Ventrac 4520P - Hydraulic Hoses

Installing the Hydraulic Hoses and Tubes (O-Ring
Face Seal) (continued)
Hose/Tube Installation Torque Table
Fitting Dash Size Hose/Tube Side Thread
Size
(inch)—threads per inch)
Installation Torque
4 9/16—8 25 to 29 N∙m (18 to 22 ft-lb)
6 11/16—16 37 to 44 N∙m (27 to 33 ft-lb)
8 13/16—16 51 to 63 N∙m (37 to 47 ft-lb)
10 1—14 82 to 100 N∙m (60 to 74 ft-lb)
12 1–3/16—12 116 to 142 N∙m (85 to 105 ft-
lb)
16 1–7/16—12 150 to 184 N∙m (110 to 136
ft-lb)
20 1–11/16—12 190 to 233 N∙m (140 to 172
ft-lb)
Flats From Wrench Resistance Table
Size FFWR
4 (1/4 inch nominal hose or tubing) 1/2 to 3/4
6 (3/8 inch) 1/2 to 3/4
8 (1/2 inch) 1/2 to 3/4
10 (5/8 inch) 1/2 to 3/4
12 (3/4 inch) 1/3 to 1/2
16 (1 inch) 1/3 to 1/2
5. If a torque wrench is not available or if space at the swivel nut prevents the use of
a torque wrench, use the alternative procedure Flats From Wrench Resistance
(FFWR).
A. Use a wrench to tighten the swivel nut onto the fitting until you feel light
resistance with the wrench—approximately 3.39 N∙m (30 in-lb).
B. Put a mark on the swivel nut and body of the fitting (item 1 Figure 23). If
connecting a hose, hold the hose in alignment with a wrench to prevent the
hose from turning.
C. Use a wrench to tighten the nut to the correct Flats From Wrench Resistance
(compare items 2 and 3 in Figure 23).
4520P Page 5–11 Hydraulic System: Hydraulic Hoses
09.40003Rev 00