Piston Cooling Nozzle - Yanmar 4LHA-HTP Operation Manual

Chapter 5 Lubrication System
5. Lube Oil Cooler

6. Piston Cooling Nozzle

6-1 P i s t o n c o o l i n g n o z z l e c o n s t r u c t i o n
A nozzle made from steel pipe mounted on the lower part
of cylinder body main gallery.Lube od from the main gallery is
sprayed out in a jet from the steel tip of this pipe.
This jet spray cools the piston surface when the piston goes
down
4LHA-HTE/HTZ E/HTP/HTZP
Splash
Cylinder body
main gallery
Piston cooling nozzle
(Dia. 2.0 mm)
Oil injection volume
Oil injection pressure
4LHA-DTE/DTZE/DTP/DTZP
S p l a s h
Cylinder body
main gallery
Piston cooling nozzle
(Dia. 2.7 mm)
Pislon
2.5 6 /min.
0.39MPa(4.0kgf/cm )
2
Piston
Oil injection volume
Oil injection pressure
6-2 Inspection of p i s t o n c o o l i n g n o z z l e
(1) Check the nozzle tip hole to see if it is clogged up with dirt
or other foreign matter, and clean.
(2) Inspect the pipe mounting to see it it is or may become
loose or come off due to vibration, etc., and replace if nec-
essary.
Cylinder block
4LHA-STE/STZE/STP/STZP
Piston cooling nozzle same as 4 L H A - D T E one.
3.5~4.0 & /min.
0.39MPa(4.0kgf/cm )
2
5-10
i4LHA Series
Pislon cooling nozzle