REPAIR INSTRUCTIONS, PART 1
Page 273
LUBRICATION SYSTEM
BENCH PROCEDURES
Oil Cooler Assembly
Reconditioning
[215 DW]
See Cooling System Components Bench
Procedures in the REPAIR INSTRUCTIONS
section.
Oil Pump Reconditioning
[219 MU]
Because of differences in the gear set helixes, it
is important that the correct replacement parts
are used in making the repair.
앫 An improper drive gear on the oil pump will
prevent oil pump installation, assuming a
correct gear is on the auxiliary shaft.
앫 If an oil pump and an auxiliary shaft
assembly were replaced, two improper
gears could be installed, and engine failure
would result.
앫 In replacing any of these critical parts,
always refer to part number information in
the MACK Parts System to ensure the
correct component/part is being used.
THREE OIL PUMP CONFIGURATIONS
Three different oil pump versions are possible in
an ASET™ engine dependent on date of
manufacture or if a remanufactured or new oil
pump has been previously installed. The main
difference in the three oil pump configurations is
in the oil pressure relief valve area. Other areas
of the pump, such as the gears and shafts,
remain basically the same. The three oil pump
configurations are as follows:
앫 Standard E-Tech™/ASET™
This is the original oil pump configuration
from production introduction of
E-Tech™/ASET™ through mid-2004.
Remanufactured oil pumps will be of this
configuration.
303
Figure 303 — Oil Pump Pressure Relief Valve
1. Oil Pump Housing Cover
2. Plunger
3. Relief Valve Spring
4. Relief Valve Cap
5-111.bk Page 273 Monday, July 10, 2006 2:26 PM
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