AH-21 - HYDRAULIC CYLINDER, 3-1/2 X 8, DOUBLE ACTING
TABLE OF CONTENTS
DIAGRAM
PART LIST
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Part #
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Description
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  • 1
    CYLINDER; ASSY, hydraulic
  • 1
    1
    BACK-UP RING; o-ring back-up
  • 2
    2
    CLIP; PIN, quick attachable cot.
  • 3
    2
    PIN; ASSY, cyl pivot
  • 4
    2
    BACK-UP RING; WASHER, o-ring back-up
  • 5
    4
    ROD 5/8'' - 11 x 14''; tie
  • 6
    1
    HEAD; rear
  • 7
    2
    O-RING 3.234'' ID x 0.139'' Width; 3-1/4 x 3-1/2 x 1/8 front & rear head
  • 9
    2
    BACK-UP RING 0.594'' ID x 0.36'' Width; o-ring back-up
  • 10
    1
    O-RING 0.139'' Thk x 0.984'' ID, -214, Cl 6, 90 Duro; 1 x 1-1/4 x 1/8 piston rod
  • 11
    1
    TUBE; cyl return
  • 1
    LOCK WASHER 3/8''; WASHER, LOCK, 3/8''
  • 12
    2
    BACK-UP RING; WASHER, o-ring back-up
  • 13
    1
    O-RING 0.21'' Thk x 3.1'' ID, -338, Cl 6, 90 Duro; 3-1/8 x 3-1/2 x 1/8 piston
  • 14
    1
    NUT; 1-1/8-12 hex. lock
  • 15
    1
    PISTON; 
  • 17
    1
    LOCK VALVE; VALVE ASSY, limit stop
  • 18
    1
    O-RING 0.103'' Thk x 0.612'' ID, -114, Cl 6, 90 Duro; 5/8 x 13/16 x 3/32 limit stop valve housing
  • 19
    1
    O-RING 0.07'' Thk x 0.176'' ID, -8, Cl 6, 90 Duro; 3/16 x 5/16 x 1/16 limit stop valve housing
  • 20
    1
    HOUSING; ASSY, limit stop valve
  • 21
    1
    PLATE; limit stop valve retainer
  • 2
    BOLT Hex, 1/4'' - 20 x 9/16''; SCREW, 1/4-20 x 9/16 hex-hd cap
  • 22
    1
    RING; quad
  • 23
    1
    WASHER; WIPER, piston rod
  • 24
    1
    SEALING WASHER; RETAINER, piston rod wiper
  • 25
    1
    BACK-UP RING; limit stop valve housing o-ring back-up
  • 26
    1
    CLAMP; ASSY, stroke limit
  • 1
    BOLT Hex, 5/16'' - 24 x 3/4'', Gr 5; SCREW, 5/16-24 x 3/4 C-Z hex-hd cap
  • 27
    1
    RETAINER; limit stop valve o-ring
  • 28
    1
    ROD; ASSY, piston
  • 29
    2
    O-RING 0.103'' Thk x 0.549'' ID, -113, Cl 6, 90 Duro; 9/16 x 3/4 x 3/32 return tube
  • 30
    2
    O-RING 0.097'' Thk x 0.755'' ID, -910, Cl 6, 90 Duro; 5/8 OD tube
  • 31
    2
    PLUG; 7/8-14 str thd o-ring boss
  • 32
    2
    BACK-UP RING; WASHER, quad ring back-up
  • 33
    2
    PLUG; front head
  • 34
    2
    O-RING 0.078'' Thk x 0.468'' ID, -906, Cl 6, 90 Duro; 6-1, 90 Duro, .468'' ID x .078'' Thk, 3/8 OD tube
  • 1
    KIT; PACKAGE, o-ring service;Consists of, (1) o-ring 21590R1, (1) o-ring 364839R1, (1) ring 400744R1, (2) o-ring 343940R1, (2) washer 371218R2, (2) washer 375936R1, (2) o-ring 377952R1, (1) o-ring 378827R1, (1) o-ring 380794R1, (1) wiper 383770R1, (2) washer 403622R1, (2) washer 404015R1, (1) washer 404026R1, (1) washer 404028R1, (1) o-ring 606271C1
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Ref.

Qty

1

Availability

Part #

403842R94

Description

CYLINDER; ASSY, hydraulic

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Alts

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Ref.

1

Qty

1

Availability

Part #

404026R1

Description

BACK-UP RING; o-ring back-up

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Alts

Select

Ref.

2

Qty

2

Availability

Part #

520175R1

Description

CLIP; PIN, quick attachable cot.

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Alts

Select

Ref.

3

Qty

2

Availability

Part #

388695R31

Description

PIN; ASSY, cyl pivot

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Alts

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Ref.

4

Qty

2

Availability

Part #

404015R1

Description

BACK-UP RING; WASHER, o-ring back-up

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Alts

Select

Ref.

5

Qty

4

Availability

Part #

404022R1

Description

ROD 5/8'' - 11 x 14''; tie

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Alts

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Ref.

6

Qty

1

Availability

Part #

404020R1

Description

HEAD; rear

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Alts

Select

Ref.

7

Qty

2

Availability

Part #

343940R1

Description

O-RING 3.234'' ID x 0.139'' Width; 3-1/4 x 3-1/2 x 1/8 front & rear head

Img

Alts

Select

Ref.

9

Qty

2

Availability

Part #

371218R2

Description

BACK-UP RING 0.594'' ID x 0.36'' Width; o-ring back-up

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Alts

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Ref.

10

Qty

1

Availability

Part #

380794R1

Description

O-RING 0.139'' Thk x 0.984'' ID, -214, Cl 6, 90 Duro; 1 x 1-1/4 x 1/8 piston rod

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Alts

Select

Ref.

11

Qty

1

Availability

Part #

404023R1

Description

TUBE; cyl return

Img

Alts

Select

Ref.

Qty

1

Availability

Part #

103321

Description

LOCK WASHER 3/8''; WASHER, LOCK, 3/8''

Img

Alts

Select

Ref.

12

Qty

2

Availability

Part #

375936R1

Description

BACK-UP RING; WASHER, o-ring back-up

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Alts

Select

Ref.

13

Qty

1

Availability

Part #

378827R1

Description

O-RING 0.21'' Thk x 3.1'' ID, -338, Cl 6, 90 Duro; 3-1/8 x 3-1/2 x 1/8 piston

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Alts

Select

Ref.

14

Qty

1

Availability

Part #

20251R1

Description

NUT; 1-1/8-12 hex. lock

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Alts

Select

Ref.

15

Qty

1

Availability

Part #

404019R1

Description

PISTON; 

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Alts

Select

Ref.

17

Qty

1

Availability

Part #

404029R1

Description

LOCK VALVE; VALVE ASSY, limit stop

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Alts

Select

Ref.

18

Qty

1

Availability

Part #

606271C1

Description

O-RING 0.103'' Thk x 0.612'' ID, -114, Cl 6, 90 Duro; 5/8 x 13/16 x 3/32 limit stop valve housing

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Alts

Select

Ref.

19

Qty

1

Availability

Part #

21590R1

Description

O-RING 0.07'' Thk x 0.176'' ID, -8, Cl 6, 90 Duro; 3/16 x 5/16 x 1/16 limit stop valve housing

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Alts

Select

Ref.

20

Qty

1

Availability

Part #

404024R91

Description

HOUSING; ASSY, limit stop valve

Img

Alts

Select

Ref.

21

Qty

1

Availability

Part #

361009R1

Description

PLATE; limit stop valve retainer

Img

Alts

Select

Ref.

Qty

2

Availability

Part #

179792

Description

BOLT Hex, 1/4'' - 20 x 9/16''; SCREW, 1/4-20 x 9/16 hex-hd cap

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Alts

Select

Ref.

22

Qty

1

Availability

Part #

400744R1

Description

RING; quad

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Alts

Select

Ref.

23

Qty

1

Availability

Part #

383770R1

Description

WASHER; WIPER, piston rod

Img

Alts

Select

Ref.

24

Qty

1

Availability

Part #

383771R1

Description

SEALING WASHER; RETAINER, piston rod wiper

Img

Alts

Select

Ref.

25

Qty

1

Availability

Part #

404028R1

Description

BACK-UP RING; limit stop valve housing o-ring back-up

Img

Alts

Select

Ref.

26

Qty

1

Availability

Part #

404034R1

Description

CLAMP; ASSY, stroke limit

Img

Alts

Select

Ref.

Qty

1

Availability

Part #

181595

Description

BOLT Hex, 5/16'' - 24 x 3/4'', Gr 5; SCREW, 5/16-24 x 3/4 C-Z hex-hd cap

Img

Alts

Select

Ref.

27

Qty

1

Availability

Part #

404027R1

Description

RETAINER; limit stop valve o-ring

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Alts

Select

Ref.

28

Qty

1

Availability

Part #

404016R1

Description

ROD; ASSY, piston

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Alts

Select

Ref.

29

Qty

2

Availability

Part #

377952R1

Description

O-RING 0.103'' Thk x 0.549'' ID, -113, Cl 6, 90 Duro; 9/16 x 3/4 x 3/32 return tube

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Alts

Select

Ref.

30

Qty

2

Availability

Part #

364885R1

Description

O-RING 0.097'' Thk x 0.755'' ID, -910, Cl 6, 90 Duro; 5/8 OD tube

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Alts

Select

Ref.

31

Qty

2

Availability

Part #

9410360

Description

PLUG; 7/8-14 str thd o-ring boss

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Alts

Select

Ref.

32

Qty

2

Availability

Part #

403622R1

Description

BACK-UP RING; WASHER, quad ring back-up

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Alts

Select

Ref.

33

Qty

2

Availability

Part #

404033R1

Description

PLUG; front head

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Alts

Select

Ref.

34

Qty

2

Availability

Part #

364839R1

Description

O-RING 0.078'' Thk x 0.468'' ID, -906, Cl 6, 90 Duro; 6-1, 90 Duro, .468'' ID x .078'' Thk, 3/8 OD tube

Img

Alts

Select

Ref.

Qty

1

Availability

Part #

527324R92

Description

KIT; PACKAGE, o-ring service;Consists of, (1) o-ring 21590R1, (1) o-ring 364839R1, (1) ring 400744R1, (2) o-ring 343940R1, (2) washer 371218R2, (2) washer 375936R1, (2) o-ring 377952R1, (1) o-ring 378827R1, (1) o-ring 380794R1, (1) wiper 383770R1, (2) washer 403622R1, (2) washer 404015R1, (1) washer 404026R1, (1) washer 404028R1, (1) o-ring 606271C1

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Alts