Kubota K008-3 Workshop Manual page 135

(3)Main bearing case assembly - Type 1
* The main bearing case and thrust bearing are divided.
(4)Main bearing case assembly - Type 2
* The main bearing case which adheres thrust bearing function.
* This bearing is adopted for the OEM engines
(Z482/D662/D722/D782)
Tightening torque of main bearing case bolt-1
12.7 to 15.7 N·m/1.3 to 1.6 kg·m
Crankshaft side clearance
Factory specification:0.15 to 0.31 mm/0.006 to 0.012 in
A/Limit: 0.5 mm/0.02 in
An oversize thrust bearing is adopted.
Main bearing case assembly
Thrust bearing
Main bearing
Main bearing case bolt-1(Special bolt)
* This bearing is adopted for the engines
(Z482/D662/D722) of the KBT product.
Tightening torque of main bearing case bolt-1
23.6 to 27.4 N·m/2.4 to 2.8 kg·m
Crankshaft side clearance
Factory specification:0.15 to 0.25 mm/0.006 to 0.01 in
A/Limit: 0.5 mm/0.02 in
An oversize thrust bearing is not adopted.
Main bearing case
Main bearing
Dowel pin
Main bearing case bolt-1(Flanged bolt)
III-S-7
Courtesy of Machine.Market