Fig. 2 - Blower Lubrication.
To obtain the true oil level, the engine should be
which the teeth of the lower blower rotor timing gear run.
stopped and sufficient time (approximately twenty
A slinger at the forward end of lower rotor throws oil
minutes) allowed for the oil to drain back from the
from the dam onto the governor weight assembly.
various parts of the engine. If more oil is required, add
Surplus oil overflows the dam in the two end plate
only enough to bring the level to the full mark on the
covers and passes through drilled holes in the cylinder
block to the oil pan.
Cleaning Lubrication System
Lubrication System Maintenance
Thorough flushing of the lubrication system is required
Use the proper viscosity grade and type of heavy duty
at times. Should the engine lubrication system become
oil as outlined in the Lubrication Specifications on Page
contaminated by ethylene glycol antifreeze solution or
10-9-9. Change the oil and replace the oil filter
other soluble material, refer to Chapter 6 for the
elements at the periods recommended by the oil
recommended cleaning procedure.
supplier (based on his analysis of the drained engine oil)
to ensure trouble-free lubrication and longer engine life.
Detection of Lube Oil Leaks
The oil level should never be allowed to drop below the
low mark on the dipstick. Overfilling the crankcase may
Detroit Diesel Allison uses red dye to detect lube oil
contribute to abnormal oil consumption, high oil
system leaks during engine test. Customers receiving
temperature, and also result in oil leaking past the
new engines may notice some residual dye remaining in
crankshaft rear oil seal.
their lube oil systems. This dye should be quickly
dispersed after the first few hours of engine operation.