Production

The 7B replaces the 7A completely, the 7A being not powerful enough.
The car with serial number 10 000 and engine number 000891 is presented for type approval which is granted on May 29th 1934.
The first 7Bs appear June 1934.

Serial numbers
The serial numbers range from 10 001 to 20 000. Some books also give 21 501 to 30 620 as serial numbers but according to the Citroën October 1934 parts manual, this is not correct.

Engine numbers
Engine numbers for 7B are as follows: XX ?? ??. Where XX is one of the following combinations: BG, BF, BJ, BK, BN, BR, BS, BT, BU, BW, BX, BY And ?? ?? are four digits.

 

Mechanical

• Front axle:
  The 7B features friction shock absorbers mounted on the front of the cradle on torsion bar extensions as on the 7A. All 7Bs have 5 stud 10" forged brake drums.

   

• Steering:
  The steering is the first type of Gremmer steering with a one bearing steering box.

   

• Engine:
  78x80mm, 1529cc, 35 hp @ 3200 rpm, topspeed 100 km/h. The 7B features a flat back water pump without the bracket for the support of the radiator. All 7B engines have "78x80" on the cylinderhead between the second and third sparkplug. The carburettor is a Solex 30 HBFD (or BFHD).

   

• Engine mounts:
  These cars all have Floating Power engine suspension. There are two suspension points. One behind the engine under the battery tray and one between the gearbox and the cradle of the front suspension. Unlike the 7A, the radiator is secured to the bridge over the front axle cradle so that it doesn't move with the engine.

   

• Gearbox:
  The gearbox has one selector shaft housing, visible on the front of the gearbox cover. On later cars you can see two of these housings. The bottom bearing housing on the front only has 4 bolts.

   

• Rear axle:
  The rear axle is round with twin locating bars. It's mounted directly to the body without the later employed extra tube. The 7B features leverarm shockabsorbers as on the 7A. Rear brake drums are 5 stud 10" forged, and secured in the same way as the front drums.

   

• Exhaust:
  On these Moteur Flottant powered cars, the exhaust passes through the right-hand-side jambonneau and then runs to a silencer mounted transversely in front of the rear axle. From the silencer the exhaust goes over the rear axle exiting at the rear of the car on the left side. The silencer is suspended with one flexible mount in the centre of the silencer. This exhaust system has a flexible section and different supports.

   

• Fuel tank:
  The fuel tank has a 39 liter capacity and has 2 filler openings, one on either side of the spare wheel.

 

Exterior

• Bumpers:
  The bumpers are the same curved ones as on all Traction Avants until 1952 with the difference that the 7B doesn't have overriders (just like other 1934 Traction Avants).

   

• Horns:
  The 7B has it's horns on the front bumper as on the 7A.

   

• Grille:
  The grille is made from copper and has a lightly curved appearance. All 1934 cars have the chevrons behind the grille. On some cars the bars and grille surround are seperate pieces.

   

• Front wings:
  The wings have a slightly lower front point and look very small but are larger then those found on the 7A.
  Width (measured along headlight support): 68 cm
  Height (measured from headlight support straight down): 29,5 cm

   

• Headlights:
  The headlights are 200mm in diameter headlights and have flat glass. The headlight supports are completely closed.

   

• Bonnet:
  On the 7B the front shutters now open at the front, but all the shutter handles are still at the rear.

   

• Windscreen surround:
  All 1934 cars have a chromed steel windscreen surround.

   

• Wheels:
  All 7s have 5 stud wheels allround. Hubcaps are secured without the center bolt. The hubcap is pressed into a ring on the wheel. Tyre sizes are 140x40.

   

• Body:
  Most 7Bs have a roof with a center section covered with moleskin. At the end of the series a full steel roof is optional. Other features are twin air inlets below the windscreen, no bootlid, flat floor without reinforcement dents and no raingutters. On the Cabriolet, there is no dickey seat lid handle. The dickey is opened by a lever on the hood tray.

   

• Doors:
  The doors are different from those found on later cars in that they don't have the trim strip and the rubber knobs are mounted in the doors, while on later cars these rubbers are mounted in the body.

   

• Rear wings:
  The wings have a very small width but are slightly wider then those on a 7A. Each wing has a hole with a curved edge for a rear light 29 cm above the bottom of the wing..

   

• Rear lights:
  Two round rear lights are located in the rear wings. The lights have a pressed steel profiled edge and flat red glass with a small "lump" in the center.

   

• License plate holder:
  The illuminated license plate holder is in the middle above the rear bumper, either mounted on the bumper or on the body. The license plate is lit by painting the digit negatives on transparent plastic, with two lights behind the plastic in the holder.

   

• Spare wheel cover:
  The spare wheel cover is made up by several pieces. One piece is put on the body, after which the wheel is placed on the body and secured. Then the outer piece is put on the wheel. A chromed steel ring with a spring in it keeps the 2 pieces together. The hubcap is put on last securing the cover to the wheel.

 

Interior

• Floor:
  The floor is flat without reinforcement dents.

   

• Dashboard:
  The dashboard has a central placed combined speedometer (130 kmh), oil pressure meter, fuel gauge (39 liter), amp meter and clock with white digits on black background and white meter hands. It also has 2 glove compartments. The lights are operated by a switch to the right of the speedometer and a ring on the steering wheel. The horns are operated by a knob in the centre of the steering wheel. The gear selector surround has arabic digits and is the same shape and size as the light switch surround. The gearlever has the same shape as on all later Traction Avants.

   

• Front seats:
  The 7B has separate front seats with bars running front to rear and top to bottom.

   

• Rear seat:
  The rear bench is upholstered the same way as the front one. Because these cars don't have a boot lid, the rear back rest can be opened, hinging at the top and secured with 2 leather straps.

   

• Door panels:
  The door panels are from the same material as the benches and have a curve stitched into them, filled with wood.

 

In October 1934 the 7B is replaced by the 7C.