Pressure Systems, Inc. | 98RK-1 & 9816 User’s Manual© |
| |
5.1.6.7Solenoid Valve O-Ring Replacement
The rear panel quick disconnect (QDC) block (if your 98RK-1 Scanner Interface Rack is equipped for rear-mounted tubing) may be removed as a complete unit (eight QDC blocks attached to a non-removable eight-piece manifold) and may be re-installed as a complete unit or each of the eight blocks may be re-installed individually. Each rear QDC consists of an “H” block, tubed to an adapter plate, and a tubing plate. There are O-rings on the “H” block and the tubing plate. If a leak is suspected in the rear panel quick disconnect (QDC) block.
(1)Remove eight (8) 10-24 x ½" stainless steel (ss) Phillips-head screws. One screw is used to hold each of the eight (8) modules to its individual adapter plate.
(2)Remove four (4) 6-32 x ¼" stainless steel (ss) Phillips-head screws from the sides of the rear panel QDC mounting plate, and three (3) 4-40 x d" anodized Allen-head screws from the bottom of the rear panel QDC mounting plate.
(3)Remove the entire QDC assembly.
(4)Inspect the rear QDC (“H” block and tubing plate) O-rings and if any are suspect, carefully remove with tweezers. (Do not scratch either the “H” block or the tubing plate, as this may induce additional leaks.)
(5)Clean the O-ring cup with a lint-free applicator moistened with a cleaning fluid such as acetone, alcohol, Freon, or any other substance that evaporates quickly and leaves very little residue. Remove any excess cleaner with supply air (dry) as soon as possible. Do not blow air directly into the holes of the surface since that could drive the fluid into the scanner.
(6)Apply a very small amount of Krytox® fluorinated grease to the entire manifold (“H” block and tubing plate), being careful not to allow any excess grease to cover any tubing port.
(7)Re-install the QDC assembly. It is extremely critical that each “H” block tubing assembly be mated exactly to its adapter plate on the eight-piece manifold. For this procedure, it may be prudent to disassemble each QDC from its mounting rack and individually re- install it. To remove each QDC from its mounting rack, remove the four (4) 4-40 d" Allen- head screws (one in each corner of the QDC).
(8)Mount the “H” block tubing assembly to its adapter plate on the eight-piece manifold and secure with its 10-24 x ½" stainless steel Phillips-head screw. Assemble each of the tubing blocks in this manner, and then re-connect them to the mounting plate with the Allen-head screws.
(9)Re-connect the QDC mounting rack to the 98RK-1 chassis with the four (4) 6-32 x ¼" stainless steel Phillips-head screws (at the ends) and the three (3) 4-40 x d" anodized Allen-head screws.
(10)Test your scanner to ensure proper operation.
