
The gear wheel pump is assembled on the rear part of the
high pressure pump.It transfers the fuel from tank to the high
pressure pump.
It is set into rotation by the high pressure pump shaft. Under
normal operation conditions the fuel flow inside the
mechanical pump is illustrated in figure 37.
N60 ENT M37
OVERVIEW
1.32
APRIL 2004
Low pressure feed pump
A. Fuel inlet from tank - B. Fuel outlet to filter - 1. Recirculation valve - 2. By-pass valve.
In the case of overpressure at the outlet, figure 38, recircula-
tion valve comes into action.
The existing pressure, overcoming the spring valve elastic
strength (1), connects the outlet with the inlet through duct
(2), recirculating the fuel in excess inside the pump and keep-
ing a pressure rating equal to that one of the setting of the
valve.
A. Fuel inlet from tank - B. Fuel outlet to filter - 1. Recirculation valve - 2.By-pass valve.
Figure 37
Figure 38
04_043_N
1
2
A
B
04_044_N
1
2
A
B
Summary of Contents for N60 ENT M37
Page 4: ...N60 ENT M37 IV APRIL 2004 ...
Page 52: ...N60 ENT M37 OVERVIEW 1 52 APRIL 2004 ...
Page 54: ...N60 ENT M37 TECHNICAL DATA 2 54 APRIL 2004 ...
Page 60: ...N60 ENT M37 TECHNICAL DATA 2 60 APRIL 2004 ...
Page 62: ...N60 ENT M37 ELECTRICAL EQUIPMENT 3 62 APRIL 2004 ...
Page 92: ...N60 ENT M37 DIAGNOSTICS 4 92 APRIL 2004 ...
Page 116: ...N60 ENT M37 DIAGNOSTICS 4 116 APRIL 2004 ...
Page 118: ...N60 ENT M37 MAINTENANCE 5 118 APRIL 2004 ...
Page 122: ...N60 ENT M37 MAINTENANCE 5 122 APRIL 2004 ...
Page 124: ...N60 ENT M37 SERVICING OPERATIONS ON INSTALLED ENGINE 6 124 APRIL 2004 ...
Page 139: ...SECTION 7 TOOLS Page TOOLS 141 N60 ENT M37 TOOLS 7 139 APRIL 2004 ...
Page 140: ...N60 ENT M37 TOOLS 7 140 APRIL 2004 ...
Page 146: ...N60 ENT M37 TOOLS 7 146 APRIL 2004 ...
Page 156: ...APRIL 2004 OVERHAUL 8 156 N60 ENT M37 ...
Page 164: ...APRIL 2004 OVERHAUL 8 164 N60 ENT M37 ...
Page 181: ...OVERHAUL APRIL 2004 N60 ENT M37 8 181 ...
Page 188: ...N60 ENT M37 OVERHAUL 8 188 APRIL 2004 ...
Page 190: ...N60 ENT M37 SAFETY PRESCRIPTIONS 9 190 APRIL 2004 ...
Page 193: ......