Four Seasons 55978 a/c refrigerant suction hose for the 2000-2020 Freightliner Columbia and other vehicles carries refrigerant on the low-pressure side of the A/C system back to the compressor. It is also called a suction line hose assembly.
- Engineered and tested for years of trouble free operation, with over 50 years of mobile a/c experience behind it
- Double wall barrier hose compatible with R1234YF, R134A or R12
- Crimp fitting connection
- Application specific design
A refrigerant leak, oily residue at a fitting or an A/C that blows warm can mean a hose is failing, but other A/C faults show up the same way. Before replacing it, look over the hose and its fittings with the engine off for cracks, chafing and oily spots, and leave pressure testing to a shop.
This hose is a direct-fit replacement for the 1996-2011 Freightliner Century Class as well.
Specifications
Fit and size
- Design: application specific
- Connection: crimp fitting
Build and materials
- Construction: double wall barrier hose
- Compatible refrigerants: R1234YF, R134A, R12
In the box
Gaskets, o-rings or seals to properly replace the hose.
Interchange: 921557 · T55978 · 7750601 · 785488 · 501340450 · A2252177331 · 090601 · A70594 · 3464283 · HA114074 · HA114074C
This part cross-references / interchanges with the following part numbers:
921557, T55978, 7750601, 785488, 55978, 501340450, A2252177331, 090601, A70594, 3464283, HA114074, HA114074C
Frequently Asked Questions
Does Four Seasons 55978 fit the 2000-2020 Freightliner Columbia?
Yes. Four Seasons 55978 is an application specific suction hose for the 2000-2020 Freightliner Columbia, and it also fits the 1996-2011 Freightliner Century Class.
Can I use this suction hose with R1234YF or R134A refrigerant?
Yes. This hose is a double wall barrier hose compatible with R1234YF, R134A or R12 refrigerant.
Do I get o-rings or gaskets with this A/C suction hose?
Yes. The package contains gaskets, o-rings or seals to properly replace the hose.
What kind of fitting connection does the Four Seasons 55978 suction hose have?
Four Seasons 55978 has a crimp fitting connection. It is a suction line hose assembly with an application specific design.
Is 921557 an interchange number for Four Seasons 55978?
Yes. Four Seasons 55978 replaces 921557, which is one of the interchange numbers listed on this page.
