Bettis M3 AND M3HW Jackscrew Operating instructions

Service Instructions

153701 Rev. D

October 2014

Operating Instructions M3 and M3HW

Jackscrew Manual Override

Service Instructions

153701 Rev. D

Table of Contents

October 2014

Table of Contents

Section 1: Operating Instructions for CBA M3/M3HW, NCBA

M3, CBB M3/M3HW, NCBB M3, G M3/M3HW and

NG M3 Series (Jackscrew Override)

1.1 Operating Procedure for M3 Jackscrew ....................................................... 1

1.2 Return M3 to Regular Service ...................................................................... 2

Section 2: Operating Instructions for HD, NHD, T and NT

Series M3/M3HW (Jackscrew Override)

2.1 Operating Procedure for M3 Jackscrew ....................................................... 3

2.2 Return M3 to Regular Service ...................................................................... 3

Section 3: Document Revision

Table of Contents I

1

Section 1: Operating Instructions

October 2014

Service Instructions

153701 Rev. D

Section 1: Operating Instructions for CBA

M3/M3HW, NCBA M3, CBB M3/

M3HW, NCBB M3, G M3/M3HW

and NG M3 Series

(Jackscrew Override)

NOTE:

The M3/M3HW have left handed threads (that is, rotate counterclockwise to screw in).

NOTE:

For operating instructions for the “HD” Series M3/M3HW (Jackscrew Override), skip

Page 1 and proceed to Page 2.

1.1 Operating Procedure for M3 Jackscrew

1.1.1 Bleed off and remove all pressure to the actuator. On double-acting actuators, make sure that both ends of cylinder (s) are exhausted and vented to atmosphere.

1.1.2 Apply a generous coating of grease to the M3 threads before operating.

1.1.3 Loosen the M3 locking nut and turn M3 counterclockwise sufficiently to allow for the customers' desired actuator travel (that is, to screw in and override the actuator).

Operating Instructions

Service Instructions

153701 Rev. D

1.2

Section 1: Operating Instructions

October 2014

Return M3 to Regular Service

1.2.1 Turn M3 clockwise until the actuator is returned to its original position.

1.2.2 If desirable, wipe away excess grease on M3 after operation.

NOTE:

If preferred, grease may be left on M3 to provide additional corrosion protection.

1.2.3 Turn jam nut counterclockwise until tight.

1.2.4 Restore supply pressure to the actuator's power cylinder.

Operating Instructions 2

3

Section 2: Operating Instructions Part 2

October 2014

Service Instructions

153701 Rev. D

Section 2: Operating Instructions for HD,

NHD, T and NT Series M3/M3HW

(Jackscrew Override)

NOTE:

The M3/M3HW have right handed threads (that is, rotate clockwise to screw in).

2.1

2.2

Operating Procedure for M3 Jackscrew

2.1.1 Bleed off and remove all pressure to the actuator. On double-acting actuators, make sure that both ends of cylinder (s) are exhausted and vented to atmosphere.

2.1.2 Apply a generous coating of grease to the M3 threads before operating.

2.1.3 Loosen the M3 locking nut and turn M3 clockwise sufficiently to allow for the customers' desired actuator travel (that is, to screw in and override the actuator).

Return M3 to Regular Service

2.2.1 Turn M3 counterclockwise until the actuator is returned to its original position.

2.2.2 If desirable, wipe away excess grease on M3 after operation.

NOTE:

If preferred, grease may be left on M3 to provide additional corrosion protection.

2.2.3 Turn jam nut clockwise until tight.

2.2.4 Restore supply pressure to the actuator's power cylinder.

Operating Instructions Part 2

Service Instructions

153701 Rev. D

Section 3: Document Revision

October 2014

Section 3: Document Revision

Table 1.

ECN

VAWCO925

Revision Overview

DATE

January 2011

REV

D COMPILED

CHECKED

APPROVED

BY *

B. Jumawan

D. Blahnik

DATE

14 January 2011

14 January 2011

Kenneth Chin 14 January 2011

* Signatures on file Emerson, Actuation Technologies, Waller, Texas

Document Revision 4

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