JLG G12-55A AccuPlace Service Manual - Manual (Page 84)

Engine
7.6 G10-55A & G12-55A AccuPlace
b. Radiator Installation
1. Install the isolator mounts to the bottom of the
radiator. Place the radiator in the engine
compartment at its original orientation. Secure with
the previously used hardware.
Note: Ensure there is adequate clearance between the
radiator and the engine fan.
2. If necessary, install the engine fan.
3. Install the radiator fan shroud.
4. Uncap and connect the previously labeled hoses to
the radiator and oil cooler.
5. Install the coolant recovery tank. Uncap and connect
the previously removed hose.
6. Open the radiator cap 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.
7. Connect the battery negative (-) cable to the battery
negative (-) terminal.
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.
7.3 ENGINE ELECTRICAL SYSTEM
The engine electrical system, including the starter,
alternator and primary wiring, is described in Section 9.6,
“Electrical System Schematics And Diagrams.”
7.4 FUEL SYSTEM
7.4.1 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 expected fuel temperature.
The viscosity of the fuel must be kept above
1.3 centistrokes to provide adequate fuel system
lubrication.
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