Specifications

RailCorp Infrastructure Engineering Manual – Signalling

Maintenance Manual

Electric Point Machine Westinghouse Style M70 MKIII TMG E1583

5.4 Examine Track Conditions at Switch Location

Examine track in respect to ballast condition and rail movement at switch heel, fit of

switch to stock rail, condition of chairs, bolts and spikes. If lateral or longitudinal

movement is detected, notify the civil maintainer for rectification.

5.5 Adjust Facing Point Locks (F.P.L.)

Facing point locks must be tested to ensure that the switches are kept tight against the

running face of the stock rail, and to ascertain if "A" chairs or stock rails are worn. The

following steps should be conducted under manual operation:

(i) Adjust lock slides in accordance with procedures outlined in Section 4.3.2.

(ii) Test adjustments in the following manner:

(a) Insert a 1.6mm (1.16") gauge between the point of the switch and stock rail.

The lock should be adjusted such that locking is completed.

(b) Insert a 3.2mm (1 /8") gauge between the point of the switch and the stock

rail. The lock should be adjusted so that locking cannot be completed. Re-

adjust if necessary and repeat step (a).

5.6 Adjust Detector Slides

Adjust detector slides in accordance with procedures outlined in Section 4.4.2. and

ensure that contacts are just made with the 3.2mm gauge inserted between switch and

stock rail.

5.7 Check Switch Travel

Ensure that travel at the point of the switch is correct at 115mm.

5.8 Motor Maintenance

The motor is equipped with sealed ball bearings which eliminates the need for

lubrication. The operation of the motor should be observed at each maintenance visit.

If it shows signs of abnormal noise, slackness in the bearings or heavy burning of the

commutator, the motor should be exchanged and forwarded to the workshops for over

haul. If the motor is operating properly, the only maintenance required is as follows:

a) Check the wear on the brushes and replace them if necessary. Do NOT

interchange the brushes. Brushes should not be removed unless absolutely

necessary. If they are removed, care should be taken to ensure that brushes are

replaced in the same positions as they were in prior to removal.

b) If the commutator has a polished bronze or coffee-coloured finish leave

untouched. Otherwise clean carbon dust off the commutator and brushes and

clean the commutator with a chamois. Do not use emery paper to clean the

commutator. If commutator is burnt, clean with fine glass paper and polish with a

chamois.

c) Check that the brushes slide freely in their holders.

d) Check by observing the motor in operation that the brushes are seating over the

full width. (Poor seating is evidenced by uneven arcing.) If they are not, hold a

Issue Date: 1 December 2009 Uncontrolled when Printed