Kubota DF972-E2 - TIGHTENING TORQUES

S-12
WG972-E2, DF972-E2, WSM
GASOLINE / LPG ENGINE
3. TIGHTENING TORQUES
Screws, bolts and nuts must be tightened to the specified torque using a torque wrench, several screws, bolts and
nuts such as those used on the cylinder head must be tightened in proper sequence and the proper torque.
[1] TIGHTENING TORQUES FOR SPECIAL USE SCREWS, BOLTS AND
NUTS
NOTE
■
•For “*” marked screws, bolts and nuts on the table, apply engine oil to their threads and seats before
tightening.
•The letter “M” in Size x Pitch means that the screw, bolt or nut dimension stands for metric. The size is
the nominal outside diameter in mm of the threads. The pitch is the nominal distance in mm between two
threads.
W1013236
Item Size x Pitch N·m kgf·m ft-lbs
*Cylinder head cover screw M6 x 1 6.9 to 11.3 0.7 to 1.15 5.1 to 8.3
*Rocker arm bracket screw M6 x 1 9.8 to 11.3 1.00 to 1.15 72.3 to 83.2
*Cylinder head screw M8 x 1.25 37.3 to 42.2 3.8 to 4.3 27.5 to 31.1
*Fan drive pulley screw M12 x 1.5 98.1 to 107.9 10.0 to 11.0 72.3 to 79.6
*Idle gear mounting screw M6 x 1 9.8 to 11.3 1.00 to 1.15 7.2 to 8.3
*Connecting rod screw M7 x 0.75 26.5 to 30.4 2.7 to 3.1 19.5 to 22.4
*Flywheel screw M10 x 1.25 53.9 to 58.8 5.5 to 6.0 39.8 to 43.4
Bearing case cover mounting screw M6 x 1 9.8 to 11.3 1.00 to 1.15 7.23 to 8.32
*Main bearing case screw 2 M7 x 1 26.5 to 30.4 2.7 to 3.1 19.5 to 22.4
*Main bearing case screw 1 M6 x 1 12.7 to 15.7 1.3 to 1.6 9.4 to 11.6
Oil pressure switch PT 1/8 14.7 to 19.6 1.5 to 2.0 10.8 to 14.5
Starter (C terminal nut) – 5.9 to 11.8 0.6 to 1.2 4.3 to 8.7
Spark plug M14 x 1.25 19.6 to 24.5 2.0 to 2.5 14.5 to 18.1
Drain plug M12 x 1.25 32.4 to 37.3 3.3 to 3.8 23.9 to 27.5
Carburetor mounting nut M8 x 1.0 23.5 to 27.5 2.4 to 2.8 17.4 to 20.2
Joint for LPG hose of vaporizer
(local arrangement)
PT - 1/4 19.6 to 32.9 2.0 to 4.0 14.5 to 28.9
Joint for vapor hose of vaporizer PT - 3/8 29.4 to 58.8 3.0 to 6.0 21.7 to 43.4
Joint for water hose of vaporizer PT - 3/8 29.4 to 58.8 3.0 to 6.0 21.7 to 43.4
Actuator mounting screw M5 x 0.8 4.9 to 0.8 0.45 to 0.55 3.6 to 4.0
Actuator flange screw M6 x 1.0 9.8 to 11.3 1.00 to 1.15 7.23 to 8.32
Governor lever nut M6 x 1.0 9.8 to 11.3 1.00 to 1.15 7.23 to 8.32
KiSC issued 01, 2006 A