Item 8 - Throttle and Clutch Controls
Every 200 hours (6,000 miles) lubricate the limiting speed governor speed control shaft (in-line 53) through a grease fitting
located in the end of the shaft. Use an all purpose grease (No. 2 grade) at temperatures +30°F (-1°C) and above. At
temperatures below this, use a No. 1 grade grease.
Lubricate the clutch control levers and all other control mechanisms, as required,
with engine oil.
Item 9 - Lubricating Oil Filter
Install new oil filter elements and gaskets at a maximum of 500 hours (15,000 miles) or each time the engine oil is
changed, whichever occurs first. Any deviation, such as changing filters every other oil change, should be based on a
laboratory analysis of the drained oil and the used filter elements to determine if such practice is practical for proper
protection of the engine.
Make a visual check of all lubricating oil lines for wear and chafing. If any indication of wear is evident, replace the oil lines
and correct the cause. Check for oil leaks after starting the engine.
Item 10 - Fuel Strainer and Filter
Install new elements every 300 hours (9,000 miles) or when plugging is indicated.
A method of determining when elements are plugged to the extent that they should be changed is based on the fuel
pressure at the cylinder head fuel inlet manifold and the inlet restriction at the fuel pump. In a clean system, the maximum
pump inlet restriction must not exceed 6 inches of mercury (20.3 kPa). At normal operating speeds (1800-2800 rpm), the
fuel pressure is 45 to 70 PSI (310 to 483 kPa). Change the fuel filter elements whenever the inlet restriction (suction) at
the fuel pump reaches 12 inches of mercury (41 kPa) at normal operating speeds and whenever the fuel pressure at the
inlet manifold falls to 45 PSI (310 kPa).