SkyTrak 8042 Service Manual - Manual (Page 138)

Engine - Cummins QSB3.3T/QSB4.5T
7-6 6036, 6042, 8042, 10042, 10054
7. Remove fuel tank drain plug (5), and drain fuel into
an approved and suitable container. Dispose of fuel
properly.
8. Drain the hydraulic oil tank (6). Refer to Section
8.5.1, “Hydraulic Oil Reservoir Draining.”
9. Label, disconnect and cap the fuel and hydraulic
lines from the tank.
10. Label and disconnect the electrical components from
the fuel/hydraulic oil tank.
11. Position and connect a suitable chain support to tank
lifting point (7) and take up slack in the chain.
12. While supporting the tank, remove nuts and
lockwashers securing the tank to the machine frame.
Pull tank away from the tank carriage bolts, and
remove tank.
b. Disassembly
The fuel/hydraulic oil tank is a one-piece unit and cannot
be disassembled. The fuel level indicator and hydraulic
filters can be removed and reused on the new replacement
tank. Dispose of the old tank according to local
regulations concerning hazardous materials disposal.
c. Cleaning and Drying
If contaminated fuel or foreign material is in the tank, the
tank can usually be cleaned.
Note: If a leak is suspected in the fuel tank, contact your
local authorized Service Department.
To clean the fuel tank:
1. Have a dry chemical (Class B) fire extinguisher near
the work area.
2. Depending on which side of the tank is contaminated
(fuel or hydraulic oil), remove the fuel or oil tank
drain plug, and safely drain any fuel or hydraulic oil
into a suitable container. Dispose of fuel or hydraulic
oil properly.
3. Clean the fuel/hydraulic oil tank with a high pressure
washer, or flush the tank with hot water for five
minutes and drain the water. Dispose of
contaminated water properly.
4. For the fuel tank side, add a diesel fuel emulsifying
agent to the tank. Refer to manufacturer’s
instructions for the correct emulsifying agent-to-
water mixture ratio. Refill the tank with water, and
agitate mixture for 10 minutes. Drain the tank
completely. Dispose of contaminated water properly.
5. Refill the fuel tank with water until it overflows.
Completely flush the tank with water. Empty the fuel
tank, and allow it to dry completely.
d. Assembly
The fuel/hydraulic oil tank is a one piece-unit and cannot be
disassembled. The fuel level indicator and hydraulic filters
can be removed and reused on the new replacement tank.
Dispose of the old tank according to local regulations
concerning hazardous materials disposal regulations.
e. Inspection
Note: If a leak is suspected in the fuel tank, contact your
local authorized Service Department.
1. Inspect the tank thoroughly for any cracks, slices,
leaks or other damage.
2. With the tank removed from the machine, plug all
openings except one elbow fitting. Install the elbow
fitting, and apply approximately 1-1.5 psi
(7-10 kPa) of air pressure through the elbow. Check
the reservoir for leaks by applying a soap solution to
the exterior and look for bubbles to appear at the
cracked or damaged area.
MAQ0330
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