Lull 944E-42 Service Manual - Manual (Page 107)

7-5 944E-42
Engine
12. Label and disconnect the air intercooler hoses (7).
Inspect the hoses and replace if necessary.
13. Label and disconnect the radiator hoses (8). Inspect
the hoses and replace if necessary.
14. Disassemble the radiator from the frame assembly
by removing capscrews, washers, isolators (9 & 10).
15. Attach lifting straps to the two eye bolts (11) on top of
the radiator assembly.
16. Remove the radiator assembly
b. Radiator/Oil Cooler Installation
1. Assemble the radiator to the frame assembly with
the previously used hardware (9).
2. Uncap and connect the previously labeled hoses to
the transmission cooler (4).
3. Uncap and connect the previously labeled hoses to
the hydraulic oil cooler (3).
4. Connect the previously labeled hoses to the radiator
(8).
5. Connect the previously labeled hoses to the air inter
cooler (7).
6. Properly connect the batteries.
7. Open the radiator cap (1) and fill the radiator
completely with a 50/50 mixture of ethylene glycol
and water. Replace and tighten the radiator cap.
Refer to Section 2.4, “Fluid and Lubricant
Capacities,” for proper capacities.
8. Run the engine to operating temperature. Visually
check for leaks with the engine running. Check the
coolant level in the overflow bottle and fill, or drain,
as necessary.
9. Close and secure the engine cover.
7.5 ENGINE ELECTRICAL SYSTEM
The engine electrical system, including the starter,
alternator and primary wiring, is described in Section 9.5,
“Electrical Schematics.”
7.6 FUEL SYSTEM
7.6.1 Diesel Fuel
Fuel represents a major portion of machine operating
costs and therefore must be used efficiently. ALWAYS
use a premium brand of high-quality, clean diesel fuel.
Low cost, inferior fuel can lead to poor performance and
expensive engine repair.
Note: Use only diesel fuel designed for diesel engines.
Some heating fuels contain harmful chemicals that can
seriously affect engine efficiency and performance.
Note: Due to the precise tolerances of diesel injection
systems, keep the fuel clean, and free of dirt and water.
Dirt and water in the fuel system can cause severe
damage to both the injection pump and the injection
nozzles. Use ASTM #2 diesel fuel with a minimum Cetane
rating of 40. #2 diesel fuel gives the best economy and
performance under most operating conditions. Fuels
with Cetane numbers higher than 40 may be needed in
high altitudes or extremely low ambient temperatures to
help prevent misfiring and excessive smoking.
Inform the owner/operator of the machine to use #2
diesel fuel, unless ambient temperatures are below 32° F
(0° C). When temperatures are below 32° F (0° C), a
blend of #1 diesel and #2 diesel fuels (known as
“winterized” #2 diesel) may be used.
Note: #1 diesel fuel may be used, however, fuel
economy will be reduced.
Use a low-sulfur content fuel with a cloud point (the
temperature at which wax crystals form in diesel fuel) at
least 10° below the lowest expe.cted fuel temperature.
The viscosity of the fuel must be kept above
1.3 centistrokes to provide adequate fuel system
lubrication.
7.6.2 Fuel Tank
The fuel tank is located directly behind the operator’s cab.
a. Fuel/Hydraulic OIl Tank Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the travel select lever in the (N) NEUTRAL
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