Product Description
This direct replacement bypass hose (91H20-02770) is engineered for Mitsubishi and Caterpillar forklifts equipped with the K21 industrial engine. Constructed from reinforced synthetic rubber and designed for engine coolant system applications, this hose maintains optimal thermal and flow performance in demanding warehouse and industrial environments. Features factory-spec compatibility across a wide range of truck models and conforms to SAE J20R3 class D-1 standards for engine coolant hose reliability.
Specifications
Dimensional Specifications
| Application Fitting | Engine-specific bypass hose; dimensional data to match K21 engine coolant routing |
Material & Construction
| Hose Material | Reinforced synthetic rubber, suitable for coolant application |
| Standards Compliance | SAE J20R3 class D-1 for engine coolant hose |
Part Numbers
| Manufacturer Part Number | 91H20-02770 |
| Supersedes/Equivalent Part Numbers | 91H2002770, MB91H2002770 |
| Cross-Reference Part Numbers | 91H20-02770, 91H2002770, MB91H2002770 |
| Compatible Equipment Makes | Mitsubishi, Caterpillar |
| Compatible Truck Models | 2C3000AT81F, 2C3500AT81F, C3000AT81F, C3500AT81F, C4000AT81F, FGC15NAF81F, FGC18NAF81F, FGC20CNAF81F, 2C4000AT81F, FGC20NHOAF90, FGC25NHOAF90, 2C5000AT90, FGC20NAF90, FGC25NAF90, 2C4000AT82F, 2C5000AT82F, 2C4000AT90, C4000AT90, C5000AT90, 2PC4000AT34, C4000AT82F, C5000AT82F, FGC20NAF82F, FGC25NAF82F, FG15NAF34, FG18NAF34, FG20CNAF34, P3000AT34, P3500AT34, GP15NAT34, GP18NAT34, GP20CNAT34, 2P3500AT3430627, 2P3000AT34, FG33NAF13F, FG35NAF13F, P6500AT13F, P7000AT13F, GP33NAT13F, GP35NAT13F, 2P6500AT13F, 2P7000AT13F, FGC33NAF83F, FGC30NAF83F, 2C5500AT83F, 2C6000AT83F, 26500AT83F, 2C6500AT83F, C5500AT83F, C6000AT83F, C6500AT83F, FGC28NAF83F, FG30NAF13F, P5500AT36, P6000AT13F, GP28NAT13F, GP30NAT13F |
Frequently Asked Questions
Q: What forklifts use bypass hose 91H20-02770?
A: This bypass hose is designed for Mitsubishi and Caterpillar forklifts equipped with the K21 industrial engine. Compatible models include 2C3000AT81F, 2C3500AT81F, C3000AT81F, C3500AT81F, C4000AT81F, and FGC15NAF81F. Verify your truck model against this list before ordering.
Q: What is the function of bypass hose 91H20-02770?
A: This is an OEM-equivalent coolant system bypass hose. It routes coolant through the bypass circuit when the engine is cold or during thermostat opening cycles. Bypass hoses prevent cavitation and maintain proper coolant flow in K21 engine cooling systems.
Q: What material and standards does this bypass hose meet?
A: Hose 91H20-02770 is constructed from reinforced synthetic rubber engineered for coolant applications. It conforms to industry standard SAE J20R3 class D-1 for engine coolant hose. This material resists degradation from hot coolant and freeze-thaw cycles.
Q: What are the cross-reference part numbers for 91H20-02770?
A: Cross-reference numbers are 91H2002770 and MB91H2002770. These are OEM-equivalent designations for the same bypass hose. Use any of these part numbers interchangeably when ordering replacement coolant system hoses for K21-equipped Mitsubishi or Caterpillar trucks.