PARALLEL ARM

PARALLEL ARM 3217 9732 08 is what keeps things moving straight on your rig's boom or feed system. Basically, it’s a critical link that ensures whatever you've got mounted – be it the feed beam, drill head, or even a service platform – stays parallel to its target plane as the main boom extends or retracts. Without it, your drill angle would be all over the place, making it impossible to maintain a consistent attack angle on the rock face. It’s a simple mechanical concept, but absolutely essential for accurate drilling.

When this parallel arm starts to wear out, usually at its pivot points, you'll notice it pretty quickly. The most common symptom is 'slop' or play in the boom movement, which translates directly to the feed beam not holding its position steady. You might see the drill head drift slightly or not track true, especially when extending or retracting the boom. Often, you'll hear it too – a distinct clunking or knocking sound as the boom moves, indicating excessive clearance in the pins and bushings. That misalignment can really mess with your hole quality and even put extra stress on other boom components.

Replacing one of these isn't rocket science, but you gotta do it right. When you're swapping out a parallel arm, don't just focus on the arm itself. Always, and I mean *always*, check the condition of the pins and bushings it connects to. If those are worn, putting a new arm on old, sloppy pins is just asking for trouble down the road. You’ll be back in there sooner than you think. Make sure everything's properly greased during reassembly; those often-forgotten grease points are there for a reason, and neglecting them shortens the life of everything in the pivot.