User Manual

TUBE AND HOSE FITTING, 37˚ FLARE AND 30˚ CONE SEAT CONNECTOR TORQUE

Thread Torque

New

Used

Size N·m (lb-ft) Number of Flats Number of Flats

3/8-24 UNF 8 (6) 2-1/2 1

7/16-20 UNF 12 (9) 2-1/2 1

1/2-20 UNF 16 (12) 2-1/2 1

9/16-18 UNF 24 (18) 2 1

3/4-16 UNF 46 (34) 2 1

7/8-14 UNF 62 (46) 1-1/2 1

1-1/16-12 UN 102 (75) 1 3/4

1-3/16-12 UN 122 (90) 1 3/4

1-5/16-12 UN 142 (105) 3/4 3/4

1-5/8-12 UN 190 (140) 3/4 3/4

1-7/8-12 UN 217 (160) 1/2 1/2

1. Tolerance of ± 10 percent.

2. To be used if a torque wrench cannot be used. After tightening fitting by hand, put a mark across the

fittings, then tighten fitting the number of flats shown.

3. Flare connection seal by deforming or squeezing the tube between the nut and the connector. More

deformation is possible with new parts than with old. Therefore, if a torque

rench is not used for re-assembly, the values in this column must be used to

revent damage.

MX,15901015,5 -19-17JAN95

Repair Specifications/Service Recommendations

TM1590 (17MAY95) 10-15-10 316, 318 & 420 Lawn and Garden Tractors

020895