What measurements are essential for selecting the correct replacement packing?

Selecting the correct replacement packing for jacks primarily requires understanding the specific dimensions that will ensure a proper fit and function. The plunger diameter is crucial as it directly corresponds to the size of the jack's component that will be interacting with the packing. A proper fit prevents leaks and ensures optimal performance. Depth of head is similarly important because it defines how much packing material is needed to provide effective sealing within the jack.

Inadequate understanding of these measurements can lead to issues such as insufficient sealing or premature wear. Therefore, focusing on the plunger diameter and depth of head guarantees that technicians can select packing that accommodates the specific characteristics of the jack they are servicing. This attention to precise measurements is critical for maintaining the integrity and reliability of hydraulic systems.