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Lubricating System
Lubricating System
The dependability,
life economical operation of an engine are largely determined by the
efficiency of it’s
lubricating system and the care and attention devoted to it. It is
for this reason that the Bolinder lubricating
system has been designed for simplicity and automatic function.
Under normal conditions all that is needed is
to maintain the correct oil level, change the prescribed times and
check the oil pressure at regular intervals.
The engine is pressure lubricated ( fig 10 ). Pump 4 sucks the oil
from sump 6 and feeds it to the various
lubricating points. To prevent the pump sucking up impurities
deposited at the bottom of the sump, the oil Is
first compelled to pass through strainer 5 in the float on the pump
section pipe.
Fig 10. General arrangements of oil system,
three-cylinder engines.
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1. Shot lubrication of valve mechanism
2. Reduction valves
3. Lubricant filter |
4.
Oil pump
5. Strainer
6. Oil Oil sump
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From the pump
the oil is forced through oil filter 3 for efficient cleaning.
It is then distributed to all main
and big-end bearings, camshaft bearings, piston pins, valve
mechanism and timing gears. Oil is fed to the
valve mechanism by so-called shot lubrication from the central
camshaft bearing, implying that the oil is
supplied intermittently ( 1. fig 10 ). This arrangement
restricts the amount of oil supplied and prevents
excessive lubrication.
On the right-hand side of the cylinder block front edge there is
a reduction valve 2. This maintains the oil
pressure in the system at 40 – 60 lb/sq.in. ( 3 – 4 kg/sq.cm. )
at normal r.p.m. (1500) and normal engine
temperature ( 160 – 175deg F [ 70 – 80deg C ] )
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