Specifications

TAPERED FACE

RailCorp Infrastructure Engineering Manual – Signalling

Maintenance Manual

Electric Point Machine Westinghouse Style M70 MKIII TMG E1583

4.4 Point Detector

4.4.1 Description

The point detector assembly, shown in Figure 4.4.1.2, consists of rod shaped detector

slides, Figure 4.4.1.1, which mechanically determine the position of the switches. The

mechanical movement is transferred through a detector lever assembly to open and

close the required contacts on the circuit controller.

4.4.2 Adjustment of Detector Slides

(Refer to Figures 4.4.1.1 and 4.4.1.2).

1. Crank machine to close switch furthest from the machine.

2. Adjust connecting rod of detector slide connected to the closed switch so that the

detector roller, in contact with this detector slide and nearest to the points, is just

touching the small diameter and tapered face of the detector rod.

3. Adjust connecting rod of detector slide connected to the open switch so that the

roller, in contact with this detector slide and nearest to the points, is resting in the

small diameter and about 3 mm clear of the tapered face.

4. Crank machine to close switch nearest machine.

5. Adjust sleeve of detector rod connected to the open switch so that the detector

roller, in contact with this slide and furthest from the points is resting in the small

diameter and approximately 3 mm clear of the tapered face.

6. Adjust sleeve of detector slide connected to the closed switch so that the detector

roller, in contact with this slide and furthest from the points is just touching both

the small diameter and tapered face.

7. Check the adjustment by using a 3.2mm (1 /8") facing point gauge to check that

the contacts are just made at 3.2mm switch opening.

Issue Date: 1 December 2009 Uncontrolled when Printed