REPAIR INSTRUCTIONS
Page 211
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 E-Tech™ and E7
gear set helixes, it is important that the correct
replacement parts are used in making the repair.
r An improper drive gear on the oil pump will
prevent oil pump installation, assuming a
correct gear is on the auxiliary shaft.
r If an oil pump and an auxiliary shaft
assembly were replaced, two improper
gears could be installed, and engine failure
would result.
r 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.
DISASSEMBLY
Refer to Figure 216.
1. For ease of disassembly, reinstall the oil
pump in the cylinder block or in a suitable
holding fixture.
2. Remove the oil inlet (pickup) tube and
screen assembly (not shown).
Before inlet tube removal, note the orientation of
tube for reassembly purposes. Inlet tubes are
positioned differently for front or rear sump
applications. Caution must be used to ensure that
the correct mounting holes are used for the
proper sump application.
3. Remove the oil pressure relief valve cap
(13).
4. Remove the oil pressure relief valve spring
(12) and plunger (11).
5. Remove the oil pump housing cover (7) from
the oil pump housing (4).
6. Slide the oil pump idler gear (14) off the
shaft.
7. Remove the oil pump from the cylinder block
or other suitable holding fixture.
8. Turn the oil pump upside down and remove
the oil pump shaft nut (1) and washer (2).
9. Using a press, remove the driven gear (3)
and key (5) from the pump gear and shaft
assembly (6).
10. Remove the pumping gear/shaft assembly
and thrust washer from the housing.
11. Remove the oil pump inlet flange plate (9)
and gasket (8) from the housing by removing
the capscrews (10).
5_106_00.bk Page 211 Friday, August 4, 2000 11:17 AM
BDC for engine manuals and specs
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