 decibels, you can wear ear plugs.

As a rough rule if thumb, if your workplace is so noisy that you must shout to make yourself heard, then you must wear some form of ear protection. Up to 85 decibels, ear plugs will suffice. Over this level, you must wear ear defenders.

There is always a plentiful supply of fresh, clean, sterile ear plugs in the workshops. In addition, during induction, you will be issued with a pair of ear defenders.

If you are unsure about the level of noise where you are working, then it is best to wear ear defenders.

REMEMBER: NOISE INDUCED HEARING LOSS IS PERMANENT AND IRREVERSIBLE

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Ear plugsIf your workplace is noisy, up to a level of 85 decibels, you can wear ear plugs.

As a rough rule if thumb, if your workplace is so noisy that you must shout to make yourself heard, then you must wear some form of ear protection. Up to 85 decibels, ear plugs will suffice. Over this level, you must wear ear defenders.

There is always a plentiful supply of fresh, clean, sterile ear defenders in the workshops. In addition, during induction, you will be issued with a pair of ear defenders.

If you are unsure about the level of noise where you are working, then it is best to wear ear defenders.

REMEMBER: NOISE INDUCED HEARING LOSS IS PERMANENT AND IRREVERSIBLE

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Typical generator with earch rod.Electricity wants to run to ground. If there is a malfunction, and you get yourself between the electricity and ground, it will use your body to run to ground.

When this happens, you will be burned at the point of contact with the supply, and burned where the supply leaves your body and enters the ground (usually the soles of your feet).

The reason why you get burned is that one of the three effects of electricity is heat, and where you touch an electrical supply and where it leaves your body are usually bad connections, hence the waste heat and the burns.

If the voltage is sufficiently high, and the amount of current is enough, you can be killed. It takes less than half an ampere of electricity to kill you.

For those reasons, you will often encounter safety electrical earths - earth rods driven into the ground, and connected into electrical supply. In the event of malfunction, the electricity has a path directly to earth (the earth rod), which it will take in preference to using your body. A typical earth rod is shown in the picture here, with the portable generator.

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  • Exciter shaft from the Bomag plate compactorEccentric means off-centre
  • Mass is a measure of the amount of matter in a body. It is measured in kg.
  • Eccentric Mass is an off-centre mass

Eccentric masses are used in plant machinery whenever we want to produce out-of-balance forces such as those in vibrating machinery - the Bomag Plate Compactor (the exciter shaft), the Bomag double-drum roller or in vibrating pokers.

The image on the right here is of the exciter shaft from a Bomag Plate Compactor.

There are massive out-of-balance forces produced by these shafts when they are driven at speed. This sets up massive radial loads on shaft which must be supported by bearings. There are no axial loads on the shafts and bearings, only radial loads, and for this reason, it is mostly ball bearings and roller bearings which are used to support these shafts.

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From their website:


ECI JCB have been distributors for the full JCB Product Range in Ireland for over 28 years. We distribute the JCB Agricultural and Industrial product ranges exclusively. This means 100% total dedication to customer parts and service backup for all JCB machines.

JCB have been making machines for more than 66 years, the Company has 6 factories in Staffordshire, England, where all machine components are manufactured. The extensive Product Range includes Telescopic Loadalls, Fastrac Tractors, Wheeled Loaders, Tracked Excavators, Mini Excavators, Rough Terrain Forklifts, Skid Steer Loaders and Teletruk Industrial Forklifts.

ECI JCB operates from modern, purpose built facilities at Aerodrome Business Park, Rathcoole, Co Dublin, ECI JCB Agri at Kilkenny and at Carrigtwohill Co Cork. Read More...

Company Contacts:

Apprentices:

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Engine Coolant Temperature (Sensor).
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 In the context of plant machinery, electronic control units: the "black boxes" that contain the electronic control circuitry that communicates with sensors throughout the vehicle, receives and processes information from those sensors, and based on the results of that processing, may send electronic instructions back to that or other sensors on the vehicle.
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Company contact for O'Brien Tool Hire Ltd.

Contact details:

  • Landline - 052 744 1666
  • Mobile - 086 818 3593
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Illustration of eddy currentAny flow of electricity always has an associated magnetic field.

In devices like ignition coils, we depend on the rapid collapse of the magnetic field associated with current flow through the primary windings in order to induce a HT spark in the secondary windings.

We must use a soft iron core in coils (and alternator rotors and starter motor armatures) in order to concentrate magnetic flux in places where it can do useful work.

The problem with this is that this magnetic flux moving across the soft iron will also have the effect of inducing electricity in the soft iron. This induced electricity will have its own associated magnetic field which are magnetic swirls similar to eddy swirls or currents which can be observed in the flow of a river.

These eddy currents and their associated magnetic fields can seriously disrupt the operation of electrical devices.

In ignition coils, they can slow the collapse of the magnetic field around the primary windings, thus seriously imparing the induction of a HT spark in the secondary windings.

In alternators and starter motors, these currents can produce significant drag on the rotor in the case of alternators, and drag on the armature in the case of motors.

Eddy currents are currents induced in conductors, and they oppose the change in flux that generated them in the first place. They are caused when a conductor is exposed to a changing magnetic field due to relative motion of the field source and conductor.

Taking a deeper look at ignition coils, the function of the soft iron core is to concentrate the magnetic flux around where it is most useful - around the primary windings and the secondary windings.

When we switch off the primary circuit, what we want is a rapid collapse of the magnetic field around both sets of windings. This will ensure we get a high quality spark in the secondary circuit. However, the collapsing magnetic field, as well as having the desired effect, will also induce magnetic fields in the soft-iron core which oppose the magnetic field that generated them in the first place (Lenz's Law). This opposition would slow down the rate of collapse of the magnetic field around the coil windings, and this would reduce the quality of the spark. 

Laminated iron coreIn order to minimise this effect, rather than use one solid mass of iron for the core of the coil, we use laminated strips of iron. 

Without these laminations, a circulating flow of electrons, or a current, will be induced within the body of the soft-iron core. These circulating eddies of current generate induced magnetic fields that oppose the change of the original magnetic field (Lenz's law). These opposing forces slow down the rate of collapse of the magnetic field around the coil windings, thus reducing the quality of the induced HT spark.

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Please note, if you want to contact the main Training Centre in Baldoyle, you need to ring 01-8167400.


If you want to contact the CP Fitters' Section, you can Contact Us by email, admin@cpfitters.info, or by telephone: 00 353 1 8167543 This number gets you through to the CP Fitters' Section, Baldoyle Satellite Unit.

Our Address is : Construction Plant Fitters' Section, Unit 116, Grange Way, Baldoyle Industrial Estate, Baldoyle, Dublin D13 CA48.
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