Beretta V6-173 2.8L (1989)
Fluid Pump: Technical Service Bulletins
A/T - New Oil Pump Rotor Thickness
Number:
89-230-7A
Section:
7A
Date:
August 1989
Corporate Bulletin No.: 977135
Subject:
NEW OIL PUMP ROTOR THICKNESS
Model and Year:
1989 A, J, L CARS WITH THM 125C/HYDRA-MATIC 3T40 TRANSAXLES
TO:
ALL CHEVROLET DEALERS
BULLETIN COVERS:
New Oil Pump Rotor thickness for all THM 125C/HYDRA-MATIC 3T40 transaxles.
DATE OF PRODUCTION CHANGE:
Oil Pump Rotors with the new thickness went into production March 16, 1989, (Julian Date 075), for all THM 125C/HYDRA-MATIC 3T40 transaxles.
SERVICE ACTION:
A one inch Vernier micrometer is required to measure rotor thickness. Measurement must be made on undamaged surface. (Refer to Figure 1)
Use the original rotor measurement to determine which rotor package to order, which includes both the rotor, slide and vanes.
SERVICE PARTS INFORMATION:
Whenever ordering New Oil pump rotors refer to the following chart and part numbers.
Oil Pump Rotor Selection Chart
