400-406 Braking systems

406 Brake Data



However, this does not resolve the mystery that all 406′s are believed to have had disc brakes not drum brakes.

Master Cylinder Repair Kit Wheel Cylinders Repair Kits Brake Hose Brake Shoes
88840 KL 71410 Front 30635
Rear 83604
Front KL71490
Rear KL71529
Front KL57424
Rear KL57426
Front LB134
Rear LB135M20


The 88840 Master Cylinder was also used on a number of other vehicles, namely:

  • Austin Commercial LD1, LD01 (1 Ton), LD2, LD02 (1.5 Ton) up to chassis 16120
  • B.M.C. Commercial 1 Ton FC LDM20 1962 – 1967 & 260LD 1968- B.M.C. Prime Movers FD.2 Loader 2WL Loader
  • British Jeffrey Diamond – Wakefield Road Grader 603 1966 on
  • Conveyancer E20-20 / 6-20 (Some) / E20-20 1955 Mk XXV / E2-24, G4-24
  • E3-20, D4-24 / E4-15, G4-15 / E4-20, G5-16 / E22 RC Truck 1965 on / MkII, MkIv, MkVI
  • Coventry Climax IGY / Electrical IndustrialTractor Model-TE 1965 on
  • Universal Major Trucks Models MSD, MSDA, MSP, MSPA, MCD, MCDS, MCP, MCPA, MED, MEDA, MEP, MEPA,
  • Universal Major Electric Fork Lift Truck MSE, MCE, & MEE 1963- / Research Truck RT.812 / TLJ / UTF
    Universal Petrol & DieselFork Lift Truck IGPT, IGPTA Series II, IGDT, IGDTA Series II / IGEUS
  • Universal Major Electric Fork Lift IGET / Series I & II, IGETA Series II / Bulkloader (Mechanical Shovel)
  • Halifax Tool Company 26Hr Battery Electric Tractor1967 on
  • Lister Tractor 50cwt 4’7.5″ W.B.
  • Morris Commercial LLD1, LD01 (1 ton), LD2, LD02 (1.5 Ton) up to chassis 16120, LD4 LDOA Petrol RHD & LHD)
  • Morrison Electricars E type25 cwt. BE, E25 cwt. / BEV (Morrison BM60 & BM60 MkII 1928-
  • Trojan 15cwt, Van 1950 on / Electrojan Battery Electric 20cwt Van 1952 on / Trojan-Carrimore Articulated 1952 on
  • Trojan-Tasker Articulated 1954 on
  • Yale & Towne K51-60 Fork Lift Truck Model Yale Tractor Shovel (Throttle Control).

400-403 Wheel Cylinders


As of Sept. 2010, the following are the cheapest prices that could be found

and there were significant difference in the prices quoted and all include VAT at 17.5%

  • Rear Wheel 25453 £84 from PowerTrack Ltd.
  • Rear Wheel 34348 (The believed replacement for 25453) £74.03 from David Manners
  • Rear Wheel 34348 – possible replacement for 25453, £108.98 from Guy Broad
  • Front Wheel 25452 £45.00 from David Manners
  • Front wheel 25452 – If not in stock with David Manners, £88.71 from Guy Broad
  • Note these are also available from US Jaguar Parts suppliers
  • Rear Wheel 34348 (The believed replacement for 25453) £74.03 from David Manners
  • Rear Wheel 34348 – possible replacement for 25453, £84.00 from Guy Broad
  • Rear Wheel 34348 £75.50 Recon. Exchage Classic Brakes
  • These are also available from US Jaguar Parts suppliers

405-406 Wheel Cylinders


Again, the latest prices as of September 2010 were as follows:

  • Front wheel 30635 £59.00 from David Manners
  • Front wheel 30635 – Jaguar XK 120 late available from Guy Broad
  • 30635 £68.50 Recon. Exchange Classic Brakes
  • These are also available from US Jaguar Parts suppliers

We have yet to compare the 1 1/8″ 401 rear 25453 and the 1 1/8″ 405 rear 83604 to see if the only difference is the handbrake lever?

Brake Master Cylinders


The XK120 early/single brake system Master cylinder looks the same as the Bristol Master Cylinder. An unknown person has apparently tried one but legend has it that it didn’t fit. However, it is not known which Jaguar Master Cylinder was tried. Nevertheless they still look identical and this is still worth exploring. It may be that just the bodies are the same as it uses the same KL71410 repair kit – has anyone physically compared the two?

Brake Shoes


Brake Pads for the 406

Brake pads for the 406 are often listed on EBay. However, as an alternative, EBC state they are the Manufacturers of the World’s largest Range of Brakes. For more information see EBC Brakes Direct or Tel:0845 225 5011.

406 Servo

Servo Data (from a Lockheed list)

  • There seems to be some cross information in the Lockheed catalogue, as elsewhere the unit listed below is shown as for the 407 and below (4257- 551) as the correct unit for a 406.
  • “Major Repair Kit” – includes the items that should be replaced whenever the unit requires servicing regardless of cause.
  • “Piston Packing Kit” – includes parts which must be used, in addition the parts included in the major repair kit, if the leather Piston Packing needs to be replaced.
  • “Air Control Valve Kit” – consists of a sub-assembly of the end cover, valve and air pipe to be fitted as a complete unit each time a valve requires replacement.
Servo Unit Repair Kit
V4257-567 Major Repair Kit SSB.72573
Piston Packing Kit KL 72523
Air Control Valve Kit 72525



(See also 407 LOCKHEED SERVO 4257-567)

The Jaguar XK 150 Servo 4257-552 is much the same as the Bristol one but we have yet to work out the exact difference and whether or not it actually makes any difference in use?

4257-552 units are available from David Manners. for £480 including vat (Jan 2011).
406 Servo Kits & Parts are also available from J & L Spares Export Ltd.

The remote brake servo kit enables the fitting of a remote brake servo to cars which do not have one, and enables the easy replacement of non-functional or obsolete servos. Boost ratio 1.9:1 Measures approx 224mm length by 189mm diameter. The beauty of a remote servo is that fitting requires no interference, modification, or change to the existing brake master cylinder. As well as being a suitable fitting for all single circuit cars lacking a servo (and kit cars), it is also a direct replacement for remote Girling Powerstop servos fitted to Austin, Bedford, Ford, Hillman, Land Rover, Lotus, MG, Morgan, Morris, Singer, Talbot, Triumph to name a few, covered by the Girling part numbers 64949023, 64949077, 64949178, 64949354, 64949330, 64949000. Supplied as a kit complete with brackets, hose, connections, instructions etc. Please note that if fitting to a modern car with twin circuit brakes, then you will need twin servos.

Fitting instructions for a remove servo


Remote servos are available from Ratsport, among other sources.

2 litre wheel and axle bearings

There is no “where used or used on” section in the attached catalogue, but a lengthy search through the catalogue is under way to find out what other vehicles the bearings where used on. This will take some time to finalise.  In the meantime if you want a specific information on bearing please contact on of our technical coordinators.

Just one supplier (so far) has been found for bearings, Simply Bearings. However, 401 front & rear bearings are sometimes listed for sale on EBay.