This Check valve mounts in the block assy. on the following Robinair A/C machines. The most common problem you will have with this check valve is refrigerant loss from tank during a vacuum cycle. Sometimes pressure will build on low side gauge during a vacuum cycle. Inspect rubber surface for any distortion.
For Models:
17700Z
17700A (Built after March 1998)
17700K
342000
34234
345002K
34700 (Built after March 1998)
347002K
34700Z
34702Z
34800
348002K
34900
AC500Pro
AC890 (Mac Tools Built after March 1998)
AC900 (Mac Tools Built after March 1998)
AC9201
AC9370
AC9380
AC990
AC990A
ACR2000
H2345002K
H2347002K
H2348002K
RA-C345002K
RA-C347002K
RA-C348002K
All parts warranteed for 90 days from purchase date