
136
Maintenance Section (D6T LGP (OEM)) WEBM1000
Diesel Particulate Filter - Clean/Replace
2. Loosen the hose clamp and remove the hose
from the elbow. Disconnect the hose assembly
from the thermostat housing assembly.
3. Re
move the bolts from the elbow. Remove the
elbow
and the thermostat housing assembly.
4. Remove the gaskets, the thermostat, and the
seal
from the thermostat housing.
NOTICE
Since Caterpillar engines incorporate a shunt design
cooling system
, it is mandatory to always operate the
engine with a thermostat.
Depending on load, failure to operate with a
thermo
stat could result in either an overheating or an
overcooling condition.
NOTICE
If the thermostat is installed incorrectly,
it will cause
the engine to overheat.
5. Install a new seal in the thermostat housing.
Install the new thermostat and the new gasket.
Install the thermostat housing on the engine
cylinder head.
6. I
nstall the elbow and the hose. Tighten the hose
clamp
.
7. Close the right engine compartment.
8. Replace the coolant that was drained from the
system.
Refer to Operation and Maintenance
Manual, “Capacities (Refill)”.
Diesel Particulate Filter -
Clean/Replace
Consult your Cat dealer when the DPF needs to be
cleaned.
The approved Caterpillar DPF maintenance
procedur
e requires that one of the following actions
be taken when the DPF needs to be cleaned:
• The DPF from your machine can be replaced with
a ne
w DPF
• T
he DPF from your machine can be replaced with
a remanu
factured DPF
• The DPF from your machine can be cleaned by
your local authorized Cat dealer
, or a Caterpillar
approved DPF cleaning machine, and reinstalled
Note: I
n order to maintain emissions
document
ation, the DPF that is removed from the
machine when the DPF is cleaned must be
reinstalled on the same machine.
Note: A
specific ash service regeneration must be
perfor
med before removing a DPF that will be
cleaned. All three scenarios listed above require a
reset of the ash monitoring system in the engine
ECM.
Engine Air Filter Primary and/
or Secondary Element - Clean/
Replace
Primary Filter
NOTICE
Service the primary filter element only when the alert
indicator
for the intake air filter is flashing. Do not
open the filter compartment unless it is time for
service. Opening the filter compartment can cause
dirt to get into the clean side of the filter housing.
NOTICE
Extremely short air filter life can result if the
pr
ecleaner system malfunctions. If air filter life is
drastically reduced from typical for the operating
conditions, consult your Caterpillar Dealer. The
exhaust system dust ejector for the strata tube
precleaner must pull a minimum vacuum of 508 mm
(20 inch) of water.
NOTICE
Service the engine air filters with the engine stopped.
Engine damage could result.
NOTICE
Do not use the filter for longer than one year.
168
Illustration 168