Industrial Products

Industrial Products | Hydraulic HosePrecautions

For Safety's sake

Be sure to read the following before use.

  1. Bridgestone Hydraulic hose, couplings, and accessories are developed for hydraulic components.
    Follow each product's application and specification. Avoid hose burst, leakage, and other dangers by following important steps.

1 Proper usage

Warning

Do not touch a pressurized hydraulic hose assembly with any part of your body.
If hoses, couplings or accessories are broken, and a fluid touches the skin, even if no pain is felt, a serious injury including burns may be caused. In case of JAT/JAM series, be sure to use safety chains.
Use of plastic hose guards will help a person avoid injury.
System working pressure should not exceed the rated working pressure of the hose assembly.
Exceeding the rated working pressure of the hose may result in the hose bursting or hose coupling blow-off.
Follow the maximum working pressure ratings listed in this catalog.
Protect hose from abrasions.
If the hose reinforcement is exposed, it is susceptible to rust and accelerated damage leading to serious failure like hose burst. If it is found, replace with a new one.
Avoid applications where the hose is or will be twisted or pulled.
Twisting or stretching a hydraulic hose under pressure may result in hose bursting or hose coupling blow-off.
If it is found, replace with a new one, then install a live swivel joint.
Do not snap the hose.
Snapping and deforming will lead to hose burst, leakage, and hose coupling blow-off. If found, replace with a new one.
Do not apply an electrical current to a hose assembly.
Electrifying a hose may lead to a hose failure or an electric shock.
Tighten hose assemblies to the recommended torque.
If tightening is improper, there are possibilities of leakage, connection portion breakage, and separation. Be sure to apply the recommended torque by using a torque spanner. In case of over torque, replace with a new one. In case of under torque, retighten with the recommended torque.
Use compatible hydraulic fluid
The use of an incompatible hydraulic fluid will deteriorate the inner tube and the reinforcement resulting in the hose bursting or coupling hose coupling blow-off.

Caution

Avoid the usage exceeding the minimum bending radius
The usage exceeding the minimum bending radius may cause hose burst and leakage. Be sure to follow the specified minimum bending radius.
Avoid excessive vibration
Excessive vibration may cause leakage and hose coupling blow-off by fatigue.
Avoid the usage exceeding applicable temperature
The usage exceeding applicable temperature may cause leakage and hose coupling blow-off.
Avoid vacuum pressure (except for suction hose)
Excessive vacuum pressure may result in the inner tube damage which leads to hose failure.
Avoid submerging hose assemblies in water or any other liquid.
Hose assemblies submerged in water are exposed to external pressure which will reduce the service life of a hose and/or have bad effect or hose assembly performance.
Remove all air from hydraulic hose assemblies.
Air may cause damage to the inner tube which will lead to hose failure.
Follow minimum hose exposed length
Follow minimum hose exposed length. Improper length may reult in inferior performance to catalog specification.
Never repair or rework a hose assembly.
Old or used hose assemblies do not have the same physical characteristics as a new hose and cannot be used.
Old hoses or damaged hoses should be replared with new one, and should not be repaired or reworked.

2 Warranty period

Warranty period is impulse cycle number or each specified period, whichever comes earlier .

3 Preventive maintenance

Before use, check the following points. If any, replace with a new one.
Physical damage, blister, exposed reinforcement, kinking, hose coupling blow-off,leakage etc.
JIS B8360,8362,8364 recommend that hoses should be changed every 2 years.

4 Storage

  • Cap the couplings or hose cut ends
  • Keep out of direct sunlight
  • Do not expose to corrosive gas, oil or chemicals
  • Store in dark and dry place at the temperature between -10℃ and +40℃ (14°F to 104°F)
  1. For safety's sake, list the above warnings in your catalogue in order to avoid miss-use of products by end users.
Danger
This symbol indicates failure to comply with the indications will cause personal death or injury
Warning
This symbol indicates failure to comply with the indications may cause personal death or injury.
Caution
This symbol indicates failure to comply with the indications may cause personal injury or physical damage.