John Deere 318 - Manual (Page 33)

SERVICE RECOMMENDATIONS FOR O-RING
BOSS FITTINGS
STRAIGHT FITTING
1. Inspect O-ring boss seat for dirt or defects.
2. Lubricate O-ring with petroleum jelly. Place electrical
tape over threads to protect O-ring. Slide O-ring over
tape and into O-ring groove of fitting. Remove tape.
3. Tighten fitting to torque value shown on chart.
ANGLE FITTING
1. Back-off lock nut (A) and back-up washer (B)
completely to head-end (C) of fitting.
2. Turn fitting into threaded boss until back-up washer
contacts face of boss.
3. Turn fitting head-end counterclockwise to proper index
(maximum of one turn).
4. Hold fitting head-end with a wrench and tighten
locknut and back-up washer to proper torque value.
NOTE: Do not allow hoses to twist when tightening
fittings.
TORQUE VALUE
Thread Size N·m lb-ft
3/8-24 UNF . . . . . . . . . . . . . . . . 8 . . . . . . . . . . . . . . 6
7/16-20 UNF . . . . . . . . . . . . . . . 12 . . . . . . . . . . . . . . 9
1/2-20 UNF . . . . . . . . . . . . . . . 16 . . . . . . . . . . . . . 12
9/16-18 UNF . . . . . . . . . . . . . . . 24 . . . . . . . . . . . . . 18
3/4-16 UNF . . . . . . . . . . . . . . . 46 . . . . . . . . . . . . . 34
7/8-14 UNF . . . . . . . . . . . . . . . 62 . . . . . . . . . . . . . 46
1-1/16-12 UN . . . . . . . . . . . . . . . 102 . . . . . . . . . . . . . 75
1-3/16-12 UN . . . . . . . . . . . . . . . 122 . . . . . . . . . . . . . 90
1-5/16-12 UN . . . . . . . . . . . . . . . 142 . . . . . . . . . . . . 105
1-5/8-12 UN . . . . . . . . . . . . . . . 190 . . . . . . . . . . . . 140
1-7/8-12 UN . . . . . . . . . . . . . . . 217 . . . . . . . . . . . . 160
NOTE: Torque tolerance is ± 10%.
T6243AE
-UN
-18OCT88
T6520AB
-UN
-18OCT88
04T,90,K66 -19-01AUG94
Repair Specifications/Service Recommendations
TM1590 (17MAY95)
10-15-7
316, 318 & 420 Lawn and Garden Tractors
020895
10
15
7