Safeworking - Electro-Hydraulic Point Machines

Question 1

What is the purpose of an Electro-Hydraulic Point Machine?

Answer 1

• Enable points to be controlled either Remotely or by a Signaller
• In case of failure, be operated by a Driver/Competent Worker acting under instructions of the Signaller/Train Controller

Question 2

What are the 3 components of a EHPM?

Answer 2

• POWER/MANUAL switch
• RED DIRECTIONAL Control lever
• PUMP HANDLE SOCKET WITH PUMP HANDLE

Question 3

What are the 2 positions of the POWER/MANUAL Switch?

Answer 3

• POWER - Allows REMOTE operation of the points for normal running of trains
• MANUAL - Holds applicable Fixed Signals at DANGER and allows manual operation of points

Question 4

What are the 3 positions of the DIRECTIONAL CONTROL LEVER?

Answer 4

• Normal
• Centre
• Reverse

Question 5

When operating the PUMP HANDLE the DIRECTIONAL CONTROL LEVER must be?

Answer 5

Held in position

Question 6

What is the purpose of the DIRECTIONAL CONTROL LEVER?

Answer 6

To select the direction of the points

Question 7

What is the purpose of the PUMP HANDLE?

Answer 7

To pump the points until they are lying in the required position and fully HOME AND LOCKED

Question 8

Who may remove a Locking Bar or Point Clip and restore the POWER/MANUAL Switch to the POWER position?

Answer 8

Signal Maintenance Technician