Diesel Engine - Downhill/Deceleration Surge

87chevy29
GMC NUMBER: 87-T-101

GROUP: 6C - Engine Fuel

DATE: November, 1987

CORPORATE
NUMBER: 766305
SUBJECT: DOWNHILL/DECELERATION SURGE

MODELS: 1982 - 87 C/K, R/V, G, P WITH 6.2L DIESEL ENGINES
THIS BULLETIN CANCELS AND SUPERSEDES TRUCK SERVICE BULLETIN 86- B-7 DATED OCTOBER, 1985/CHEVROLET BULLETIN 85-150, DATED NOVEMBER, 1985, ALL COPIES OF WHICH SHOULD BE DESTROYED.
Some vehicles may experience vehicle surge when descending a hill or in a deceleration mode. New parts have been designed to alleviate vehicle surge problems. The parts are available only through authorized Stanadyne Diesel System (SDS) distributors and dealers. The, parts include a delivery valve spring, redesigned stop, and a new flatted delivery valve.
Parts required:

Description SDS#
Delivery valve spring 26071
Delivery valve stop 26070
Delivery valve - all models 26833
except G-Van
Delivery valve - G-Van 28012

Prior to removing a pump for repair, contact an authorized SDS distributor or dealer to ensure the new parts are in their stock. The injection pump must be removed from the engine for completion of repairs.