![background image](http://html1.mh-extra.com/html/carrier/dm-4-power-pack/dm-4-power-pack_operation-and-service-manual_2561249007.webp)
1-3
1
2
3
4
5
1. Engine Block
2. Oil Pan
3. Full Flow Oil Filter
4. Engine Oil Connection
5. Oil Pressure Switch
Figure 1-3. Lube Oil Flow Diagram
1.5 SAFETY DEVICES
System components are protected from damage
caused by unsafe operating conditions by automatically
shutting down the engine when such conditions occur.
This is accomplished by the safety devices listed in
Table 1-1.
1.6 ENGINE AIR SYSTEM
The air cleaner is put on the engine to prolong its life
and performance by preventing dirt and grit from getting
into the engine causing excessive wear on all operating
parts. However, it is the responsibility of the operator to
give the air cleaner regular and consistent attention in
accordance with the instructions. If the air cleaner is
allowed to become dirty, the operation of the engine
would be impaired.
1
2
3
5
6
7
8
10
9
4
Figure 1-4. Fuel System Diagram
1. Fuel Tank
2. Fuel Supply Line
3. Fuel Pump
4. Mechanical Lift Pump
5. Fuel Filter
6. Fuel Bleed Valve
7. Injection Pump
8. Injector Nozzles
9. Fuel Leak-off Line
10. Fuel Return Line
1.7 COMPRESSOR DATA
Compressor Model: Carrier 05K
No. of cylinders:
4
No. of unloaders:
1
Oil charge:
2.6 liters (5.5 pints)
Oil type:
Sunisco 3GS (R22)
Castrol Icematic SW-68 (R134a)
Table 1-1.
Safety Devices
Unsafe Conditions
Safety Devices
Device Setting
Low engine oil pressure
Oil pressure safety switch
Opens below 10
3 psig
High engine coolant temperature
Coolant temperature sensor
(switch gauge)
Opens shutdown circuit above 220
5
_
F
Excessive current draw by glow plug
circuit
Manual reset circuit breaker (CB1)
Opens @ 35 amps.
Excessive current in control circuit
Manual reset circuit breaker (CB2)
Opens @ 35 amps.
Excessive compressor discharge
pressure
High pressure cutout switch
Opens @ 425
10 psig
Closes @ 300
10 psig
Low compressor suction pressure
Low pressure cutout switch
Opens @ 10
3 psig
Closes @ 27
3 psig