RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 Electric Point Machine Westinghouse Style M70 MK III TMG E1583 Owner Version 1.0 Issue Date: 1st December 2009 Chief Engineer Signals Revision Control Table Revision 1.0 Date of Approval 1/12/2009 ECP/DCN No. Summary of change First issue. Contents 1 ASSEMBLED AND EXPLODED VIEWS WESTINGHOUSE 'M70' MKIII POINT MACHINE ............................................
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 4.5.1 Description ......................................................................................................... 29 4.5.2 Adjustment of Detector Push Rods ..................................................................... 29 4.6 POINT CONTACTOR ..................................................................................................... 29 4.6.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 1 Assembled and Exploded Views Westinghouse 'M70' MKIII Point Machine Figure 1.1 Assembled View Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 Figure 1.2 Exploded View Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 2 General Description, Operation, Installation and Wiring Figure 2.1 Main Components of Throw and Lock Mechanism Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 2.1 General Description The Westinghouse Brake & Signal Co. "M70" Mk Ill point machine is similar in design to the McKenzie and Holland Style 'M' machines. It comprises a throw and lock mechanism driven by an electric motor, both of which are housed in a single cast iron casing.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 Figure 2.2 Main Operation Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 2.2 Operation The components of the main operating mechanism are shown in Figure 2.1. The operation of the mechanism when power is applied to the main crank is shown in Figure 2.2 and is described below: 1. Normal position (Figure 2.2-1) A reverse movement is commenced by a clockwise rotation of the main crank.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 Figure 2.3.1 Left Hand Layout of Style ‘M70’ MKIII Figure 2.3.2 Right Hand Layout of Style ‘M70’ MKIII Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 2.3 Installation The right and left hand layouts of the M70 MKIII point machine are illustrated in Figures 2.3.1 and 2.3.2. For complete details of layouts refer to "Switch and Detail Layouts — Power Operation Book" (SRA publication). 2.3.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 10. Fit and align switch machines on tie plates. 11. Drill 4 x 21mm holes through tie plates and scarfed timber. 12. Fit switch machine using specified hexagon bolts with headlock washers underneath, round and spring washer on top. 13. Assemble lock and detector slides to machine as described in Section 2.3.3 A and B. 14.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII 2.3.3 TMG E1583 Installation of Lock and Detector Slides A Installation of Lock Slides 1. Assemble lock slides with serrations together. 2. Using manual operation, throw the switch to the mid-stroke position. 3.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 Figure 2.4 Internal Wiring Diagram ‘M70’ MKIII Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 2.4 Wiring The internal wiring is in high temperature PVC insulated wire, 50/02.mm (70/.0076) for motor circuits and 30/0.2mm (40/.0076) for control and detection circuits. Wiring between the terminal board and the circuit controller is protected by a rigid PVC conduit.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 3 Major Specifications Figure 3.1 Overall Dimensions Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 3.1 Technical Details The technical information describing the 'M70' MKIII point machine is tabulated in Table 3.1. Table 3.1 M70 MKIII Point Machine Technical Information Item Description Motor 110V, D.C., Split Field Point Controller Thrust Rated 50V, D.C. Thrust Rated 3000N Approx. Thrust Maximum 4500N Approx.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 4 Components – Replacement, Servicing and Adjustments Figure 4.1.1 Motor M70 MKIII Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 4.1 Motor 4.1.1 Description The point machine is fitted with a plug-connected series-wound motor, as shown in Figure 4.1.1. The split field enables a regenerative braking circuit to provide snubbing at the end of the stroke. The plug connector is indexed to prevent use of a wrong type motor.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 Figure 4.2.1 Gear Train Assembly Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 4.2 Gear Train and Clutch Assembly 4.2.1 Description The motor drives a spur gear train, which in turn drives a worm through a friction clutch. The worm engages the main gear, which drives the lock and throw mechanism. The clutch protects the mechanism from shock at the end of the movement and also when the points are obstructed.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 Figure 4.2.3.1 Cross -Section of Friction Clutch Figure 4.2.3.2 Special Tool Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII 4.2.3 TMG E1583 Overhaul of Clutch The cross-section of the friction clutch is shown in Figure 4.2.3.1. Overhaul of the clutch should be carried out as follows: 1. Measure length of clutch spring before dis-assembling and note this dimension. 2. Remove adjusting nut and clutch spring and slide clutch housing off shaft.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 Figure 4.3.1 Point’s Throw and Lock Mechanism Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 4.3 Points Throw and Lock Mechanism 4.3.1 Description The points throw and lock mechanism, Figure 4.3.1, consists of the slide bar, the throw bar, the main crank, the lock box and lock slides. The main crank, driven by the gear train, operates the throw and slide bars to throw and lock the points.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 Figure 4.4.1.1 Detector Rods Figure 4.4.1.2 Point Detector Assembly Version 1.
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. TAPERED FACE 4.4.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 Figure 4.5.1 Circuit Controller Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 4.5 Circuit Controller 4.5.1 Description The circuit controller shown in Figure 4.5.1, comprises of two sets of sealed contacts for the points detector and two sets of snap action motor contacts.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII 4.7.2 TMG E1583 Rectifier A bridge rectifier is fitted next to the motor protection unit, as shown in Figure 4.7.1, to convert the incoming A.G. supply current to D.C. operating current. Figure 4.6.1 Point Contactor Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 Figure 4.7.1 Terminal Board, Motor Protection Unit and Rectifier Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 Figure 4.8.1 Cut-Out Switch Assembly Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 4.8 Manual Cranking Device 4.8.1 Description Manual operation is obtained by inserting a crank handle through a separately covered hole in the cover of the machine. Opening of the cap on the cover reveals the yoke of the cut-out mechanism, shown in Figure 4.8.1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 5 Maintenance Procedures 5.1 General Before commencing, notify the signalman and carry out normal safeworking procedures. All PPE applying to personnel working on or near the track must be observed. Whenever possible the maintenance activities of the Signal Electrician and the Signal Sectionman should be performed simultaneously. 5.
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.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 25mm x 150mm strip of emery cloth tightly around the commutator, face out wards and rotate against the brush in both directions until seating is improved. 5.9 Circuit Controller and Detector Contacts Visually check the condition of all contacts and observe the operation of each contact assembly ensuring adequate wipe of the contacts as the machine is operated by hand.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 Figure 5.15 Lubrication Diagram Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 5.15 Lubrication Remove the covers to the machine and lubricate all moving parts as indicated on the Lubrication Diagram 5.15 and with lubricants specified in Table 5.15. Table 5.15 Lubrication Parts Lubricants Remarks Small pins and sliding parts marked "0". Oil SAE – 30 Clean the parts well before applying.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 6 Parts List and Drawings Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 6.1 Electric Point Machine Complete, ‘M70’ MKIII Item No. 1 2 3 4 5 6 7 8 9 10 11 12 Item Description Manufacturer's Part No. 17 18 Cover, Complete Stud Roller — 2 in. Dia. Roller — 1 3/4 in. Dia. Lock Box Cover — Crankcase Crank — Main Bar — Slide with connector Block — Terminal, 4 Way Detector Slide, Complete Detector Lever Assembly (Double) Bolt, 3/8 in. B.S.W.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII Item No. 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 Item Description TMG E1583 Manufacturer's Part No. Steel, Tin Plate Washer, Spring, 3/8 in. Cad. Plate Washer, Special Gear Box Assembly, Complete Cover, Gear M6797 4024/16 AM1780-89/1 M23834 M21879 Washer, Spring 1/2 in., Tin Plate Screw, 1/2 in. BSW x 1 1/2 in.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 6.2 Gear Box Assembly, Complete Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Item Description Manufacturer's Part No. Bush, Upper — Main Crank Nut, 1 in. BSW Hex. Slotted Pin, Split Cotter 3/16 in. Dia x 1 5/8 in. Lg. Tin Plate Bush, Lower — Main Crank Main Crank Worm Wheel Screw, 1/2 in.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 6.3 Circuit Controller and Detector Lever Assembly, Complete Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Item Description Manufacturer's Part No. Washer, 7/16 in. Dia., Tin Plate Spring, Coil Cover Plate, Lock Box Push Rod Nut, Special 5/16 in., BSW, Hex. Arm. Detector Link Pin 7/16 in. Dia Pin, 3/8 in.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 6.4 Detector Slide Assembly Item No. 1 2 3 4 5 6 7 8 Item Description Manufacturer's Part No. Nut Hex. ¾ in. BWS, Bright MS, Cad Plate Sleeve, Complete Slide, Detector Locknut, ¾ in. BSW, STD. Hes., Black M.S., Cad. Plate Nut ¾ in. BSW, Hex., Black MS, Cad. Plate Lug, Drop-Short Lug, Drop-Long Bolt and Nut, ¾ in. BSW x 2 ½ in. Lg., Hex, Hd. Washer, Spring, ¾ in.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 6.5 Lock Slide Assembly Item No. 1 2 3 4 5 6 7 8 Item Description Manufacturer's Part No. Lock Slide, Rear Lock Slide, Front Bolt, ¾ in. BSW x 2 ¾ in. Lg Hex. Hd., Steel, Cad. Plate Washer, ¾ in. Std., Steel Washer, Spring, ¾ in. Nut ¾ in. BSW. Hex. Steel Lug – Prop Bolt and Nut, ¾ in. BSW x 2 ½ in. Lg. Hex. Hd. Steel Version 1.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 6.6 Cut-Out Switch Assembly Item No. 1 2 3 4 5 6 7 8 Item Description Manufacturer's Part No. Cut out Switch Plunger Spring Loaded Plate Adjusting Nut Adjusting Rod Base Plate Yoke Spring Version 1.0 Issue Date: 1 December 2009 M.I. No.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII TMG E1583 7 Diagnostic Fault Finding Charts 7.1 Fault Finding Chart 1 - Point Machine Not Operating Fault Most Likely Causes Point machine does not operate when control circuit is energised Internal contactor or N or R relay not operating Check control circuitry.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII 7.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII 7.3 TMG E1583 Fault Finding Chart 3 - Operation of Throw Mechanism Slow or Jerky Throw mechanism operation abnormally slow or jerky Emergency Action Most Likely Causes Fault Machine or rodding damaged by run-thru or dragging equipment If practical repair damaged components.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII 7.
RailCorp Infrastructure Engineering Manual – Signalling Maintenance Manual Electric Point Machine Westinghouse Style M70 MKIII 7.5 TMG E1583 Fault Finding Chart 5 - Point Machine Operates Only in Normal or Reverse Position Emergency Action Fault Most Likely Causes Point machine operates in normal or reverse position only Open circuit contacts in points contactor Faulty toggle mechanism or associated motor control switch Points obstructed Obstruction in point mechanism Version 1.
