Ford 550, 3400, 3500, 4400, 4500, 5500, 5550, Loader Backhoe service

This manual DOES NOT COVER THE ENTIRE TRACTOR! 3400 - 550 industrial tractors - you need two service manuals. You need the standard 2000, 3000, 4000, 5000 service manual or an I&T version - and the "Industrial Derivatives" manual(this one) that covers components specific to the industrial tractors (e.g., heavier front ends, transmissions, unique hydraulics, and a few other things in the Misc section). The industrial manual does not include an engine, fuel, electrical or tractor hydraulic section. . .
Sections Covered:

Manual Reversing Transmission
4-Speed Power Reversing Transmission
6-Speed Power Reversing Transmission
Clutches
Steering & Front Axle
Separating the Tractor
550 Loader-Backhoe & Hydraulics
Misc

The 5500 model is not specifically mentioned, however it's essentially the same and this manual should work for it.