Gasboy Atlas Start-up - Manual (Page 147)

MDE-4334D Atlas™ Start-up and Service Manual · July 2013 Page 6-27
Meters Hydraulic/Mechanical Components
CFT/E85 Meters
The CFT/E85 Meter is a four-piston, mechanically-calibrated positive displacement piston
meter, where the fluid is pushed into a cylinder which causes the opposing piston to push a
similar cylinder of fluid out. Two sets of two pistons are used and timed using cam and piston
connecting bars to convert the piston movement into a rotation of the meter output shaft. The
meter has a flow path that discharges the product from the center chamber on the bottom of the
meter. This configuration reduces water and contaminates from building up in the meter and
prevents meter freeze-ups from water accumulation in the meter during very cold weather,
resulting in longer meter life.
Figure 6-13: CFT Meter Date and Model Code Location
Assembled View of CFT Meter
Service Tips
• Purge air from the system before performing a calibration. Air in the system affects the
accuracy of the calibration. Refer to “Purging Air from System” on page 6-9 .
• Place an approved pan under the meter during repairs to collect the residual fuel.
• Replacing the top quad ring requires the use of a special tool that is included in the
replacement seal kit. The tool protects the new seal during installation over the drive pin
across the hole in the shaft.
• It is not cost effective to rebuild a meter. If a meter exhibits problems, install a new meter.
Note: Meter tops must be returned for warranty coverage.
• Remove and replace the meter using metric tools.
• Inspect all gaskets when the unit is Off during repairs. Replace the meters, as required.
• Some meter bolts are difficult to access. A 13-mm universal socket makes installation and
removal easier.
• For calibration procedures, refer to “Meter Calibration” on page 6-22 .
• After calibrating a meter, always ensure that it is properly sealed at the calibrating wheel
to avoid tampering.