Tapered Pipe Thread Fittings - MacDon M155 Unloading And Assembly Instructions

Table 7.13 O-Ring Face Seal (ORFS) Hydraulic Fittings (continued)
SAE Dash Size
-16
-20
-24
-32

7.1.8 Tapered Pipe Thread Fittings

Assemble pipe fittings as follows:
1. Check components to ensure that fitting and port threads are free of burrs, nicks, scratches, or any form of
contamination.
2. Apply pipe thread sealant (paste type) to external pipe threads.
3. Thread fitting into port until hand-tight.
4. Torque connector to appropriate torque angle. The turns from finger tight (TFFT) and flats from finger tight (FFFT)
values are shown in Table
90 degree) is aligned to receive incoming tube or hose assembly. Always finish alignment of fitting in tightening
direction. Never back off (loosen) pipe threaded connectors to achieve alignment.
5. Clean all residue and any excess thread conditioner with appropriate cleaner.
6. Assess final condition of fitting. Pay special attention to possibility of cracks to port opening.
7. Mark final position of fitting. If a fitting leaks, disassemble fitting and check for damage.
NOTE:
Overtorque failure of fittings may not be evident until fittings are disassembled.
Table 7.14 Hydraulic Fitting Pipe Thread
Tapered Pipe Thread Size
1/8–27
1/4–18
3/8–18
1/2–14
3/4–14
1–11 1/2
1 1/4–11 1/2
1 1/2–11 1/2
2–11 1/2
17. Torque values and angles shown are based on lubricated connection as in reassembly.
215015
Thread Size (in.) Tube O.D. (in.)
1 7/16
1 11/16
1–2
2 1/2
7.14, page 235. Make sure that tube end of a shaped connector (typically 45 degree or
Recommended TFFT
REFERENCE
1
1 1/4
1 1/2
2
2–3
2–3
2–3
2–3
1.5–2.5
1.5–2.5
1.5–2.5
1.5–2.5
1.5–2.5
235
Torque Value 17
Nm
150–165 111–122
205–226 151–167
315–347 232–256
510–561 376–414
Recommended FFFT
12–18
12–18
12–18
12–18
12–18
9–15
9–15
9–15
9–15
lbf·ft
Revision A