scope:

Introduction

This Track Work Instruction covers how to referrule baseplates and chairs.

Ferrules are provided to take up any irregularities in chair/baseplate castings and to prevent metal to metal contact between chairscrews and castings.

There are two types of ferrule:

Ordinary ferrules as illustrated opposite.

'Top hat' ferrules for CS1B chairs or PAN9 baseplates

This instruction deals with the ordinary ferrule.

See also separate instructions:

TWI 2C013 How to install a chair screw

TWI 2C031 How to recognise a broken baseplate/chair

TWI 2C033 How to install maintenance coils

TWI 2P048 How to change a plain line baseplate or chair

TWI 2S017 How to replace a slide baseplate/chair

TWI 2S074 How to install a check baseplate/chair