Cub Cadet MTD 70 Series - Manual (Page 13)

Introduction
7
Air filter
The main function of the air filter is to trap air borne par-
ticles before they reach the carburetor that can cause cat-
astrophic internal engine damage.
Generally air filters come in two different types, a
pleated-paper element, or a foam plastic, sometimes a
combination of the two will be used like the one on the
MTD engine. See Figure 1.3.
• Air filters used on the MTD engine are designed
to prevent particles larger than 3-5 micron from
passing through into the engine.
• The filter should be checked on a regular basis
possibly several times in a season.
• Typically an air filter should be changed before
every season.
• If a foam pre-cleaner is dirty, but not in bad of
condition, it can be cleaned and reused. The
paper pleated filters can be shaken or lightly
tapped to free the debris from the filter.
NOTE: Never use compressed air on a paper air filter. Compressed air will remove the tiny fibers that are used
to catch the dirt in the air. Without these fibers the filter is useless.
• Foam pre-cleaners can be washed in warm soapy water.
NOTE: When drying a foam pre-cleaners either squeeze it inside of a paper towel or let it air dry. DO NOT
wring it. Wringing the foam pre-cleaners will cause damage to the foam.
NOTE: Always check with factory specification prior to servicing/replacing any engine components.
NOTE: Do not oil the foam pre-cleaner. The paper filer will absorb the oil and it will become plugged.
Figure 1.3
Paper-pleated element
Foam pre-cleaner