CONTROL GP-GRD 1097777 - Caterpillar

Illustration 1. Correct tube length is determined by measuring lengths (A) and (B).1. Cut the tube at right angles to provide a square edge on the end of the tube. Do NOT use a pipe cutter. Carefully deburr both the inside and outside edges. Do NOT produce a chamfer or a poor connection may result.2. Clean the area to remove all filings and residue.3. To ease assembly, lightly lubricate only the metal-to-metal surfaces with the lubricant that is being sealed. This includes the threads in coupling body (1), cutting ring (3), the threads in nut (5), and internal taper (9). See Illustration 2.4. Slip nut (5) and cutting ring (3) on the end of tube (6). The rear tapered section of cutting ring (4) will form to the rear tapered section in the wall of nut (7). The cutting ring must be positioned with the beveled edge toward the freshly cut end of the tube.5. Secure the end of tube (6) firmly against tube abutment (2) in coupling body (1). Tighten the nut by hand.
Illustration 2. Correct assembly of a typical cutting ring coupling. See text for part description.Illustration 3 shows the connector before the nut is tightened. Front cutting edge (8) is designed to penetrate the outer surface of the tube before second cutting edge (10) starts. As soon as both cutting edges have cut the tube to the designated depth, further advance is limited by stop edge (11). Notice that the end of the tube is flush with tube abutment (2) in the coupling body.
The ring is designed to cut into the tube to a controlled depth when installed correctly. This will cause the ring to act as a spring washer and ensure a tight joint. The cutting ring will be permanently embedded into the tube once it is tightened. This allows the joint to be disconnected and connected numerous times.
6. Place a mark on the outside of the nut and tube. Tighten the nut one and one-half turns. This will allow the front cutting edge to penetrate the outer surface of the tube. The tube must NOT turn with the nut.7. Tighten the nut an additional 3/4 turn. Stop edge (11) limits the tightening by increasing the tightening forces equally around the cutting ring.
Illustration 3. View of the nut before tightening.8. Loosen the nut. Visually check for freshly removed metal at location (12). The material should fill the space in front of the cutting ring and surface. If it does not, tighten the nut an additional 1/2 turn. The cutting ring should be capable of rotation, but must remain in place along the length of the tube. See Illustration 4.
Illustration 4. View of the nut after tightening. Area (12) must completely fill the space in front of the first cutting edge.Connector Assembly For Standpipe Usage
When assembling standpipes, the number of turns required to tighten the assembly is critical. Generally, use the previous procedure, except for the final assembly step. Tighten the nut at least one-half