HOSE AS 4Z8955 - Caterpillar

Hi Duty Tube Fittings (Shear Sleeve)
Illustration 1 g00909648Put nut (1) over the tube and push the tube into the counterbore of the fitting body as far as possible. Turn the nut with a wrench until a small decrease in torque is felt. The small decrease in torque indicates that the sleeve (1A) has been broken off the nut. Hold the tube in order to prevent the tube from turning. Tighten the nut for an additional 1 1/2 turns.SAE Flareless Fittings
Illustration 2 g00909647Installing a New Flareless Fitting
Put nut (1) and sleeve (2) over the tube. The head end of the sleeve should be next to the nut. The head end has a shoulder. The nut will be seated against this shoulder when the nut is tightened. Push the tube into the counterbore of the fitting body as far as possible. Turn nut (1) clockwise until the sleeve grips the tube. The sleeve must prevent all movement of the tube. Tighten the nut for an additional 1 1/4 turns. The sleeve should be seated and the sleeve should give a locking action. Installing a Used Flareless Fitting
Less turns are required for a used fitting. Put nut (1) and sleeve (2) over the tube. The head of the sleeve should be next to the nut. Push the tube into the counterbore of the fitting body as far as possible. Tighten the nut until a sudden increase in torque is felt. Next, tighten the fitting for an additional 1/6 to 1/3 turn in order to seat the sleeve.Flex Fittings
Illustration 3 g00909645Put nut (1) and sleeve (2) over the tube and push the tube into the counterbore of the fitting body as far as possible. Tighten the nut until the nut is against the hex part of the fitting body.