Thermo King SGCO 3000, Руководство пользователя

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Engine Maintenance
108
Trochoid Feed Pump
The TK486V engine has a trochoid feed pump on
the fuel injection pump. The trochoid feed pump
supplies fuel to the injection pump at a pressure of
450 to 600 kPa (65 to 87 psi) in high speed. Check
the outlet pressure of the trochoid feed pump by
removing the plug and attaching a pressure gauge
to the port shown below. The plug has M12x1.25
threads. You will have to make an adaptor to
attach a pressure gauge. Replace the trochoid feed
pump if the outlet pressure is below the pressure
specifications in the following table.
Trochoid Feed Pump Leaks
Internal – If the seal in the trochoid feed pump
fails, it could allow some fuel to leak into the
engine oil. A faulty injection nozzle or fuel
transfer pump can also dilute the engine oil with
fuel. Replace the trochoid feed pump if the engine
oil is being diluted with fuel and a faulty injection
nozzle or fuel transfer pump is not the cause.
External – Replace the O-ring seal between the
trochoid feed pump and the injection pump if oil
is leaking. Torque the bolts to prevent leaks (8 to
10 N•m [6 to 7 ft-lb]).
Replace all O-rings if fuel is leaking. Torque the
Allen head screws and Hex head bolts to prevent
leaks (8 to 10 N•m [6 to 7 ft-lb]).
Trochoid Feed Pump Replacement
Use the following procedure to replace the
trochoid feed pump.
1. Remove the four hex head screws that attach
the trochoid feed pump to the injection pump.
Do not remove the two Allen head screws.
2. Remove the trochoid feed pump from the
injection pump.
NOTE: The gear on the trochoid feed pump
is lubricated with engine oil. Some engine oil
might leak out of the injection pump when
the trochoid feed pump is removed. The
trochoid feed pump does not need to be timed
when it is installed.Clean the area on the
injection pump from which the trochoid feed
pump was removed.
Trochoid Feed Pump Outlet Pressure
Cranking 103-206 kPa (15-30 psi)
Low Speed 206-345 kPa (30-50 psi)
High Speed 450-600 kPa (65-87 psi)
1. Trochoid Feed Pump Outlet Pressure Port
2. Trochoid Feed Pump
Figure 81: Trochoid Feed Pump Location
1
2
1. Allen Head Screws (Do Not Remove)
2. Hex Head Screws
Figure 82: Trochoid Feed Pump Removal
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