Page 16 • MN01005 ║ Issue/Rev. 0.6 (12/18)
2-Bladed Double Case PD Meters Service Manual
Disassembly
be removed from collar.
The cam may be removed from the shaft by pressing it off. A woodruff key is used to prevent the
cam from turning on the shaft.
The adjusting screw extension pin is removed from the shaft by taking out the adjusting screw,
nut, and washer, Figure 25.
If blade bearings need replacement, removal is accomplished as follows, Figure 26:
1. Remove cotter pin and press out blade roller pin with a drill rod.
2. Reassemble with new bearing in press. Use care to align slot pin with cotter pin hole.
3. Bend ends of cotter pin as shown.
If replacement of tungsten carbide outer radial bearings is necessary, it is recommended that
complete next-level assemblies (rotor gear plate or rotor sub-assembly) be procured with bearings
already installed, or capabilities must permit epoxying bearings in precise alignment.
Note on H8 and JA10 Blade Roller Pins:
On later meters, a change has been made in blade roller pins.
The exposed end of the pin has been shortened, drilled, and tapped so that it can be extracted by
using a cap screw and a bushing arrangement to jack the pin from the blade rather that having to
drive it out with a drill rod as in the old style. In assembly, pins should be coated with “Anti-Sieze
Lube,” then pressed into position.
2.12.
C2 Series Meter
The main difference in this series is that the rotor spring is not a part of the cam and shaft assembly,
and is positioned in the bottom of the inner housing below the rotor assembly. Rotor adjustment
is still accomplished in the same manner, Figure 27. When checking blade to housing and rotor
to block clearances, the spring must be removed so that rotor assembly can be bottomed.
Figure 25
– Removing Collar
Figure 26
Figure 27 –
Rotor Removal, Series C2 Meter