KPI-JCI/AMS make improvements to Vanguard jaw crusher

Crusher available in track and wheel configurations.

June 3, 2014
CDR Staff
Equipment & Products
KPI-JCI and Astec Mobile Screens (KPI-JCI/AMS), Yankton, South Dakota, has made what it calls significant changes to its Vanguard jaw crusher that are designed to reduce producer maintenance and increase energy and performance.
The Vanguard jaw crusher features replaceable wear parts to protect the equipment’s value. The Vanguard jaw crusher’s replaceable jaw die seats and replaceable barrel protector plate are two enhancements that decrease producers to the exposure of everyday wear and tear costs, according to Ron Griess, product manager for KPI-JCI/AMS.
The new generation Vanguard jaw crusher provides simpler maintenance with its jaw die wedges, the company says. With the new design, jaw die retention wedges hold the jaw die in place, providing easy access to the jaw die and efficient removal and replacement, the company explains. In addition, the new design contains lifting holes on all Vanguard jaw dies so lifting lugs are no longer required to be welded. 
Another change to the Vanguard jaw crusher is the elimination of the manual shim adjustment method to change the crusher’s closed side setting. Instead, the Vanguard jaw crusher uses hydraulic cylinders.
“This new design employs an optional hydraulic tramp iron relief system, which enables adjusting the closed-side-setting while providing overload protection from uncrushable events,” Griess says. “Allowing this convenience for producers allows them to be more successful in their operations by reducing downtime.”
The five largest Vanguard jaw crushers crush with a one-and-a-half-inch stroke, which open up wider and compress material more, allowing aggregate to get crushed and through the jaw faster. The Vanguard jaw 3055 and the 3144 are the only jaw crushers in their class with a one-and-a-half-inch stroke, according to the company.
Additionally, the Vanguard jaw crusher’s toggle plate angle gives more movement to the bottom of the pitman, resulting in more crushing per stroke, says KPI-JCI/AMS. As well, its flywheel inertia allows the crusher to function while reducing energy input. 
Components such as the common flinger collar, stress-relieved base frame and machined saddle work together to increase the machine’s lifespan. Vanguard’s jaw crusher uses the common flinger collar between the saddle block bearing and the pitman bearing. Using the same collar allows the bearings to be located close together, reducing the shaft deflection and the bending stresses – due to the rotation of an eccentric shaft, according to the company.
“Because the stresses are reduced, the Vanguard jaw crusher is able to use a smaller eccentric shaft than competitors without sacrificing bearing life,” Griess says. 
Track and wheel configurations on the new Vanguard Jaw Crusher allow producers to function efficiently and economically in tighter jobsites to process alternative materials like recycled aggregate and slag, Griess adds. This flexibility allows producers and dealers to penetrate any market.
For more information about the Vanguard jaw crusher, visit