DeVille V8-273 4.5L (1989)
Brake Proportioning/Combination Valve: Technical Service Bulletins
ABS - Revised Proportioner Valve Service
NO.: 90-I-50A
DATE:
April, 1990
GROUP:
5 CORP. NO.: 005001
SUBJECT:
SERVICE INFORMATION MANUAL UPDATE - SECTION 5E ANTI-LOCK BRAKE SYSTEM
This bulletin is being reprinted because the models affected were not specified. Please discard DSIB 90-I-50.
Please update your 1989-1990 DeVille and Fleetwood Service Information Manuals, Section 5E, to include the following procedure to remove and
inspect the proportioner valve.
PROPORTIONER VALVE
Remove or Disconnect:
1.
Depressurize hydraulic accumulator. Refer to "Depressurizing Hydraulic Accumulator" in this section.
CAUTION:
Failure to depressurize the hydraulic accumulator prior to performing this operation may result in personal injury and/or damage to
painted surfaces. Refer to CAUTION on page 5E-1.
2.
Raise vehicle. Refer to "General Information" in Section 0A.
3.
Brake feed line from proportioner valve and plug.
4.
Outlet pipes to rear wheels and plug.
5.
Proportioner valve.
Figure 1 - Adjust Brake Line Clearances
Install or Connect:
1.
Proportioner valve to outlet pipe.
2.
Brake feed line to proportioner valve. Adjust brake line clearances per Figure 1. Tighten brake lines to 15 N-m (11 lb.ft.).
3.
Fill fluid reservoir. Refer to "Checking and Filling Brake Fluid" in this section.