TTK 2A Hoses and Fittings

1. HOSES, LINES, SEALSHOSES, LINES, SEALS
AND FITTINGSAND FITTINGS
HOSES, LINES, SEALSHOSES, LINES, SEALS
AND FITTINGSAND FITTINGS

2. ??

3. What component is not found in a system using aWhat component is not found in a system using a
variable displacement compressor?variable displacement compressor?
• a. orifice tube
• b. the condenser
• c. pressure cycling switch
• d. the desiccant

5. WHAT ARE THEWHAT ARE THE
DIFFERENT HOSE TYPES?DIFFERENT HOSE TYPES?
STANDARD OLD STYLE NEOPRENE
NEWER BARRIER HOSE WITH NYLON CORE
**ALSO METAL LINES**

6. OLD STYLE HOSEOLD STYLE HOSEOLD STYLE HOSEOLD STYLE HOSE

7. BARRIER HOSEBARRIER HOSEBARRIER HOSEBARRIER HOSE

8. HOW AREHOW ARE
HOSESHOSES
MEASURED?MEASURED?
HOW AREHOW ARE
HOSESHOSES
MEASURED?MEASURED?
• HOSES CAN BE GIVEN A NUMBER
DESIGNATION, SUCH AS #6, #8, #10
AND #12

9. HOW ARE HOSESHOW ARE HOSES
MEASURED?MEASURED?
• There is a difference from barbed to
beaded

10. ??HOW ARE HOSESCONNECTEDHOW ARE HOSESCONNECTED
TO METAL TUBING?TO METAL TUBING?
OLD SCHOOLOLD SCHOOL
AND ILLEGAL!AND ILLEGAL!

11. • BY HAND OR,
HOW ARE HOSES CONNECTED TO METALHOW ARE HOSES CONNECTED TO METAL
TUBING?TUBING?
HOW ARE HOSES CONNECTED TO METALHOW ARE HOSES CONNECTED TO METAL
TUBING?TUBING?
OLD STYLE BARBED

12. HOW ARE HOSESHOW ARE HOSES
CONNECTED TO METALCONNECTED TO METAL
TUBING?TUBING?
• BY
HYDRAULICS!

13. HOW ARE HOSES CONNECTEDHOW ARE HOSES CONNECTED
TO METAL TUBING?TO METAL TUBING?
HOW ARE HOSES CONNECTEDHOW ARE HOSES CONNECTED
TO METAL TUBING?TO METAL TUBING?
3/8
NEW STYLE GROOVE

14. WHAT WAYS ARE METALWHAT WAYS ARE METAL
FITTINGS CONNECTED?FITTINGS CONNECTED?
WHAT WAYS ARE METALWHAT WAYS ARE METAL
FITTINGS CONNECTED?FITTINGS CONNECTED?
• FLANGE FITTINGS

15. WHAT WAYS ARE METALWHAT WAYS ARE METAL
FITTINGS CONNECTED?FITTINGS CONNECTED?
WHAT WAYS ARE METALWHAT WAYS ARE METAL
FITTINGS CONNECTED?FITTINGS CONNECTED?
• O-RING
CONFIGURATION

16. • QUICK DISCONNECT
WHAT WAYS ARE METALWHAT WAYS ARE METAL
FITTINGS CONNECTED?FITTINGS CONNECTED?
WHAT WAYS ARE METALWHAT WAYS ARE METAL
FITTINGS CONNECTED?FITTINGS CONNECTED?

17. ??

18. Newer style barrier hose isNewer style barrier hose is
recommended because:recommended because:
• a. R-134a operates at higher pressures.
• b. refrigerant must not be allowed to escape to
the atmosphere.
• c. R-134a has smaller molecules than R-12.
• d. both a & c are correct
• e. All of the above are correct