Detroit Diesel 4000 Series, Service Manual, Page: 433 / 2706

SERIES 4000 12/16V SERVICE MANUAL
Bore Values at 12V Counterweights
To determine 12V counterweight bore values, see Figure 213.
A = 5 degrees (minimum)
B = 10 degrees
C = 32 degrees (minimum)
D = 18 mm (.7086 in.) (maximum bore diameter)
E = 40 mm (.5748 in.) (maximum bore depth)
Minimum wall strength around balancing bores is 5 mm (.1967 in.).
Figure 213 Bore Values at 12V Counterweights
Checking Oil Bores
To check oil bores, perform the following steps:
1. Using an borescope, inspect all bores with cold light source.
[a] Clean bores if they are not perfectly clean.
All information subject to change without notice.
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