Figure 3-6. Chain case fill cap and breather service.
engine (para 2-11) and check oil level. Add oil when
(6) Position filter element in housing; position
necessary.
spring on filter element; position new gasket on cover,
g.
Engine Oil Strainer Service (Model 687C18-ES
then place cover on housing and secure with two
Only).
lockwashers and nuts.
(1) Remove drain plug (fig. 3-5) and drain oil
h. Chain Case Fill Cap and Breather Service.
strainer.
(1) Refer to LO 5-3810-206-12 for interval,
(2) Remove two nuts, lockwashers, and
then remove fill cap (fig. 3-6), wash in an approved
cover.
cleaning solvent, and dry thoroughly with low pressure
(3) Remove cover gasket and the element
compressed air.
spring, then lift filter element from housing. Discard
(2) Inspect breather portion of fill cap for
cover gasket.
damage to filter screen wire, and assure removal of all
(4) Clean all parts in an approved cleaning
foreign matter.
solvent and dry thoroughly.
(3) Replace a defective fill cap breather.
(5) Visually inspect element spring for break
(4) Refer to current lubrication LO 5 3810-
or other defect, such as loss of tension. Replace a
206-12 for instructions on changing of oil in chain case.
defective spring.
3-18
