SkyTrak 8042 Service Manual - Manual (Page 30)

2.5 Model 8042, 10042, 10054 Legacy Rev. 10/03
General Information and Specifications
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 Flat Face O-Ring Seal Hydraulic
Fittings
a. Assembly Procedure
Improper assembly of this type of joint will result in
leaking joints. 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. The absences of the fitting o-ring will cause
the joint to leak.
1. Inspect both the male (2) and female (3) sealing
surfaces for burrs, scratches, dents, other damage,
or foreign material. If any damage is found on either
surface, the part is to be rejected as unusable. Clean
off any foreign material from the sealing surfaces
before assembly.
2. Inspect the male fitting for the presence of the seal
o-ring (4). Inspect the o-ring for any sign of damage.
If the o-ring is missing or damaged replace it.
3. Apply clean petroleum based oil to the male thread.
4. Place the flat surface of the female connector (2) in
full contact with the o-ring (4) in the male connector.
5. Finger tighten the nut (5) onto the fitting.
6. Complete the joint by tightening the nut to the torque
specified in the table. For hoses and swivel fittings
use a second wrench to keep the female connector
from moving during tightening.
Size Torque Size Torque
Inch lb-ft Nm mm Nm lb-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
O-Ring Boss Fittings To
Flat Face Fittings
SAE Size Torque lb-ft (Nm)
4 19 ± 5 (26 ± 7)
6 35 ± 5 (47 ± 7)
8 52 ± 7 (70 ± 10)
10 83 ± 17 (112 ± 23)
12 120 ± 20 (163 ± 27)
16 165± 35 (224 ± 47)
20 215 ± 65 (292 ± 88)
24 252 ± 77 (342 ± 104)
MA10,0800
2
3
4
5