McLanahan redesign Universal jaw crusher

Jaw crusher line updated for simpler maintenance, longer wear life and improved operation

THE Universal jaw crusher line from McLanahan has undergone a series of design updates to make everything from installation to maintenance a safer, simpler and smarter process.

Significant improvements have been made to the stationary jaw die. The new die design has a bevel that rests in a matched groove on the lower clamp plate and is secured by upper clamp plates with a groove to match the die bevel. Dies are also reversible to utilize more wear metal, improving their life.

For larger units, such as the 64in version, stationary wear plates are made of two dies with peaks in the middle and valleys on the outside. These dies can be used on the movable side if the right side die moves to the left side, to put the valley in the middle.

The two dies are lighter in weight compared with full-size die, and are smaller individually and easier to store. This means operators can minimize their inventory since only one set is needed to change out either side, and the stationary side typically wears out more quickly than the movable side.

The new Universal jaw crusher design features replaceable upper and lower stationary jaw die clamp plates, which are lighter, making it easier to install, replace and secure the die. Operators no longer have to rely on heavy key-wedge or heel-plate style sidelines to lock the dies in place. Additionally, all clamp plates are interchangeable if one side or top/bottom experiences more wear.

In addition, Universal jaw crushers formerly featured long, one-piece sideliners, which meant the entire part needed to be replaced when a section was worn. These have been replaced by three cheek plates per side (top, middle and bottom), which allows liners in high-wear areas to be replaced independently of other liners.

Maintenance is greatly simplified by the inclusion of several replaceable parts in the new design. The barrel liner, which protects the barrel of the pitman from rock impact and scuffing, is replaceable, as is the smash plate, which absorbs impacts and wears and deforms before the crusher frame/pitman, prolonging the life of the frame/pitman.

Moreover, in an effort to combat pitman toe wear that can lead to the need for a new pitman or extensive pitman toe re-working, the new Universal jaw crusher design features a bolt-in pitman toe for easy replacement.

When performing maintenance, the new self-aligning locking wedges are adjusted from the rear of the crusher. This area is usually allotted the most space for maintenance and means operators do not have to work around drive guards. Universal jaw crushers now come equipped with a safety pin that locks the pitman in a closed position when maintenance is being performed.

Finally, Universal jaw crushers are now designed with frames that are engineered to allow for infinite possibilities when it comes to mounting feet design and customization. With custom feet, the crusher can be tipped forward, as well as located higher and lower or forward and backward from obstructions in an existing or new structure that would normally make installation impossible.