GSi GRA, Installation And Operation Manual

Page: 29 / 40

7. Maintenance and Repair
PNEG-2174 Sampler - Model GRA 29
Sample Cutter Seals Replacement
When following the instructions below, refer to the applicable drawing of the sampler. Reference the
section drawings of the samplers
on Pages 35 and 36 and the certified drawing(s).
1. Shut off and lock out all power (electrical and pneumatic).
2. Shut down conveying line and remove the large inspection cover on the sampler housing.
3. Move the sample pelican to the middle of its travel.
4. Remove the 5/16''-18 UNC hex head nuts fastening the sample cutter seal brackets the sampler
housing (avoid dropping the assemblies inside the sampler).
5. Wrap the new seals around the seal brackets and re-install.
6. Move the sample pelican to its home position on each side and check to see that the cutter fits snugly
under the pelican seals.
7. Re-install the inspection cover on the housing.
8. Restore power to the sampler and operate it through several collection cycles.
Drive Arm Positioning and Torque Hub Tightening
When following the instructions below, refer to Figure 7A and the section drawings of the samplers
on Pages 35 and 36 the certified drawing(s).
Figure 7A Model GRA Drive Arm and Torque Hub
Ref # Description Ref # Description
1 Air Cylinder 4 Torque Hub
2 Jam Nut 5 Drive Arm
3 Rod Clevis