Walker B18 Operator'S Manual Download

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Maintenance Instructions

CLEANING

Inspect the paper element

after

every 100 hours

service and

replace

the element and safety filter

400 hours

(or when dirty or damaged). More fre-

quent replacement may be required when operating
in extremely dusty conditions as indicated by the air
filter restriction gauge. Service the air cleaner as
follows:

1. Lift Mono Latch Twist Lock™ and twist the

OptiAir™ cover to the left into the “open” posi-
tion to remove the air cleaner cover. Wash the
cover and dust ejection valve. Check that these
components are in good condition. The dust
ejection valve is subject to wear and deteriora-
tion and should be inspected carefully and re-
placed every

2 years

or when damaged. The

lips of the valve should close and fit together;
any cracks, deformation, or wear in the valve is
cause for replacement.

2. Remove the filter element by pulling it out of the

canister. There will be some initial resistance
as the filter seal breaks loose and slides off of
the outlet tube.

Gently

move the end of the

filter up and down and side to side or twist to
loosen the seal. Use gentle action to minimize
the amount of dust dislodged as the filter is re-
moved.

3. Discard the filter element if excessive air flow

restriction has been indicated by the air filter
restriction gauge and proceed to Step 6. Clean
the filter element by

gently tapping

on a

flat,

hard surface.

If excessive restriction still exists

after cleaning the element, it should be re-
placed.

NOTE:

Use care when cleaning the filter ele-

ment. The filter element and/or seal surface
may be damaged by tapping too hard or hitting
on an uneven surface or sharp edge. Washing
the element in water or cleaning solution is

not

recommended.

Do not try to clean the element

with compressed air. Remember replacing a fil-
ter is less expensive than replacing a dusted
engine.

4. Use a bright light inside the element to inspect

for damage. Check the element very carefully
for

pin holes or other damage

that will allow

dirt to leak through the paper media. Replace
element if necessary.

5. Check the condition and resilience of the radial

sealing surface (inside of the open end) of the
filter. Replace the filter if any cracks, tears, or
other damage to the sealing surface are noted.

6. Without removing, visually inspect the condition

of the safety filter for damage or holes. The
safety filter should only be removed for replace-
ment every

400 hours

(or when dirty or dam-

aged).

IMPORTANT:

Prior to removing the safety filter,

make sure the inside surface of the air cleaner
canister is clean. This will minimize the risk of
dirt entering the outlet tube which can cause pre-
mature engine wear.

7. After removing the safety filter, use a clean,

damp cloth and wipe the interior of the air clean-
er canister clean. Use special care to clean

both the inside and outside

surfaces of the

outlet tube.

IMPORTANT:

Any dust left on the inside of the

outlet tube will go into the engine and cause
wear.

8. Check the outside surface of the outlet tube for

smoothness and cleanness (this is the sealing
surface).

9. Insert and seat the safety filter and OptiAir™

el ement carefully into the canister, applying
pres sure at the outer rim of the filter; not at the
flexible center. Make sure the filter element is
completely in place before installing the cover.

NOTE: DO NOT

use petroleum based lubri-

cants on the sealing surfaces of the filter; use
tal cum powder or dry silicone lubricants if re-
quired for filter installation.

OptiAir™

Filter Element

Radial Sealing

Surface

Canister

Safety Filter

Air Filter Element Replacement