Page 72 - 05. Subyek Teknik Mesin - Automobile Mechanical and Electrical Systems Automotive Technology Vehicle Maintenance and Repair (Vehicle Maintenance Repr Nv2) by Tom Denton

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Table 1.25 Examples of workshop equipment

Equipment Common use
Ramp or hoist Used for raising a vehicle off the fl oor. A two-post wheel-free type
is shown in Fig. 1.76 . Other designs include four-post and scissor
types where the mechanism is built into the workshop fl oor
Jack and axle A trolley jack ( Fig. 1.77 ) is used for raising part of a vehicle such
stands as the front or one corner or side. It should always be positioned
under suitable jacking points, or axle or suspension mountings.
When raised, stands must always be used in case the seals in the
jack fail, causing the vehicle to drop
Air gun A high-pressure air supply is common in most workshops. Figure
1.79 shows a typical wheel gun used for removing wheel nuts or
bolts. Note that when replacing wheel fi xings it is essential to use
a torque wrench
Electric drill The electric drill is just one example of electric power tools used
for automotive repair. Note that it should never be used in wet or
damp conditions
Parts washer A number of companies will supply a parts washer and change
the fl uid it contains at regular intervals
Steam cleaner Steam cleaners can be used to remove protective wax from new
vehicles as well as to clean grease, oil and road deposits from
cars in use. They are supplied with electricity, water and a fuel to
run a heater, so caution is necessary

Electric welder A number of forms of welding are used in repair shops. The
two most common are metal inert gas (MIG) (see Fig. 1.94 ) and
manual metal arc (MMA)
Gas welder Gas welders are popular in workshops as they can also be used
as a general source of heat, for example, when heating a fl ywheel
ring gear
Engine crane A crane of some type is essential for removing the engine on
most vehicles. It usually consists of two legs with wheels that go
under the front of the car and a jib that is operated by a hydraulic
ram. Chains or straps are used to connect to or wrap around the
engine
Transmission On many vehicles the transmission is removed from underneath.
jack The car is supported on a lift (perhaps similar to that shown in
Fig. 1.76 ) and then the transmission jack is rolled underneath. An
example is shown in Fig. 1.80

fi ling
●
tapping
●
machining.
●
These aspects will be examined in a little more detail in the following sections.

1.6.2 Fitting and machining

Fitting and machining skills may be needed to complete a particular job ( Fig.
1.81 ). In the context of an automotive engineer, the term ‘fi tting’ is often used