Liquid Controls Flow Meter M-15

Acknowledge understanding of the warning

Relieving Internal Pressure Procedure for LPG and NH₃ Meters

Close the belly valve of the supply tank.

Close the valve on the vapor return line.

Close the manual valve in the supply line on the inlet side of the meter.

Is there a manual valve on the inlet side of the meter?

Consult the truck manufacturer for procedures to depressurize the system if no manual valve exists on the inlet side.

Slowly open the valve/nozzle at the end of the supply line.

Identify the condition of the O-rings

Action Based on O-Rings Condition

Do the O-rings need replacement?

Is there a sign of shock problems?

Contact full-service distributor for assistance if shock problems are indicated

Examine all fasteners for issues

Use a straight edge to determine flatness

Ensure all internal pressure is relieved to zero before starting the procedure.

Remove the two screws on the packing gland retaining plate using a 5/16" socket and ratchet drive extension or 5/16" nut driver.

Pry off the retaining ring with a standard screwdriver.

Pull the driver out from the assembly.

Select the mounting holes for the retaining plate based on the presence of a counter adapter dust cover.

Check the bearing plates for the following issues

Use a straight edge to check for flatness

Are there any shock problems causing warping?

Have shock problems been resolved?

Contact your full-service distributor for assistance if shock problems exist