Section 01: ENGINE
PA1562
44
2.14 RECOMMENDED ENGINE OIL TYPE
To provide maximum engine life, lubricants shall
meet the following specifications: SAE Viscosity
Grade: 15W-40 API Classification: CJ-4.
CAUTION
Low ash oil formulation designated API CJ-4 is
required in EPA-07 engines.
CJ-4 contains less than 1% ash which is the
key to achieving maximum diesel particulate
filter cleaning intervals. Use of high ash engine
oils will reduce the cleaning interval on the
Diesel Particulate Filter (DPF). DPF
regenerates the combustible soot, but the ash
(a product of the oil lubricant package) slowly
accumulates in the channels of the DPF.
NOTE
Monograde oils should not be used in these
engines regardless of API Service
Classification.
NOTE
The use of supplemental oil additives is
discouraged from use in Detroit Diesel
Engines.
Synthetic oils: Synthetic oils may be used in
Detroit Diesel engines provided they are API-
licensed and meet the performance and
chemical requirements of non-synthetic oils
outlined previously. Synthetic oils do not permit
extension of recommended oil drain intervals.
2.15 POWER PLANT ASSEMBLY REMOVAL
To access the engine or engine-related
components, the vehicle power plant assembly
must be removed as a whole unit by means of a
slide-out cradle. The power plant assembly
includes the engine, transmission (including
retarder if so equipped), air compressor,
alternator and transmission oil cooler.
Remove the power plant assembly as follows:
CAUTION
Tag hoses and cables for identification before
disconnecting in order to facilitate reinstallation.
Plug all openings to prevent dirt from entering
the system.
NOTE
No parts within the MCM are serviceable. If
found defective, replace the MCM as a unit.
1. Disconnect the battery or batteries from the
starting system by removing one or both of
the battery cables from each battery system.
With the electrical circuit disrupted,
accidental contact with the starter button will
not produce an engine start. In addition, the
Electronic Unit Injectors (EUI) will be
disabled, preventing any fuel delivery to the
injector tips.
WARNING
Due to the heavy load of the rear bumper
assembly, it must be adequately supported
before attempting to remove it.
2. Remove the rear bumper assembly from the
vehicle. Refer to Section 18, BODY, under
"REAR BUMPER REMOVAL".
3. Drain the engine cooling system. Refer to
Section 05, COOLING under "DRAINING
COOLING SYSTEM".
FIGURE 23: BELT TENSIONER VALVE
12200
4. Locate the A/C compressor belt tensioner
pressure releasing valve (Fig. 23). Turn
pressure releasing valve handle
counterclockwise in order to release
pressure in belt-tensioner air bellows and
loosen belts. Remove the belts.
5. To release all pressure from the air system.
Refer to Section 12, BRAKES & AIR
SYSTEM for instructions.
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