User Manual

SERVICE RECOMMENDATIONS FOR FLAT

FACE O-RING SEAL FITTINGS

1. Inspect the fitting sealing surfaces. They must be free

of dirt or defects.

2. Inspect the O-ring. It must be free of damage or

defects.

3. Lubricate O-rings and install into groove using

petroleum jelly to hold in place.

4. Push O-ring into the groove with plenty of petroleum

jelly so O-ring is not displaced during assembly.

5. Index angle fittings and tighten by hand pressing joint

together to insure O-ring remains in place.

6. Tighten fitting or nut to torque valve shown on the

chart per dash size stamped on the fitting. Do not allow

hoses to twist when tightening fittings.

FLAT FACE O-RING SEAL FITTING TORQUE

Nominal Thread Swivel Nut Bulkhead

Tube O.D. Dash Size Torque Nut Torque

mm (in.) Size In. N·m (lb-ft) N·m (lb-ft)

6.35 0.250 -4 9/16-18 16 12 5.0 3.5

9.52 0.375 -6 11/16-16 24 18 9.0 6.5

12.70 0.500 -8 13/16-16 50 37 17.0 12.5

15.88 0.625 -10 1-14 69 51 17.0 12.5

19.05 0.750 -12 1 3/16-12 102 75 17.0 12.5

22.22 0.875 -14 1 3/16-12 102 75 17.0 12.5

25.40 1.000 -16 1 7/16-12 142 105 17.0 12.5

31.75 1.250 -20 1 11/16-12 190 140 17.0 12.5

38.10 1.500 -24 2-12 217 160 17.0 12.5

NOTE: Torque tolerance is +15 -20%.

T6243AD -UN-18OCT88

OR,SEAL,FIT -19-03MAR89

Repair Specifications/Service Recommendations

TM1590 (17MAY95) 10-15-8 316, 318 & 420 Lawn and Garden Tractors

020895