Table 3-6. Unit Troubleshooting Table. -- Continued
Test or Inspection
NO AIR/LOW AIR IN SYSTEM.
Ensure air pressure is drained to 0 psi (0 kPa) before taking off any air components. If pressure is not
released, components could blow off and harm personnel. The IHMEE air system is pressurized to
119 psi (820 kPa). Do not drain air from a tank with any part of body in air spray path. Skin
embolisms and/or debris in eyes can occur from released pressure. Failure to comply may result in
injury or death to personnel.
Check governor (1) for leaks and to ensure governor has correct cut-in and cut-out pressures of
120-125 psi (827-862 kPa).
If governor (1) has leaks, tighten connections.
If governor (1) cut-in and cut-out pressures are incorrect, adjust to correct specification of
If governor (1) is defective or will not adjust, replace governor (Para 15-9).
Check air compressor (2) to ensure it functions properly.
Listen for dump valve for air displacement.
If air compressor (2) continuously displaces air from drier, replace air drier (Para 15-11).
Connect slave air line to service coupling on left front of vehicle and check air system for leaks in air
compressor supply lines (3) and fittings (4) (refer to FO-5).
If a leak is present, tighten loose connection, or replace defective lines (3) or fittings (4) (Para 15-8).
Check primary brake system for air leaks.
Repair air leaks by tightening connections or replacing bad components as necessary (Para 15-8).