Engine Oil Pressure; Rotor Lobe Clearance; Clearance Between Outer Rotor And Pump Body; Lubricating System 1-S49 - Kubota B2410 Workshop Manual

82410 • 82710 • 82910 WSM, 12271
[3] LUBRICATING SYSTEM
CHECKING
12120F10190
SERVICING
1 ENGINE
Engine Oil Pressure
1. Remove the engine oil pressure switch, and set a oil pressure
tester (Code No. 07916-32032).
2. Start the engine. After warming up, measure the oil pressure of
both idling and rated speeds.
3. If the oil pressure is less than the allowable limit, check the
following.
• Engine oil insufficient
• Oil pump defective
• Oil strainer clogged
• Oil filter cartridge clogged
• Oil gallery clogged
• Excessive oil clearance
• Foreign matter in the relief valve
At idle
More than 49 kPa
speed
Factory spec. 0.5 kgf/cm
2
7 psi
Engine oil
196 to 441 kPa
Factory spec. 2.0 to 4.5 kgf/cm
2
pressure
At rated
36 to 64 psi
speed
147 kPa
Allowable limit
1.5 kgf/cm
2
27 psi
(When reassembling)
• After checking the engine oil pressure, tighten the engine oil
pressure switch to the specified torque.
12460810720
Rotor Lobe Clearance
1. Measure the clearance between lobes of the inner rotor and the
outer rotor with a feeler gauge.
2. If the clearance exceeds the factory specifications, replace the
oil pump rotor assembly.
Clearance between Outer Rotor and Pump Body
1. Measure the clearance between the outer rotor and the pump
body with a feeler gauge.
2. If the clearance exceeds the factory specifications, replace the
oil pump rotor assembly.
00000F10570
00000F10590
Rotor lobe clearance
Clearance between outer
rotor and pump body
1-849
Factory spec.
Factory spec.
0.06 to 0.18 mm
0.0024 to 0.0071 in.
00000810421
0.100 to 0.180 mm
0.0039 to 0.0071 in.
00000810431