Illustration 64 Typical example Orientation of the DPF module

TM 9-2320-312-24-2

Truck Engine

Disassembly and Assembly Section

7. Separate filter module (3) from outlet module (4).

8. Clean the Diesel Particulate Filter (DPF) in the

following manner.

a. The Diesel Particulate Filter (DPF) can be

cleaned.

b. Perform a back pressure test in order to

determine if the DPF needs to be cleaned.

c. Refer to Operation and Maintenance Manual,

"Exhaust Particulate Filter - Test".

d. The following equipment is required to clean

g00889392

Illustration 63

the DPF: dry pressurized air supply with

690 kPa (100 psi), Air nozzle with a short

(1)

Filter module

(2)

Rubber hose

rubber hose on the end of the nozzle, and a

(3)

Air nozzle

way to collect the dust.

(4)

Inlet side

(5)

Outlet side

9. Collect the dust from Diesel Particulate Filter

(DPF) in the following manner.

e. Compressed air 690 kPa (100 psi) will be

used to blow the ash from the filter. The air

a. A filter bag is required to collect the ash from

should be dry and free from oil. Attach a

the DPF.

short rubber hose onto the end of the nozzle.

The rubber hose is used to protect the filter

b. The filter bags are available from your

module coating from being hit with the air

Caterpillar Dealer.

nozzle.

c. The filter bag will trap particles as small as

f. The air nozzle should be 12.70 mm (0.5 inch)

5 microns. A filter bag can be used 5 to 10

away from the filter. Use slow circular motions

times.

to clean the filter. Work from the center of the

filter toward the outside. Cleaning the filter

Note: Disposal of the filter bags must be in

module will require 20 to 40 minutes.

accordance with the following regulations: Federal,

State, and Local Laws.

10. Perform the cleaning of the Diesel Particulate

Filter (DPF) in the following manner.

a. Follow the recommended method for cleaning

the DPF.

b. The filter does not have labels on the inlet or

outlet ends of the filter. Mark the outside of

the filter with a marker in order to identify the

orientation of the filter. This is important due

to the installation because you will install the

filter in the opposite direction.

g00889422

Illustration 64

c. Some installations will allow only the filter

Typical example

module to be removed. The filter module is the

Orientation of the DPF module

only module that is required to be removed.

(1)

Inlet module

(2)

Catalyst module

d. Place a filter bag on the inlet side of the filter

(3)

Filter module

module.

(4)

Outlet module

(5)

Test location

(6)

Tee fitting

(7)

Copper tubing

(8)

Thermocouple