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Oil Drain Line (On models which have an
external drain - see compressor illustration
on front)
A. Check for contamination or restrictions. The drain line must
be 1/2 inch ID Minimum from the compressor to the engine
crankcase. The line should have no bends less than a two inch
radius, be free of traps, have a continuous downward flow and
enter the engine above the engine oil level. The compressor
drain should not be connected to any other oil drains which could
restrict the flow of oil out of the compressor. Check the mating
oil drain hole in the engine flange for contamination or restrictions
on internally drained models.
Compressor Mounting Surface
A. Clean the mounting surface. Use the gasket provided with
the replacement compressor. Use gasket sealant sparingly.
Care should be taken so no gasket sealant plugs the oil entry or
oil drain.
NOTE: Excessive gasket sealant which plugs or restricts either
the oil feed or drain voids any warranty or progressive damage
claim.
Compressor Mounting (Flange Mounted
Compressors)
A. Inspect drive hub and coupling for wear or damage. Replace
if necessary. Install compressor and check for proper alignment
before bolts are drawn tight.
Compressor Mounting (Base Mounted
Compressors)
A. Inspect pulley for wear or damage. Replace if necessary.
Install compressor and check for proper alignment.
!
CAUTION The maximum drive belt radial force is 240 lbs.
Air Discharge Line
A. See front side for Haldex recommendations. The line must be
.547 inch ID Minimum, show no bends smaller than a two inch
radius, be free of traps and slope downward toward the air
reservoir or air dryer.
Air Inlet
A. The compressor should never be used without an inlet filter. A
dirty or restricted filter will affect performance and cause the
compressor to pass an excessive amount of oil. The maximum
inlet restriction with the compressor running at 2400 rpm and
pumping to atmosphere is 20 inches of water. If intake vacuum
exceeds 20 inches of water, the intake filter must be changed. Do
not turbo charge a KN or KN(X) series compressor. Warranty is
void when turbo charging KN or KN(X) compressors.
Filter Incoming Air to 40 Microns Maximum
A. Clean air is necessary to prevent excessive cylinder and ring
wear. It is also necessary for operation of brake valves operating
under close clearances.
Drive System
A. The compressor installation and drive system has an influence
on compressor life. The compressor is designed to operate with
certain speeds and mountings. If the operating speed is too slow,
insufficient air supply may result. On the other hand, a very high
speed will shorten compressor life. The following is a guide for
good installation practice:
B. Recommended speed is 2400 rpm. The efficiency and life of the
air compressor falls off at speeds over 2400rpm.
Maximum Allowable Compressor Speed
Maximum Radial Force On Crankshaft
Maximum Pulley Offset
Excessive force on the crankshaft could result in short bearing life
and a broken crankshaft.
Governor Mounting
A. Inspect the reservoir to governor line. The line must
be free of contamination and kinks. CAUTION: The exhaust
port of any governor must be open to the atmosphere. If the
reservoir to governor line is too short, use kit SN4011F (this
will add eight inches to the line).
Governor Mounting (continued)
B. Keep Governor as Close to Compressor as Possible. The line
between compressor governor and unloader must not be greater than
5/16 inch ID or longer than five feet. Erratic governor performance
may result when the discharge line is beyond those limits.
C. Keep Governor Away from Engine Hot Spots. Excessive heat
is detrimental to the rubber seals in the governor; therefore, some
thought should be given as to its location. This also applies when
mounting the governor to the compressor - the governor should be
placed as far from the compressor discharge as possible.
D. Do Not Tie Into Governor Unloader Port. The volume of air the
governor must supply the unloader is critical in regard to proper
compressor function. Most governors are not designed with capacity
to control auxiliary devices other than some air dryers.
E. Governor Supply Line Must Be 1/4 Inch OD Minimum. When
the governor opens, air passes through the governor and fills the line
pressurizing the unloader pins cutting out the compressor. If the
governor supply line is restricted, a pressure loss at the governor
supply may close the governor valve and exhaust the air in the
unloader. As soon as pressure builds up again at the governor, it will
reopen. This cycle will continue at a high rate. To avoid this "flutter"
condition, the governor line should be at least 1/4 inch OD and should
not be restricted by fittings or sharp bends.
It is also recommended that this line be as short as possible and
be independent from other accessories requiring a supply of air
COMPRESSOR DISCHARGE
3000 rpm
Reservoir Drains
240 lbs.
A. Close before starting engine.
3 inches
Start Engine
A. Inspect installation for air pressure, coolant or oil leakage. Listen
for any noise which may indicate loose mounting or poor drive gear
alignment.
Governor Function
A. Build up air system. Observe cut out pressure (maximum system
pressure), "pump" foot control valve until compressor starts pumping
again (minimum system pressure). The most common pressure range
is 105 to 125 psi. Your fleet may require different pressure levels
3" MAX
which can be adjusted by changing the governor setting.
Rev. 6/02 2.5M ART L31043
Commercial Vehicle Systems
North American Sales Division
North American Sales Division
Haldex Brake Products Corporation
Haldex Limited
10707 NW Airworld Drive
525 Southgate Drive, Unit 1
Kansas City, MO 64153-1215
Guelph, Ontario Canada N1G 3W6
Phone: 816-891-2470
Phone: 519-826-7723
Fax: 816-880-9766
Fax: 519-826-9497
www.haldex.com · www.hbsna.com
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