SkyTrak 6036 Service Manual - Manual (Page 136)

Section 8B Cummins Engine
8B-16 Model 6036/6036T S/N 9B0500 thru 14833
Do not mix gasoline or alcohol with diesel fuel.
This mixture can cause an explosion.
5. Assemble the removed parts in the reverse
order of removal. Make sure the gasket is
aligned with the capscrew holes.
6. Install the capscrews and use your fingers to
tighten.
6. Tighten all the capscrews and torque to
18 lb-ft (24 Nm).
7. Position the alternator and install the mounting
capscrew, torque to 32 lb-ft (43 Nm).
8. Tighten the link capscrew and torque to
18 lb-ft (24 Nm).
9. Install the drive belt.
10. Fill the cooling system, refer to paragraph
8B.7.7. Operate the engine and check for
leaks.
11. Vent the engine and the aftercooler.
8B.10 ENGINE ELECTRICAL
SYSTEM
The engine electrical system is described in
Section 10, Electrical System. These instructions
describe warning devices, wiring harnesses, circuit
breakers, the starting and charging circuits,
switches and solenoids, gauges and indicator
lights, and electrical troubleshooting.
8B.11 ENGINE FUEL SYSTEM
The engine fuel system includes a fuel tank (1, Fig.
8B.39), a fuel level sender (2) and gauge, a fuel
pre-filter (10), a fuel injection pump, Fig. 8B.18, two
fuel filters (17, 18 Fig. 8B.39), and fuel lines to and
from the fuel injection pump, and fuel lines from the
fuel injection pump to and from the fuel injectors
back to the fuel filter and fuel tank.
The threaded fuel fill opening in the top of the fuel
tank has a filler cap with a tether (3, Fig. 8B.39). A
fuel level sender (2) and gauge are described in
Section 10, Electrical System.
A fuel supply hose carries fuel from the bottom of
the tank to the fuel pre-filter (10). The fuel then
flows through a fuel filter tube, a hose and a fuel
pump tube to the fuel lift pump, Fig. 8B.40, which is
located on the left side of the engine.
A tube carries fuel under pressure from the fuel lift
pump to fuel filter. Fuel which has been filtered by
the fuel filter is directed through tubes to the fuel
injection pump.
A tube from the fuel injection pump returns surplus
fuel to the fuel filters for recirculation back to the
fuel injection pump.
A tube from the fuel injectors returns surplus fuel
from the injectors to the fuel filters and into a line
and hose which returns it to the fuel tank.
8B.11.1 Type of Diesel Fuel to Use
Fuel represents a major portion of your forklift
operating costs; therefore, it is important to use it
efficiently. Don’t let cost tempt you to use inferior
diesel fuel. The initial savings is a false economy
when you consider the damage poor fuel can do to
your forklift engine.
NOTE: Use only diesel fuel designed for diesel
engines. Some heating fuels contain harmful
chemicals which can seriously affect engine
efficiency and performance.
IMPORTANT: Due to the precise tolerances of
diesel injection systems, it is extremely important
that the fuel be kept clean and free of dirt or water.
Dirt or water in the 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
number of 40. No. 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 ex-
tremely low ambient temperatures to prevent
misfires and excessive smoke.
When operating in temperatures above 32 °F
(0 °C), use diesel fuel No. 2 D with a minimum
cetane rating of 40. When operating in tempera-
tures below 32 °F (0 °C) use a blend of No. 1 D
and No. 2 D fuels, also known as “winterized” No.
2 D.
NOTE: No. 1 D fuel can be used, however, fuel
economy will suffer.
Warning
Use low sulfur content fuel having a cloud point
that is at least 10 degrees below the lowest
expected fuel temperature. Cloud point is the
temperature at which wax crystals begin to form in
diesel fuel.
The viscosity of the fuel must be kept above 1.3
centistrokes to provide adequate fuel system
lubrication.