The block #83 can be pivoted to release the tention on the spring.

The shock should be replaced if you are flopping around. Also look at the pivot lever. As it wears out the pulley is not at right angle to the belt and will cause the pulsing that wears out a shock in no time.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician