Thermo King SB-190 30, Manual

Page: 53 / 119

Engine Maintenance (Rev. 12/03)
43
Maintenance
The injection pump and fuel transfer pump are relatively
trouble-free and if properly maintained will usually not
require major service repairs between engine overhauls.
Contamination is the most common cause of fuel system
problems. Therefore, to ensure best operating results, the
fuel must be clean and fuel tanks must be free of contami-
nants. Change the fuel filters regularly and clean the prefil-
ter on the inlet side of the transfer pump.
NOTE: The injection nozzles should be tested (and
repaired if necessary) at 10,000 hour intervals when used
in normal conditions. Normal conditions are considered to
be the use of clean high quality fuel, no used oil blending,
and regular maintenance of the fuel system according to
the Maintenance Inspection Schedule. Refer to the di 2.2
and se 2.2 Overhaul Manual TK 8009, or to Service Bulle-
tin T&T 052, for injection nozzle testing and repair proce-
dures.
Whenever the fuel system is opened, take the following pre-
cautions to prevent dirt from entering the system:
1. Cap all fuel lines.
2. Work in a relatively clean area whenever possible.
3. Complete the work in the shortest possible time.
Any major injection pump or nozzle repairs should be done
by a quality diesel injection service shop. The necessary ser-
vice equipment and facilities are not found in most engine
rebuild shops because of the large investment required.
The following procedures can be done under field condi-
tions:
1. Bleeding air from the fuel system.
2. Fuel tank and filter system maintenance.
3. Priming pump (hand) replacement or repair.*
4. Fuel transfer pump replacement or repair.*
5. Injection line replacement.*
6. Injection pump and governor adjustments.
7. Injection pump timing.
8. Nozzle spray pattern testing and adjustment.*
9. Minor rebuilding of nozzles.*
*These procedures are covered in the di 2.2 and se 2.2
Overhaul Manual TK 8009.
Bleeding the Fuel System
If the engine runs out of fuel, repairs are made to the fuel
system, or if air gets into the system for any other reason,
the air must be bled out of the fuel system.
NOTE: MAKE SURE the fuel tank vent is kept open. If
the vent becomes clogged, a partial vacuum develops in
the tank, and this increases the tendency for air to enter
the system.
Fuel Tank
1. Vent
2. Drain Plug
1
aea751
2