Service Bulletin: SB 202.1
Subject: Bottom finish station cam housing — Vertical Shaft Locknut
Paper Machinery Corporation is pleased to offer a new vertical shaft locknut design (NT-11626 & 109-497), for the bottom finish station cam housing.
On the current bottom finish station cam housings, the Timken bearing load is set and held by locknut NT-12383 (NI-13) and lockwasher WA-10503. If the locking tab (on the lockwasher) breaks off and the locknut loosens, the Timken bearings may unload.
PMC recommends replacing locknut NT-12383 (NI-13) and lockwasher WA-10503 with clamping nut NT-11626 (photo) and spacer 109-497. This new design eliminates the lockwasher and provides a built-in locking feature.