PC300-7 PC350-7 PC360-7 Arm Cylinder Assembly Second Arm Stick Cylinder Assembly Part Numbers 707-01-XX021 707-01-XX020 707-01-XZ982 707-01-XZ98

Arm extension and retraction – Primary function for moving the arm.

Digging force application – Generates force for digging and pulling material.

Load control – Manages the weight and position of the bucket and load.

Reach control – Determines the horizontal reach distance of the bucket.

Digging depth control – Controls the vertical depth of the bucket during digging.

Trenching operation – Essential for precise trench digging and profiling.

Lifting assist – Assists the boom in lifting operations by positioning the load.

Grade finishing – Provides fine control for final grading and leveling.

Crowd force generation – Creates the inward (crowd) force for loading.

Load positioning – Precisely positions the bucket for dumping or placing material.

Reach adjustment – Adjusts the working radius without moving the machine.

Parallel crowd function – Maintains bucket angle during arm movement (if equipped).

Breakout force contribution – A major source of the machine's breakout force.

Arm float function – Allows the arm to follow ground contours (with control valve).

Stability adjustment – Shifts the machine's center of gravity during operation.

Shock absorption – Hydraulic cushions absorb shocks from digging impacts.

Precise movement control – Enables smooth and accurate arm operation.

Cycle time optimization – Fast arm movement speeds up digging cycles.

Material handling – Used in lifting and placing pipes, rocks, or other objects.

Slope working adaptation – Adjusts arm angle for working on slopes.

Truck loading efficiency – Positions bucket accurately over trucks for loading.

Ditch cleaning – Extends and retracts for cleaning and shaping ditches.

Foundation work – Essential for excavating foundations and footings.

Demolition assistance – Positions bucket or attachment for demolition tasks.

Pressure holding – Holds position against load when controls are neutral.

Safety function &ndash– Maintains arm position in case of hydraulic system failure.

Operator control feedback – Provides feel and resistance for precise operation.

Power mode implementation – Hydraulic flow/pressure affects its speed and force.

Attachment compatibility – Works with various attachments (grapple, hammer, etc.).

Overall productivity determinant – Its power and speed are key to machine output.