point detector gages - hitachi rail · 2015. 6. 9. · point detector gages make it possible to...

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IUNION SWITCH & SIGNAL![m) SERVICE MANUAL 5453 A member of lhe ANSALOO Group 5800 ~ Oflw. 1'111811U191t. PA 152:17

Instruction

POINT DETECTOR GAGES

A-1 Switch Machine A-5 Switch Machine A-5 Switch Machine for Midpoint (Helper) Movements M, M-2, and M-22 Switch Machines M-3 and M-23 Switch Machines M-23 Switch Machine for Midpoint (Helper) Movements S-20 and S-21 Switch Machines T-20 and T-21 Switch Machines with Standard Controller T-20 and T-21 Switch Machines with Heavy Duty Controller

March, 1951 (Revised August, 1991) C-8191·2685 MAC-5453

COPYRIGHT 19111, UNION SWITCH & SIGNAL INC. PAINTED IN USA

AN SAL DO Trasport!

IUNION SWITCH & SIGNAL I[§) SERVICE MANUAL.5453 A member of the ANSALDO Group 5800 Corporate Drive, Plnlburgh, PA 15237

Instruction

POINT DETECTOR GAGES

A-1 Switch Machine A-5 Switch Machine A-5 Switch Machine for Midpoint {Helper) Movements M, M-2, and M-22 Switch Machines M-3 and M-23 Switch Machines M-23 Switch Machine for Midpoint {Helper) Movements S-20 and S-21 Switch Machines T-20 and T-21 Switch Machines with Standard Controller T-20 and T-21 Switch Machines with Heavy Duty Controller

March, 1951 (Revised August, "1991) C-8191-2685 MAC-5453

COPYRIGHT 1gg1, UNION SWITCH & SIGNAL INC PRINTED IN USA

AN SAL DO Trasoorti

REVISION INDEX

Revised pages of this manual are listed below by page number and date of revision.

The most recent text revisions are indicated by a thick black line in the margin of the revised page.

PAGE NO. PAGE NO.

\.

CONTENTS

SECTION

I

II

GENERAL INFORMATION

1.1 SCOPE OF MANUAL

1.2 INTRODUCTION

1.3 FUNCTION OF THE POINT DETECTOR GAGES

1.3.1

1.3.2

1.3.3

1.4

Normal Position

Desired Operation

Simulated Operation

SPECIFICATIONS

GAGE CHECK INSTRUCTIONS

2.1 POINT DETECTOR GAGE CHECK OFT-20 I T-21 WITH

STANDARD CONTROLLER

2.2 POINT DETECTOR GAGE CHECK OFT-20 I T-21 WITH

HEAVY DUTY CIRCUIT CONTROLLER

2.3 POINT DETECTOR GAGE CHECK OF 5-20 I 5-21

2.4 POINT DETECTOR GAGE CHECK OF M, M-2, M-22

POINT DETECTOR

2.5 POINT DETECTOR GAGE CHECK OF M-3 and M-23

POINT DETECTOR

2.6

2.7

POINT DETECTOR GAGE CHECK OF A-1 POINT DETECTOR

POINT DETECTOR GAGE CHECK OF A-5 POINT DETECTOR

1-1

1-1

1-1

1-3

1-3

1-3

1-3

1-5

2-1

2-1

2-3

2-5

2-7

2-9

2-11

2-13

FIGURES AND TABLES

FIGURE I TABLE PAGE

Figure 1-1 Function of the Point Detector Gages 1-2 Figure 1-2 Types of Point Detector Gages 1-4 Figure 2-1 Gage Check ofT-20 I T-21 With Standard Controller 2-0 Figure 2-2 Gage Check of T-20 I T-21 With Heavy Duty Controller 2-2 Figure 2-3 Gage Check of 5-20 I 5-21 2-4 Figure 2-4 Gage Check of M, M-2, M-22 2-6 Figure 2-5 Gage Check of M-3 and M-23 2-8

Figure 2-6 Gage Check of A-1 Point Detector 2-10

Figure 2-7 Gage Check of A-5 Point Detector 2-12

-,

ii

-,

,-

. '--

SECTION I GENERAL INFORMATION

1.1 SCOPE OF MANUAL

This manual contains instructions for using the point detector gages on the following equipment:

A.

B. c. D.

E. F. G. H. I.

A-1 Switch Machine

A-5 ElectrerPneumatic Switch Machine

A-5 ElectrerPneumatic Switch Machine for Midpoint (Helper) Movements

M, M-2, and M-22 Switch Machines

M-3 and M-23 Electric Switch Machines

M-23 Electric Switch Machine for Midpoint (Helper) Movements

5-20 and 5-21 Switch Machines

T-20 and T-21 Hand Operated Switch Machine with Standard Point Detection

T-20 and T-21 Hand Operated Switch Machine with Heavy Duty Point Detection

1.2 INTRODUCTION

Point detector gages make it possible to check point detector adjustments while the switch points and

switch mechanisms are in full normal or full reverse positions. This may be done without disturbing

point detector or lock rod connections and without placing an obstruction between the switch point and

the stock rail.

When the sleeve end of a gage is applied to the point detector bar shoulder (i.e., the bevel between the

large and small diameters of the bar), the same effect is obtained as though the bar has been shifted by a

displacement of the point a distance equal to the length of the sleeve. If the roller is held by the sleeve

gage far enough to operate contacts and for a latch (if used) to catch, the bar is adjusted within the

maximum tolerance limit, thus assuring that the prescribed degree of a point opening will be detected.

If the feeler end of the gage can be inserted between the roller and the bar shoulder, the bar is adjusted

within the minimum tolerance limit, thus assuring that reasonable protection is given against undesired

operation. This gap between the roller and the bar shoulder also prevents wear of the point detector parts

due to vibration from nonnal traffic conditions.

Because of variations in the design of point detector mechanisms, different gages are required for

different groups of switch machines. The instructions in this manual correspond to the switch machines

listed in Section 1.1. For more details on the operation and design features of the switch machines, refer

to the machine-specific service manual.

5453, p. 1-1

A

B

c

1 ~----------&----Switch points closed in normal {near point) position

Switch points displaced by distance ·x·

.l ~----------~---Switch points closed in normal {near point) position

Point detector bar

Point detector bar displaced by distance ·x·

Sleeve Gao•

Sleeve gage used to simulate switch point displacement

Figure 1-1. Function of the Point Detector Gages

5453. 0. 1-2

-,

1.3 FUNcnON OF THE POINT DETECTOR GAGES

1.3.1 Normal Position

Figure 1-lA shows the switch points in their fully closed position against the near point. The point

detector bar is in its nonnal position, i.e., the point detector roller that corresponds to the near point is

positioned against the small diameter of the point detector bar.

1.3.2 Desired Operation

Figure 1-1B shows the position of the switch points after they have been displaced by distance "x" as a

result of being forced open, e.g., by a trailing move. The point detector bar is also displaced by distance

"x", causing the point detector roller to ride up the bevel of the point detector bar and onto the larger

diameter of the bar. If the switch machine is equipped with a latching mechanism, this improper forcing

of the switch points should engage the latch to hold the roller in this position even if the point detector

bar springs back after the switch points are clear, e.g., following a trailing move. Thus the latch prevents

the point detector roller from returning to the small diameter of the point detector bar, and the indication

contacts remain open.

1.3.3 Simulated Operation

Figure 1-lC again shows the switch points in their fully closed position, against the near point. The point

detector bar is in its normal position. However, with the insertion of the sleeve gage over the narrow

diameter of the point detector bar, the point detector roller is lifted to actuate the latch and/or open the

indication contacts. Thus the same displacement of the switch points shown in Figure 1-1B is simulated

without actually moving either the switch points or the point detector bar.

5453, p. 1~3

A B

' ~I ~ 0

,() N ~ ~ I ~ in < :::f i "° .. ..

N ~ f'i . ;j :1 < .:.

"';

~- n ='= ~, n• c D E F

Figure 1-2. Types of Point Detector Gages

5453, p. 1-4

1.4 SPECIFICATIONS

Equipment Point Detector Gage Part Number Eigun

A-1, A-5 Switch Machines N250287 See Figure 1-2C

A-5 Switch Machine (Midpoint Only} N451228-0501 See Figure 1-2A

M, M-2, M-22 Switch Machines N250288 See Figure 1-2D

M-3 and M-23 Switch Machines N295326 - See Figure 1-2F

M-23 Switch Machine (Midpoint Only} N451228-0601 See Figure 1-2B

T-20, T-21, S-20, S-21 Switch Machines N250289 See Figure 1-2E

5453, p. 1-5

B

c

Feeler Gage (US&S Part No. N250289)

Point detector bar and roller

Sleeve Gage (US&S Part No. N250289)

Point detector bar in original position

0

Point detector bar In original position

Latch must be unlatched

'I .1

Figure 2-1. Gage Check of T-20 I T-21 With Standard Controller

5453, p. 2-0

SECTION II GAGE CHECK INSTRUCTIONS

2.1 POINT DETECTOR GAGE CHECK OF T-20 I T-21 WITH ST AND ARD CONTROLLER

1. The point detector latching mechanism must be unlatched, i.e., the face of the latch screw

must be resting against the end of the latching finger on the point detector lever. (See Figure

2-1A.)

2. Check that the space between the point detector roller and the bevel of the point detector bar

is sufficient to permit the insertion of the feeler gage. If not, refer to Service Manual 5417 for

the adjustment procedure. (See Figure 2-1A.)

3. Pry the point detector roller out of the way and insert the sleeve gage over the narrow

diameter of the point detector bar. The sleeve gage must be tight against the bevel of the

point detector bar. The insertion of the sleeve gage depresses the end of the latch finger.

(See Figure 2-1B.)

4. Swing the latch so that the horizontal latching face of the latch screw clears the end of the

latch finger.

5. Release the latch. The horizontal latching face of the latch screw moves into position above

the end of the latch finger. There must be a clearance of 1/8 inch to 5/32 inch between the

latching faces of the latch screw and the latch finger. If not, refer to Service Manual 5417 for

the adjustment procedure .. (See Figure 2-1B.)

6. Remove the sleeve gage from the point detector bar. With the mechanism latched, normally

open contacts should be latched closed and have a contact pressure of at least 1 pound, and

nonnally closed contacts should be latched open and have a gap of at least 1/16 inch. If not,

refer to Service Manual 5417 for the adjustment procedure. (See Figure 2-1C.)

5453, p. 2-1

A Feeler Gage (US&S Part No. N250289)

: ~· Point detector bar and roller

B

,. I


Figure 2-2. Gage Check of T-20 I T-21 With Heavy Duty Controller

5453, p. 2-2

2.2 POINT DETECI'OR GAGE CHECK OF T-20 I T-21 WITH HEAVY DU1Y CIRCUIT

CONTROLLER

1. The point detector latching mechanism must be latched, i.e., the face of the latch screw must

be engaged with the end of the latching finger on the point detector lever. (See Figure 2-2A.)






point detector bar. The insertion of the sleeve gage releases the latch and the contacts close.

(See Figure 2-2B.)

4. Use a small bar to raise the contact arm so that the latching face of the latch screw clears the

end of the latch finger.

5. Release the latch. The contacts must reclose. If not, refer to Service Manual 5420 for the

adjustment procedure.

5453, p. 2-3


A Feeler Gage (US&S Part No. N250289)

Point detector bar and roller

Latch screw

B Sleeve Gage (US&S Part No. N250289)

Clearance between latching faces


c

Point detector bar In original position

Figure 2-3. Gage Check of S-20 I S-21

5453-.,lJ,, 2-4

d

2.3 POINT DETECTOR GAGE CHECK OF 5-20 I 5-21

1. The point detector latching mechanism must be unlatched, i.e., the face of the latch screw

must be resting against the end of the latching finger on the point detector lever. (See Figure

2-3A.)






point detector bar. The insertion of the sleeve gage depresses the end of the latch finger.

(See Figure 2-3B.)

4. Swing the latch gently (without unhooking the blocking spring from the cup-shaped top of

the latch screw) until the bottom of the latch screw clears the end of the latch finger.

5. Release the latch. The latch screw moves into position above the end of the latch finger.

There must be a clearance of 1/16 inch between the bottom of the latch screw and the latching

face of the latch finger. If not, refer to Service Manual 5411 for the adjustment procedure.

(See Figure 2-3B.)

6. Remove the sleeve gage from the point detector bar. With the mechanism latched, normally

open contacts should be latched closed and have a contact pressure of at least 1 pound, and

normally closed contacts should be latched open and have a gap of at least 1/16 inch. If not,

refer to Service Manual 5411 for the adjustment procedure. (See Figure 2-3C.)

5453, p. 2-5

A

Normal position cam Reverse position cam

Feeler Gage (US&S Part No. N250288) Point detector bar

B

Sleeve Gage (US&S Part No. N250288) 11

11 lilJ Polm detec:1or bar In ortglnal position

Figure 2-4. Gage Check of M, M-2, M-22

5453, p. 2-6

2.4 POINT DETECTOR GAGE CHECK OF M, M-2, M-22 POINT DETECTOR

NOTE

For M, M-2, M-22 Switch Machines equipped with selective point

detectors, refer to Section 2.5, Point Detector Gage Check of M-3 and

M-23 Point Detector.

1. Check that the space between the point detector roller and the bevel of the point detector

bar is sufficient to permit the insertion of the feeler gage. If not, refer to Service Manual

5026 (M-2), Service Manual 5035 (M-22), or Service Manual 5425 (M-22A) for the adjustment

procedure. (See Figure 2-4A.)



point detector bar. The insertion of the sleeve gage lifts the lever parallel to the point

detector bar. (See Figure 2-4B.)

3. The sleeve gage must hold the point detector roller so that both pairs of indication contacts

are lifted to the open position. If both pairs of contacts are not open, refer to the appropriate

Service Manual for the adjustment procedure. (See Figure 2-4B.)

5453, p. 2-7


A


Point detector bar

Clearance between latching faces

B


c Point detector bar in original position

= -----------~---I I

Figure 2-5. Gage Check of M-3 and M-23

5453, p. 2-8

2.5 POINT DETECTOR GAGE CHECK OF M-3 and M-23 POINT DETECTOR

1. The point detector latching mechanism must be unlatched, i.e., the latch must be clear to

allow the yoke to rest against the yoke stop. (See Figure 2-SA.)


is sufficient to permit the insertion of the feeler gage. If not, refer to Service Manual 5481 or

Service Manual 6263 for the adjustment procedure. (See Figure 2-SA.)



point detector bar. The insertion of the sleeve lifts the connecting rod and rotates the yoke so

that the latch snaps over the top of the yoke midsection. (See Figure 2-SB.)

4. Swing the latch so that the yoke dears the latch and rests against the yoke stop.

5. Release the latch. The latch must clear the yoke and snap over the top of the yoke midsection.

If not, refer to Service Manual 5481 or Service Manual 6263 for the adjustment procedure ..

(See Figure 2-SB.)

6. Remove the sleeve gage from the point detector bar. With the mechanism latched, all

indication contacts should be in the open position. (See Figure 2-SC.)

5453, p. 2-9


A


Point detector bar

B



-----if) 1:,

-----if) 11

c ,,


Figure 2-6. Gage Check of A-1 Point Detector

5453, p. 2-10

2.6 POINT DETECTOR GAGE CHECK OF A-1 POINT DETECTOR

1. The point detector latching mechanism must be unlatched, i.e., the large section of the latch

must rest on top of the slot face. (See Figure 2-6A.)


is sufficient to permit the insertion of the feeler gage. (See Figure 2-6A.)



point detector bar. The insertion of the sleeve moves the arm so that the small section of the

latch rests on top of the slot face. (See Figure 2-68.)

4. Swing the latch so that it clears the slot face.

5. Release the latch. The latch must drop down so that the small section of the latch rests on top

of the slot face. (See Figure 2-68.)

6. Remove the sleeve gage from the point detector bar. The latch must catch as shown in Figure

2-6C.

7. Push the point detector roller towards the point detector bar until the stop screw on the

opposite arm touches. With the mechanism latched, all indication contacts must be in the

open position.

5453, p. 2-11


A


Point detector bar

Latch must be engaged

B

Sleeve Gage (US&S Part No. N250287) ~MmW

Contact drums

Stop screw

c /

Figure 2-7. Gage Check of A-5 Point Detector

5453, p. 2-12

'

2.7 POINT DETECTOR GAGE CHECK OF A-5 POINT DETECTOR

1. The point detector latching mechanism must be unlatched, i.e., the latch head must be resting

on top of the latch stud. (See Figure 2-7 A.)



the adjustment procedure. (See Figure 2-7 A.)



point detector bar. The insertion of the sleeve gage forces the contact operating cranks apart

so that the latch head is withdrawn from the latch stud and dropped into position to engage

against the portion of the latch stud below its bevel. (See Figure 2-78.)

4. Lift the latch head above the latch stud.

5. Release the latch head. The latch head should drop into position to engage against the latch

stud. (See Figure 2-78.)

6. Remove the sleeve gage from the point detector bar. The latch head should engage against

the latch stud and prevent the contact operating cranks from returning to their normal

position. Therefore the indication contacts should remain open. If not, refer to Service

Manual 5044 for the adjustment procedure. (See Figure 2-7C.)

5453, p, 2-13

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