Exmark Turf ranger Operator's Manual page 31

h) Insert the second (1) bearing, (1) new seal, and (1) bearing spacer.
i) Put wheel and tire assembly on the unit and adjust by tightening the nyloc
nut until wheel will not turn freely. Back nut off 1/6 of a turn so the wheel
will just turn with a slight amount of drag.
IMPORTANT: To prevent seal and bearing damage, check the bearing
adjustment often. Spin the caster tire. The tire should not spin freely
(more than 1 to revolution) or have any side play. If the wheel spins freely
adjust per step i).
6.1.15 Remove engine shrouds and clean cooling fins:
Service Interval: See Engine Owner's Manual
a) Stop engine, wait for all moving parts to stop, and remove key.
b) Remove cooling shrouds (or cooling shroud cleanout covers for S/N
320,000 and higher) from engine and clean cooling fins. Also clean dust,
dirt, and oil from external surfaces of engine, which can cause improper
cooling.
c) Make sure cooling shrouds or cooling shroud cleanout covers are properly
reinstalled. Operating the engine without cooling shrouds or cooling shroud
cleanout covers will cause engine damage due to overheating.
6.1.16 Change fuel filter:
Service Interval: As Required
a) A fuel filter is installed in the fuel line between the fuel tank and the engine.
Replace with Kohler P/N 2405002 when necessary.
6.1.17 Lubrication of steering yoke pivot:
Service Interval: Monthly
a) The steering yoke pivot is permanently sealed and should require no additional
lubrication. If there is evidence of seal leakage, replace the seals or bearings
and fill with SAE No. 2 multi-purpose grease or wheel bearing grease.
6.1.18 Check spark plugs.
Service Interval: 160 hrs.
a) Remove spark plugs, check condition and adjust plug gap, or replace with
new plugs. See Engine Owners Manual.
6.1.19 Change hydraulic system oil or filter:
6.1.19.1 Change hydraulic filter:
Service Interval: After first 250 hrs, then yearly thereafter.
a) Stop engine, wait for all moving parts to stop, and remove key.
b) Carefully clean area around filter. It is important that no dirt or
contamination enters the hydraulic system.
c) Unscrew filter and remove.
IMPORTANT: Before reinstalling new filter, fill it with Mobil 1 15W-
50 and apply a thin coat of oil on the surface of the rubber seal.
Turn filter clockwise until rubber seal contacts the filter adapter, and
then tighten the filter an additional 2/3 to 3/4 turn. Use only Exmark
(Part No. 1-513211) or Eaton (Part No. 103144) filter elements.
d) Start engine and run several minutes.
g) Check hydraulic oil level as outlined in 6.1.9.
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