ENGINE
B2050, B2350, B2650, B3150, WSM
1-S13
3. TIGHTENING TORQUES
Tightening torque of screws, bolts and nuts on the table below are specially specified. (For general use screws,
bolts and nuts: See page G-10.)
• In removing and applying the bolts and nuts marked with "*", a pneumatic wrench or similar pneumatic
tool, if employed, must be used with enough care not to get them seized.
• For "*" marked screws, bolts and nuts on the table, apply engine oil to their threads and seats before
tightening.
• The letter "M" in Size × 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.
9Y1210982ENS0003US0
[1] TRACTOR SECTION
9Y1210982ENS0004US0
[2] ENGINE SECTION
9Y1210982ENS0005US0
Item N·m kgf·m lbf·ft
Power steering hose 2 24 to 28 2.5 to 2.8 18 to 20
Steering wheel mounting nut 20 to 40 2.1 to 4.0 15 to 29
Engine mounting screw 59 to 69 6.1 to 7.0 44 to 50
Item Size × Pitch N·m kgf·m lbf·ft
Oil pressure switch – 15 to 19 1.5 to 2.0 11 to 14
Nozzle holder – 35 to 39 3.5 to 4.0 26 to 28
Overflow pipe nut – 35 to 39 3.5 to 4.0 26 to 28
Nozzle holder assembly – 49 to 68 5.0 to 7.0 36 to 50
*Cylinder head cover nuts
[D1105, V1505]
M7 × 1.0 7 to 8 0.7 to 0.9 5 to 6
*Cylinder head cover nuts [D1305] M7 × 1.0 9.81 to 11.2 1.00 to 1.15 7.24 to 8.31
Injection pipe retaining nuts M12 × 1.5 25 to 34 2.5 to 3.5 18 to 25
*Rocker arm bracket nuts M7 × 1.0 22 to 26 2.2 to 2.7 16 to 19
*Cylinder head screw M10 × 1.25 64 to 68 6.5 to 7.0 47 to 50
*Fan drive pulley screw M14 × 1.5 236 to 245 24.0 to 25.0 174 to 180
Idle gear 2 lock nut – 25 to 29 2.5 to 3.0 18 to 21
Idle gear 2 bearing nut – 35 to 39 3.5 to 4.0 26 to 28
*Connecting rod screw M8 × 1.0 42 to 46 4.2 to 4.7 31 to 33
*Flywheel screw M10 × 1.25 53.9 to 58.8 5.5 to 6.0 39.8 to 43.4
*Bearing case cover screws M6 × 1.0 9.81 to 11.2 1.00 to 1.15 7.24 to 8.31
*Main bearing case screw 2 M9 × 1.25 49 to 53 5.0 to 5.5 37 to 39
*Main bearing case screw 1 M8 × 1.25 30 to 34 3.0 to 3.5 22 to 25
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