13.2 Engine Operating Conditions
DETROIT DIESEL 53
-53 IN-LINE
3
ENGINE
(4-Valve Cylinder Head)
2200 rpm
2500 rpm
.2800 rpm
Lubrication System
Lubricating oil pressure (psi):
Normal
40-60
40-60
40-60
Minimum for safe operation
30.0
32.0
32.0
*Lubricating oil temperature (degr. F.) - max
200-235
200-235
200-235
Air System
Air box pressure (inches mercury) - min. at full load:
4.8
At zero exhaust back pressure
3.7
6.1
8.0
At maximum exhaust back pressure
5.4
9.3
Air inlet restriction (inches water) - full load max.:
25.0
23.0
18.8
Clean air cleaner - oil bath or dry type
with precleaner
14.0
12.0
16.0
Clean air cleaner - dry type without precleaner
7.4
8.7
10.0
Crankcase pressure (inches water) - max.
0.8
0.9
1.0
Exhaust back pressure (inches mercury) - max.:
Full load
4.0†
3.0
4.0+
No load
2.1
2.7†
2.7 + +
Fuel System
Fuel pressure at inlet manifold (psi):
Normal with . 0 7 0 " restriction
45-70
45-70
45-70
Minimum
35
35
35
Fuel spill (gpm) - minimum at no-load:
0.6
. 0 7 0 " restriction
0.6
0.6
Fuel pump suction at pump inlet
(inches mercury) - max.:
Clean system
6.0
6.0
6.0
Dirty system
12.0
12.0
12.0
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