Skytrak 6042 Service Manual User Manual download pdf (Page 20)

100

101

General Information and Specifications

2.6

Model 6042 Legacy Origin 7/02

2.3 TORQUES

2.3.1 Fasteners

All fasteners (nuts, bolts, washers, etc.) are equal to SAE

Grade 5 (PC8.8) and are plated, unless otherwise specified.

2.3.2 Bolts and Nuts

Unless otherwise specified, the following values apply for

Grade 5 (PC8.8) nuts and bolts:

2.3.3 SAE 37° Flare Hydraulic Fittings

a. Assembly Procedure

Follow these steps when tightening hose ends, tube ends

and fitting swivel ends onto fitting male end connections

(Refer to Fig. 2-2).

Improper assembly of this type of joint will result in

leaking joints. Over tightening can result in cracking of the

female swivel seat or deformation of the male fitting

tapered seat. Under tightening will result in the joint

loosening during normal usage. Foreign material on

either seal surfaces will cause damage to one or both

mating parts when the joint is tightened, resulting in a

leaking joint.

1. Inspect both the male and female sealing cone

surfaces for burrs, scratches, dents, other damage,

or foreign material. If any damage is found on the

seat the part is to be rejected as unusable. Clean off

any foreign material from the sealing surfaces before

assembly.

2. Align the mating parts and check to see that the flare

seats properly on the nose of the fitting.

3. Finger tighten the nut onto the fitting. If necessary a

wrench may be used to snug the nut against the

fitting (30 lb-in maximum torque). This is considered

the “finger tight” (Fig. 2-2, 1) condition.

Figure 2-2 F.F.F.T. Tightening Method

Size Torque Size Torque

Inchlb-ftNmmmNmlb-ft

1/4 9 12 6,0 10 7

5/16 17 24 8,0 25 18

3/8 31 42 10,0 50 37

7/16 50 68 -- -- --

1/2 75 102 12,0 80 59

9/16 110 150 14,0 130 95

5/8 150 203 16,0 200 146

3/4 250 340 20,0 360 263

7/8 380 515 22,0 510 372

1.0 585 793 24.0 650 475

MA10,0810

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 543 544

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Skytrak 6042 Service Manual User Manual Page 20

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