DUPLEX AIR GAGES (cont)
If duplex air gage (11) is removed from the locomotive, test by the following:
Use a deadweight tester and test duplex air gage (11) at half scale and full scale. Compare amount of
weight applied to the reading shown on gage.
Adjust pointer as follows:
Use a pointer puller and remove pointer.
Apply 30 psi (207
kPa) test pressure to gage and install pointer. Set pointer on the 30-psi (207 kPa)
mark on the dial.
Check the accuracy over the entire scale. The gage shall be accurate within
If duplex air gage (11) is not accurate within
ñ 1.5%, further repair is required. Send duplex air gage to a