scope:

This work instruction specifies:

1) how to install and set up the Hy-Drive Supplementary Point Drive System when used on Network Rail controlled infrastructure; 

NOTE: This system is used in conjunction with an In-bearer Clamp lock to create the Hy-Drive Points System. This applies to systems that are used to operate switch lengths C to H switch on NR60/NR60 Mark 2 S&C and switch lengths F to G on NR56V S&C.

2) key differences between the Hy-Drive Mk1 and Mk2 designs (for NR60); and 

3) differences introduced with the introduction of NR56V Hy-Drive.

This work instruction covers the Hy-Drive systems used in NR60 Mark 1, NR60 Mark 2 and NR56V S&C (shown in Table 1).

It applies to staff assessed as competent to install and maintain Hy-Drive Supplementary Point Drive systems.

Purpose

This work instruction supports the installation and maintenance of the Hy-Drive Supplementary Point Drive System. It is intended to control the risk of incorrect componentry and set-up being applied in Hy-Drive systems. It is a reference document to support staff working with the system.