Any deviation, such as changing filters every other oil
change, should be based on a laboratory analysis of the
replacement of the cover gaskets must also be done per
drained oil and the used filter elements to determine if
the manufacturer's recommendations.
such practice is practical for proper protection of the
Item 7 - Drive Belts
New standard V-belts will stretch after the first few hours
Make a visual check of all lubricating oil lines for wear
of operation. Run the engine for 15 seconds to seat the
and chafing. If any indication of wear is evident, replace
belts, then readjust the tension. Check the belts and
the oil lines and correct the cause.
tighten the fan drive, battery-charging alternator drive
belts after 1/2 hour and again after 8 hours of operation.
Check for oil leaks after starting the engine.
Thereafter, check the tension of the drive belts every
200 hours and adjust, if necessary. Too tight a belt is
destructive to the bearings of the driven part; a loose
Item 10 - Fuel Strainer and Filter
Install new elements every 6 months or when plugging is
belt will slip.
Replace all belts in a set when one is worn. Single belts
A method of determining when elements are plugged to
of similar size should not be used as a substitute for a
the extent that they should be changed is based on the
matched belt set; premature belt wear can result
fuel pressure at the cylinder head fuel inlet manifold and
because of belt length variation. All belts in a matched
the inlet restriction at the fuel pump. In a clean system,
belt set are within .032" of their specified center
the maximum pump inlet restriction must not exceed 6
inches of mercury (20.3 kPa). At normal operating
speeds (1600-2100 rpm). the fuel pressure is 45 to 70
Adjust the belt tension so that a firm push with the
psi (310 to 483 kPa). Change the fuel filter elements
thumb. at a point midway between the two pulleys, will
whenever the inlet restriction at the fuel pump reaches
depress the belt 1/2" to 3/4".
12 inches of mercury (41 kPa) at normal operating
speeds and whenever the fuel pressure at the inlet
Item 8 - Throttle and Clutch Controls
manifold falls to 45 psi (310 kPa).
Lubricate the clutch control levers and all other control
mechanisms, as required, with engine oil.
Item 11 - Starting Motor
The electrical starting motor is lubricated at the original
Item 9 - Lubricating Oil Filter
time of assembly. The starting motor (except the sprag
Install a new oil filter at a maximum of 500 hours or
clutch drive) does not require lubrication except during
each time the engine oil is changed, whichever occurs