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Assisted brake master cylinders
Bleeding procedure
11. Run the engine at approximately 1300 rpm and
heat the oil to operating temperature.
12. Open the two bleed screws by one turn and wait
5 minutes.
• Pedals coupled:
Fully press down and slowly release the pedals 8
times until the oil flows free of air bubbles.
• Pedals uncoupled:
Fully press down and slowly release each pedal
8 times until the oil flows free of air bubbles.
• Pedals coupled:
Fully press down and slowly release the pedals 5
times until the oil flows free of air bubbles.
13. First close the left-hand bleed screw and then the
right-hand bleed screw.
14. Press very hard (approximately 60 to 80 kg) on
each pedal to correctly position the brake pistons.
15. Check the load strength of each pedal. Coupled
pedals should not travel more than 120 mm for the
force stated above.
16. Stop the engine.
17. Remove:
- the connector and hose assembly (2)
- the pliers clamping the hose (1) (see remark at
operation 10).
In case of operating problems
If a there is a problem when operating the brakes, carry
out the bleed sequence a second time.
If the problem remains, check tightness of:
- circuit;
- master cylinders;
- piston seals.
09I02.18
(Fig.
14);
Massey Ferguson 5400 - Issue 1.a
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