Hour Intervals - JLG Skytrak 6036 Service Manual

Section 8. Engine
Fig. 8.11 Vent Screws in Injection Pump
1. Unlock and open the right rear engine access
door. Loosen the governor vent screw in the
fuel injection pump governor control cover,
Fig. 8.11.
2. Loosen the injection pump vent screw on the
side of the fuel injection pump.
FUEL LIFT PUMP
PRIMING LEVER
Fig. 8.12 Priming Lever
3. Unlock and open the left rear engine access
door. Operate the priming lever on the fuel lift
pump, Fig. 8.12, until fuel, free of air, comes
from both vents.
NOTE: If the fuel lift pump cam is on maximum lift,
it will not be possible to operate the priming lever.
The engine should be turned over momentarily to
reposition the lift pump cam.
4. Continue to pump fuel and close the vents in
the following order:
• Injection pump vent screw
• Governor vent screw
8-6
GOVERNOR
VENT SCREW
INJECTION
PUMP VENT
SCREW
OA0322
OA0332
INJECTOR HIGH PRESSURE
LINE FITTINGS
Fig. 8.13 Injector High Pressure Line Fittings
5. Loosen any two high pressure fittings, Fig.
8.13, that come from the fuel injection pump.
Loosen these fittings at the base of the
injectors. Also loosen the fitting of the Thermo
Start fuel line in the intake manifold, Fig. 8.14.
THERMO START
FUEL LINE
FITTING
INTAKE
MANIFOLD
Fig. 8.14 Thermo Start Fuel Line Fitting
6. Turn the ignition key to the START position
and operate the starter until fuel, free from air,
comes from the injector and Thermo Start fuel
line fittings. Turn ignition switch OFF. Tighten
all fittings.
7. Close and lock both access doors. The
engine is now ready to start.
If the engine runs correctly for a short time and
then stops or runs roughly, check for air in the fuel
system. If there is air in the fuel system, there is
probably a leak in the low pressure system.

8.1.6 1,000 Hour Intervals

1. Replace fuel filter element.
2. Clean sediment chamber of fuel lift pump.
3. Clean or replace element of dry type air
cleaner, if not indicated earlier.
Model 6036 S/N 9B0499 and Before
OA0342
OA0352