British Rail Drivers Manual - Fault Finding Data and Charts for Class 56
Locomotives
Date of Issue: Unknown - Issue 2 - BR
33056/44.
More information can be found here
Wikipedia - British Rail Class 46 -
Derby Sulzers Website
More Information Regarding Preserved Class 46 Locomotives can be
found on the following websites:
Preserved-Diesels - Llangollen-Diesels