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close this bookA Training Manual in Conducting a Workshop in the Design, Construction, Operation, Maintenance and Repair of Hydrams (Peace Corps, 1981, 216 p.)
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Attachment 9-A-7

Session 9, Handout 9A-7

Welded Hydram 40' Drive Head


SIZE

1

2

3

4

6

8

1

Accumulator Top Diameter

3

4

5

6

9

12

18

24

1

Accumulator To Thickness

1/2

9/16

9/16

9/16

5/8

11/16

3/4

13/16

2

Accumulator Pipe Diameter

3

4

5

6

9

12

18

24

2

Accumulator Pipe Length

20

20

20

20

21

22

24

26

3

Delivery Socket

1/2

3/4

3/4

1

1 1/2

2

3

4

4

Accumulator Base Ring Thickness

1/2

9/16

9/16

9/16

5/8

11/16

3/4

13/16

4

Accumulator Base Outside Diameter

8

9

10

12

16

18

26

22

6

1½” Check Valve Stroke Limited bolts

1/4

1/4

1/4

1/4

3/8

3/8

3/8

½

7

Check Valve 2" bolt diameter

1/4

1/4

5/16

5/16

3/8

3/8

7/16

7/16

8

Check Valve Backing Plate Thickness

1/16

1/16

1/8

1/8

1/4

5/16

1/2

¾

8

Plate should be larger than hole by:

1/2

3/4

7/8

1 1/8

1 5/8

2 1/8

3 1/4

4 3/8

9

Stroke Limiter Metal strip









10

Stroke Limiter Rubber Strip









11

½ to ½ thick Rubber with Valve same as the #8 backing slate and O.D.=4

12

Check valve washer outside_diam.

½

3/4

3/4

1

1 1/2

2

3

4

13

Check valve nut

¼

1/4

5/16

5/16

3/8

3/8

7/16

7/16

14

Connecting pipe inside Diameter

3/4

1

1 1/4

1 1/2

2

3

4

6

14

Connecting pipe length

11 1/4

12 5/8

14

16 3/4

22 3/8

25 1/4

36 3/8

44 ¾

14

Impulse Valve Bolt

3/8

3/8

3/8

3/8

3/8

1/2

1/2

½

16

Backing Plate Diameter

3 3/4

4 1/8

5

6 5/8

9 7/9

13 1/4

19 7/8

26 1/2

16

Backing Plate Thickness

3/16

1/4

5/16

7/16

5/8

13/16

1 1/4

1 11/16

17

¼ to ½ Thick Rubber w/ valve same as the #1 backing late & 0.D. = 4

18

Impulse Plate O.D. = 4; thickness

1/2

9/16

9/16

9/16

5/8

11/16

3/4

13/16

18

Impulse Plate I.D.

2

2 1/2

3

4

6

8

12

16

19

Impulse Valve Washer Outside Diam.

1 1/2

2

2 1/2

3 1/2

5 1/2

7

11

15

20

Impulse Valve nut

3/8

3/8

3/8

3/8

3/8

1/2

1/2

½

21

Rubber Bumper









22

Lock nut

1/4

1/4

3/8

3/8

3/8

3/8

1/2

½

23

2"x2"x¼" angle iron limiter Bracket









24

Number of impulse Plate Bolts

6

6

6

6

8

14

24

58

24

Diameter of impulse Plate Bolts

9/16

5/8

3/4

7/8

7/8

7/8

1

1

24

Length Impulse Plante Bolts

2

2

3

3 1/2

3 1/2

3 1/2

4

4

25

Stroke limiting adjustment bolt

1/4

1/4

5/16

3/8

3/8

3/8

1/2

½

26

No. of Accumulator Bolts

6

6

6

6

6

8

12

24

26

Diameter of Accumulator Bolts

9/16

5/8

3/4

7/8

7/8

7/8

1

1

26

Length of Accumulator Bolts

2

2

3

3 1/2

3 1/2

3 1/2

4

4

27

Accumulator Base Plate Diameter

8

9

10

12

16

18

26

32

27

Accumulator Base Plate Thickness

1/2

9/16

9/16

9/16

5/8

11/16

3/4

13/16

28

Hydram Base (same as #27)









29

Impulse Valve Cavity Inside Diam.

4

5

6

8

12

14

22

28

29

Impulse Valve Cavity Height

3

3

3 1/2

4

6

8

12

16

30

Socket

1

1 1/4

1 1/2

2

3

4

6

8

31

Impulse Valve Ring Thickness

1/2

9/16

9/16

9/16

5/8

11/16

3/4

13/16

31

Impulse Valve Ring Diameter

8

9

10

12

16

18

26

32

32

1" Support Pipe Length

8

8

8 1/2

9

11

13

17

21

33

4" Diameter Support Base Thickness

1/2

9/16

9/16

9/16

5/8

11/16

3/4

13/16

34

Snifter Bolt

1/4

1/4

1/4

1/4

3/8

3/8

3/8

½