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Clean or replace breather. YES Breather clogged. Fluid level low. Top up to correct level. NO Replace filter cartridge. Air entering system through fluid intake filter cartridge. INTERMITTENT NOISE (BUZZING) NO Replace fluid filters. Fluid filters clogged. NO Adjust fluid level. YES Air in fluid causes noisy operation of pump. NO See point 8. YES Line pressure low. 12 YES YES YES 186 GEARBOXES ALLISON MD 3060 PR ALLISON MD 3066 PR S TRALIS AT/AD Base - January 2003 |