Manitowoc 777 Service And Maintenance Manual

Reference Only
POWER TRAIN 777 SERVICE MANUAL
7-4 Published 10-01-2012, Control # 045-08
ENGINE AIR CLEANER MAINTENANCE
Servicing the engine air cleaner is an important maintenance
function:
• A clogged air cleaner filter will prevent adequate air flow
to the engine, resulting in poor starting and increased
exhaust emissions.
• An improperly installed or damaged air cleaner can
allow dirty air to be drawn directly into the engine.
Either condition can result in engine damage.
Mounting
The air cleaner is mounted horizontally and fastened to the
engine air intake manifold with rubber elbows and metal
tubes (Figure 7-2).
Inspection
To maintain engine protection and filter service life, inspect
the following areas at regular intervals:
1. Check the service indicator (Figure 7-2) daily with the
engine running.
The indicator gives a visual signal when it is time to
replace the filter.
The red flag in the indicator window rises as the filter fills
with dirt. Replace filter when red flag locks in place at
top of indicator.
When locked in place, the red flag will remain up after
the engine is stopped. When the filter is replaced, push
the button in on the indicator to reset it.
2. Inspect the rubber fittings and the tubes between the air
cleaner and the engine for cracks or other damage
which might allow unfiltered air to enter the engine.
Replace damaged or worn parts.
3. Check the filter body for dents or other damage that may
allow unfiltered air to enter the engine. Replace the filter
if damaged.
4. Check for loose tubing clamps, flange bolts, filter straps,
and clamping brackets. Tighten loose parts.
5. Check that the inlet cap or pre-cleaner is free of
obstructions.
6. If crane has a pre-cleaner, check that discharge hole is
open.
Service
See Figure 7-2 for following procedure.
1. Loosen the clamp securing the air inlet cap or pre-
cleaner and pull it off.
2. Inspect the air inlet cap or pre-cleaner for dirt and
obstructions. Install a new inlet cap or pre-cleaner if it is
damaged.
3. Wash the air inlet cap or pre-cleaner in warm soap and
water and blow it dry with compressed air.
4. Remove the four bolts securing the cover to the engine
enclosure and lift it off.
5. Loosen the clamp securing the rubber elbow to the air
cleaner.
6. While holding the air cleaner, open the clamps securing
it to the engine enclosure.
7. Remove and discard the old air cleaner. Do not reuse
old filter. Do not to allow foreign matter to enter
tubing or air inlet hole to the engine.
8. Slide the new filter into the rubber elbow and close/
tighten the clamps.
9. Reinstall air inlet cap or pre-cleaner and tighten its
clamp.
CAUTION
Engine Damage!
STOP ENGINE before servicing air cleaner, or unfiltered
air will be drawn directly into engine.
Do not attempt to clean and reuse old filter. Discard old
filter and install a new one.
Rubber
Elbow
Clamp
Engine Air
Intake Manifold
Air Cleaner
Service Indicator
(current production)
Clamp
Make sure discharge
hole is open.
Pre-cleaner
Inlet Cap
FIGURE 7-2
A964
Air Cleaner is Mounted Outside Engine Enclosure
Service Indicator
(past production)

Manitowoc 777 Specifications

General

Brand	Manitowoc
Model	777
Category	Construction Equipment
Language	English