VMA Tiffy

Certainly the armoured units I served with namely QRIH, 5RIDG, 3 & 4 RTR, QOH, 13/18 H (QMO) and the Sultan of Omans Armoured Regiment named their armoured vehicles. all beginning with the letter of the Sqn. The HQ ARV was called Lucozade...as it aids recovery (as an old advert goes)...

Hi,

 

Does the Chieftain's main brakes need the engine running to work?

On Sunday I was asked to remove the master cylinder out of our Chieftain and strip and clean it. Apparently the thing was siezed.

So I stripped the moving parts down, cleaned them up, and re-assembled them. All moving smoothly. I haven't touched the hydraulic side of the master cylinder yet.

When I re-installed the cylinder I tried the pedal and it was still solid. The pedal itself is quite stiff, but I can't see this being a problem.

 

Any thoughts?

Hi Caddy

Haven't done it for a long time and if my memory serves me right, the master cylinder will be solid until you start the engine and then it will depress slightly as the pressure is dissipated around the system. The 'M' type pump will probably need bleeding and the accumulator fully charged with air (30 bar? or was it 30psi?). The accumulator will provide an emergency operation of the brakes in case of engine failure. The whole system will need bleeding and this is done with the engine running. Hope this is helpful.