MacDon D60 Draper Headers User Manual

Page 76

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SECTION 8. MAINTENANCE AND SERVICING

Form 169441

74

Revision B

8.3.1.3

Flare Type Hydraulic Fittings

a. Check flare and flare seat for defects that might

cause leakage.

b. Align tube with fitting before tightening.

c. Lubricate connection, and hand-tighten swivel nut

until snug.

d. To prevent twisting the tube(s), use two

wrenches. Place one wrench on the connector
body, and with the second, tighten the swivel nut
to the torque shown.

SAE

NO.

TUBE

SIZE

O.D.

(in.)

THD

SIZE

(in.)

NUT

SIZE

ACROSS

FLATS

(in.)

TORQUE

VALUE*

RECOMMENDED

TURNS TO

TIGHTEN

(AFTER FINGER

TIGHTENING)

ft·lbf N·m Flats Turns

3 3/16 3/8

7/16 6 8 1 1/6

4 1/4 7/16

9/16 9

12 1 1/6

5 5/16 1/2

5/8 12

16 1 1/6

6 3/8 9/16

11/16 18 24 1

1/6

8 1/2 3/4

7/8 34

46 1 1/6

10 5/8 7/8

1 46

62

1 1/6

12 3/4

1-1/16

1-1/4 75

102 3/4 1/8

14 7/8

1-3/16

1-3/8 90

122 3/4 1/8

16 1

1-5/16

1-1/2 105

142 3/4 1/8

* The torque values shown are based on lubricated connections,

as in re-assembly.

8.3.1.4

O-ring Type Hydraulic Fittings

a. Inspect O-ring and seat for dirt or obvious

defects.

b. On angle fittings, back off the lock nut until

washer (A) bottoms out at top of groove (B) in
fitting.

c. Hand-tighten

fitting

until

back-up washer (A), or

washer face (if straight fitting), bottoms on part
face (C), and O-ring is seated.

d. Position angle fittings by unscrewing no more

than one turn.

e. Tighten straight fittings to torque shown.

f. Tighten angle fittings to torque shown in the

following table, while holding body of fitting with a
wrench.

SAE

NO.

THD

SIZE

(in.)

NUT SIZE

ACROSS

FLATS

(in.)

TORQUE

VALUE*

RECOMMENDED

TURNS TO TIGHTEN

(AFTER FINGER

TIGHTENING)

ft·lbf N·m Flats

Turns

3 3/8 1/2 6 8

3

3/8

4 7/16 9/16 9 12

4

7/16

5 1/2 5/8 12 16 5

1/2

6 9/16 11/16 18 24

6

9/16

8 3/4 7/8 34 46 8

3/4

10 7/8

1

46 62 10

7/8

12 1-1/16

1-1/4

75 102

12

1-1/16

14 1-3/16

1-3/8

90 122

14

1-3/16

16 1-5/16

1-1/2 105 142

16

1-5/16

20 1-5/8 1-7/8 140 190 20

1-5/8

24 1-7/8 2-1/8 160 217 24

1-7/8

* The torque values shown are based on lubricated connections, as

in re-assembly.

LOCKNUT

SEAT

WASHER

O-RING

GROOVE

FITTING

FLARE

FLARESEAT

BODY

NUT

A

B

C

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