JLG Skytrak 6036 Service Manual page 91

3. Loosen drain cock on bottom of fuel pre-filter
and allow water to completely drain from it.
4. Tighten the drain cock and top bleed screw
after draining.
5. Close and lock the right rear engine access
door.
Fan Belt Tension
1. Lower carriage to ground, shut off engine, and
engage park lock.
2. Unlock and open the left rear engine access
door.
3. Inspect the fan belt. Replace a cracked or
frayed belt.
4. Check fan belt tension midway between the
crankshaft and alternator pulleys, Fig. 8.2.
Deflection should be 1/4 to 3/8" (6 to 9 mm)
with an applied force of 13 to 15 lbs. (6 to 7
kg).
5. If belt deflection exceeds the tolerance, loosen
both alternator mounting screws. Carefully pry
the alternator to tighten the belt and, at the
same time, tighten the alternator screws.
Recheck belt deflection.
6. Close and lock the left rear engine access
door.
Fig. 8.9 Fuel Filter
8.1.5 500 Hour Intervals
Fuel Filter
1. Unlock and open the right rear engine access
door.
2. Remove screw in top of the filter assembly,
Fig. 8.9.
3. Remove filter base and discard element.
4. Clean base and head.
Model 6036 S/N 9B0499 and Before
HEX
SCREW
FILTER
ELEMENT
FUEL
FILTER
BASE
DRAIN
COCK
OA0302
5. Position a new filter element between the base
and head and install and tighten screw on top
of filter assembly until snug.
6. Remove air from the fuel system. (See
paragraph 8.4.8, How to Bleed to Fuel Sys-
tem).
7. Close and lock the right rear engine access
door.
Fuel Lift Pump Sediment Chamber
1. Unlock and open the left rear engine access
door.
COVER
STRAINER
FUEL LIFT PUMP
Fig. 8.10 Fuel Lift Pump
2. Remove fuel lift pump cover and strainer, Fig.
8.10.
3. Wash any sediment from the lift pump and
clean the cover and strainer.
4. Install the cover making sure that it seats on
the pump with NO leakage.
5. Remove air from the fuel system. (See
paragraph 8.4.8, How to Bleed to Fuel Sys-
tem).
6. Close and lock the left rear engine access
door.
NOTE: Marginal fuel cleanliness conditions will
require fuel system service more frequently. Loss
of engine power is often caused by dirty fuel filters.
Bleeding Fuel System
Air must be vented from the fuel system whenever
any part of the system between the fuel tank and
injection pump has been disconnected for any
reason, or when the system has been emptied of
fuel.
IMPORTANT: DO NOT start the engine until the
injection pump has been filled and primed as the
pump can be seriously damaged due to lack of
lubrication.
Remove air from the fuel system as follows:
NOTE: More than one person may be required to
perform this procedure.
Section 8. Engine
OA0312
8-5