Service Bulletin / Circular search help please

[Roadster90]

I was speaking to the gentleman who posted the 90 drop top in Ohio for sale this evening, and he stated that there was a service bulletin relating to the Reatta or Rivi brakes concerning a sharp pulling to one side or the other when braking. As he recalled the bulletin called for and he replaced a 1100.00 item which can only be the Teeves. I would really like to view this bulletin if anyone has any knowledge of or knows how to locate it please........

thanks,

Nic

Incidently, the drop top he has for sale seems to be a nice driver from his description. Was posted late last week or the 1st of this week.

[slimpikn]

this might be what you are looking for

Brakes - Intermittent Pull Under Hard Braking

Group Ref.: Brakes

Bulletin No.: 315004

Date: January, 1994

INTERMITTENT PULL WITH A HARD BRAKE APPLY DURING NON-ABS STOP ON ABS EQUIPPED VEHICLES (REPLACE ABS VALVE BLOCK/PRESSURE MODULATOR VALVE)

MODELS:

1986-90 BUICK ELECTRA

1986-91 BUICK LESABRE

1988-90 BUICK RIVIERA, REATTA

1991 BUICK PARK AVENUE

1986-91 CADILLAC DEVILLE, FLEETWOOD

1988-90 CADILLAC ELDORADO, SEVILLE

1986-91 OLDSMOBILE NINETY-EIGHT, EIGHTY-EIGHT

1988-90 OLDSMOBILE TORONADO, TROFEO

1986-91 PONTIAC BONNEVILLE

EQUIPPED WITH ANTILOCK BRAKES

THIS BULLETIN IS BEING REVISED TO ADD THE 1991 MODEL YEAR FOR "C" AND "H" VEHICLES INCLUDING PART AND WARRANTY INFORMATION. PREVIOUS DIVISIONAL PUBLICATION NUMBERS WERE:

DIVISION BULLETIN NUMBER

BUICK 90-5-17

CADILLAC T-93-134

GM OF CANADA 315004R

OLDSMOBILE 90-T-213

PONTIAC 90-5-19

Some owners may comment on intermittent pull with a hard brake apply, but without ABS activation. The intermittent pull can be either to the left or right and only occurs with hard non-ABS stops.

This condition may be due to a base brake condition, loose suspension component, or the Antilock Brake System. When working on a vehicle with this condition, use the following procedure:

1. Inspect the base brake system. Check for loose or binding calipers, damaged rotors, or restricted brake lines. Refer to Section 5 of the applicable Service Information Manual for complete inspection and repair procedures.

2. Inspect the suspension system. Check for loose control arms, damaged struts, or bushings. Refer to Section 3 of the applicable Service Information Manual for complete inspection and repair procedures.

3. If nothing is found during the above inspections, replace the AntiLock brake system valve block, (pressure modulator valve for 1991 models). Follow the procedure in the appropriate Service Information Manual.

1986-87 C/H Models Valve Block ......... P/N 25530880

1988-90 C/H Models Valve Block ......... P/N 25533639

1988-90 E/K Models Valve Block ......... P/N 1646523

1991 C/H Models Pressure Modulator

Valve ................................... P/N 25559182

[Roadster90]

Tom,,

Many, many thanks....need some help here though...am I to take this as the "thing" under the master cylinder or in other words called Mr. Teves????

[slimpikn]

location of what is called

Valve Block

On RH Side Of Brake Hydraulic Unit

hope this is helpful? i'm in NO way a mechanic!!!!!!

[Roadster90]

Thought I would find and repost this as Jim Finn is having a problem with one of his vehicles that demonstrates the enclosed symptoms.....

Nic

[Jim]

The valve block is the unit mounted on the side of the whole ABS unit mounted on the firewall. The valve block is held to the master cylinder with 4 bolts. You will need to remove the three lines coming out of the bottom of the block. There are "O" rings sealing the passages between the block and the master cylinder.