VMAC - Vehicle Mounted Air Compressors
VMAC Technical Support: 888-241-2289
VMAC Knowledge Base: www.kb.vmacair.com
16
Relocating the ABS Hydraulic Control
Unit (HCU)
Depending on the application, the following steps may not be
necessary. If the HCU is mounted towards the firewall
(Figure 15 on page 18), proceed to the next chapter. If the HCU
bracket is mounted using the holes shown in Figure 12, follow the
steps in this chapter.
Failure to follow these instructions may result in brake system
contamination, component damage and/or death.
It may be necessary to rotate the brake lines that connect the
master cylinder to the ABS HCU module to avoid kinking the flexible
rubber hoses as the HCU is shifted to its new position. The following
process will help to avoid air from entering the brake system as
brake fluid is forced out of the system.
Do not pump the brakes at any time while the brake lines are loose
as air may be drawn into the system.
Have an assistant gently depress the service brake as the brake
line is loosened, rotated into a relaxed position and then quickly
re-tightened. Adjust one brake line at a time. If there is a significant
amount of brake fluid escaping from the fitting, the pedal is being
pressed too hard and/or the fitting has been loosened too much.
Do not allow the brake master cylinder to run dry during these
steps. The master cylinder may be damaged if operated without
fluid.
Use only clean brake fluid from an unopened container that meets
Ford specifications.
If there is any concern that air may have entered the brake system,
consult a local Ford dealer or licensed repair facility for vehicle
specific HCU brake bleeding instructions.
Apply Loctite 242 (blue) to all engine mounted fasteners.
