Survitec Group Crewsaver Crewfit Twin 275N Service Manual Download Page 31

Crewsaver -  

Servicing Manual: Crewsaver Crewfit 275 Lifejacket

                        

Date:  November 2016
Issue No: 14 

Page

of 43

31

6.1.1. Air Holding Test.
 

6.1.1.1  Connect through a suitable Tee piece and adaptor, the oral tube with the oral valve in the open

 

 

position, to a graduated water manometer (or a similar digital device for measuring back pressure).

 

Note: Hammar inflators must be tested with the Hammar operating head fitted to the inflation chamber.

  

6.1.1.2  Slowly inflate the lifejacket from a regulated supply until manometer reads 200mbar

Warning: Regulated supply pressure must not exceed 20psi.

 

6.1.1.3  Close off the air supply and leave for 10 minutes to ensure pressure is stable.

 

6.1.1.4  Check and record the pressure and temperature reading on the Service Record Sheet.

 

6.1.1.5  Leave for 30 minutes.

 

6.1.1.6  Check and record the pressure and temperature reading on the Service Record Sheet.

 

 

The  maximum  difference  in  the  two  pressure  readings  (pressure  drop)  allowed  is  10%.  The

 

 

temperature  differential  shall  be  within  plus  or  minus  3  degrees  of  the  original  reading.  For  each

 

 

degree  Centigrade  rise  in  temperature  subtract  2.5  mbar.  For  each  degree  Centigrade  drop  in

 

 

temperature  add  2.5  mbar  to  the  readings  to  obtain  the  actual  pressure  variation.  Should  the

 

 

temperature variation be outside 3 degrees either way then the test shall be repeated.

 

 

 

 

 

 

6.1.1.7.2  Identify and mark the source of leakage. Wash off in clean water and allow to dry naturally in air.  

 

 

 

 

 

6.1.1.7.2.1  Special Attention to be given to:

 

 

 

a) Manifold Schrader Core

 

 

 

b) Oral Tube/ Top-up Valve

 

 

 

6.1 

Inflation Chamber

6

   Section   

PSI

in/H

2

O

in/Hg

mm/H

2

O

mm/Hg

kg/cm

2

bar

mbar

Pa

kPa

1.0

27.71

2.036

703.1

51.75

0.0703

0.0689

68.95

6895

6.895

1.1

30.48

2.240

773.4

56.93

0.0773

0.0758

75.85

7585

7.585

1.2

33.25

2.443

843.7

62.10

0.0844

0.0827

82.74

8274

8.274

1.3

36.02

2.647

914.0

67.28

0.0914

0.0896

89.64

8964

8.964

1.4

38.79

2.850

984.3

72.45

0.0984

0.0965

96.53

9653

9.653

1.5

41.57

3.054

1054.7

77.63

0.1055

0.1034

103.43

10343

10.34

1.6

44.34

3.258

1125.0

82.80

0.1125

0.1102

110.32

11032

11.03

1.7

47.11

3.461

1195.3

87.98

0.1195

0.1171

117.22

11722

11.72

1.8

49.88

3.665

1265.6

93.15

0.1265

0.1240

124.11

12411

12.41

1.9

52.65

3.868

1335.9

98.33

0.1336

0.1309

131.01

13101

13.10

2.0

55.42

4.072

1406.2

103.50

0.1406

0.1378

137.90

13790

13.79

2.1

58.19

4.276

1476.5

108.68

0.1476

0.1447

144.80

14480

14.48

2.2

60.96

4.479

1546.8

113.85

0.1547

0.1516

151.69

15169

15.17

2.3

63.73

4.683

1617.1

119.03

0.1617

0.1585

158.59

15859

15.86

2.4

66.50

4.886

1687.4

124.20

0.1687

0.1654

165.48

16548

16.55

2.5

69.28

5.090

1757.8

129.38

0.1758

0.1723

172.38

17238

17.24

2.6

72.05

5.294

1828.1

134.55

0.1828

0.1791

179.27

17927

17.93

2.7

74.82

5.497

1898.4

139.73

0.1898

0.1860

186.17

18617

18.62

2.8

77.59

5.701

1968.7

144.90

0.1968

0.1929

193.06

19306

19.31

2.9

80.36

5.904

2039.0

150.08

0.2039

0.1998

199.96

19996

20.00

3.0

83.13

6.108

2109.3

155.25

0.2109

0.2067

206.85

20685

20.69

3.1

85.90

6.312

2179.6

160.43

0.2179

0.2136

213.75

21375

21.37

3.2

88.67

6.515

2249.9

165.60

0.2250

0.2205

220.64

22064

22.06

3.3

91.44

6.719

2320.2

170.78

0.2320

0.2274

227.54

22754

22.75

3.4

94.21

6.922

2390.5

175.95

0.2390

0.2343

234.43

23443

23.44

3.5

96.99

7.126

2460.9

181.13

0.2461

0.2412

241.33

24133

24.13

3.6

99.76

7.330

2531.2

186.30

0.2531

0.2480

248.22

24822

24.82

3.7

102.53

7.533

2601.5

191.48

0.2601

0.2549

255.12

25512

25.51

3.8

105.30

7.737

2671.8

196.65

0.2671

0.2618

262.01

26201

26.20

3.9

108.07

7.940

2742.1

201.83

0.2742

0.2687

268.91

26891

26.89

4.0

110.84

8.144

2812.4

207.00

0.2812

0.2756

275.80

27580

27.58

4.1

113.61

8.348

2882.7

212.18

0.2882

0.2825

282.70

28270

28.27

4.2

116.38

8.551

2953.0

217.35

0.2953

0.2894

289.59

28959

28.96

4.3

119.15

8.755

3023.3

222.53

0.3023

0.2963

296.49

29649

29.65

4.4

121.92

8.958

3093.6

227.70

0.3093

0.3032

303.38

30338

30.34

4.5

124.70

9.162

3164.0

232.88

0.3164

0.3101

310.28

31028

31.03

4.6

127.47

9.366

3234.3

238.05

0.3234

0.3169

317.17

31717

31.72

4.7

130.24

9.569

3304.6

243.23

0.3304

0.3238

324.07

32407

32.41

4.8

133.01

9.773

3374.9

248.40

0.3374

0.3307

330.96

33096

33.10

4.9

135.78

9.976

3445.2

253.58

0.3445

0.3376

337.86

33786

33.79

5.0

138.55

10.180

3515.5

258.75

0.3515

0.3445

344.75

34475

34.48

5.1

141.32

10.384

3585.8

263.93

0.3585

0.3514

351.65

35165

35.16

5.2

144.09

10.587

3656.1

269.10

0.3656

0.3583

358.54

35854

35.85

5.3

146.86

10.791

3726.4

274.28

0.3726

0.3652

365.44

36544

36.54

5.4

149.63

10.994

3796.7

279.45

0.3796

0.3721

372.33

37233

37.23

5.5

152.41

11.198

3867.1

284.63

0.3867

0.3790

379.23

37923

37.92

5.6

155.18

11.402

3937.4

289.80

0.3937

0.3858

386.12

38612

38.61

5.7

157.95

11.605

4007.7

294.98

0.4007

0.3927

393.02

39302

39.30

5.8

160.72

11.809

4078.0

300.15

0.4077

0.3996

399.91

39991

39.99

5.9

163.49

12.012

4148.3

305.33

0.4148

0.4065

406.81

40681

40.68

6.0

166.26

12.216

4218.6

310.50

0.4218

0.4134

413.70

41370

41.37

Summary of Contents for Crewsaver Crewfit Twin 275N

Page 1: ...fejacket Date November 2016 Issue No 14 Page of 43 1 SERVICE MANUAL CREWFIT 275N LIFEJACKET Survitec House Lederle Lane Gosport Hants PO13 0FZ England Tel 44 0 1329 820000 Fax 44 0 1329 236218 email c...

Page 2: ...ation Tube on older jackets now included Requirement for Servicing personnel to mark Service Labels with initials and certificate number added to Section 8 1 6 Details of CSL Light added to Section 5...

Page 3: ...ols 2 5 Lifejacket Servicing Record Sheet Section 3 3 1 Unpacking the Lifejacket Section 4 4 1 Cleaning Lifejackets Section 5 5 1 Inspection Section 6 6 1 Testing Section 7 7 1 Repairs Section 8 8 1 A...

Page 4: ...owing training in servicing procedures instructed by Crewsaver approved personnel The manual also details the equipment and parts needed for correct maintenancetobeperformed 1 1 5 Servicingmustbecarri...

Page 5: ...atic Hammar Automatic Manual Firing head Manual Override Oral inflation tube Pressure relief valves Hard wearing cover Whistle fitted Retro reflective tape Lifting Becket fitted Light fitted Spray Hoo...

Page 6: ...ed Retro Reflective Tape 60g CO Cylinder 2 USE ONLY CREWSAVER 60g CO2 Disposable Cylinder FOLD UNDER FOLD UNDER 20mm Velcro Hook 20mm Velcro Loop Oral Tube 40mm Black Polyester Retaining Strips Hammar...

Page 7: ...CO Cylinder 2 USE ONLY CREWSAVER 60g CO2 Disposable Cylinder FOLD UNDER FOLD UNDER 20mm Velcro Hook 20mm Velcro Loop Oral Tube 40mm Black Polyester Retaining Strips Mk5 Firing Head and Capsule 1 4 1 G...

Page 8: ...tioned down the centre of the back The lifejacket will inflate a u t o m a t i c a l l y u p o n immersion in water Pull lanyards down if manual inflation is required Fasten the interlocking front buc...

Page 9: ...front buckle as shown 1 2 3 CREWFIT PERSONS OF 32 KG OR MORE CREWFIT PERSONS OF 32 KG OR MORE The lifejacket will inflate a u t o m a t i c a l l y u p o n immersion in water Pull lanyards down if man...

Page 10: ...The service station shall be of an approved standard 2 1 1 9 Procedures shall be introduced to ensure that service bulletins Manuals and replacement parts are obtained from Crewsaver 2 1 1 10 Subseque...

Page 11: ...r diesel fuel may be sponged off immediately with clean water and allowed to dry naturally 2 3 3 Mud can be removed with a stiff not wire brush when dry 0 2 3 4 The outer cover may be hand washed in g...

Page 12: ...r Servicing Tool Kit A fine screw driver or tool suitable for removing gaskets Hammar inflator body bench clamp Hammar cylinder torque clamp Loctite 222 Adhesive Boning tool Roller Brushes Scissors go...

Page 13: ...VALVES MANIFOLDS Schrader VALVES CYLINDERS LIGHT CYALUME POCKET BUDDY LINE RQ INFLATION MECHANISM COMMENTS OPERATING MECHANISM CORD AUTOMATIC CAPSULE WASHERS RETAINING NUT RETAINING CLIP TOGGLE RQ SP...

Page 14: ...2 6 Lifejacket Servicing Tool Kit Cylinder Torque Strap UML Mk5 Auto Socket Manometer Valve Extraction Tool Pressure Measuring Adaptor Inflation Adaptor Turned Socket Calibrated Socket Driver Tighten...

Page 15: ...c operating head 3 1 2 1 1 Automatic Only Unscrew the Automatic Capsule if fitted from the operating mechanism Place to one side for testing and reassembly later See Section 6 for details 3 1 2 1 2 Ca...

Page 16: ...wsaver Servicing Manual Crewsaver Crewfit 275 Lifejacket Date November 2016 Issue No 14 Page of 43 16 Fig 3 1 Unpacking the Lifejacket 3 Section Fig 3 1 1 Fig 3 1 2 JER K TO INF LAT E Fig 3 1 3 Fig 3...

Page 17: ...ve retaining nut from the top of the firing head using a 9 16 ths socket or spanner Check for corrosion discard if corroded Remove the top sealing gasket washer and discard This must be replaced with...

Page 18: ...aver Mk5i Auto Capsule Sales Code 10012 United Moulders Mk5 Automatic Head Black Fitted to original batches of CSR 150N Seacrewsader and House of Hardy Crewfit Lifejackets The serial numbers are prefi...

Page 19: ...s been changed to differentiate it from the black United Moulders Mk5i Capsule 10017 Sales Code 10012 United Moulders Mk5 Automatic Capsule Black Fitted to original batches of CSR 150N Seacrewsader an...

Page 20: ...60 gram cylinder from the automatic operating head Once the cylinder has been removed inspect the cylinder O Ring seal Check the seal is in place and that it is in a good condition Take the cylinder a...

Page 21: ...d is needed then the jacket must be returned to Crewsaver for a new inflation chamber to be fitted or depending on the general condition of the cover the jacket must be declared as Beyond Economic Rep...

Page 22: ...ate November 2016 Issue No 14 Page of 43 22 Fig 3 6 United Moulders Mk3 Operating Head JACKETS FITTED WITH THE Mk3 OPERATING AS ILLUSTRATED ABOVE SHOULD BE RETURNED TO CREWSAVER WHO WILL DETERMINE WHE...

Page 23: ...r the capsule of these jackets they must be replaced with the new items as shown above Supplies of the Crewsaver Mk5 Head and Capsule will continue to be available for fitting onto older lifejackets T...

Page 24: ...een black locking ring and labelled yellow cap The black locking ring will now turn counter clockwise Fig 3 7 1 Fig 3 7 2 Cap 3a 3b 3 Now turn black locking ring counter clockwise 3a and lift cap 3b c...

Page 25: ...can be removed with clean water and the zip if fitted can be cleaned with a stiff not wire brush when dry 4 1 2 1 Contaminants such as oil or diesel fuel may be sponged off immediately with clean wat...

Page 26: ...nufactured before 1996 5 2 3 Visually inspect all webbings in accordance with Section 5 7 5 2 4 Visually inspect the whistle and its attachment to the lifejacket for mistreatment defects and fraying o...

Page 27: ...n released Remedial Action In the event that the Operating Mechanism fails any of the above inspection procedures the complete unit shall be replaced No Repairs are allowed Refer to Section 9 for the...

Page 28: ...ing Markings 5 9 Lights if fitted 5 9 1 There are many lights available and all have a means of testing the light Each light will have an expiry date printed on the light Below is the example of an L6...

Page 29: ...lens and its mounting or housing 5 9 6 Check expiry date on battery The expiry date must exceed the date of the next annual service If the light has expired or expires before the next service then it...

Page 30: ...a black ring these must be measured All Oral Inflation Tubes will be like this but some later models of lifejacket could be fitted with a Gas Flange that has a clear base These Gas Flanges need not be...

Page 31: ...1447 144 80 14480 14 48 2 2 60 96 4 479 1546 8 113 85 0 1547 0 1516 151 69 15169 15 17 2 3 63 73 4 683 1617 1 119 03 0 1617 0 1585 158 59 15859 15 86 2 4 66 50 4 886 1687 4 124 20 0 1687 0 1654 165 4...

Page 32: ...Test for Crewsaver Mk5 Automatic Operating Heads to be performed when capsules have expired 6 3 2 1 Remove the operating mechanism from the lifejacket and remove the cylinder 6 3 2 2 Assemble the exp...

Page 33: ...f the replacement part refer to Section 9 7 3 2 Please ensure cylinders are disposed of in accordance with local regulations Treat empty cylinders as steel for recycling purposes 7 4 1 No repairs perm...

Page 34: ...art No of the replacement part 7 6 1 No cuts are allowed in the webbing of any of these components No repairs are permitted on Harness Lifejackets Worn broken or cracked stitches are to be over sewn b...

Page 35: ...d be over sewn following the same line of stitching ensuring that the stitching continues for a minimum of 20mm past the repair section each end must be back tacked twice aii Repairs to pull threads s...

Page 36: ...Note Retaining nut must be tightened to between 2 5 and 2 7 Nm Warning Care must be taken not to cross thread the connection 8 1 3 3 For Hammar Hydrostatic and Manual Operating Mechanisms See Fig 8 4...

Page 37: ...that the Schrader valve is fitted If fitting a new schrader valve use a calibrated torque driver set to 0 32 0 36 Nm Then place the operating head onto the manifold so that the cylinder threaded openi...

Page 38: ...colour The capsule should be screwed tight to the end Make a note of the batch number and manufacture date on to the service record sheet If the lifejacket is fitted with a United Moulders Mk5 head a...

Page 39: ...driver set to 0 32 0 36 Nm Then place the operating head onto the manifold so that the cylinder is pointing upwards Fig 8 3 5 Fig 8 3 6 Check the O ring seal is in the recess on the top face of the o...

Page 40: ...o both these questions then proceed as follows If NO get a new cap Fig 8 4 3 Hold the gas cylinder through the fabric of the lifejacket Fig 8 4 4 Position the replacement cap with the water inlet valv...

Page 41: ...er at the dotted lines shown Fold down the collar flap C and line up the velcro and fasten Locate lifting becket D and fold this up on top of the inflator Fold lapels E and F across the front of the i...

Page 42: ...et is now repacked A B E F D C JER K TO INF LAT E K L G H I J Fig 8 6 1 Fig 8 6 2 Fig 8 6 3 Fig 8 6 4 Fig 8 6 Crewfit 275 ZippedPacking Instructions 8 Section Lay Lifejacket out flat as shown in Diagr...

Page 43: ...aining Clip 11043 UM Mk5 Auto Head Cutter O Ring 11048 Hammar Automatic Cap 11014 Hammar Back Plate 11013 Whistle 10677 L6 Light 10219 Crutch Straps pair 10032 Mouth Inflation Valve 10208 Mouth Inflat...

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