JIS D2605 Automotive Parts - Rubber Cups for Hydraulic Brake Cylinders Using Non-Petroleum Based Hydraulic Brake Fluid

The standard “JIS D2605 Automotive parts - Rubber cups for hydraulic brake cylinders using non-petroleum-based hydraulic brake fluid” developed by the Japanese Industrial Standards organization (JIS) describes the requirements for molded rubber cups and seals for master and wheel cylinders for automotive hydraulic brake systems using a non-petroleum-based brake fluid.

Other standards corresponding to this standard are the following two standards developed by the International Standards Organization (ISO):

• ISO 4928 Road vehicles - Elastomeric containers and cylinder seals for hydraulic brake systems using non-petroleum-based hydraulic brake fluid (service temperature maximum 120 degrees)
• ISO 6118 Road vehicles - Elastomeric containers and cylinder seals for hydraulic brake systems using non-petroleum-based hydraulic brake fluid (service temperature maximum 70 degrees)

Rubber containers shall be classified as follows:

• Class 1 Suitable for operation at normal temperature
• Class 2 Suitable for high temperature operation
• Class 3 Suitable for operation at extra high temperatures (the application corresponding to this class is not specified in international standards)

For quality purposes, the cup surface should be well polished and free from harmful bubbles, defects, burrs, foreign matter, etc. The performance of cups when tested in accordance with this standard shall meet the requirements given in the table.

The performance of the containers is given in the table based on the following criteria:

• Original status
  • Hardness (informative)
• Aging feature
  • Temperature
  • Süre
  • Hardness change (not required)
  • Condition (containers should be free from excessive stickiness and obvious abnormalities)
• Fluid resistance
  • Temperature
  • Süre
  • Test liquid
  • volume change
  • Lip diameter change
  • Base diameter
  • Hardness change (not required)
  • Condition (containers shall be free from excessive stickiness and obvious abnormalities)
• Precipitation
  • Temperature
  • Süre
  • Test liquid
  • Rainfall
• Metal corrosion
  • Temperature
  • Süre
  • Test liquid 0) Liquid conforming to JIS K.2233
  • Mass change - Tin iron
  • Mass change - Steel
  • Mass change - Aluminum
  • Mass change - Cast iron
  • Mass change - Brass
  • Mass change - Copper
  • Appearance: There should be no pitting or rough surfaces visible to the naked eye, but staining or discoloration is allowed
  • Rainfall
  • Base diameter change (not mandatory)
  • Hardness change (not required)
  • Appearance: There should be no significant change in the shape or surface condition of the rubber.
• Low temperature resistance
  • Temperature
  • Süre
  • Low temperature bending (containers should not crack and should return to approximately original shape within 1 minute)
• Low temperature leak test
  • Temperature
  • Süre
  • Test liquid
  • Condition (there should be no leaks)
• Impact durability
  • Master cylinder container - Test fluid
  • Main cylinder cap - Temperature
  • Master cylinder housing - Duration
  • Master cylinder reservoir - Fluid pressure
  • Master Cylinder Cup - Condition (must not cause pressure drop due to fluid leakage from primary or pressure cup, must not have two or more fluid leakage drops passing through the secondary cup of a single master cylinder or the primary piston side of a tandem master cylinder, and cups must be free from harmful deformation, wear and other defects)
  • Master cylinder cap - Hardness change (not mandatory)
  • Wheel cylinder housing - Temperature
  • Wheel cylinder housing - Duration
  • Wheel cylinder housing - Fluid pressure
  • Wheel cylinder cup - Condition (no end should have two or more drops of fluid leaking, cups should be free from harmful deformation, wear and other defects, and there should be no corrosion noticeable to the naked eye on the parts of the cylinder inner wall or sections that contact or abut the cup)
  • Wheel cylinder cap - Hardness change (not mandatory)
• Storage corrosion
  • Exposure condition
  • Test liquid
  • Condition - Master cylinder and wheel cylinder (there should be no corrosion visible to the naked eye on the parts of the piston or the inner wall of the cylinder that are in contact with the cup or adjacent to the cup, and corrosion and other abnormalities other than those in contact with or adjacent to the cup should not be a reason for rejection)

Among the numerous tests, measurements, analyses and evaluations our organization has carried out for businesses in various sectors, our organization also provides testing services defined in the standard “JIS D2605 Automotive parts - Rubber cups for hydraulic brake cylinders using non-petroleum-based hydraulic brake fluid” with its trained and expert staff and advanced technological equipment.