ENGINE (for F24O0)

[1] FEATURES

The D1105-F is a water-cooled, 4-cycl e di esel engin e, i ncorporating K UB OTA’s lea ding ed ge technology. By utilizing K UBOTA's unique new TVCS (Three vortex combustion system), the well-known Bosch MD type injection pump and a well balanced design, the engine features greater power, low fuel consumption, reduced vibration and quiet operation.

0343P202

[2] ENGINE BODY

The engine features a high durable tunnel type cylinder block containing the main bearings.

(2)

C095F001

The combustion chamber of this engine uses the new TVCS combustion system. The TVCS combustion system provides three channels in the air inlet of the combustion chamber to produce three streams of air in the chamber when compressing, giving an ideal mixture of air and fuel. The new TVCS combustion system provides a fan-shaped concave on top of the piston to allow a smooth ejection of the exhaust gas, offering highly efficient combustion.

(I) Glow Plug

(2) Injection Nozzle

(3) TVCS Combustion Chamber

‹4› ran shaped Concave

(S) Piston

(6) Cylinder head

(7) Combustion Chamber

(8) Air inlet

(9) Air Stream

(J0) Injection Nozzle

(1)

(2)

(3)

(4)

(S)

(6)

(7)

(8,

The crankshaft ( 1) is driven by the pistons (2) and connecti ng rod s (3) and converts reci procati ng motion into rotary motion. It also drives the oil pum p, c a ms ha f t a nd fu e I c a m s h a ft. S i x Counterweights (8) are integrated into one unit to nJinimi zebearing w ear and Iubr icating oi I temperature rise.

Crankshaft journals, crankpins and oil seal sliding section are induction-hardened to increase wear resistance quality.

Crainkshaft journals are supported by the crankshaft bearings.

Crankshaft bearing 1 (4), located at the front end, is o /inJ type bushing and the other bearings 2 (5) anJ 3 (6), located behind, are split type bushings.

Side bearings 1, 2 (7) are of split type and are mounted on both sides of the main bearing case wheel at the flywheel side.

Crankshaft bearings and side bearings are plated with a special alloy to increase wear resistance.

(4) Piston and Piston Rings

This pi ston i s m a de of an alum inum alIo y. Provided on top of the piston are a valve recess (1) and a fan-shaped concave (2) to all ow sm ooth ej ection of the ex haust gas. The piston pin is positioned off the center, which prevents a swing of the piston at the top and bottom dead centers, reducing operation noise.

The piston ring consists of three rings: the top ring (3) of keystone shape with great d urabi lity against heavy loads, barrel-faced in the part sliding on the cyli nder wall and with hard c hro m ium inserted; the second ring (4) of undercut shape for enhanced efficiency in the prevention of a rise of oil; and the oil ring (5) of coil-expander shape exrell.•i i in oil-removing performance with its circuit› fei ei it i.›l surface hard-chromium-plated.

(1) Valve Recess

(2) Fan-shaped Concave

(3) Top Ring

(5) Camshaft and Fuel Camshaft

(4) Second Ring

(S) Oil Ring

(6) Hard Chrome Plating

The camshaft (3) is made of special cast iron and the journal and cam sections are chilled to resist wear. The journal sections are force-lubricated. The fuel camshaft (6) controls the reciprocating motion of the injection pump. The fuel camshaft is made of carbon steel and cam sections are quenched and tempered to provide greater wear resistance.

(' ) Push Rod

(2) Tappet

{3) Camshaft

(4) Camshaft Stopper

(5) Cam Gear

(6) Fuel Camshaft

(7) Fuel Camshaft Stopper

(8) Injection Pump Gear

(9) Lift Pump Cam

(10) Cap Nut

(6) Timing Gear

The timing gears are arranged as shown in the photograph. The rotation of the crankshaft is transmitted by the timing gears to the camshaft, fuel camshaft and others, which drives the inleVexhaust valves, injection pump, etc. Set the marks of each gear in the right positions when fitting, and opening and closing of the inlet/exhaust valves and injection of the fuel will synchronize with the vertical travel of the piston.

M Valve Timing. Injection Timing lntak e valve open (I O) lntak e valve close (I.C)

Exhaust valve open (E.0)

Exhaust valve close (E C)

The flywheel is connected with the crankshaft. The flywheel functions by storing the explosive force from each cylinder as an inertia Jorce and using this force to maintain smooth rotation of the flywheel. On the circumference of the flywheel are stamped the fuel injection timing and top dead center marks. The flywheel and crankshaft can be fixed to each other at a certa in poi nt accord ing I o the arrangement of flywheel mounting bolt hole.

1/TC Mark tor top dead center cf 1st piston

1/FC Mark for fuel injection of 1St piston