JLG G6-42A Service Manual - Manual (Page 128)

Engine
7-12 G6-42A, G9-43A, G10-43A
1. Inspect the fuel tank thoroughly for any cracks,
slices, leaks or other damage.
2. With the fuel 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.
f. Fuel Tank Installation
1. Set fuel tank in its original orientation at the rear of
the cab.
2. Install the fuel tank hold down bar.
3. Install the fuel sender with new gasket into the fuel
tank and secure with screws. DO NOT overtighten.
4. Connect the previously labeled fuel hoses to their
appropriate locations. Secure with clamps.
5. Connect the fuel gauge harness.
6. Fill the fuel tank according to specifications.Refer to
Section 2.4, “Fluid and Lubricant Capacities.”
7. Check fuel tank for leaks.
8. Properly connect the battery.
9. Close and secure the engine cover.
10. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
7.6.3 After Fuel System Service
1. Drain and flush the fuel tank if it was contaminated.
2. Vent air from the fuel system in accordance with the
instructions found in the appropriate Operation &
Safety Manual.
3. Fill the fuel tank with fresh, clean diesel fuel as required.
7.7 ENGINE EXHAUST SYSTEM
7.7.1 Exhaust System Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the travel select lever in the (N) NEUTRAL
position, engage the parking brake, and shut the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and steering wheel.
3. Open the engine cover. Allow the system fluids and
the exhaust system to cool.
4. Properly disconnect the battery.
5. Remove the muffler heat shield (1)
6. Remove the exhaust heat shield (2).
7. Loosen and remove both clamps (3) securing the
muffler (4) to the frame mounted brackets. Remove
the muffler.
8. Loosen and remove the clamp (5) securing the
exhaust pipe (6) to the frame at the bottom rear
corner of the engine pod. Remove the exhaust pipe.
Note: Removal of the turbo charger heat shields may be
required to access exhaust pipe bolts.
9. Disconnect and remove the three bolts (7) securing
the exhaust pipe/flex pipe (8) to the turbo charger.
Remove the exhaust pipe/flex pipe from under
machine.
MY4240
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