LeSabre V6-181 3.0L (1986)
require replacement, care should be taken to prevent brake fluid spillage.
A.
If any evidence of brake fluid seepage is indicated, perform the following steps as outlined in the 1987 Buick Chassis Service Manual, pages
5E - 5 & 6. If no seepage is indicated, proceed to Step 3B.
1.
Replace the hydraulic pump and motor.
FIGURE 2
2.
Inspect pressure warning switch for red plastic identification band (See Figure 2). If red band is observed, the switch requires
replacement. If red band is not observed, the original switch should be transferred to the replacement pump and motor.
CAUTION: FAILURE TO FULLY DEPRESSURIZE THE HYDRAULIC ACCUMULATOR BEFORE PERFORMING SERVICE
OPERATIONS COULD RESULT IN INJURY TO SERVICE PERSONNEL AND DAMAGE TO PAINTED
SURFACES.
B.
If there is no evidence of brake fluid seepage, inspect only the pressure warning switch for red plastic identification band (See Figure 2). If
red band is observed, the switch requires replacement. Follow pressure warning switch replacement procedure in 1987 Buick Chassis Service
Manual, page 5E-6. If red band is not observed, proceed to Step 3C.
C.
If visual inspection does not indicate any parts replacement except for relay and fuses replaced in step 2, proceed to step 5.
4.
If pressure warning switch is replaced, without pump and motor replacement; check fluid level in reservoir and ensure that it is filled to mark. Do
Not overfill or underfill. Connect battery cables and turn ignition key to ON position until pump motor stops. Check for brake fluid leak.
NOTE:
Use only Dot 3 brake fluid from a clean, sealed container. Do not use any fluid from a container which is wet with water. Use of Dot 5
silicone fluid is not recommended. Internal damage to the pump components may result.
If hydraulic pump and motor is replaced:
^
Fill reservoir with brake fluid. Connect battery cables.
^
Turn ignition key to ON position until pump motor stops.
^
Check for brake fluid leak.
^
Turn ignition key OFF and discharge accumulator. See Checking and
Filling in 1987 Buick Chassis Service Manual, Page 5E-4.
^
Ensure that the brake fluid reservoir is filled to mark. Do Not overfill or underfill.
5.
Install a Campaign Identification Label
CAMPAIGN IDENTIFICATION LABEL
Each label provides a space to include the campaign number, the five (5) digit dealer code of the dealer performing the campaign service, and the date
vehicle was campaigned. This information may be inserted with a typewriter or ballpoint pen. When installing label, clean the surface of the radiator
