Allis Chalmers LTC – Internal Inspection – Required adjustment of operating mechanism, it was not commutating properly between taps. Trigger device on indexing cam was not working properly. Other service on this design includes replacement of re-versing switch contacts due to severe coking along with the reversing switch drive shafts. We have also worked on control problems resulting in change out of micro-switches internal to oil compartment.
GE LRT 72 – Inspection – Unit was found to have a slight water leak in large mechanical relief gasket allowing water to leak into the compartment. Cleaned up the rust, painted the affected area and re-gasketed the large PRD. Also repaired the paper taping as needed on the leads. This unit was found to have 2 phases with cracked moving contact mounts on the operating shaft. These were replaced, flushed and filled with new oil.
The operating shaft on this unit is a hardwood design with a blind pin holding the moving contact mounting collar in place. Special tooling is required to properly locate the replacement moving contacts.