These diesel engines are extremely simple and are of closed
crankcase design with all the working parts totally enclosed.
These engines operate on 4 stroke principle at the relatively
low speed of 1000 r.p.m. They are easy to maintain, economical
to run and need minimum replacement of spare parts. Oil engines
are widely used for pumps for irrigation purposes, Tube-Wells,
Concrete Mixtures, Flour Mills and Rice Hurlers, Saw Mills,
Rotary Oil Mills, electric generators etc.
The combustion chamber with its comp.
Ratio provides for easy hand starting even in winter for which 4
stroke diesel engine have on extremely good reputation.
Diesel engine is single cylinder ,4 stroke, water cooled,
vertical, cold starting totally enclosed.
Combustion chamber is open type .This has
cast iron piston in LR-4 type and aluminum alloy piston in LR-7
type engine, Respectively having four compression and one oil
ring in LR-4 type and three compression and two oil rings in
LR-7 type engine.
Main bearings are taper roller bearings. Large
and bearings of C. rod is of steel and white metal, Rockers and
C. rod small end bush are of gun metal.
Large and bearings and main bearings are lubricated by splash
lubrication in LR-4 model engine and by reciprocating lub. oil
pump in LR-7 model engine. Camshaft bush is also lubricated by
splash, Rocker bushes are lubricated by cup fed lubrication.
Speed of engine is controlled by
governor. It is fully closed. It is fixed on camshaft gear
Flywheel is also balanced to increase the life of engine and the
Engine is cooled by radiator or water
tank or run through system.
SYSTEM: One pepper pot type silencer is fitted to
reduce the sound .
Oil bath air cleaner is fitted to filter the air.
Engine is started by handle manually.
Clockwise when looking at flywheel with exhaust
on left hand side.
The engine efficiency & fuel
consumption is better if the water outlet temperature is
maintained between 500C to 700C. Please run the engine at
Starting Handle, five wrenches,
silencer, screw driver, air cleaner, Oil can. Pulley.