In all cases, repair consists of replacing unserviceable components or tightening
loose fittings. Replace fittings if tightening or antiseize tape to pipe threads will not
All removal and installation instructions are keyed to the Views A through F which
comprise Figure 4-27. Each method shown is typical of a specific kind of connection.
a. Refer to Figure 4-27, View A, and replace a compression nut connection as follows:
Unscrew nut (1) and remove tube (2) from fitting. Compression fitting (3) will come off with tube (2).
If necessary, cut off damaged portion of tube (2) or replace the tube.
Slide nut (1) on tube (2) with threaded end of nut toward the fitting.
Slide conical compression nut (3) on tube (2) with small (cone) end of compression nut toward fitting.
Place antiseize tape on fitting.
Insert tube (2) in fitting until tube is firmly against the internal shoulder of fitting.
Tighten nut (1). This will push compression nut (3) to clamp tube (2) in fitting.
b. Refer to Figure 4-27, View B, and replace a band connection as follows:
Larger hoses are sometimes connected with two bands. This does not change the
(1) Carefully cut the hose (2) at a point beneath band(1) and just below the joint that fitting (3) reaches within the _
(2) Cut the band and the remaining hose off fitting (3).
(3) If sufficient hose remains, proceed with step 4. If not, replace the hose and proceed with step 4.
(4) Insert the dart end of fitting (3) in hose (2), making sure the fitting is fully inserted in the hose.
(5) Using a bander, place one or more bands over the hose, clamping the hose to the fitting. Position the bands
about 1/2 inch down from the fitting flange.
c. Refer to Figure 4-27, View C, and replace a single clamp connection as follows:
(1) Loosen hose clamp (1) and slide it downward on hose (2).
(2) Remove fitting (3) from hose (2). It maybe necessary to cut hose (2) off, or to split the hose in order to get the
hose off fitting (3).
(3) If hose is damaged, cut off damaged portion. If hose is now too short, replace hose.
(4) Slide band (1) over hose (2).
(5) Insert fitting (3) fully into hose (2), push clamp (1) over the hose and onto fitting (3) and tighten clamp (1 ), using a
screwdriver. Position clamp about 1/2 inch down from fitting flange.
d. Refer to Figure 4-27, View D. The procedure for replacing a double clamp connection is identical to the procedure
for replacing a single clamp connection except that two clamps are installed. See the procedure for View C.