Yanmar 4JH4E - Lube Oil Pump Inspection

8. Lubrication system
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8.2.4 Lube oil pump inspection
The right figures show the examples of lube oil
pump of 3JH4E and 4JH4E.
It is the same procedure for the 4JH4-TE and
4JH4-HTE lube oil pump as well.
(1) Outside clearance of outer rotor
Insert a gap gage between an outer rotor and a
pump body, and measure the clearance.
(2) Clearance between outer rotor and inner
rotor
Insert a gap gage between an outer rotor and
an inner rotor, and measure the clearance.
(3) Side clearance of outer rotor
When measuring a side clearance, put a right-angle
gage to the pump body, insert a gap gage and mea-
sure the clearance.
Outside clearance mm
Standard Limit
3JH4E/4JH4E 0.12-0.21 0.30
4JH4-TE/4JH4-HTE 0.09-0.16 -
mm
Standard Limit
3JH4E/4JH4E - 0.16
4JH4-TE/4JH4-HTE - 0.16
Side clearance mm
Standard Limit
3JH4E/4JH4E 0.02-0.07 0.12
4JH4-TE/4JH4-HTE 0.05-0.1 0.15
Inner rotor Outer rotor
010671-00E
Outer rotor
010670-00E