A/C Cylinder Head (SS 191 Model) (012-101)
B3.9 and B5.9 Series Engines
Section 12 - Compressed Air System - Group 12
Install the following parts:
a. Spring (5)
b. Unloader pin (4)
c. New washer (2)
d. Unloader cover (1).
Tighten the cover.
The air discharge line must be capable of withstanding
extreme heat and pressure to avoid the possibility of
personal injury and property damage. Refer to the manu-
Continue to check for carbon buildup in the air discharge
line connections up to the first or wet tank.
Clean or replace any lines and fittings with carbon deposits
greater than 1.6 mm [0.06 (1/6) in]. Refer to the manufac-
turer's specifications for cleaning or replacement
Install and tighten the air inlet and outlet connections.
*1/2 NPT fitting in head
NOTE: Torque of the discharge line is dependent upon line
size and type. Consult vehicle manufacturer for correct
Close the wet tank draincock.
Operate the engine, and check for air leaks.