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How to Select Your Retrofit
Spiracle™ Crankcase
Filtration System (CFS)
S040005
S040004
All diesel engines produce crankcase blow-by gases
and particulate matter. The Spiracle crankcase
filtration system is designed to efficiently eliminate
these blow-by emissions. Because blow-by rates
vary, it's necessary to select the proper Spiracle
model based on the maximum blow-by flow
produced by the engine. Donaldson recommends
measuring your engine's blow-by flow before
selecting the applicable Spiracle model.
Measure engine crankcase blow-by flow
Donaldson has developed a procedure to measure the crankcase flow rate on
your engine. The procedure will take approximately 25 minutes (10 minutes
to install the flow tube and another 10-15 minutes to perform the test). The
test can be performed on a chassis dynamometer or on the road. The test
procedure on the reverse side.
Blow-by flow changes as a diesel engine ages.
Make sure you know your engine's blow-by flow rate! Most engine
manufacturers recommend that the blow-by flow be measured annually. If
the flow measurement is out of spec(1), it's an indication of engine wear or
another engine performance problem. Problems should be repaired and the
blow-by flow retested before installing a crankcase filtration system.
Required tools for blow-by flow test
1. Blow-by flow tool (Donaldson or OE tools)
2. Digital Manometer (optional if testing on dynamometer)
Must have a range of 0-20" H2O and accuracy of 0.1" H2O. Select one
with a peak "hold" function to record the maximum pressure. (Example:
shown on right - model HHP680 from www.omega.com)
3. One hose clamp (3/4-1-1/4" dia.).
Description
Selection Chart
----------- Diesel Engine Application ---------less than 400 HP(2)
greater than 400 HP (2)
Blow-by Flow Rate
0 -11 cfm
9 - 24 cfm
Spiracle Model S040004
S040005
Replacement Filter
P603746
P603568
Filter Change Interval Every lube oil change or 500 hours, which every comes first.
Procedure to Measure Engine Crankcase Blow-by Flow
Test Procedure
1. Install the blow-by flow tool
Using the appropriate tool for your engine, insert the tool to
the end of the draft tube or to the disconnected Spiracle inlet
hose and secure with a hose clamp. The draft tube is the tube
that vents the crankcase fumes away from the engine. Insure
that the engine breather tube is free of dirt and the valve
cover/intake manifold is tight.
2. Measure the pressure drop.
Connect the pressure measurement device to the barbed
fitting on the tool. Set the measurement device to read in
inches of water, at the peak reading. Temporarily attached
the device under hood with zip ties and away from any
moving engine components.
3. Run engine under full load and normal operating
conditions. (3)
Note: Insure the engine oil is at correct level and the
dipstick is in place.
The peak pressure must be obtained while the engine is
under full load and normal operating temperatures. This
can be done in one of two ways: (1) run on a chassis
dynamometer, or (2) from an actual on-road test. If you
select the on-road test, the peak pressure must be read and
recorded while at the engine's maximum power; typically by
accelerating from a stoplight or going up an incline.
4. Convert peak pressure into crankcase flow
rate (cfm).
Use the conversion table to determine your engine's
maximum blow-by flow and select the appropriate Spiracle
CFS model from the table on the right.
5. Remove the tools and clean off any contaminant from
the tube.
If a Spiracle CFS is installed, reconnect the inlet hose and
tighten clamp.
Recommended Test Interval
Measure crankcase flow annually to verify the engine
remains in spec with engine manufacturer's limits.
(1) See dealer or engine owner's manual for more information
(2) HP rating given as an approximation for Spiracle CFS sizing. Select via blow-by flow measurements. Test once per year. (3) Full load reading to be achieved by accelerating the vehicle from a standing start to 35 mph, using full throttle. High idle to be achieved at maximum governed engine speed
Blow-by Flow Conversion (Pressure to Airflow) Chart
for Donaldson tools P229117 and P229118
P229118
For engines 400 HP and greater, use P229118
tool (fits 1" or 1-1/4" draft tubes.) If your reading
is below the orange line, use S040005. If the
reading falls above the orange line, do not apply
a Spiracle CFS.,
Airflow (cfm)
Tool P229118
P229117
Tool P229117
Tap Pressure (in inches H2O)
How to Select a Retrofit Spiracle CFS
For engines less than 400 HP, use the P229117
tool (fits 3/4", 1" or 1-1/4" draft tubes). If your
reading is below the top red line, use S040004 If your reading falls above the red line, contact
Donaldson emissions engineering.
Conversion Charts for Non-Donaldson Tools
After performing the blow-by test in accordance with the tool manufacturer’s testing procedure, use these charts to
convert the blow-by flow pressure number (in H20) to an airflow rating (cfm). Use the Spiracle Selection Chart on
the first page to select the proper Spiracle CFS model for your retrofit. If the OEM engine tools are not available,
Donaldson recommends using one of our flow tools to determine the engine blow-by flow.
International ZTSE-4039 Tool Blow-by Pressure Results
Pressure Results using International ZTSE-4039 Tool
OE maximum pressure = 6”H2OBlow-by
for T444
and 8”H2O for DT466
9
Airflow
(scfm)
Airflow
(cfm)
8
7
6
5
Top: Cummins 3822476; Middle: Cummins
3822566; Bottom: International ZTSE-4039
(These tools are not available from
Donaldson)
4
3
1
2
3
4
5
6
7
8
9
10
Tap Pressure
in inches
Tap Pressure
(in inches
H2H2O
O)
If your engine blow-by test results
International
fall OUTSIDE of the your OE
manufacturer's maximum pressure
Cummins 3822476 Tool (small engine) Blow-by Pressure Results
Flow Pressure Results with Cummins Tool 3822476
OE maximum pressure = 18”H2Blow-by
O for B-Series
Engines
limits, it's an indication that the
6
engine is not in good condition and
should be repaired or rebuilt to bring
5
the pressure ratings back into OE
4
Airflow
(scfm)
Airflow
(cfm)
manufacturers limits.
3
The charts shown on the this page
2
are results of tests conducted by
1
Donaldson and should be used as a
0
0
2
4
6
8
10
12
14
16
18
20
22
guide.
Tap Pressure in inches H2O
Tap Pressure
(in inches H2O)
Cummins small
Service Tip!
The Spiracle™ filter
must be changed
at every oil filter
change or up to 500
hours of operation
- whichever comes
first!
Cummins 3822566 Tool (large engine) Blow-by Pressure Results
OE maximum pressure = 18”H2O Blow-by
for ISC,Pressure
NH, N14,
V903,
L10, M11
and Tool
V378s
Results
from Cummins
3822566
10
9
Airflow
(scfm)
Airflow
(cfm)
8
7
6
5
4
3
2
0
2
4
6
8
Tap
10
12
14
16
Tap Pressure
H2OH
Pressure
(inin inches
inches
Cummins large
18
20
22
24
O)
2
How to Select a Retrofit Spiracle CFS Donaldson Company, Inc.
Minneapolis, MN
55440-1299
www.donaldson.com
Brochure No. F111197 (3/07)
© 2006-2007 Donaldson Company, Inc.
Printed in the U.S.A.
Donaldson Company, Inc. reserves the
right to change or discontinue any model or
specification at any time and without notice.
North & South America
866-675-2847