Gravely 991001-008, Service Manual

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5.2 CHECKING ENGINE OIL
Check the engine oil BEFORE EACH USE OR TWICE
DAILY ON COMMERCIAL USE as follows.
5.3 CHANGING OIL FILTER
Some engines are equipped with an oil filter. Replace
the oil filter every other oil change. See engine
manufacturers manual for proper intervals and oil type.
5.4 AIR CLEANER
This engine is equipped with a replaceable, high
density paper air cleaner element. Some engines are
also equipped with an oiled, foam precleaner which
surrounds the paper element.
5.5 CHECK SPARK PLUG
Every 100 hours or operation, remove the spark plugs,
check condition, and reset gaps or replace with new
plugs as necessary.
1. Before removing spark plugs, clean the area
around base of plugs to keep dirt and debris out of
the engine.
2. Remove plugs and check condition. Replace plugs
if worn or reuse is questionable.
NOTE: Do not clean the spark plug in a machine using
abrasive grit. Some grit could remain in the spark plug
and enter the engine causing extensive wear and dam-
age.
5.6 ENGINE REMOVAL AND
INSTALLATION
1. Remove the battery cover and disconnect battery
cables. Remove negative cable first. Remove the
battery.
2. Turn off fuel at fuel tank shut-off valve and
disconnect the fuel line at the engine filter.
3. Disconnect the choke and throttle cables.
4. Disconnect the wiring harness at engine, starter
cable, battery ground cable, engine ground wires,
and oil sensor wire.
NOTE: After disconnecting the engine ground and bat-
tery ground, replace the lift bracket to hoist the engine.
5. Loosen the tension on the PTO clutch and hydro
pump belts and remove belts from the engine
sheaves.
6. Disconnect the hydraulic cooler bracket from the
frame and hang over the right wheel. Take care not
to damage the cooling fins.
7. Lift engine out.
8. The engine is replaced in reverse order.