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Forum thread: Clutch Actuator Maintenance | Page 2 | Smart Car of America Forum¶

www.smartcarofamerica.com/threads/clutch-actuator-maintenance.40415/page-2 · p. 1 · Applies to: 450, 451

Source: www.smartcarofamerica.com Topic: clutch actuator maintenance and lubrication Models discussed: 450, 451 Language: en Solution status: yes

Problem: Clutch actuator making noise (described as 'sick servo' sound) and slow/lethargic operation; some users experiencing difficulty shifting into reverse or staying in neutral.

Solution: Remove actuator from vehicle, open housing with T20 torx drive, clean internal components with brake cleaner, lubricate with white lithium grease and high-temp wheel bearing grease on pivot points, reassemble and reinstall using E10 torx bolts.

Key facts: - Actuator assembly is almost entirely plastic, including the pushrod - Factory units contain very little lubricant, contributing to noise and sluggish operation - White rubber gasket seals the cover and does not require replacement - Cleaning and lubrication improved actuator noise and shift smoothness in multiple user reports - 450 model has adjustment procedure requiring 50 newtons force with tensiometer and 3 torox screws; unclear if applies to 451 - Actuator cannot be accessed with car on lift; must be removed and serviced on workbench - Use brake cleaner for cleaning (not petroleum-based products which may damage plastic components) - Some users reported motor mount issues confused with actuator noise