Below are PDFs of Bob Gurr's copy of the maintenance manual for the WDW Parking Lot Tram Tractor, signed by him.  There is a PDF of the full 500 pages and separate PDFs for each section

Full Manual

Part 2 - Steering

Part 4 - Power Train

Part 6 - Electrical

Part 1 - Fold Out Illustrations

Part 3 - Engine

Part 5 - Brakes

Part 7 - Gas / Lubrication / AC