Product Description
Hose, bypass
Specifications
Product Overview
| Part Number | 380009-109 |
| Product Type | Bypass Hose Assembly |
Physical Specifications
| Tube Material | Reinforced synthetic rubber or thermoplastic |
| Fluid Type | Hydraulic mineral oil, coolant |
| System Function | Diverts excess fluid during overpressure or bypass modes |
| Temperature Range | -10°C to +100°C typical |
| Pressure Rating | System-dependent, typically 200-350 bar |
| Condition | Direct replacement, factory-spec compatible |
Compatibility
| Application | Hydraulic and cooling circuits, electric forklifts and pallet jacks |
| Compatible Equipment Brands | Crown, Toyota, Yale, Hyster, Raymond, Nichiyu, Jungheinrich |
Frequently Asked Questions
Q: What forklift systems use the 380009-109 bypass hose?
A: The 380009-109 bypass hose is used in hydraulic and cooling circuits on Crown, Toyota, Raymond, Yale, and Hyster equipment. This hose diverts fluid flow when system pressure exceeds relief valve settings or during coolant bypass modes. Verify your equipment model and circuit type before ordering.
Q: What material is this bypass hose made from?
A: Bypass hoses are typically constructed with reinforced synthetic rubber or thermoplastic inner tubing rated for the system pressure and fluid type. The tube must resist mineral oil (hydraulic) or coolant fluid depending on circuit application. Material compatibility prevents swelling, cracking, and fluid leakage.
Q: What causes bypass hose failure?
A: Common failure modes include abrasion against sharp frame edges, age-related hardening and cracking, heat exposure, fluid incompatibility, and pressure spikes. Inspect hoses for surface cracking, bulging, or soft spots. Leaking fluid at connection points indicates seal failure or tubing degradation.
Q: How often should bypass hoses be replaced?
A: Bypass hose replacement intervals depend on fluid type, operating temperature, and pressure cycles. Most hoses last 3 to 7 years in standard duty. Cold storage and high-temperature environments reduce lifespan. Replace hoses preventively every 5 years if visual inspection shows hardening, surface cracking, or color change.
