MWO 5-2330-360-23-1
10. MODIFICATION PROCEDURE FOR M870 BRAKE (BENDIX) (Continued).
p.
Install New Spring Brake Emergency and Service Air Tubing.
Refer to Figure 14 and perform the following:
(1) To determine length of tubing needed, run a new emergency air line(3/8"tube) (2), PN 246623, (Figure 14a)
from spring brake valve, front tee, left connection (1). rearward along left main frame rail. Go over crossmember at
same location as the wiring harness. Go to rear air reservoir tank relay emergency valve lower 45 degree elbow (3).
(2) Remove tubing nut and sleeve from spring brake valve, front tee, left connection (1). Install tubing nut, sleeve,
and tubing insert (Figure 14b), PN 246089. on spring brake valve end of new 3/8-inch emergency air line tubing (2).
Connect new emergency air line to spring brake valve, front tee, left connection (1).
(3) Recheck routing and length of new emergency air line (2) to rear air reservoir tank relay emergency valve.
Mark the length and cut the new emergency air line at the relay emergency valve location.
(4) Remove tubing nut and sleeve from relay emergency valve lower 45 degree elbow (3). install tubing nut,
sleeve, and tubing insert PN 246089, on relay emergency valve end of new 3/8-inch emergency air line tubing.
Connect new emergency air line (2) to relay emergency valve lower 45 degree elbow (2).
(5)
Figure 14.
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