DA7C Technical Forum
A Replacement Annual Safety Check
Section 1: Lamps, Reflectors and Electrical Equipment.
Things to check:
· Headlights—dip and main. (Single dippers not legal)
· Sidelights, tail lights & reflectors
· Stop lamps (>1936 only)
· Indicators (>1936 only) (semaphores must illuminate)
Comments:
· Fit additional earth wires for each bulb direct to chassis or good earthing point
· Halogen bulbs not necessarily better and heavy on amps (esp. 6v). More success using a relay instead of the master light switch. See Gary Fatt for parts and wiring.
Section 2: Steering and Suspension
Things to check:
· Free play at steering wheel less than 3 inches (wheels on ground)
· Tightness in lock-to-lock steering (wheels off the ground)
· Track rod ends
· Broken, missing or misaligned leaf springs; worn spring eyes; wheel bearings (sideways movement); King pins (vertical movement)
Comments:
· Check all split pins
· Tighten king pin cotter pin
· The new double front shock absorbers are a good thing (a cheaper fix is to bolt one end of shock absorber directly to axle.)
· Check radius arms bracket and cups
· Essential to check for a cracked steering arm (or replace new from D Cochrane just to be sure)
· Check steering arm ball joint (see website for mod)
· Check torque tube anchoring point (large star nut)
Section 3: Brakes
Things to check:
· Handbrake, general brake efficiency, pulling to the side under braking
· Rubber cover on pedal
Brake linings > 1.5mm (above rivets)
· Cables and clevis joints. (Only 1 adjuster allowed per cable)
·Loose back plate
Comments:
· Check for front cables locking-up wheels on turn
· Give a slight rear-brake bias
·
Check brake levers are perpendicular to cables· Get someone else to drive the car for comparison
· Tapley Meter house brick test: if a house brick (frog rearwards) on its side falls over when the brakes are applied at 20 mph, that's about 50%, (foot brake) and if it falls over when stood on end it's about 25% efficient (handbrake) and these are within test limits.
Section 4: Tyres and Road Wheels
Things to check:
· Spokes loose, bent or corroded
· Missing wheel studs
· Tyres for lumps, bulges, cracking, cuts, exposed cords & poor seating on the rim
· Tread depth (1.0mm <1933; 1.6mm >1933) & a complete pattern across the whole tread width.
Comments:
· Check the tracking with a home-made frame or a “Gunson Trakrite” tracking plate (see YouTube for demo!) still available—about £45 on E-bay.
· Tyre pressures officially 22-24 psi but some members use 26 psi or even higher to counter soft-walled (elderly?) tyres.
· Don’t ignore the spare—it might have to be used and then you could be breaking the law.
Section 5 covers seatbelts
Section 6: Body, Structure and General Items
Things to check:
· All body to chassis fixings for corrosion, damage, fracture or inadequate repair including suspension units within 30 cms.
· Body for sharp edges
· Seats for secure fittings
· Speedometers are required after October 1937 and must be capable of illumination (and are working)
Section 7: Exhaust, Fuel and Emissions
Things to check:
· all fuel lines, fuel tank, carburettor etc for fuel leaks
· Fuel filler cap must have rubber seal
Comments:
· Front tank seals are extremely important
· Use Ethanolmate (through the club) or Ethanolmix (Frost’s)
· Check exhaust pipes/silencer for leaks as these reduce power.
Section 8: Driver’s View of the Road
Things to check:
· Damage to windscreen must be contained in a 10 mm circle
Comments:
· Pre-1978 need only have 1 rear-view mirror (external or internal)
· There must be no stickers within the swept area
· Wipers & washers are not required in cars with opening windscreens
Conclusions:
Whilst members were split roughly 50-50 on whether to use a garage for either a full MOT or new Annual Safety Check, or do their own servicing, in case of an accident, insurers will be checking the vehicle very carefully and its service record. Clearly, a professional check will carry more weight.
You can download a copy of the MOT Testers Manual from www.transportoffice.gov.uk/crt/doitonline/bl/mottestingmanualsandguides/motttestingmanualsandguides.htm