Thermo King MD-MT, Operator'S Manual

Page: 79 / 192

79
Engine Maintenance
EMI 2000
EMI 2000 is an extended maintenance interval
package. It was phased in as standard equipment
on this unit in the first quarter of 2001. The EMI
2000 package consists of the following key
components:
• New EMI 2000-Hour Cyclonic Air Cleaner
Assembly and Air Cleaner Element (Standard
equipment on all TS units)
• New EMI 2000-Hour Fuel Filter (black with
gold lettering)
• New EMI 2000-Hour By-Pass Oil Filter
(black with gold lettering)
• API Rating CG-4 Mineral Oil
• Five Year or 12,000 Hour ELC (Extended Life
Coolant).
The EMI package allows standard maintenance
intervals to be extended to 2,000 hours, or 1 year,
whichever occurs first.
NOTE: Units equipped with the EMI 2000
package do require regular inspection in
accordance with Thermo King’s maintenance
recommendations.
NOTE: The new EMI 2000 oil filters and new
EMI 2000 air cleaners are NOT interchangeable
with the oil filters and air cleaners previously
used in this unit. See Service Bulletin T&T 275
for information about retrofitting EMI 2000
components.
Engine Lubrication System
The TK 3.74 diesel engine has a pressure
lubrication system. Oil is circulated by a trochoid
type oil pump driven by the crankshaft timing
gear and has several times the capacity required
by the engine. Oil is picked up through a suction
tube with a screened inlet. Oil to the rocker arm
shaft flows through a tube on the outside of the
engine and into the head through a restrictor
fitting.
Oil pressure is affected by oil temperature,
viscosity and engine speed. Subnormal oil
pressures usually may be traced to lack of oil,
faulty relief valve or worn bearings. The use of
improper viscosity oil will also produce low oil
pressure shutdowns.
Engine Low Oil Pressure Switch
Engine oil pressure should rise immediately on
starting. A low oil pressure switch will trip the
reset switch and stop the engine if the oil pressure
drops below 10 ± 2 psig (69 ± 14 kPa). A
continuity tester is needed to check the oil
pressure switch.
1. Remove the wire 20A from the switch.
2. Continuity tester should indicate a complete
circuit between the 20A wire terminal and
ground.
3. Start the engine. Tester should show an open
circuit between the 20A wire terminal and
ground.
Maintenance consists of replacing the switch.
Engine Oil Change
The engine oil should be changed according to the
“Maintenance Inspection Schedule”. Drain the oil
only when the engine is hot to ensure that all the
oil drains out. When changing oil, try to make
sure that the unit is not tipped away from the
direction that the oil is supposed to flow out of the
oil pan. It is important to drain as much of the
residual oil as possible because most of the dirt
particles are in the last few quarts of oil that are
drained from the oil pan. Refill the oil pan (refer
to the “Specifications” chapter) and check the oil
level. Run the unit, and then recheck the oil level.
Add oil as necessary to reach the full mark on the
dipstick. See the Specifications page for the
correct type of oil.