Portable Compressor 7/20
14---3
SEPTEMBER 2003
Table 14---2.
(continued) ENGINE TROUBLESHOOTING
Fault
Remedy
Cause
Fuel is thick and doesn‘t flow
Check the fuel tank and fuel filter. Remove water, dirt and other
impurities
As all fuel will be filtered by the filter, if there should be water or
other foreign matters on the filter, clean the filter with kerosene
Air or water mixed in fuel system
If air is in the fuel filter or injection lines, the fuel pump will not
work properly. To attain proper fuel injection pressure, check
carefully for a loosened fuel line coupling, a loose of cap nut,
etc.
Loosen join bolt, a top fuel filter and air vent screws of fuel
injection pump to eliminate all the air in the fuel system
Thick carbon deposits on orifice of
injection nozzle
This is caused when water or dirt is mixed in the fuel. Clean the
nozzle injection piece, being careful not to damage the orifice
Check to see if nozzle is working properly or not. If not, install a
new nozzle
Difficult to start the
engine
Valve clearance is wrong
Adjust valve clearance to 0.145÷0.185 mm (0.006÷0.007 in)
when the engine is cold
Leaking valves
Grind valves
Fuel injection timing is wrong
Adjust injection timing
The injection timing 0.33 rad (19
˚
) before the top dead center
Engine oil becomes thick in cold
weather and engine cranks slow
Change grade of oil according to the weather (temperature)
Low compression
Bad valve or excessive wear of rings, pistons and liners cause
insufficient compression Replace with new parts
Battery is discharged and the engine
will not crank
Charge the battery
In winter, always remove the battery from machine, charge fully
and keep indoors. Instal in machine at time of use
NOTE
If the cause of trouble can not be found, contact your local Ingersoll ---Rand dealer.
Carbon stuck around orifice of nozzle
piece
Clean the orifice and needle valve, being very careful not to
damage the nozzle orifice
Check nozzle to see if good. If not, replace with new parts
Compression is insufficient
Leaking valves
Bad valve and excessive wear of rings, pistons and liners cause
insufficient compression. Replace with new parts
Grind valves
Fuel is insufficient
Check fuel system
When output is
insufficient
Overheating of moving parts
Check lubricating oil system
Check to see if lubricating oil filter is working properly
Filter element deposited with impurities would cause poor
lubrication. Change element
Check the clearance of bearing are within factory specs
Check injection timing
Valve clearance is wrong
Adjust to proper valve clearance of 0.145÷0.815 mm
(0.006÷0.007 in) with engine cold
Air cleaner is dirty
Clean the element every 100 hours of operation
Fuel injection pressure is wrong
Adjust to proper pressure. 13.7 MPa (1,991 psi)
Injection pump wear
Do not use poor quality fuel as it will cause wear of the pump. Only
use No.2---D diesel fuel
Check the fuel injection pump element and delivery valve
assembly and replace as necessary
(continued on next page)
