John Deere 318 - Manual (Page 34)

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
10
15
8