- Be sure to thoroughly oil hose.
Put socket in vise as shown. Turning counter-clockwise, thread hose into socket. Leave a gap of 1/32" to 1/16" between end of hose and inside shoulder of socket.
- Only the inside tube needs lubrication. Make sure the outside is dry. Otherwise, you will loose grip when handling the hose and bust your knuckle.
- The competitor brand, Aeroquip, suggests SAE 30 oil in their hydraulic catalogs. Gates Rubber does not recommend a specific oil viscosity.
Oil insert thread on nipple thoroughly.
- This is one of the two critical points in this work. Make sure that when you push the hose in, keep it staight and align it properly to the socket.
- After this step, do not forget to mark a line on the hose, where the socket ends.
With clockwise motion, thread nipple into socket until nipple hex shoulders against ferrule.
- Check the threads for damages.
- Note: some fittings have bigger stem diameter, so they may be more difficult to insert. If this is the case, hose end could be damaged if you're not careful.
Inspect assembly internally for cut or bulge tube obstructions and cleanliness.
- Look through the hose, before you insert the fitting. This is the second important step. If the fitting end is tightened too much, then it may crack from its stem.
- Remember that line on the hose? If the line was pushed back, then the hose was loosened. Hose assembly may not hold under pressure.
- See that picture above? DO NOT DO IT! Keep the hose away at about 6 inch or more. The figure above shows the hose too close to the eye. An oil, rubber, or metal filing could drop on your eyeball. It's also a good practice to blow air through the assembly.
- When the fitting was put together the fitting may have cut the inside core of the hose. Checking the hose assembly is very important, because these hoses are used on critical applications--i.e., truck air brakes, fuel lines, and hydraulic systems. Note: Images & instructions, in verbatum, from Gates Hydraulic Catalog 2002 (page 65). Texts in red color are additions by our technician, and not endorsed by Gates or Aeroqup. These additions are personal comments, and not necessarily the views of Hose Line.