MWO 5-2330-360-23-1
10. MODIFICATION PROCEDURE FOR M870 BRAKE (BENDIX) (Continued).
q.
Install New Spring Brake Emergency and Service Air Tubing (Continued).
Refer to Figure 15 and perform the following:
(1) To determine the length of tubing needed, run a new 3/8-inch service air line tubing (1) from spring brake valve
right tee right connection (2) rearward along the right main frame rail (Figure 15a). Go over the crossmember in the
same manner as the new emergency air line. proceed to the rear air reservoir tank relay emergency valve upper 45
degree elbow (3).
(2) Remove combined tubing nut, and sleeve from spring brake valve right tee right connection (2). Install
combined tubing nut, sleeve, and tubing insert, PN 246089 (Figure 15b). on the spring brake valve end of the new 3/8-
inch service air line tube (1).
(3) Connect new 3/8-inch service air line (1) to the spring brake valve right tee right connection (2).
(4) Recheck routing and length of the new 3/8-inch service air line (1) to rear air reservoir tank relay emergency
valve. Mark the length and cut the new service air line (1) at the relay emergency valve location.
(5) Remove tubing nut and sleeve from the relay emergency valve upper 45-degree elbow (3). Install tubing nut,
sleeve, and tubing insert. PN 246089, on the relay emergency valve end of the new 3/8-inch service air line tubing (1).
Connect new service air line to the relay emergency valve upper 45 degree elbow (3).
Figure 15.
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