Thermo King SB-210, Manual

Page: 82 / 159

Engine Maintenance
82
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 contaminants. Change the
fuel filter/water separator regularly and clean the
prefilter on the inlet side of the fuel 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 TK 482 and TK 486
Overhaul Manual TK 50136 for injection nozzle
testing and repair procedures.
Whenever the fuel system is opened, take the
following precautions 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 service 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
conditions:
1. Bleeding air from the fuel system.
2. Fuel tank and filter system maintenance.
3. Priming pump (hand) replacement or repair.
4. Fuel 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.
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.
To bleed air from the fuel system:
1. Loosen the bleed screw in the inlet fitting on
the injection pump.
1. Stand Pipes 4. Drain
Plug
2. Anti-Siphon Screen
(Optional) 5. Vent
3. Fuel Gauge
Figure 67: Fuel Tank
5
4
AEA751
1
3
2