MCi Crusader II 1989 Maintenance Manual page 331

Date
1-1-89 Page ___
10_-1 _ _
MC-9 MAINTENANCE MANUAL
· LUBRICATION
Engine crankcase oil should be checked daily or before the
start of each run and oil added to bring the level to the "Full"
mark on the dipstick. A new oil filter element should be installed
each time the crankcase oil is changed.
OIL CHANGES
The oil service period is dependent on the operating condi-
tions (e.g. load factors, etc.) of an engine that will vary with the
numerous service applications. The oil change interval should
be based on 300 operating hours times the average vehicle
operating speed. See the example in the chart, below.
AVG. OPERATING SPEED
50 mph (x 300 hrs
=)
40mph
30mph
OIL CHANGE INTERVAL
Miles
15,000
12,000
9,000
Km
24.000
19,000
14,500
The oil change interval may be gradually increased or
decreased with experience on a specific lubricant while also
considering the recommendations of the oil supplier (analysis
of drained oil can be helpful) until the most practical oil change
period for the particular service has been established.
Solvents should not be used as flushing oils in running
engines. Dilution of the fresh refill oil supply can occur, which
may be detrimental. .
Full flow oil filtration systems have been used in 6V-92 and
BV-92 diesel engines since they were first introduced. For the
best results, the oil filter element should be replaced each time
the oil is changed.
Engine flow oil temperature should be checked every 25,000
miles (40.000 km) to determine oil cooler efficiency. This check
should be made by inserting a steel jacketed thermometer in the
dipstick opening immediately after stopping a hot loaded
engine. If the oil temperature exceeds the coolant temperature
by more than 60°F (33°C), the oil cooler r:nay be clogged.
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, • OIL
• ··RESERVE
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TANK
Figure
10-1.
Engine Lubrication Tank (Optional) and Related
Components.
Satisfactory prolonged heavy-duty engine operation requires
heavy-duty lubricating oils with additives. These oils provide
better lubrication, have more heat resistance and counteract
sludge formation more effectively than the straight mineral type
oils. Refer to Section. 8, Engine, for detailed oil specifications.
OIL RESERVE TANK
A two-gallon (7.6 L) oil reserve tank is available as optional
equipment (see figure 10-1 ). It is connected to the crankcase by
a hose with a shut-off valve, allowing oil to be added to crank-
case by opening the valve. Comparison of oil levels in the sight
gauge. before and after adding oil to the crankcase. shows how
much oil was added.
COLD WEATHER OPERATION
Cold weather starting will be easier when immersion type
electrical coolant heaters are used. Other practical considera-
tion, such as the use of batteries. cables and connectors of
adequate size, proper setting of voltage regulators, ether start-
ing aids, and proper fuel selection will enhance starting with the
use of SAE30 or SAE40 oils.
BREAK IN PERIOD
Lubricant in the transmission and differential supplied as
"factory fill" in new coaches should be drained and refilled after
1,000 miles (1,600 km) and in no case over 3.000 miles (4,800
km) of initial operation.
A lubrication chart is included in this section to give approx-
imate location of key service points on the 96A2/102A2 and
96A3/ 102A3 model coaches. Where cleaning, removal or dis-
assembly are required for lubrication purposes. these proce-
dures are covered in the applicable sections of this manual.
Lubricant compartments of the engine and transmission are
provided with dipsticks for checking lubricant level. Power
steering fluid reservoir and blowe.r drive gear box are equipped
with sight gauges to facilitate checking of oil level.
A preventive maintenance schedule is also included at the
end of this section. It includes lubrication. cleaning and inspec-
tion intervals.
FLEXIBLE HOSES
MAINTENANCE
The performance of the engine and auxiliary equipment is
greatly dependent on the ability of flexible hoses to transfer
lubricating oil. air, coolant and fuel oil. Main ;enance of hoses is
an important step to ensure efficient. economical and safe
operation of the engine and related equipment
Ch~ck hoses daily as part of the pre-start up inspection.
Examine hoses for leaks. and check all fittings. clamps. and ties
carefully. Ensure that hoses are not resting on or touching
shafts. couplings, heated surfaces including exhaust mani-
folds, any sharp edges, or other obviously hazardous areas.
Since all machinery vibrates and moves to a certain extent
clamps and ties can loosen and wear with age. To ensure
continued proper support. inspect fasteners frequently and
tighten or replace them as necessary.
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