Kubota DF972-E2, Руководство по ремонту, Страница: 108 / 138

S-38
WG972-E2, DF972-E2, WSM GASOLINE / LPG ENGINE
Rocker Arm and Push Rod
1. Remove the rocker arm bracket screws (1).
2. Detach the rocker arm assembly (2).
3. Remove the push rods (3).
(When reassembling)
• When putting the push rods (3) onto the tappets (4), check to see
if their ends are properly engaged with the dimples.
IMPORTANT ■
• After installing the rocker arm, be sure to adjust the valve
clearance.
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Cylinder Head
1. Loosen the pipe clamps (1), and remove the water return hose
(2).
2. Remove the cylinder head screw in the order of ( n ) to ( a ).
3. Lift up the cylinder head to detach.
4. Remove the cylinder head gasket.
(When reassembling)
• Replace the cylinder head gasket with a new one.
• Tighten the cylinder head screws after applying sufficient oil.
• Tighten the cylinder head screws in order of (
a ) to ( n ).
• Tighten them uniformly, or the head may deform in the long run.
W1025645
Tappets
1. Remove the tappets (1) from the crankcase.
(When reassembling)
• Visually check the contact between tappets and cams for proper
rotation. If defect is found, replace tappets.
• Before installing the tappets, apply engine oil thinly around them.
IMPORTANT ■
• Do not change the combination of tappet and tappet guide.
W10209700
Tightening torque Rocker arm bracket screw
9.8 to 11.3 N·m
1.00 to 1.15 kgf·m
7.2 to 8.3 ft-lbs
(1) Rocker Arm Bracket screws
(2) Rocker Arm Assembly (3) Push Rod
(4) Tappet
Tightening torque Cylinder head screw
37.3 to 42.2 N·m
3.8 to 4.3 kgf·m
27.5 to 31.1 ft-lbs
(1) Hose Clamp
(2) Water Return Hose A : Gear Case Side
(n) to (a) : To Loosen
(a) to (n) : To Tighten
(1) Tappet
KiSC issued 01, 2006 A