Lubricating System; Checking - Kubota Z400-B Handbuch

LUBRICATING SYSTEM
CHECKING
Engine Oil Pressure
1. Remove the oil pressure switch and install the oil pressure
adaptor and the oil pressure tester (Code No.: 07916­
32031 ).
2. Start the engine and run it until it is warmed up, and
measure the oil pressure both at idling and rated speed.
3. If the oil pressure is less than the allowable limit, check
and repair referring to the causes below.
• Engne oil insufficient
• Oi I filter clogged
• Dirt in relief valve
• Oil gallery clogged
• Excessive oi I clearance
• Oil pump defective
I
Tightening torque Oil pressure switch
14.7
to
19.6
Nom
1.5 to 2.0 kgfom
10.8 to 14.5 ft-Ibs
Engine oil
pressure
At idle
speed
Factory
specification
more than
69
kPa
0.7
kgf/cm2
10 psi
At rated
speed
Factory
specification
196 to 441 kPa
2.0 to 4.5
kgf/cm 2
28
to
64
psi
Allowable
limit
69
kPa
0.7
kgf/cm2
10
psi
(The engine oil temperature at 90° to 95°C, 194° to 203°F)
Oil Filter and Relief Valve
1. Drain the engine oil.
2. Remove the oil filter and check it.
3. Check the relief valve for dirt.
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