Diesel Fuel; Fuel Tank - JLG sky trak mmv Service Manual

Engine: Cummins 4BTA 3.9
8.8.1

Diesel Fuel

WARNING:
ble and can cause a fire or an explosion. Keep
sparks and open flames away from the vehicle
and DO NOT use smoking materials while
refueling.
Fuel represents a major portion of vehicle 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 ex-
pensive 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.
IMPORTANT: 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 injec-
tion nozzles. Use ASTM No. 2 D fuel with a minimum
Cetane rating of 40. No. 2 diesel fuel gives the best
economy and performance under most operating condi-
tions. 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 vehicle to use No. 2 D
diesel fuel, unless ambient temperatures are below 32° F
(0° C). When temperatures are below 32° F (0° C), a
blend of No. 1 D and No. 2 D fuels (known as "winterized"
No. 2 D) may be used.
Note: No. 1 D fuel may be used, however, fuel economy
will be reduced.
WARNING:
or alcohol with diesel fuel. The mixture can
cause an explosion.
Use a low-sulfur content fuel with a cloud point (the tem-
perature at which wax crystals form in diesel fuel) at least
10° below the lowest expected fuel temperature. The vis-
cosity of the fuel must be kept above 1.3 centistrokes to
provide adequate fuel system lubrication.
Note: When using diesel fuel with a sulfur content below
1.3 percent, the filter change interval must be reduced by
75 hours. The use of fuel with a sulfur content above
1.3 percent is not recommended.
8.20
Engine fuel is flamma-
DO NOT mix gasoline
Alternate Fuel Types
The vehicle is also capable of operation on alternate mil-
itary fuels including JP-5, JP-8 and Jet A-1. However, an
up to 5% reduction in engine horsepower output can be
expected when using alternate military fuels due to the
lower BTU rating of these fuels.
8.8.2

Fuel Tank

The fuel tank (1) is located directly beneath the operator's
cab.
a. Removal
The operator's cab must be partially removed in order to
remove the fuel tank. Follow the directions for removing
the operator's cab in Section 3.2.3, b. Cab Removal , then
remove the fuel tank. If a leaking fuel tank is suspected,
check that all fuel tank inlets and outlets are not the cause
of the leak before removing the fuel tank from the vehicle.
b. Disassembly
1. Disconnect the fuel level gauge wire from the fuel
tank. Remove the five pan-head screws (9 and 10),
and lockwashers (11 and 18) securing the fuel
sender cover (12) and fuel sender with gasket (2) to
the fuel tank (1).
2. Remove the square-head pipe plug (13), the hose
connector (14), the hose elbow (15) and both hose
barb elbows (16 and 17).
c. Cleaning and Drying
If contaminated fuel or foreign material is in the tank, the
tank can usually be cleaned. Replace a leaking or
damaged tank. DO NOT attempt to repair, plug or patch
a leaking or damaged fuel tank. The tank is manufactured
using an injection molding process and cannot be
repaired. If a leak is detected at any of the grommets on
the tank, replace both the grommet and fitting.
Contact JLG Inc. directly at: Domestic: 1-717-485-5161
International: 1-877-554-5438
Model MMV Rev. 12/04