09260298 (Diaphragm / Partition)

1. Core Specifications

• Part No.: 09260298 / 9260298 (Genuine /Tamrock)
• Name: Diaphragm / Rubber Partition
• Material: Black synthetic rubber with excellent oil resistance and aging resistance
• Dimension: Approximately Ø140×60mm, flange type with thick rubber rim for installation
• Weight: About 0.4 kg
• Working Pressure: Suitable for medium and high pressure hydraulic systems of rock drills
• Operating Temperature Range: -30℃ ~ +120℃

2. Compatible Models

• DD Series: DD210, DD322i, DD422i, DD422iE
• DL Series: DL311, DL422i, DL422iE
• Rock Drills: HLX5, HL1010, COP series and more
• Other Equipment: Hydraulic units of selected LH loaders and Pantera surface drill rigs

3. Functions

• Pressure isolation: Separates hydraulic chamber and compensation chamber, transmits pressure and prevents cross-flow of hydraulic oil.
• Shock absorption: Absorbs high-frequency impact and vibration of rock drills to protect valve bodies and seals.
• Sealing and pressure retention: Maintains stable pressure in feed and impact circuits and reduces oil leakage.
• Volume compensation: Expands and contracts with piston movement to compensate for volume change of hydraulic oil.

4. Appearance Features

• Overall structure: Black rubber disc with a shallow recess at the center and an extra-thick flange rim on the outer edge.
• Surface design: Smooth surface with reinforced partial texture, featuring good resistance to oil, aging and tearing.
• Installation: Fixed by 4 to 6 bolt holes on the flange, compatible with standard hydraulic chamber seats.

5. Common Failures & Replacement Guide

• Failure modes: Cracking, hardening, oil leakage, bulging and detachment.
• Replacement cycle: 500 to 1000 working hours (varies according to dust concentration and oil temperature).
• Replacement options: Use genuine part 09260298; domestic alternatives can be selected according to overall dimension and rubber hardness.