
112 SEBU7494-06
Maintenance Section
Engine Air Filter Primary Element - Clean/Replace
1. Open the engine
access door. Refer to Operation
and Maintenance Manual, “Access Doors and
Covers”.
2. Drain the coolant from the machine. See Operation
and Maintenance Manual, “Cooling System
Coolant (ELC
) - Change” for the procedure to
drain the cooling system.
g00943402
Illustration 114
3. Loosen the hose clamp (1) and remove the hose
from the thermostat housing assembly (2).
4. Remove the two bolts (3) from the thermostat
housing assembly. Remove the thermostat
housing assembly.
5. Remove the seal and the thermostat from the
thermostat housing assembly.
6. Install a new thermostat and a new seal. Install
the thermostat housing assembly on the engine
cylinder head.
7. Install the hose. Tighten the hose clamp.
8. Refill the cooling system. See Operation and
Maintenance Manual, “Capacities - (Refill)”. Refer
to Special Publication, SEBU6250, “Caterpillar
Machine Fluid Recommendations” for coolant
information.
9. Close the engine access door.
i019475
17
Engine A ir Filter Primary
Element
- Clean/Replace
SMCS Code: 1054-070-PY; 1054-510-PY
NOTICE
Never service the air cleaner when the engine is run-
ning, to avoid engine damage.
NOTICE
Caterpillar re
commends certified air filter cleaning ser-
vices that are available at Caterpillar dealers. The
Caterpillar cleaning process uses proven procedures
to assure cons
istent quality and sufficient filter life.
Observe the following recommendations if you at-
tempt to clean
the filter element:
Never tap or strike the filter element in order to remove
dust.
Never wash the filter element.
Use low pressure compressed air in order to remove
the dust from the filter element. Air pressure must not
exceed 206 kP
a (30 psi). Direct the air flow up the
pleats and down the pleats from the inside of the filter
element. Take extreme care in order to avoid tearing
or voiding t
he pleats.
Service the air cleaner filter elements when the yellow
piston on th
e engine air filter service indicator enters
the red zone. Refer to Operation and Maintenance
Manual, “Engine Air Filter Service Indicator - Inspect”.
g00891467
Illustration 11 5