Brake Bleeding- 7220 and 7320IMPORTANT: Avoid oil foaming during bleeding procedure. Wait one hour after operating tractor to allow oil to lose accumulated foam.
1. Start engine. Turn the steering wheel slowly lock-to-lock two or three times. Shut off engine. 2. Slide a bleed tube over each bleed screw (A). Place other ends of bleed tubes in hydraulic oil filler neck (B). 3. Open bleed screws one half turn. 4. Start engine. 5. Couple brake pedals together. Depress and hold brake pedals until the fluid escaping from the bleed screws is free of air bubbles. 6. Depress brake pedals briefly and release. Repeat several times to expel any remaining air. 7. Repeat step 5 if necessary. 8. Depress brake pedals while closing bleed screws. 9. Shut off engine. Uncouple brake pedals and depress each brake pedal several times to expel any remaining air. IMPORTANT: When each brake pedal is depressed there must be noticeable resistance before pedal reaches its limit of travel. Any downward "drift" from the point of resistance indicates brake leakage. |
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