Manitowoc 999, Service And Maintenance Manual

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Reference
Only
Manitowoc
Published 05-16-17, Control # 233-03
7-7
999 SERVICE/MAINTENANCE MANUAL POWER TRAIN
7
Daily
Check the service indicator (1) with the engine running. The
indicator gives a visual indication when it is time to replace
the filters.
The yellow flag in the indicator window extends as the filters
become plugged. Replace the filters when the yellow flag
reaches the red CHANGE zone of the indicator window.
The yellow flag remains locked in place after the engine is
stopped. The indicator reset button (2) on the end of the
indicator can be pressed at any time. When the engine is
running, the indicator will return to the proper reading.
Monthly
• Inspect the rubber elbows (7 and 10) and the tube (9)
between the air cleaner and the engine for cracks or
other damage which might allow unfiltered air to enter
the engine. Replace worn or damaged parts.
• Check the housing (3) for dents or other damage that
may allow unfiltered air to enter the engine. Replace the
housing if damaged.
• Check for loose clamps (6, 8, and 11). Tighten loose
parts as needed.
• Inspect the pre-cleaner (4) for obstructions. Clean as
required.
Changing the Filters
The air cleaner has two primary filters (12) and one
secondary filter (13).
1. Remove the service cover (5) carefully.
2. Remove the primary filters (12) gently to reduce the
amount of dust that is dislodged. There will be some
initial resistance, similar to breaking the seal on a jar.
Using the tabs on the filters, move the ends of the filters
back and forth to break the seals.
Avoid dislodging dust from filters.
NOTE The secondary (13) filter should be replaced every
third time the primary filters are replaced. Inspect
the secondary filter and replace as necessary.
3. Remove the secondary filter (13) by pulling on the
plastic ring tabs.
4. Clean the sealing surfaces in the housing.
Use a clean cloth to wipe clean the sealing surfaces and
the inside of the housing. Dust on the sealing surfaces
could render the seal ineffective and cause leakage.
Ensure all contamination is removed before the new
filters are installed.
5. Visually inspect the old filters for leaks. A streak of dust
on the clean side of filter is a telltale sign. Remove any
cause of leaks before installing the new filters.
6. Inspect the new filters, especially the sealing area.
Never install damaged filters.
7. Install a new secondary filter (13), if required, by gently
pushing it into the back of housing. Apply pressure to all
four corners and tabs to make sure the filter is
completely secure in the housing.
8. Repeat this step for the primary filters (12).
9. Install the service cover (5), making sure that the O-ring
is in place. Fasten the latches. The cover should go on
without extra force. Push the reset button (2) on the
service indicator (1).
Never use the latches on the cover to force the filters
into the air cleaner housing. It is tempting to assume the
cover will do the job of sealing the filter, but it will not.
Using the latches to push the filters into the housing
could damage the housing and will void the warranty.
WARNING
Fall Hazard!
It is necessary to climb onto the engine enclosure to
inspect and service the air cleaner.
Use the access ladder on the right side of the upperworks
to climb onto the engine enclosure.
Take every precaution to prevent falling off the crane.
CAUTION
Potential Engine Damage!
• Stop engine before servicing air cleaner. Otherwise,
unfiltered air will be drawn directly into engine. Never
operate engine without an air cleaner.
• Before servicing, clean the fittings, mounting
hardware, and the area around the component(s) to
be removed.
• Replace secondary filter as quickly as possible to
avoid engine ingestion of contaminants.
• Do not attempt to clean and reuse old filters. Discard
old filters and install new filters. Cleaning filter
elements by impact or compressed air voids the
warranty and can degrade or damage the filter media,
leading to engine damage.