Lombardini LDW 502 User Manual

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06
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Radiator and compensation, check and seal tank cap.
Remove the cap from compensation tank cap and check that the
liquid is at the correct level.
Replace the cap with a new one provided with hand air pump
socket.
Compress air at a pressure of 1 bar for about two minutes.
Check that there are no drips in the radiator.
The tank cap is supplied with a vacuum relief valve 1 and an
overpressure valve 2.
Overpressure valve opening pressure of 0.7 bar.
Thermostatic valve
1 - Stainless steel or brass casing
2 - Wax bulb
3 - Air relief hole
Characteristics:
Opening temperature: ........ 83°÷87°C
Max stroke at: .................... 94°C = 7 mm
Liquid recycling: ................. 30÷80 l/h.
Coolant circulation pump, components
1 Rotor
2 Front seal gasket
3 Pump casing
4 Exhaust hole
5 Bearing
6 Pulley
7 Shaft
Note: The pump for LDW 1204-1204/T-1404 engines is different
from the one of the other series (fig. 148) due to the
presence of a ring between rotor 1 and gasket 2.
Coolant circuit

Lombardini LDW 502 Specifications

General

Engine Type	Diesel, 4-stroke
Number of Cylinders	2
Fuel System	Indirect injection
Starting System	Electric start
Lubrication System	Forced lubrication with gear pump
Bore x Stroke	72 mm x 62 mm
Cooling System	Air-cooled
Displacement	505 cm³ (30.8 cu in)