Heljan Class 52: Sprung Conversion Kit
The instructions are divided into sections which can be followed in the sequence
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Bearing Carriers
Subframes: Functional Parts
Bolsters
Subframes: Heljan Details
Subframes: Detail 1st Fix
Preparing the Locomotive
Wheelsets
Springs, Bogie Assembly and Rolling Test
Modifying the Bogie Drive
Pickups and Power
Powered Test
Subframes: Brake Detail
Chassis Detail
Subframes: Detail 2nd Fix
Final Assembly