JLG 4017PS Service Manual - Manual (Page 124)

Engine
7-8 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
b. Disassembly
Fuel tank is a one-piece unit and cannot be disassembled.
Fuel level indicator can be removed and reused on new
replacement tank. Dispose of old tank according to local
regulations concerning hazardous materials disposal.
c. Cleaning and Drying
If contaminated fuel or foreign material is in the tank, tank
can usually be cleaned.
To clean the fuel tank:
1. Have a dry chemical (Class B) fire extinguisher near
work area.
2. Remove the fuel or oil tank drain plug, and safely
drain any fuel into a suitable container. Dispose of
fuel properly.
3. Clean fuel tank with a high pressure washer, or flush
tank with hot water for five minutes and drain water.
Dispose of contaminated water properly.
4. Add a diesel fuel emulsifying agent to tank. Refer to
manufacturer’s instructions for correct emulsifying
agent-to-water mixture ratio. Refill tank with water,
and agitate mixture for 10 minutes. Drain tank
completely. Dispose of contaminated water properly.
5. Refill fuel tank with water until it overflows.
Completely flush tank with water. Empty fuel tank,
and allow it to dry completely.
d. Assembly
Fuel level indicator can be removed and reused on new
replacement tank. Dispose of old tank according to
local regulations concerning hazardous materials
disposal regulations.
e. Inspection
1. Inspect fuel tank thoroughly for any cracks, slices,
leaks or other damage.
2. With fuel tank removed from machine, plug all
openings except one elbow fitting. Install elbow
fitting, and apply approximately 7-10 kPa (1-1.5 psi)
of air pressure through elbow. Check reservoir
for leaks by applying a soap solution to exterior
and look for bubbles to appear at cracked or
damaged area.
f. Fuel Tank Installation
1. If necessary, install fuel tank to support bracket with
previously used hardware.
2. Using a floor jack, lift fuel tank and support bracket
to their original orientation on cab. Install with
previously used hardware. Remove floor jack.
3. Connect previously labeled fuel hoses to their
appropriate locations. Secure with clamps. Connect
fuel sender.
4. Fill fuel tank according to specifications.Refer to
Section 2.5, “Fluids, Lubricants and Capacities.”
5. Check fuel tank for leaks.
6. Install hydraulic oil reservoir. Refer to Section 8.7.3,
“Hydraulic Oil Reservoir Removal/Installation.”
7. Install lower cover of fuel tank.
8. Properly connect battery.
9. Close and secure engine cover.
10. Remove Do Not Operate Tag from ignition key
switch and steering wheel.
7.6.3 After Fuel System Service
1. Drain and flush the fuel tank if it was contaminated.
2. Vent air from fuel system in accordance with
instructions found in the appropriate Engine
Operation & Safety Manual.
3. Fill the fuel tank with fresh, clean diesel fuel as required.