ARD Nozzle - Clean The Effect of Fuel Selection on the Interval for

ARD Nozzle - Clean The Effect of Fuel Selection on the Interval for
Tech Tip
From your friends at New York Bus Sales
Product Effected –Units with CAT C7 engines and 2007 Emissions
AVOID COSTLY DOWNTIME AND UNNECESSARY REPAIR COST
SERVICE YOUR “ARD” SYSTEM AS INSTRUCYED BY CAT
YOU NEED TO FOLLOE THE STEPS BELLOW AT THE RECOMMENDED
INTERVALS!
ARD Nozzle - Clean
The Effect of Fuel Selection on the Interval for Cleaning the Nozzle
for the Aftertreatment Regeneration Device (ARD Nozzle)
Using a blend of biodiesel and ultralow sulfur diesel (ULSD) shortens the intervals between cleanings of the
ARD nozzle.
Refer to this Operation and Maintenance Manual, "Refill Capacities and Recommendations" for information
about the types of fuels that may be used in this Caterpillar On-highway Engine.
Use the following table to determine the correct interval for cleaning the ARD nozzle.
Table 1
Intervals for Cleaning the ARD Nozzle
(1)
(2)
Engine
Biodiesel Blend
C7 Engine with a
Shallow Sump
PM1: Every 17700 km (11000 miles) or 4150 L
(1100 US gal) of fuel or 250 service hours or 6
months
Every 80500 km (50000
miles) or 1500 service hours
C7 Engine with a
Deep Sump
PM1: Every 24000 km (15000 miles) or 5700 L
(1500 US gal) of fuel or 400 service hours or 6
months
Every 80500 km (50000
miles) or 1500 service hours
C9 Engine
Every 24000 km (15000 miles) or 7500 L (2000 US
gal) of fuel or 400 service hours or 6 months
(1)
(2)
ULSD
Every 80500 km (50000
miles) or 1500 service hours
Use the interval that occurs first.
An acceptable biodiesel blend must consist of at least 95 percent ULSD and five percent or less of an acceptable
biodiesel.
TECH TIP #10-0204
Page 1
Procedure for Cleaning the ARD Nozzle
The liquid cleaner that is used to clean the nozzle for the Aftertreatment Regeneration Device (ARD) is
available at your Caterpillar dealer. The cleaner is already measured into a dispenser. Contact your
authorized Caterpillar dealer for the current part number for the filled bottle.
Turn off the engine.
Use an allen wrench in order to remove the access plug from the cleaning port. Inspect the access plug for
damage. An undamaged plug may be reused.
Illustration 1
g01351823
The cleaning port is located on the left side of the engine next to the oil filler tube on the C7 Engine.
Illustration 2
g01351825
The cleaning port is located on the left side of the engine to the left of the fuel filter on the C9 Engine. The priming pump that is
shown is optional.
TECH TIP #10-0204
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Note: Remove the red cap from the dispenser immediately before use. Ensure that no debris is present on the
dispenser. Make sure that the cleaning port is free of debris.
g01348096
Illustration 3
Insert the tip of the dispenser completely into the cleaning port.
Illustration 4
g01346064
Squeeze the container in order to dispense the fluid. All of the fluid should be dispensed before the dispenser
is removed from the cleaning port. Remove the dispenser and ensure that all of the liquid was dispensed.
Inspect the cleaning port in order to ensure that no part of the dispenser remains in the cleaning port.
Insert an undamaged access plug into the cleaning port. Torque the plug to 10 ± 1 N·m (7.4 ± 0.7 lb ft). Start
the engine and run the engine for at least five minutes at low idle.
CRS NOZZLE CLEANING FLUID
Cat Regeneration System Nozzle Cleaner for new Cat OnHighway Truck Engines comes packaged in a convenient
dispenser for easy “no mess, no waste” use.
Benefits:
• Maintains peak performance – Helps extend life
and reduce maintenance costs for Cat
Regeneration Systems.
• No spills – Convenient dispenser filled with
pre-measured cleaner makes injection into CRS
nozzle port fast and simple.
• Works fast – Cleans the entire regeneration system
within 10 minutes.
TECH TIP #10-0204
Page 3
ARD Spark Plug - Inspect/Replace
Removing the Spark Plug
NOTICE
If the engine is running or the key is in the ON position the ARD plug
will continue to fire. Turn the key to the OFF position before servicing
the ARD plug.
g01308813
Illustration 1
(1) Wiring harness
(2) Spark plug
1. Remove wire harness (1) from spark plug (2) .
Personal injury can result from air pressure.
Personal injury can result without following proper procedure. When
using pressure air, wear a protective face shield and protective clothing.
The maximum air pressure for cleaning purposes must be reduced to
205 kPa (30 psi) when the air nozzle is deadheaded.
TECH TIP #10-0204
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2. Debris may have collected in the spark plug well. Thoroughly remove any debris. Use compressed
air. The maximum air pressure for cleaning purposes must be below 205 kPa (30 psi). Ensure that the
area around the spark plug is clean and free of dirt and debris.
3. Use a deep well socket and a breaker bar to loosen the spark plug. If necessary, see your Caterpillar
dealer for the part number of the socket. After the spark plug has been loosened, use the socket to
remove the spark plug by hand in order to detect problems with the threads. After the spark plug has
been removed, inspect the used spark plug and the gasket.
If the spark plug could not be removed by hand, clean the threads with a 305-2389 brush . This tool scrapes
debris from the seat and from the threads.
NOTICE
Do not use a thread tap. A thread tap will remove metal unnecessarily.
The threads could be stripped and the combustion group could be
damaged.
Inspecting the Spark Plug
Inspect the spark plug closely for damage. The condition of the spark plug can indicate the operating
condition of the engine.
The terminal post must not move. If the terminal post can be moved by hand, discard the spark plug.
Inspect the insulator for cracks. If a crack is found, discard the spark plug.
Inspect the shell for damage. Cracks can be caused by overtightening the spark plug. Overtightening can also
loosen the shell. Discard any spark plug that has a shell that is cracked or loose.
Inspect the electrode for excessive wear.
Installing the Spark Plug
Note: Do not use anti-seize compound on the spark plug. Most of the heat is transferred through the
threads and the seat area of the spark plug. Contact of the metal surfaces must be maintained in order
to provide the heat transfer that is required.
1. Ensure that the spark plug is clean and free of dirt and oil.
NOTICE
Do not overtighten the spark plug. The shell can be cracked and the
gasket can be deformed. The metal can deform and the gasket can be
damaged. The shell can be stretched. This will loosen the seal that is
between the shell and the insulator, allowing combustion pressure to
blow past the seal. Serious damage to the engine can occur.
Use the proper torque.
TECH TIP #10-0204
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2. Install the spark plug by hand until the spark plug contacts the ARD. Torque the spark plug to the
proper specification. Refer to Specifications, "Spark Plug" for the proper torque specification.
3. Connect the wiring harness.
Contact Our Service Department With Any Questions
CHITTENANGO – phone 800-962-5768 or
Daryl Wallace : dwallace@newyorkbussales.com
Brian Lamaitis : blamaitis@newyorkbussales.com
ROCHESTER – phone 800-463-3232 or
Gary Chichester: gchichester@newyorkbussales.com
ALBANY – phone 866-867-1100 or
Ben Reiling: breiling@newyorkbussales.com
Steve Searles: ssearles@newyorkbussales.com
WARRANTY – 800-962-5768 ext 237
Morgan Jenkins: mjenkins@newyorkbussales.com
ALL of our Tech Tips can be found on the New York Bus Sales website at
http://www.newyorkbussales.com/pages/bulletins.cfm
Or at the New York Head Mechanic website at
http://www.nyhma.org/viewforum.php?f=2&start=0
TECH TIP #10-0204
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TECH TIP #10-0204
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