Engine Body; Hollow Core; Piston - Kubota D1503-M-DI Workshop Manual

03-M-DI Series, WSM

1. ENGINE BODY

[1] HOLLOW CORE

[2] PISTON

The cylinder block has a hollow core (1) already cast
inside the cylinder-to-cylinder water jacket.
In this core, there is a pair of vertical cooling
passages (right and left) as well as multiple horizontal
cooling channels that interconnect these cooling
passages. This design allows smoother cooling water
flow through the cylinder block, which cools down a wider
range between the cylinders more effectively.
(1) Hollow Core
Piston's skirt
disulfide , which reduces the piston slap noise and
thus the entire operating noise.
Molybdenum disulfide (MoS
The molybdenum disulfide (1) serves as a solid
lubricant, like a Graphite or Teflon. This material helps
resist metal wears even with little lube oil.
(1) Molybdenum Disulfide
M-1
DIESEL ENGINE
is coated with molybdenum
)
2
KiSC issued 10, 2009 A
W1013048
W1013114