10 SECTION 33 - BRAKES SYSTEM
CYLINDER WITH BRAKE PEDALS DEPRESSED
Pressurized brake oil
Tank oil (no pressure)
1. Oil to cylinder (right hand side)
2. Pressure switch
3. Secondary spool
4. Tank inlet
5. Primary spool
6. Cylinder body
7. Cylinder body
8. Primary spool stop
9. Balancing pipe
10. Oil to cylinder (left hand side)
As the brake pedals are depressed initial movement
of the cylinder piston closes the centre port to isolate
the tank.
Further piston movement creates brake oil pressure
to apply the brakes. The pressure ports are both
open as the two seals on both cylinders have ex-
posed the two ports, therefore allowing equal pres-
sure in both cylinders.
1
10
9 8 7
2 3 4 5
6
F29372
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