Spring (Blocking Bar) - Replace
Note: Replacement of the blocking bar spring requires the removal of the work tool.
- Position the work tool on the ground in front of the machine.
- Uncouple the work tool. Refer to Operation and Maintenance Manual, "Operation" for information on uncoupling the work tool.
- Extend the bucket cylinder in order to position the work tool completely under the stick.
- Move the electric switch for the quick coupler to the LOCK position and then hold the control lever for the bucket cylinder in the EXTEND position for 5 seconds in order to lock the self-securing hook (3). The blocking bar (1) will rotate downward and the blocking bar (1) will rest on the blocking bar's stop pin.
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| Illustration 1 | g01175907 |
Hydraulic Pin Grabber Quick Coupler (1) Blocking Bar (2) Blocking Bar Spring (3) Self-Securing Hook | |
- Position the quick coupler on the ground.
- Stop the engine on the host machine. Remove the engine start switch key before exiting the machine. Refer to the Operation and Maintenance Manual of the host machine for additional information.
- Remove the three bolts and washers (4) for the blocking bar spring (2) and remove the blocking bar spring (2) .
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| Illustration 2 | g01176138 |
- Position a new blocking bar spring (2) onto the blocking bar (1).
- Install the three new bolts and washers (4) that were supplied with the new blocking bar spring (2) .
- Tighten the three bolts (4) to 40 N·m (30 lb ft).
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