The Center-Lock Pin-Grabber Coupler for Caterpillar hydraulic excavator models 311 to 385 uses an over-center locking mechanism and two hydraulic locking features to assure positive work tool attachment.
- Remains positively closed until the operator activates the in-cab switch and extends the bucket cylinder
- Secondary lock distinctly visible from the cab for easy indication of the coupler's status
- Tools can be engaged and disengaged with the boom and stick at full extension
- Accommodates the same Cat work tools as previous versions, plus a range of other brands of buckets and tools
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