Lubricating System; General - Kubota EA330-E4 Series Workshop Manual

EA330-E4, WSM

3. LUBRICATING SYSTEM

[1] GENERAL

(1) Rocker Arm
(2) Rocker Arm Bracket
(3) Oil Filler Ring
Lubrication is forced on with a trochoid pump.
Lubrication oil is sucked in by the trochoid pump (7) via an oil strainer (8) mounted on the side of the gear case.
The pressure of lubricating oil discharged from the trochoid pump is regulated by a relief valve (6) to 200 to 390 kPa
2
(2.0 to 4.0 kgf/cm , 29 to 56 psi) (at the rated revolution speed of the engine), and the pressure-regulated oil is then
fed to various portions through the oil gallery in the cylinder block.
Lubricating oil sent to the oil gallery in the crankshaft lubricates the crank pin portion (4).
Oil sent to the cylinder head via the oil gallery in the cylinder block lubricates rocker arms (1) via a rocker arm
bracket (2).
Other items such as the piston, piston pin bushing (9), cam shaft journal portion, tappet, timing gear and bearings
are lubricated by splash of the crankshaft, etc.
An oil signal (5) is provided to enable the judgement whether the oil pressure is 50 kPa (0.5 kgf/cm
more.
(4) Crank Pin Portion
(5) Oil Signal
1-M10
(6) Relief Valve
(7) Trochoid Pump
ENGINE
(8) Oil Strainer
(9) Piston Pin Bushing
2
, 7 psi) or
9Y1211018ENM0016US0
KiSC issued 05, 2015 A