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Hydraulic Fitting Installation (SAE Straight Thread
Non--Adjustable Fitting (Fig. 6)
1.Make sure all threads and sealing surfaces of fitting and component port are free of burrs, nicks, scratches or any foreign material.
2.As a preventative measure against leakage, it is rec- ommended that the
3.Lightly lubricate the
IMPORTANT: Before installing fitting into port, de- termine port material. If fitting is to be installed into an aluminum port, installation torque is reduced.
4.Install the fitting into the port. Then, use a torque wrench and socket to tighten the fitting to the recom- mended installation torque shown in Figure 7.
NOTE: Use of an offset wrench (e.g. crowfoot wrench) will affect torque wrench calibration due to the effective length change of the torque wrench. Tightening torque when using a torque wrench with an offset wrench will be less than the recommended installation torque. See Using a Torque Wrench with an Offset Wrench in the Torque Specifications section of Chapter 2
5.If a torque wrench is not available, or if space at the port prevents use of a torque wrench, an alternate meth- od of assembly is the Flats From Finger Tight (F.F.F.T.) method.
A.Install the fitting into the port and tighten it down full length until finger tight.
B.If port material is steel, tighten the fitting to the listed F.F.F.T. If port material is aluminum, tighten fit- ting to 60% of listed F.F.F.T.
Size | F.F.F.T. | ||
4 | (1/4 in. nominal hose or tubing) | 1.00 + 0.25 | |
6 | (3/8 in.) | 1.50 + 0.25 | |
8 | (1/2 in.) | 1.50 + 0.25 | |
10 | (5/8 in.) | 1.50 + 0.25 | |
12 | (3/4 in.) | 1.50 + 0.25 | |
16 | (1 in.) | 1.50 + 0.25 |
Fitting
Figure 6
Fitting | Fitting Port Side | Installation Torque Into |
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Dash Size | Thread Size | Steel Port |
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4 | 7/16 | 20 | 15 to 19 ft | m) | 9 to 11 | |||||
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5 | 1/2 | 20 | 18 to 22 ft | m) | 11 to 15 | lb (15 to 20 | m) | |||
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6 | 9/16 | 18 | 34 to 42 ft | m) | 20 to 26 | lb (28 to 35 | m) | |||
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8 | 3/4 | 16 | 58 to 72 ft | m) | 35 to 43 | lb (48 to 58 | m) | |||
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10 | 7/8 | 14 | 99 to 121 | lb (135 to 164 | m) | 60 to 74 | lb (82 to 100 | |||
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12 | 1 1/16 | 12 | 134 to 164 ft | m) | 81 to 99 | lb (110 to 134 N | ||||
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14 | 1 3/16 | 12 | 160 to 196 ft | m) | 96 to 118 | lb (131 to 160 | m) | |||
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16 | 1 5/16 | 12 | 202 to 248 ft | m) | 121 to 149 | lb (165 to 202 | m) | |||
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20 | 1 5/8 | 12 | 247 to 303 ft | m) | 149 to 183 | lb (202 to 248 | m) | |||
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| Figure 7 |
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Hydraulic System | Page 4 | Groundsmaster |