Servicing Fuel Pump; Servicing Glow Plugs; Testing Flash Relay Circuit; Figure 5.3 Electric Fuel Pump - Carrier Supra 950MT Operation & Service Manual

b. Air Filter Service Procedure
Stop engine, remove air filter, and install new air filter.
5.2.5

Servicing Fuel Pump

a. To check or to replace fuel pump:
1. Remove three screws from cover (refer to
2. Remove cover, gasket, and filter.
3. Wash filter in cleaning solvent and blow out with air pressure. Clean cover.
Protect your eyes carefully from solvent by wearing chemical-safe goggles.
4. Reverse above steps to install.
Bowl
b. To Verify Fuel Pump Capacity:
1. Remove fuel pump from the system. Connect the evacuation manifold to pump outlet. Energize fuel pump
with a small quantity of fuel.
2. At zero flow, the fuel pump should provide about 0.7 bar of pressure at the pump outlet.
3. When running correctly, the fuel pump generates noise according to pulsation of the inner piston.
5.2.6

Servicing Glow Plugs

The CT3.69TV engine has fast glow plugs, which take 45 seconds to reach 1,472° F (800° C) under 11 VDC.
In the case of fast burn of glow plugs, verify that micro configuration is correct - TV for all engine types.
When servicing, the glow plug must be fitted carefully into the cylinder head to prevent damage to the glow plug.
Torque value for the glow plug is 0.8 to 1.5 mkg (6 to 11 ft-lb).
Checking for a Defective Glow Plug
To check for a defective glow plug, place an ammeter (or clip-on ammeter) in series with each glow plug and ener-
gize the plugs. If good, each plug should show amperage draw. A good plug draws 8 to 10 amps.
5.2.7

Testing Flash Relay Circuit

You must lockout/tagout the starter and standby receptacle prior to performing this procedure.
62-11863
Figure 5.3).
WARNING
!

Figure 5.3 Electric Fuel Pump

Filter
Gasket
WARNING
!
5-6
Connector