Servo Cylinder Diaphragm Replacement – 88-665957 / 90-560525

Servo Cylinder Diaphragm Replacement – 88-665957 / 90-560525 Description

The 88-665957 / 90-560525 Servo Cylinder Diaphragm is a replacement membrane for compatible Atlas Copco pneumatic servo cylinder assemblies. It provides a flexible sealing barrier inside the actuator, helping maintain pressure separation and support consistent cylinder movement.

Part number 88-665957 is associated with replacement reference 90-560525. Some parts references also associate this diaphragm with assembly number 1183318. Check the original part number and diaphragm specifications before ordering to ensure a correct match.

Function

The servo cylinder diaphragm supports pneumatic actuator operation by:

• Separating pressure chambers inside the servo cylinder.

• Maintaining an effective sealing barrier during operation.

• Allowing pressure changes to move the diaphragm.

• Supporting consistent pneumatic control and actuator response.

Replacement Solutions

01 — Air Leakage Inside the Servo Cylinder

A worn or cracked diaphragm can allow air to leak between pressure chambers, reducing actuator response and affecting compressor control. Replacing the damaged 88-665957 / 90-560525 diaphragm helps restore the sealing function without replacing the complete servo cylinder, provided the cylinder body remains in good condition.

02 — Unstable Servo Cylinder Movement

Material fatigue, deformation, or diaphragm damage can prevent the actuator from responding consistently to pressure changes. Installing a correctly matched replacement diaphragm helps restore stable movement and reliable pneumatic operation.

03 — Incorrect Diaphragm Size or Part Number

A replacement diaphragm with the wrong dimensions or sealing profile may cause installation difficulties or continued air leakage. Check both part numbers, the original diaphragm dimensions, and the assembly specifications before purchasing.

FAQs from Servo Cylinder Diaphragm Replacement – 88-665957 / 90-560525

01 — Are 88-665957 and 90-560525 the same diaphragm?

Parts references associate 88-665957 with replacement number 90-560525. Confirm the part number and physical specifications against your original component before ordering.

02 — What is the function of a servo cylinder diaphragm?

It separates pressure chambers and responds to pneumatic pressure changes, allowing the servo cylinder to control actuator movement.

03 — What are the signs of a damaged servo cylinder diaphragm?

Common signs include internal air leakage, unstable actuator movement, reduced pneumatic response, and difficulty maintaining operating pressure.

04 — Can I replace the diaphragm without replacing the complete servo cylinder?

Yes. You can replace the diaphragm separately if the cylinder body and other internal components remain serviceable. Inspect the assembly before installation.