ML20212D162

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Rev 1 to Maint Procedure MP 1411.06, Preventive Maint for Type Smb & Smc Valve Operators
ML20212D162
Person / Time
Site: Davis Besse Cleveland Electric icon.png
Issue date: 01/27/1987
From: Shawn Smith
TOLEDO EDISON CO.
To:
Shared Package
ML20212C847 List:
References
MP-1411.06, NUDOCS 8703040073
Download: ML20212D162 (20)
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Davis-Besse Nuclear Power Station MAINTENANCE PROCEDURE MP 1411.06 PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE VALVE OPERATORS REVISION 01 i

Concurrence: -

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Assispnt'Planf.Managfsr/DepartmentSuperintendent Date' Approved by: c r f . _ [ 9[ ,,/

TRisRMATION O MtY 5

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MP 1411.06.01 PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS

') LIST OF EFFECTIVE PAGES V .

I l l l l l 1 Page No.1 Rev. No. I Change No.*l l l i I l Page No.1 Rev. No. IChange No.*l I I I I l l l I I I I __I I I i i 1 l I l l 17 l 1 1 1 I 1 I I I 11 I I I I l 1 l l l 18 l 1 l l l l l l l l l l l 1 l 1 l l l l l l l l 1 1 I l 2 I I l l 1 I l l l l l l l l

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I I I I 4 1 1 1 I I I I I I I I I I I I l 5 l 1 I I I I I I I I I I I I i l 6 l l l 1 1 1 I I I I I I I I I l l l l 7 l 1 I l I i i l I I i 1 1 I I I 8 l 1 l I I O) k' l

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  • For restricted changes and temporarily approved changes, note the cancelling event /date as well as the change number -- e.g., C-2(R) until restart or C/TA thru 4/14/86.

t-ii MP.1411.06.01

. PREVENTIVE MAINTENANCE FOR TYPE

'SMB AND SMC LIMITORQUE OPERATORS

. TAPLE OF CONTENTS SECTION PAGE 1.0 PURPOSE .

.... . .. . . . . . . . . . . . . . . . . . 1

2.0 REFERENCES

. .. . . . . . . . . . . . . . . . . . . . . 1 3.0 DEFINITIONS .

1 .. . . . . . . . . . . . . . . . . . . . . I 4.~0 TOOLS AND EQUIPMENT . .

. . . . . . . . . . . . . . . . . 2 5.0 PRECAUTIONS AND LIMITATIONS . . . . . . . . . . . . . . .

3 6.0 PREREQUISITES .

. . . . . . . . . . . . . . . . . . . . . 3 7.0 ACCEPTANCE CRITERIA .

. . . . . . . . . . . . . . . . . . 4 8.0 PROCEDURE .

... . . . . . . . . . . . . . . . . . . . . 6 8.1 Mechanical Inapection and Lubrication Check . . . . 6 8.2 Electrical Cleaning and Inspection . . . . . . . . . 8 8.3 Limit Switch Lubricant Check (SMB only). . . . . . . 10

( 8.12 Post Maintenance Testing . . . . . . . . . . . . . . 13 9.0 DOCUMENTATION .

. . . . . . . . . . . . . . . . . . . . . 14 ENCLOSURE 1 SIGNOFF SHEET . . . . .. . . . . . . . . . . . . 15 ENCLOSURE 2 TEMPERATURE CORRECTION FACTOR . .. . . . . . . . 18 i

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MP 1411.06.01 PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS 1.0 PURPOSE 1.1 This procedure provides instructions for preventive maintenance of Limitorque operator types SMB and SMC.

2.0 REFERENCES

2.1 Davis-Besse Procedures 2.1.1 MP 1410.32, Testing of Motor Operated Valves using MOVATS 2.1.2 MP 1411.04, Maintenance and Repair of Limitorque Valve Operators Type SMB-000 and ShB-00.

2.1.3 MP 1411.05, Manitenance and Repair of Limitorque Valve Operators Type SMB-0 thru SMB-4 2.1.4 MP 1411.07, Maintenance and Repair of Limitorque Valve Operators Type SMC-04.

2.2 Manufacturer's Manuals 2.2.1 12501-G-M-55-1, SMBI-82C, Limitorque Type SMB Instruc-tion and Maintenance Manual h 2.2.2 12501-M-301N-58-1, SMCI-00 thru 2-84, Limitorque Type SMC-00 thru SMC-2 Instruction and Maintenance Manual 2.2.3 12501-G-M-51-1, SMCI-04/03-80, Limitorque Type SMC-04 and SMC-03 Instruction Maintenance Manual.

2.3 EQ Files 1

2.3.1 DB1-037A, Limitorque Valve Operator 2.3.2 DB1-037B, Limitorque Inside Containment 2.3.3 DB1-037C, Limitorque Outside Containment (AC) 2.3.4 DB1-037D, Limitorque with Dings Brake i

2.3.5 DB1-037E, Limitorque 2.3.6 DB1-037F, Limitorque.

7 3.0 DEFINITIONS 3.1 Environmental Qualification Requirement (EQ) -- Indicates a step is mandatory to ensure the continuance of Environmental Qualifications and requires Signoff.

Procedure Text Page 1 of 14 I

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MP 1411.06.01 PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS

/~ 3.2 k Sianoff (S0) -- Indication by procedure user (initials and date on Signoff Sheet) that step was performed.

4.0 TOOLS AND EQUIPMENT l

4.1 Measuring and Test Equipment 4.1.1 MOVATS 2000 or 2100 or 2150 4.1.2 Digital VOM 4.1.3 500 V Megger.

4.2 Tools and Equipment 4.2.1 Grease Sampling Tool (i.e., screwdriver, tongue depressor, hollow tube).

4.3 Parts k

4.3.1 Gasket, limit switch compartment cover, or equivalent gasket material 4.3.2 Gasket (s), limit switch cover or equivalent gasket material '

() 4.3.3 0-Ring, torque switch 4.3.4 0-Ring, limit switch 4.3.5 0-Ring, limit switch compartment cover (SMC only) 4.3.6 0-Ring, torque switch compartment cover (SMC only).

4.4 Consumable Materials 4.4.1 Electrical contact cleaner, CRC Lectra Clean, or equivalent, one can 4.4.2 Lubricant, Molykote G, or equivalent, approximately 3 ozs '

x 4.4.3 Lubricant, Exxon Nebula EP-1, amount varies 4.4.4 Lubricant, Beacon 325, approximately 6 ozs. maximum 4.4.5 Lubricant, Mobil 28, approximately 6 ozs. maximum.

i s_ / Procedure Text Page 2 of 14

5-3 MP 1411.06.01 PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS 5.0 PRECAUTIONS AND LIMITATIONS 5.1 Administrative 5.1.1 Ensure adequate understanding of the REP, radiatica and contamination levels and special requirements in the work area, if required.

5.2 Equipment 5.2.1 Record any deficiencies found during the performance of this procedure Signoff Sheet. in the Comments section of Enclosure 1, Any deficiencies found on EQ equipment shall be reported to the Foreman and EQ Coordinator.

5.2.2 Mixing incompatible greases may cause greases to solidify, liquify or produce toxic gases. Only greases specified in this procedure are to be used.

5.2.3 The limit switch has more than one source of power.

5.2.4 When replacing geared limit switch covers, ensure that the contact block is seated correctly on the frame.

5.2.5 Ensure gaskets are intact, cover bolts installed, pipe s

plugs installed and conduit fittings reassembled.

5.2.6 Do not overtighten fastening hardware and terminal hardware on torque and limit switches. These are made of material subject to cracking.

t 6.0 PREREQUISITES 6.1 Administrative (S0) 6.1.1 An NWO has been approved for performance of this procedure.

6.1.2 Obtain an REP if applicable.

6.2 Plannina i (S0) 6.2.1 i i

Circle the appropriate lubricant, for the gear box, on the Signoff Sheet.

i Procedure Text Page 3 of 14 l

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4 MP 1411.06.01 PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS

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NOTE 6.2.2 Limit switch inspection is required every 36 months.

6.2.2 Determine from history if limit switch inspection is necessary and annotate Step 8.3 on the Signoff Sheet.

6.3 Equipment (S0) 6.3.1 Record operator data on Signoff Sheet.

7.0 ACCEPTANCE CRITERIA 7.1 The following are Acceptance Criteria for EQ operators:

7.1.1 Limit switch compartment shall be free of moisture (As Left).

7.1.2 Electrical controls and contacts shall be clean (As Left).

7.1.3 Terminal connections shall be tight (As Left).

I 7.1.4 Gasket surfaces of limit switch compartment shall be V) clean and gaskets undamaged (As Left).

7.1.5 As Found Lubricant (gear case) shall:

a. Quantity -- Have worm gear immersed in grease J
b. Quality -- Ee free of contaminants
c. Consistency -- Be slightly fluid such as Nebula EP-1 (approximating NLGI-1 or thinner).

7.1.6 As Found Lubricant (limit switch (es)) shall:

a. Quantity -- Have lubricant
b. Quality -- Be free of contaminants
c. Consistency -- Be soft to the touch such as Beacon 325 (approximating NLGI-2 or thinner).

7.1.7 Valve stem shall be cleaned and lubricated (As Left).

7.1.8 Limit switch and torque switch housing 0-Rings shall not exhibit excessive grease leakage (weepage is acceptable)

(As Left).

() Procedure Text Page 4 of 14

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MP 1411.06.01

!. PREVENTIVE MAINTENANCE FOR TYPE '

SMB AND SMC LIMITORQUE OPERATORS 7.1.9 Motor shall have insulation resistance of greater than or equal to 1 Megohm (As Found).

i 7.1.10 All cover hardware is installed and tight.

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Procedure Text i.

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6 MP 1411.06.01 PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS 8.0 PROCEDURE I

NOTE 8.0 Unless specifically allowed by the procedure step or section, deficiencies shall be resolved by a follow-up MWO.

8.1 Mechanical Inspection and Lubrication Check (S0) 8.1.1 Externally inspect the operator. The inspection shall include but is not limited to:

a. Loose, missing or broken hardware -- document and tighten or replace as necessary b.

Evidence of moisture or water on the actuator or valve stem -- clean and dry as necessary

c. Dirt or high dust accumulation on the actuator or valve stem -- clean as necessary
d. Surface corrosion -- notify and correct at the Foreman's direction; document corrective action.

NOTE 8.1.2 Slight weepage of grease is normal.

(S0) 8.1.2 Inspect the operator for leakage of lubricant from gasketed or 0-Ring sealed joints.

I l I CAUTION 8.1.3 l l

l 1 Mixing incompatible greases may cause the greases l l

to solidify, liquify or produce toxic gases. I l Only Nebula EP-1 shall be used.

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l (EQ) 8.1.3 Inspect the grease in the operator as follows:

Procedure Text Page 6 of 14

7 MP 1411.06.01 i

, PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS

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8.1.3 (Continued)

NOTE 8.1.3a Each operator has at least two grease plugs on the main gear box compartment.

There is a grease plug on the motor gear box compartment, on some units,  !

which is isolated from-the main gear box compartment.

1 l I CAUTION 8.1.3a l I

i l Do not confuse the grease plugs with limit l l switch compartment conduit plugs. l l

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l a.

Remove grease plugs from the accesible main gear box compartment and as appIscable motor gear box housings.

b. Observe the quantity of grense in the actuator; O. the grease should adequately cover the gear sets.

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  • IF grease addition is required and the grease type presently in the operator is unknown (see Signoff Sheet), initiate a follow-up MWO (via the PMW0) to relube the operator.

AND DO NOT continue any further with this procedure.

(S0)

  • IF grease addition is required and the grease presently in the operator is Nebula EP-1 (see Signoff Sheet), add grease as required.
c. Using a suitable instrument, remove a small amount of grease from each plug. Grease should:

Be soft to the touch Not show evidence of excessive separation Show no evidence of dirt, water or other foreign material.

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() Procedure Text Page 7 of 14 l

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MP 1411.06.01

. PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS

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8.1.4 IF the grease does not appear to meet the criteria of 8.1.3c: *

a. Provide a sample of the grease to Maintenance Engineering for evaluation of grease acceptability for continued use.

IF the grease is unsuitable for use, initiate a follow-up MWO (via the PMWO) to relube the operator and DO NOT continue any further with this procedure.

(S0) 8.1.5 IF the grease in the operator is Nebula EP-1 (see Signoff Sheet), add approximately i ounce of Nebula EP-1 to the housing cover zerk fitting.

(S0) 8.1.6 IF the grease type in the operator is unknown (see Signoff Sheet), DO NOT grease the zerk fitting but continue with the procedure.

8.2 Electrical Cleaning and Inspection NOTE 8.2 These inspections shall be performed to the maximum extent possible without removing limit switches or torque switches except as noted.

(S0) 8.2.1 Obtain equipment clearance.

8.2.2 Remove the limit switch compartment cover.

8.2.3 On SMC operators, also remove the torque switch compartment cover.

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l CAUTION 8.2.4 l

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l The limit switch has more than one source of power. l l

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I (EQ) 8.2.4 Inspect exposed components for moisture. Should moisture be evident, dry the compartment and covers.

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l Procedure Text Page 8 of 14

9 MP 1411.06.01

- PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS

() (EQ) 8.2.5 Clean and inspect wiring, terminals and contacts to the maximum extent possible as follows:

a. Terminal connections -- tightness (tighten as required)
b. Wiring -- Fraying or Damage
c. Electrical controls and contacts -- Clean by wiping with CRC Lectra Clean, or equivalent.
d. Loose conduit fittings, tighten as required.

' (EQ) 8.2.6 Inspect the areas around the limit switch and torque switch mounting plates for evidence of excessive grease leakage. A small amount of grease weepage is normal and acceptable.

a. IF excessive leakage is found on limit switch, document in the Comments section of the MWO.

Replace the 0-Ring during the limit switch inspection Step 8.3.

b. IF excessive leakage is found on torque switch, document in the Comments section of the MWO and:

Rotate the handwheel toward mid position until the torque switch relaxes.

Note orientation of the torque switch and remove it.

Replace 0-Ring and reinstall torque switch (in same orientation as removed).

8.2.7 Inspect torque switch block and rotor assemblies for

  • Cracks
  • Signs of excessive wear.

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I (S0) 8.2.8 Record torque switch color, settings and if fiber contact shims are present.

. Procedure Text l Page 9 of 14 i

10 MP 1411.06.01 PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS d(~'g NOTE 8.2.9 Surface cracks due to post mold shrinkage is acceptable.

8.2.9 Inspect limit switch finger base assembly for:

  • Cracks Finger assemblies tight against rotors.

8.2.10 Inspect the limit switch rotor for:

! Cracking (where rotor mounts on the metal shaft with groove pin).

(S0) 8.2.11 Record limit switch color and the type of gear box (brass or aluminum).

8.3 Limit Switch Lubricant Check (SMB only) 8.3.1 Remove the limit switch compartment cover (if n eces sa ry) .

NOTE 8.3.2 Os If it is possible to open the limit switch (s) and inspect the grease and 0-Ring replacement is not required (Step 8.2.6a) go to Step 8.3.4.

8.3.2 Remove limit switch as follows:

(S0) a. Verify that the valve is either full open or full closed.

(S0) b. Note the position of contacts 1, 5, 9 and 13, as applicable.

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Procedure Text Page 10 of 14

11 MP 1411.06.01

. PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS

/% 8.3.2 (Continued)

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I l I CAUTION 8.3.2c l 1

l l Do not change valve position or limit switch l l position during the remainder of Section 8.3. l I

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l CAUTION 8.3.2c l l l l

  • Do not force the set rod (s). l l

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c.

Disengage the rotor gearing mechanism by turning the set rod (s) clockwise until it stops.

8.3.3 Remove the fasteners holding the limit switch gear box bayonet flange to the motor housing and remove the limit switch.

8'.3.4 Remove the limit switch cover (s) and gasket (s).

[V)

NOTE 8.3.5 Ensure grease in all limit switch gear boxes is inspected.

(EQ) 8.3.5 Inspect limit switch grease for the following:

( Soft and even consistency No dirt, water or other foreign substances.

a. If the grease does not meet these criteria i contact the Job Supervisor.

NOTE 8.3.5b Mobil 28 is red and Beacon 325 is grey / white. Beacon 325 will appear greenish l after a short time in service.

(S0) b. Ensure that lubricant adequately covers the gears. Add proper lubricant as required. DO NOT mix lubricant types.

Procedure Text Page 11 of 14

12 MP 1411.06.01

, PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS

(~'T 8.3.5 (Continued)

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Inspect the limit switch cover gasket (s), replace as necessary and install the limit switch cover (s).

NOTE 8.3.6 If it was not necessary to remove the limit switch to inspect the grease go to Step 8.3.8.

8.3.6 Check the condition of the 0-Ring, replace as neces-sary and reinstall the limit switch in the motor housing and tighten the fasteners.

8.3.7 Return limit switch to service as follows:

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l CAUTION 8.3.7a l l

l l Do not force set rods. l 1

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Re-engage the rotor gearing mechanism by turning the set rod (s) counterclockwise until it stops.

b. Ensure that the intermittent gear shafts cannot be. moved with a screwdriver.

(S0) c. Check the position of contacts 1, 5, 9 and 13, as applicable. Compare with positions noted in Step 8.3.2b.

IF contact positions are NOT the same, contact the Job Supervisor.

NOTE 8.3.8 IF the insulation resistance test, Step 8.4 and/or the Post Maintenance Testing, Step 8.12 are to be performed from within the limit switch compartment perform them prior to Step 8.3.8.

(EQ) 8.3.8 Install limit switch compartment cover and (SMC only) torque switch compartment cover as follows:

a. Clean gasketed surfaces.
b. Inspect cover gaskets or 0-Rings -- replace as (s neces sa ry.

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) Procedure Text Page 12 of 14

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l 13 MP 1411.06.01

- PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS (m) 8.3.8 (Continued)

c. Replace compartment covers.

NOTE 8.4 Insulation resistance readings less than 1 Megohn require Maintenance and/or Engineering Staff evaluation.

(EQ) 8.4 Perform an insulation resistance test on the operator motor at 500 VDC for 1 minute; correct per Enclosure 2, Temperature Correction Factor.

(S0) 8.5 Check the operator's T-drains, if installed, to ensure that they are not blocked. Clear as necessary.

NOTE 8.6 The stem protection cover may consist of a pipe plug in the housing cover or a pipe and pipe cap arrangement.

8.6 Remove the stem protection cover from the operator.

a. Verify that the stem capture nut (Rockwell and Conval valves only) are installed and tight.

(S0) 8.7 Clear equipment clearance as necessary to cycle the valve.

NOTE 8.8 The operator should engage easily in the manual mode, operate freely (without binding) and remain engaged in manual without further action from the operator.

(SO) 8.8" Engage the operator in manual handwheel and manually operate the valve in Open and Closed directions.

8.9 Manually operating the valve as require.:

(EQ) 8.9.1 Clean and lubricate (Molykote "G") the valve stem and stem nut.

8.9.2 Visually check the stem for burred or worn threads.

8.10 Check that the stem nut is properly staked.

8.11 Reinstall the stem protection cover.

(,,)

Procedure Text Page 13 of 14

14 MP 1411.06.01 PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS

/ 8.12 Post Maintenance Testing U

8.12.i. Ensure all parts are installed and the valve is ready to be electrically operated.

8.12.2 Hook up the MOVATS system to obtain current or motor load and switch signatures in accordance with MP 1410.32.

8.12.3 Hook up a digital voltmeter to monitor motor voltage for DC Valves.

(S0) 8.12.4 Cycle the valve electrically:

Monitor motor load and switches for AC Motors Monitor current and switches for DC Motors Record voltage for DC Motors Observe for proper operation.

8.12.5 Remove test equipment.

l 8.13 required.

Close limit switch compartment cover per Step 8.3.8, if 9.0 DOCUMENTATION

! 9.1 Process completed Signoff Sheets with the NWO.

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% Procedure Text Page 14 of 14 l

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. PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS

[N SIGNOFF SHEET MWO No.

Operator No.

Step Action Data Initials /Date 6.2.1 Lubricant Type Nebula EP-1/ Unknown /

circle one Planner 6.3.1 Operator Data Type / Size

/

Serial No. Performer Order No.

8.1.1 External Inspection SAT /UNSAT

/

(Circle one) Performer 8.1.2 External Leakage SAT /UNSAT Inspection (Circle one)

/

Performer

  • 8.1.3 Lubricant Inspection SAT /UNSAT (7.1.5) (Circle one)

/

Performer 8.1.4b Lubricant Added YES/NO Approx. Qty /

(Circle one) Performer shots /ozs/lbs

/' N 8.1.5, 8.1.6 Zerk Fitting Lubricated k s- YES/NO /

(Circle one) Performer 8.2.1 Equipment Clearance obtained /

Performer

  • 8.2.4 Electrical Components (7.1.1) Dry /

Performer

  • 8.2.5 Electrical Components (7.1.2, 7.1.3) Clean, Terminals Tight /

Performer

(7.1.8) Switch Lubricant (Circle one)

Leakage Excessive Performer 8.2.8 Torque Switch Open Setting /

Information Closed Setting Performer Color Fiber Shims Yes/No i

i 8.2.11 Limit Switch Fingerboard Color /

Information Rotor Color Performer Type BRASS / ALUMINUM (Circle one)

()

  • Denotes step which satisfies acceptance criteria.

Enclosure 1 Page 1 of 3

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v 16 HP 1411.06.01

, PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS

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SIGNOFF SHEET (Continued)

MWO No.

Operator No.

Step Action Data Initials /Date 8.3 Limit Switch Lubrication YES/NO Inspection Required (Circle one)

/

Planner 8.3.2a Valve Position OPEN/ CLOSED

/

(Circle one) Perfo rmer 8.3.2b Contact Position 1 OPEN/ CLOSED

/

5 OPEN/ CLOSED Perfo rmer

  • 9 OPEN/ CLOSED /NA 13 OPEN/ CLOSED /NA (Circle one for each)

(Circle one) Performer 8.3.5b Lubricant Added YES/NO Type _

/

(Circle one) Performer 8.3.7c Contact Position 1 OPEN/ CLOSED /

(N 5 OPEN/ CLOSED Performer

\s-) 9 OPEN/ CLOSED /NA 13 OPEN/ CLOSED /NA same as 8.3.2b? YES/NO (Circle one)

  • 8.3.8 Compartment Cover (7.1.4, 7.1.10) Installed /

Performer

  • 8.4 Insulation Resistance Phase-Ground Megohms (7.1.9) /

Performer 8.5 T-drain Clear, if Installed /

Performer 8.7 Equipment Clearance Released /

Perfo rmer 8.8 Manual Operation SAT /UNSAT

/

(Circle one) Performer

  • 8.9.1 Valve Stem and Nut (7.1.7) Cleaned and Lubricated /

Performer

  • Denotes step which satisfies acceptance criteria.

() Enclosure 1 Page 2 of 3

v 17 MP 1411.06.01

, PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS

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SIGNOFF SHEET (Continued)

MWO No.

Operator No.

Step Action Data Initials /Date 8.12.4 Valve Cycled Voltage VDC Electrically, /

Signatures Stored Performer COMMENTS:

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Signature Performer Date All acceptance criteria met

/

EQ Coordinator Date

! I i N.]\ Enclosure 1 Page 3 of 3 1

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v 18 MP 1411.06.01 PREVENTIVE MAINTENANCE FOR TYPE SMB AND SMC LIMITORQUE OPERATORS TEMPERATURE CORRECTION FACTOR m r 50 I

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