NR TWI 2P012 ISSUE 3 PDF

Introduction

This track work information (TWI) sheet explains how to inspect, adjust and maintain flat bottom adjustment switches. An inspection must be carried out to scope the work required to maintain tolerances. This could require adjustment and maintenance of the switch in a single visit. Dimensional adjustments must be carried out first. Bullhead adjustment switches should be replaced with a flat bottom switch with welded up transition rails. This job covers:

• Scoping the work – Annual Inspection – (TEF3204 appendix A)

• Associated works - maintain

• Adjusting the adjustment switch in CWR and jointed on flat bottom track

See also separate instructions:

TWI 2P013 How to understand stressing

TWI 2P042 How to renew adjustment switches