Austin Seven Maintenance: Greasing, Brakes, Oil and Electrics

Written by Petro Olekhnovych, mobile mechanic in Aylesham, Kent

Austin Seven maintenance is little and often. The original handbook asks for weekly greasing, weekly brake checks and frequent oil changes, because these cars were designed around regular hands-on care. Keep up with the grease gun, the brake adjustment and the oil, and an Austin Seven will stay safe and reliable.

The Seven was built from 1922 to 1939, so details vary a lot between years. Always check the handbook for your model. If you are new to pre-war cars, our guide to vintage car servicing explains why they need different care from post-war classics.

The greasing routine

Modern cars have sealed joints. The Austin Seven does not. An original Austin Seven handbook lists grease gun points that should be done every week:

• Front spring shackle pins
• Rear spring pins
• Front swivel pins
• Steering cross tube joints
• The rear universal joint and the torque tube

Monthly jobs in the same handbook include the front and rear hubs, the steering worm case and the fan bracket. It also lists weekly oil can points, such as the pedal and handbrake joints, the engine controls and the brake cam spindles.

If a car is used less, it still needs grease. Dry swivel pins and shackles wear fast and make the steering heavy and vague. If a nipple will not take grease, do not ignore it. A blocked joint is a worn joint waiting to happen.

Brakes: coupled, cable operated and sensitive to adjustment

Early Sevens had four-wheel brakes, but the foot pedal worked only the rears and the handbrake worked the fronts. From 1930 the front and rear brakes were fully coupled. Either way, these are mechanical brakes. They rely on cables, rods and cams, not hydraulic fluid.

That makes adjustment critical. The handbook asks owners to examine and adjust the brakes weekly. On the model it covers, the foot brake should come fully on at about two inches of pedal travel, with the shoes clear of the drums when the pedal is up. It also says the car should not be driven if the adjustment has reached the limit of its travel.

Things that cause weak or uneven braking include:

• Stretched or sticking cables
• Seized cam spindles from lack of oil
• Oil on the linings, which the handbook warns can come from overfilling the rear axle
• Brake cams refitted the wrong way round. An Austin 7 club article notes that offset cams fitted backwards cause poor braking that is very hard to trace.

If your Seven pulls to one side, needs a long pedal push or will not hold on a slope, stop using it until the brakes are checked. Mechanical brakes give little warning before they get much worse.

The oil system and oil changes

The Austin Seven crankshaft and big ends were originally splash lubricated. Later engines fed oil to the big ends through jets from an oil gallery. Club writers call this “spit and hope”: the jets squirt oil at the crank, rather than pressure feeding the bearings like a modern engine. The oil pump runs at a quarter of engine speed and moves a large volume of oil at low pressure.

Because of this, clean oil at the right level matters. The handbook asks owners to:

• Check the oil level daily on the dipstick, with the car level and the engine stopped.
• Change the engine oil every 1,200-1,500 miles, or sooner.
• Clean the oil strainer and gauze every 2,400-3,000 miles.

Do not overfill. A club technical article warns against overfilling any Austin Seven engine. Which oil to use is a common debate, and it depends on the engine’s condition and how it has been rebuilt. Our post on classic car engine oil covers the choices.

If the oil pressure indicator stops showing pressure, or you hear knocking from the bottom end, switch off. Running a Seven short of oil can ruin the big ends quickly.

Magneto, coil and dynamo

Ignition. Early Sevens used magneto ignition. It was replaced by coil ignition in 1928, though the handbook we checked notes a magneto on the supercharged sports engine. A magneto needs its points set and timed carefully, and a weak magneto gives poor starting and misfires. Coil cars need the usual points, condenser and plug checks. The handbook gives a plug gap of 0.018 in for its model.

Charging. All Austin Seven generators were 6 volt, according to the Austin 7 club. The dynamo is gear driven from the timing gears, not belt driven. The handbook says to keep the commutator clean, check that the brushes move freely and not to oil the dynamo bearings, as they are grease packed. It also describes a summer half-charge and winter full-charge setting on the switch.

Battery. The handbook asks for a monthly check of the acid level, topped up with distilled water.

If the ammeter shows no charge when driving, the handbook says to check the dynamo field fuse first. Our post on dynamos and alternators explains how classic charging systems work.

How we can help

We are a mobile mechanic based in Aylesham, and we service and repair classic and vintage cars, including pre-war cars. We can come to your home or garage across Canterbury, Dover, Deal, Sandwich, Folkestone and the villages in between. See our classic car servicing across Kent for what that covers.

We can grease the chassis, check and adjust the brakes, change the oil, check the ignition and find faults. For a worn-out engine, we also do classic engine rebuilds in a Kent workshop.

Labour is £30-£50 per hour, depending on the job and its difficulty. We agree the price with you on WhatsApp before any work starts. Parts are extra.

Frequently asked questions

How often should I grease an Austin Seven?
The original handbook asks for most chassis points weekly and the hubs and steering box monthly. Cars used less still need regular greasing, as joints dry out.

Are Austin Seven brakes safe?
They can work well when correctly adjusted and maintained. They are mechanical, so they need regular adjustment. Do not drive the car if they pull, fade or need a long pedal push.

Is an Austin Seven 6 volt or 12 volt?
The Austin 7 club says all Austin Seven generators were 6 volt and no 12 volt systems were fitted from the factory.

When did the Austin Seven get coupled brakes?
The front and rear brakes became fully coupled from 1930.

Need help? Send a WhatsApp to 07563 350335 with your car’s make and model and we’ll come to you.

Sources

• Austin 7 (Wikipedia)
• Austin Seven owner’s handbook (scanned PDF)
• Austin 7 Club technical articles index
• Chummy Brakes?, Peter Booth, Austin 7 Club
• Generators on Austin Sevens, Alan Hale, Austin 7 Club
• Some Thoughts on the Austin 7 Magneto, Alan Hale, Austin 7 Club
• Oil Systems (1), John Bowring, Austin 7 Club
• Oil Systems (3), John Bowring, Austin 7 Club