Koehler K185 Series Guide

Operation and Instruction Manual
REV B
Koehler Instrument Company, Inc.
1595 Sycamore Avenue • Bohemia, New York 11716-1796 • USA
Toll Free: 1-800-878-9070 (US only) • Tel: [phone] • Fax: [phone]
http://www.koehlerinstrument.com • e-mail: [e-mail]
Petroleum Testing & Analysis Instrumentation • Custom Design & Manufacturing
K185XX
High Temperature Wheel Bearing Grease
Tester

K185XX High Temp Wheel Bearing Grease Tester
Operation and Instruction Manual
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CERTIFICATE OF CONFORMANCE
High Temperature Wheel Bearing Grease Tester
K185XX
This certificate verifies that part number K185XX, High Temperature Wheel
Bearing Grease Tester, was manufactured in conformance with the applicable
standards set forth in this certification.
Specifications: ASTM D3527
ASTM D4290
ASTM D4950
This unit is tested before it leaves the factory, to ensure total functionality and
compliance to the above specifications and ASTM standards. Test and inspection
records are on file for verification.
Jesse Kelly
Application Engineer
Koehler Instrument Company

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WEEE Directive Compliance Statement
Background
The goal of the WEEE Directive is to encourage design of environment-friendly products that increase reuse,
recycling and other forms of recovery to reduce waste streams and applies to listed Electronic and Electrical
Equipment (EEE) and Koehler's equipment falls broadly into Appendix 1A; Section 9 Monitoring and Control
Equipment: Measuring, weighing or adjusting appliances for household or as laboratory equipment.
Any associated non-embedded equipment such as Lighting (Saybolt Color) and PCs/Printers also fall under
WEEE. If provided with an order these ancillary items must be WEEE compliant. For these and other reasons
(printer cartridges are regionalized) the equipment must be supplied through a third party supplier in Europe.
The WEEE Directive applies to electrical and electronic equipment falling under the categories set out in Annex
IA provided that the equipment concerned is not part of another type of equipment that does not fall within the
scope of this Directive. Annex IB contains a list of products which fall under the categories set out in Annex IA.
http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2003:037:0024:0038:en:PDF
We do not qualify for any of the 10 exemption categories.
http://www.dpa-system.dk/en/WEEE/Products/Exemptions
Professional use
For equipment defined for ’professional use’ local authorities have no role to play. Producers and importers are
basically responsible for collection of WEEE recyclables from the professional user and for subsequent
management. A separate statement is given cataloging the items that require separation from the equipment
along with basic information on subsequent processing or recycling prior to disposal of the equipment.
http://www.dpa-system.dk/en/WEEE/Products/Private-or-professional-use
Responsibility for Registration and Annual Reporting:
Koehler will not sell directly to end users in the EU and so has no responsibility to register within each EU state
and to make annual reports. Koehler declares that this responsibility is born by the importer who is the first
level of the distribution chain and is subject to producer responsibility. We will communicate this in writing to
our distributor/importers in the EU stating they are responsible to satisfy WEEE registration and reporting
requirements in the EU states where they conduct sales activities.
It is illegal to market electrical and electronic equipment covered by producer responsibility without being
registered.
http://www.dpa-system.dk/en/WEEE/Producers/Whoissubjecttoproducerresponsibility
Product Design
Koehler's designs allow for complete disassembly to a modular level which usually allows for standard
recycling. A qualified refrigeration system technician must be consulted when disassembling and de-
commissioning any equipment with refrigeration systems.
Koehler's scientific testing equipment is robustly designed to function over a long service life and are typically
repaired many times over the course of years rather than being replaced. We believe that re-use and
refurbishment is the very best form of re-cycling.
All batteries must be readily removable not soldered in place.
Recycling instructions
In the event that replacement becomes necessary, we will include instructions, particularized to each
instrument that informs the customer of their recycling responsibilities and giving them guidance in doing this.
All Koehler equipment has been placed on the market since 13th August 2005 and so Koehler is defined as a
"new WEEE producer". As such we must provide information on refurbishment, treatment, and re-use.

K185XX High Temp Wheel Bearing Grease Tester
Operation and Instruction Manual
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Our instrument manual will include this compliance statement and indicate that any collection of materials will
be handled by their authorized distributor. In the event that the distributor is unreachable or is no longer a
distributor for Koehler Instrument, Co., other arrangements may be made including accepting the materials
directly.
Recycling is free of charge. Shipping is the responsibility of the end users. Whether shipping to a distributor or
to Koehler directly, safe, properly declared, and labeled packaging and shipping expenses are the sole
responsibility of the end user.
WEEE Marking
Since Koehler products are subject to the WEEE Directive we must display the WEEE symbol shown above in
accordance with European Standard EN 50419 on the equipment. It must be indelible, at least 5mm in height,
and clearly legible. If the equipment is too small the mark must be in the product literature, guarantee
certificate, or on the packaging. Rules on marking are established in section 49 of the WEEE Order.
Koehler Instrument Company, Inc.
c/o RECYCLING
1595 Sycamore, Ave.
Bohemia, NY 11716
As a minimum the following substances, preparations and components have to be removed from any
separately collected WEEE:
- Mercury containing components, such as switches or backlighting lamps (compact fluorescent lamps, CFL),
- Batteries
- Printed circuit boards if the surface of the printed circuit board is greater than 10 square centimeters (about 4
sq in.),
- Toner cartridges, liquid and pasty, as well as color toner,
- Chlorofluorocarbons (CFC), hydrochlorofluorocarbons (HCFC) or hydrofluorocarbons (HFC), hydrocarbons
(HC)
- Liquid crystal displays (together with their casing where appropriate) of a surface greater than 100 square
centimeters and all those back-lighted with gas discharge lamps,
- External electric cables
- Components containing refractory ceramic fibers as described in Commission Directive 97/69/EC of 5
December 1997 adapting to technical progress Council Directive 67/548/EEC relating to the classification,
packaging and labeling of dangerous substances (2),
- Electrolyte capacitors containing substances of concern (height > 25 mm, diameter > 25 mm or
proportionately similar volume)
2. The following components of WEEE that is separately collected have to be treated as indicated:
- Equipment containing gases that are ozone depleting or have a global warming potential (GWP) above 15,
such as those contained in foams and refrigeration circuits: the gases must be properly extracted and properly
treated. Ozone-depleting gases must be treated in accordance with Regulation (EC) No 2037/2000 of the
European Parliament and of the Council of 29 June 2000 on substances that deplete the ozone layer (4).

K185XX High Temp Wheel Bearing Grease Tester
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Table of Contents
1Introduction..............................................................................................................8
1.1 Koehler’s Commitment to Our Customers .......................................................................................8
1.2 Recommended Publications ............................................................................................................8
1.3 Instrument Specifications.................................................................................................................8
2Safety Information and Warnings...........................................................................9
3Getting Started.........................................................................................................9
3.1 Packing List......................................................................................................................................9
3.2 Unpacking ........................................................................................................................................9
4Operation................................................................................................................10
4.1 Description of Instrument Controls.................................................................................................10
4.2 Temperature Controller Operation.................................................................................................11
4.3 Spindle Temperature Display Operation........................................................................................12
4.4 Bearing Assembly Procedure ........................................................................................................13
4.5 Control Panel Setup.......................................................................................................................14
4.6 Operating the Torque or Current Meter Alarm Limit ......................................................................14
5Service....................................................................................................................15
5.1 Over-Temperature Protection ........................................................................................................15
5.2 Over-Power Protection...................................................................................................................15
6Service....................................................................................................................15
7Maintenance...........................................................................................................15
7.1 Routine Maintenance.....................................................................................................................15
7.2 Troubleshooting .............................................................................................................................15
8Replacement Parts................................................................................................. 16
9Storage ...................................................................................................................17
10 Warranty.................................................................................................................17
11 Returned Goods Policy.........................................................................................17
Notes............................................................................................................................ 18
Notes............................................................................................................................ 19
Notes............................................................................................................................ 20

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1 Introduction
The Koehler High Temperature Wheel Bearing
Grease Tester is the latest design for performing
ASTM D3527, D4290, and D4950 test
specifications. The high temperature stability of
automotive wheel bearing greases is evaluated
in a modified automotive front wheel hub-
spindle-bearings assembly. The ASTM D3527
Life Performance test employs severe conditions
(25 lbf (111N) thrust load, 1000rpm, 160°C
spindle temperature) to induce grease
deterioration and failure. The test continues in a
20/4 hour on/off cycle until grease breakdown
causes measured drive motor torque to increase
past an established end point. The number of
hours to failure is the test result. The ASTM
D4290 Accelerated Leakage Tendencies
procedure employs similar test conditions for a
20 hour period, after which leakage of grease
and oil is measured and the bearings are
washed and examined for deposits of gum and
varnish.
The unit consists of a modified front wheel
hub-spindle-bearings assembly housed in a
constant temperature oven and coupled by a 1/4
horsepower variable-speed drive motor. The
unit controls test functions automatically and
provides continuous digital display of motor
torque, RPM, chamber temperature, spindle
temperature, time and elapsed time.
This manual provides important information
regarding safety, technical reference, installation
requirements, operating condition specifications,
user facility resource requirements, and
operating instructions for the High Temperature
Wheel Bearing Grease Tester. This manual
should also be used in conjunction with
applicable published laboratory procedures.
Information on these procedures is given in
section 1.2.
1.1 Koehler’s Commitment to Our
Customers
Providing quality testing instrumentation and
technical support services for research and
testing laboratories has been our specialty for
more than 50 years. At Koehler, the primary
focus of our business is providing you with the
full support of your laboratory testing needs. Our
products are backed by our staff of technically
knowledgeable, trained specialists who are
experienced in both petroleum products testing
and instrument service to better understand your
requirements and provide you with the best
solutions. You can depend on Koehler for a full
range of accurate and reliable instrumentation
as well as support for your laboratory testing
programs. Please do not hesitate to contact us
at any time with your inquiries about equipment,
tests, or technical support.
Toll Free: 1-800-878-9070 (US only)
Tel: [phone]
Fax: [phone]
Email: [e-mail]
http://www.koehlerinstrument.com
1.2 Recommended Publications
1. American Society for Testing and Materials
(ASTM)
100 Barr Harbor Drive
West Conshohocken, Pennsylvania 19428-
2959, USA
Tel: [phone]
Fax: [phone]
http://www.astm.org
email: [e-mail]
ASTM Publication:
ASTM D3527: Life Performance of
Automotive Wheel Bearing Grease
ASTM D4290: Determining the Leakage
Tendencies of Automotive Wheel
Bearing Grease Under Accelerated
Conditions
ASTM D4950: Standard Classification
and Specification for Automotive Service
Greases
1.3 Instrument Specifications
Electrical Requirements
Model No
Voltage
Frequency
Amps
K18500
115V
60 Hz
13A
K18590
220-240V
50 Hz
7A
K18595
220-240V
60 Hz
7A

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Digital Controls and Displays
Timer:
On/off cycle and real time
Chamber Temperature:
°C
Spindle Temperature:
°C
Motor RPM:
0-1725 rpm
Motor Torque:
Current Draw
Elapsed Time:
9999.9 hr
Max Temperature:
177°C (350°F)
2 Safety Information and Warnings
Safety Considerations. The use of this
equipment may involve hazardous materials and
operations. This manual does not purport to
address all of the safety problems associated
with the use of this equipment. It is the
responsibility of any user of this equipment to
investigate, research, and establish appropriate
safety and health practices and determine the
applicability of regulatory limitations prior to use.
Equipment Modifications and Replacement
Parts. Any modification or alteration of this
equipment from that of factory specifications is
not recommended and voids the manufacturer
warranty, product safety, performance
specifications, and/or certifications whether
specified or implied, and may result in personal
injury and/or property loss. Replacement parts
must be O.E.M. exact replacement equipment.
Unit Design. This equipment is specifically
designed for use in accordance with the
applicable standard test methods listed in
section 1.2 of this manual. The use of this
equipment in accordance with any other test
procedures, or for any other purpose, is not
recommended and may be extremely
hazardous.
Overtemperature Protection. This unit is
equipped with Overtemperature Protection
(OTP) circuitry to prevent overheating. The unit
will automatically interrupt power whether
equipment malfunction or operator error causes
the temperature to exceed either 20 °C above
the set point or the maximum recommended
temperature range. The power can only then be
restored by identifying and correcting the
problem, allowing the unit to return to normal
operating temperatures, and resetting the power
to the unit.
Chemical Reagents Information. Chemicals
and reagents used in performing the test may
exhibit potential hazards. Any user must be
familiarized with the possible dangers before
use. We also recommend consulting the
Material Data and Safety Sheet (MSDS) on each
chemical reagent for additional information.
MSDS information can be easily located on the
internet at http://siri.uvm.edu or
http://www.sigma-aldrich.com.
3 Getting Started
3.1 Packing List
High Temperature Wheel Bearing Grease
Tester (K18500, K18590, K18595)
Spindle Thermocouple (K185-0-42A)
Cabinet Thermocouple (K185-0-42)
Inboard Bearing Set (289-004-001)
Includes: LM67048 Cone and LM67010
Cup
Outboard Bearing Set (289-004-002)
Includes: LM11949 Cone and LM11910
Cup
Grease Packer Assembly (K185-0-47B)
Bearing Installation/Removal Tools:
Includes:
Bearing Installer (K185-0-50)
Small Bearing Cup Remover (K185-0-
51A)
Large Bearing Cup Remover (K185-0-
51B)
Bearing Cup Installer (K185-0-56)
Bearing Puller (K185-0-49)
Spindle Wrench Pins (K185-0-41)
Accessories (purchased separately):
ASTM 42C Thermometer (250-000-42C)
Range: 95 to 255°C
3.2 Unpacking
Carefully unpack and place the instrument and
accessories in a secure location. Ensure that all
parts listed in previous section are present.
Inspect the unit and all accessories for damage.
If you find any damage, keep all packing
materials and immediately report the damage to
the carrier. We will assist you with your claim, if
requested. When submitting a claim for shipping
damage, request that the carrier inspect the
shipping container and equipment. Do not return
goods to Koehler without written authorization.

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WARNING: For personal safety, do not
operate the apparatus with the chamber doors
open. There is a possibility of electrical shock
and the possibility of injuries due to moving
mechanical parts and high temperatures.
Remove the main chassis from the carton and
place on a firm, level table in an area with
adequate ventilation or in a hood.
WARNING: Be sure two or more
individuals are available for extracting and lifting
instrument from box to cart and from cart to
bench. Individuals must lift in accordance to
proper technique. See Figure below.
Environmental Conditions: The instrument
environment must comply with the following
conditions for proper setup:
No / Low Dust
No direct sunlight
Not near heating or AC ventilation ducts
No Vibrations
Clearance from other instruments
Temperature Range: 5 to 40°C
Elevation to 2000 meters
Relative Humidity: < 80%
Power: Connect the line cords to properly fused
and grounded receptacles with the correct
voltage as indicated in section 1.3 or on the
information plate at the back of the individual
units.
WARNING: For user safety, please
disconnect the line cord whenever performing
any maintenance and/or cleaning of the unit.
4 Operation
The Koehler High Temperature Wheel Bearing
Grease Tester is designed for acquiring test
data in accordance with the ASTM D3527 and
D4290 test procedures. Please be sure to read
the safety and hazard warnings, the installation
procedure, and the standard test method before
operating this instrument.
4.1 Description of Instrument Controls
1. Timer. Displays the current time. The start
and finish times for testing can be
programmed. Please refer to the K18500
Timer Manual for full details of operating the
timer. Note that when you turn on the unit
only the timer and reset switch lights will be
illuminated. In order to start a test, set the
timer to the desired on and off times and
press the reset (RST) button. After pressing
the reset button, turn on the switches for the
fan, heat, and motor. These displays will
only turn on when the start time is reached.
Once the stop time is reached then these
components will automatically turn off. The
timer has two functions: to turn on/off the
motor, fan, and heat, and to keep track of
how long the motor has been running
(elapsed time). To toggle between the Real
Time Clock and the Elapsed Timer, press
the display (DSP) key. To reset the Elapsed
Timer to zero, make sure that the Elapsed
Time is currently being displayed and then
press reset (RST) to reset to zero.
2. Spindle Temperature Display. Displays the
spindle temperature in °C.
3. Chamber Temperature Display. Displays
the chamber temperature in °C.
4. Torque Display. Displays the torque
indicated as the motor current in milliamps
(mA).
5. Motor RPM Display. Displays the
revolutions per minute (RPM) of the motor.
6. Elapsed Time. Displays the time elapsed
during the test.
7. Line Switch. Controls the power to all the
electrical components.

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8. Motor Switch. Turns the power for the
motor on and off.
9. Speed Control. Adjust the motor speed by
pressing the up/down arrows.
10. Temperature Controller. The digital
temperature controller as shown in Figure 1
provides full temperature control of the
apparatus.
4.2 Temperature Controller Operation
Figure 4. Temperature Controller
1. Process Temperature Display. The
upper red LED display shows the
process temperature as read from the
RTD probe.
2. Set Point Temperature Display. The
lower green LED display shows the set
point temperature of the controller.
3. Programming Key. Permits scrolling
through controller menu parameters.
One Level Forward
4. Down Key. Used to decrease the set
point temperature and to decrease or
change parameter values when
programming the temperature controller.
5. Up Key. Used to increase the set point
temperature and to increase or change
parameter values when programming
the temperature controller.
6. Exit / Function Key. This key is used to
exit or leave a level. One level backward
IMPORTANT NOTE: The digital
temperature controller for the unit
comes pre-programmed from the
Koehler factory. Please do NOT attempt
to re-program the digital temperature
controller as this will void the product
warranty. If assistance is required,
please do not hesitate to contact the
Koehler technical service department.
Setting the Temperature. Set the desired
operating temperature by adjusting the set
point with the up and down keys. The set
point will be displayed in the lower green Set
Point LED display and the actual
temperature will be displayed in the upper
red Process LED display. Please allow the
instrument to fully equilibrate before
proceeding with any testing.
Temperature Calibration. This routine allows
the digital temperature controller to be
calibrated to a certified thermometer.
a. Use a certified calibrated measuring
device to acquire the temperature.
Calculate the difference between the
measuring device and the Process
value displayed on the controller.
b. Press the program key two times until
PCt is displayed in the lower green LED
display. Press the DOWN key. CAL will
display on the lower green display. If
there is a value observed in the upper
red LED display, add it to the calculated
difference obtained in the previous step.
This is the offset value.
c. Press the Program Key. The lower
green display will flash. Use the up or
down keys to adjust to the new
calibration offset value on the upper red
display calculated in the previous step.
When the value has been entered, the
controller will automatically store the
value. The lower green display will stop
flashing. If further adjustments are
necessary, press the Program Key
again. Resume regular operations by
pressing the Exit / Function key two

K185XX High Temp Wheel Bearing Grease Tester
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times. Verify if the new calibration is
correct by observing the upper red
display and comparing the value with
the calibrated reference device.
Auto Tune. This routine allows the digital
temperature control to learn the heating
parameters needed for any particular set
point temperature. This operation should be
done when installing a new unit, after
replacing or changing the bath medium type,
or utilizing a different temperature set point
20% different from the previously used set
point temperature.
a. Set the operating temperature to the
desired setting.
b. Press the up and down arrow buttons
simultaneously for about 5 seconds.
When Auto Tune is active, the lower
green LED display will blink TUNE. Auto
Tune will automatically toggle off when
the set point temperature is reached.
Auto tune can be terminated by pressing
the up & down buttons simultaneously
again.
4.3 Spindle Temperature Display
Operation
The display will blink "Type" and “J" the spindle
temperature display is in the "Program Mode.”
This mode allows you to change the
temperature units, set an offset, or change the
number of decimal units. To get out the program
mode there is toggle switch located on the back
of the control box unit next to the spindle probe.
Toggle the switch to the regular mode of
operation. If you need to get back in to the
programming, then simply toggle the switch
back.
Selection Variables
Input Type - t, E, J, k, r, S, b, n or LIN (default:
J)
To select the input type, press the blank button
to scroll through the available input types. Press
the “SEL” button to enter the choice and return
to the main menu.
CJC - YES, NO (default: YES)
This program item enables or disables internal
cold junction compensation. Pressing the “blank”
button toggles between Yes and No. For most
applications, cold junction compensation should
be enabled (YES). Press the “SEL” button to
enter the choice and return to the main menu.
This menu item does not appear if TYPE = LIN.
DISP - 0C, 0.0C, 0F, 0.0F (default: 0.0C)
This program item sets the display for
Fahrenheit or Celsius and whole number or
tenths. Tenths is not available for thermocouple
types R, S, and B. To change the display, use
the “blank” button to scroll through the list of
choices. Press the “SEL” button to enter the
choice and return to the main menu. This menu
item does not appear if TYPE = LIN.
FLtEr - 0, 1, 2, 3 (default: 0)
If the displayed process signal is difficult to read
due to small process variations or noise,
increased levels of filtering will help to stabilize
the display. Software filtering effectively
combines a fraction of the current input reading
with a fraction of the previous displayed reading
to generate the new display. Filter values
represent no filtering (0), up to heavy filtering
(3). A value of 1 for the filter uses 1/4 of the new
input and 3/4 of the previous display to generate
the new display. A filter value of 2 uses 1/8 new
and 7/8 previous. A filter value of 3 uses 1/16
new and 15/16 previous. To select the filter
level, use the “blank” button to scroll through the
list of choices. Press the “SEL” button to enter
the choice and return to the main menu.
RANGE - 00000 to 00099 (Range: 0)
The range value selected determines if the filter,
as set previously, will be applied to the new
input sample. If the new input value is within the
± range of the previous display, the filter will be
applied to the new input.
Example:
new input sample = 891 °C
previous display = 885 °C
range = 10 °C
885 ± 10 = 875 to 895 degree filter range based
on previous display.
The new input sample (891 °C) is within ± 10 °C
of the previous display (885°C), so the filter is
applied to the new input signal. If the new input
is outside the filter range, no filter is used. This
allows fast response to large signal changes and
maximum filtering of small signal changes.

K185XX High Temp Wheel Bearing Grease Tester
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To enter the range value, use the “blank” button
to increment the flashing digit. To select a new
digit, press the “SEL” button. After the desired
value is on the display, press and hold the “SEL”
button for three seconds to enter the value and
return to the main menu.
OFSEt - ± 00000 to 99999 (default: 0)
The offset value is used to add or subtract a
constant temperature from the display. Typically
this value should be zero. Changing this value
does not affect calibration, but will affect the
displayed temperature. If a constant offset error
is occurring in the application, this feature may
be used to reduce or eliminate that error. To
enter an offset value, use the “blank” button to
increment the flashing digit or the sign of the
number. To select a new digit or sign of the
number, press the “SEL” button. If no digits are
flashing, use the “blank” button to toggle the sign
of the number or press the “SEL” button to wrap
around to the LSD. After the desired value is on
the display, press and hold the “SEL” button for
three seconds to enter the value and return to
the main menu.
CAL - YES/NO (default: NO)
Note: Read the entire Calibration instructions
before attempting to calibrate the unit. Access
codes are contained in the calibration
procedures. This unit is calibrated from the
factory. Initial calibration is not necessary.
Calibration should only be performed by
individuals experienced in calibrating electronic
equipment.
This item places the unit in calibration mode.
Read the entire Calibration section before
attempting to calibrate this unit. If calibration is
entered by accident, press and hold the “SEL”
button when the display shows 00000 for access
code. Approximately three seconds later the
display will return to TYPE in the Program Menu.
To enter the Calibration Mode, use the “blank”
button to change the NO to a YES. Press the
“SEL” button to enter the choice.
4.4 Bearing Assembly Procedure
Note: Be sure to read the safety and hazard
warnings, installation procedure and any of the
standard test methods mentioned in the
introduction of this manual before operating this
instrument.
1. Place the motor on the resting mount by
loosening the motor leveling screw on the
locking post and laying the motor leveling
screw on its side. Slide the motor completely
back and lift up. Carefully lay the motor on its
resting mount. CAUTION: DO NOT DROP
THE MOTOR ON THE MOUNT.
2. Slide both chamber doors out and secure in a
safe place.
3. (Refer to Assembly Drawing “C” for labeled
diagrams). Insert the two spindle wrench pins
into the hub (#10) and hub insert (#14) into
the appropriate holes and twist outward to
loosen. Remove the hub insert. Remove the
10-32 socket cap screw and remove the cap
(#16). Carefully remove the hub by placing
the bearing puller behind the grease collector
(#26) and hold the bearing puller thrust
washer in front of the spindle shaft and align
the screw of the bearing puller to fit the
countersink of the washer. Using the screw
of the bearing puller, carefully jack the
bearing hub off the spindle (refer to diagram
titled “Hub Removal”). Remove the bearing
cups from the hub (refer to the drawing titled
“Bearing Cup Removal”). Note: Heating the
hub slightly will ease the removal of the
bearing cup.
4. Prepare the test bearings as per ASTM
D3527 standard test method. After
preparation of the test bearings, reinstall the
large bearing cone to the shaft using the
bearing installer supplied (refer to the
drawing titled “Bearing Cone Installation”).
5. Gently press or tap the bearing installer until
the bearing is seated. Install bearing cups in
the hub by using the bearing cup installation
tool (refer to the drawing titled “Bearing Cup
Installation”). Note: Heating the hub slightly
will ease the re-installation of the bearing
cup.
6. Reassemble the rest of the hub assembly,
being extra cautious not to hit the spindle with
the hub. The hardened bearing cups inside
the hub will damage the spindle causing the
small bearing to bind, and affect the “torque”
or current reading of the unit. Note: For ease
of spindle disassembly, the entire assembly
may be removed from the cabinet by
removing the four(4) 3/8-16 hex head cap
screws.

K185XX High Temp Wheel Bearing Grease Tester
Operation and Instruction Manual
K185XX-Manual -14-
7. Adjust the thrust load for 25 lbs. axial load on
the wheel bearings per the ASTM D3527
standard test method (see Assembly
drawings A and B).
8. Reinstall the chamber doors and lift the drive
motor off the resting mount. Slide the drive
motor forward and re-engage the drive
coupling. Tighten the motor leveling screw.
9. Install the chamber thermocouple into the
fitting on top of the cabinet and lock into
place. Insert the jack into the connector on
the back of the control cabinet marked
CHAMBER. Next take the spindle
thermocouple and slide into place (see
drawing “C”). Connect the jack to the
receptacle on the control cabinet marked
SPINDLE. Finally, insert a calibrated test
thermometer into the fitting provided on top of
the oven chamber next to the thermocouple.
10. Turn off all switches on the control cabinet
and connect mating plug to the connector at
the rear.
11. Plug the line cord into a fused and grounded
outlet of correct voltage as marked on the
rear panel of the control unit.
4.5 Control Panel Setup
1. Set the timer. Please refer to the K18500
Timer Manual for full details of operating the
timer. Note that when you turn on the unit
only the timer and reset switch lights will be
illuminated. In order to start a test, set the
timer to the desired on and off times and
press the reset (RST) button. After pressing
the reset button, turn on the switches for the
fan, heat, and motor. These displays will
only turn on when the start time is reached.
Once the stop time is reached then these
components will automatically turn off. The
timer has two functions: to turn on/off the
motor, fan, and heat, and to keep track of
how long the motor has been running
(elapsed time). To toggle between the Real
Time Clock and the Elapsed Timer, press
the display (DSP) key. To reset the Elapsed
Timer to zero, make sure that the Elapsed
Time is currently being displayed and then
press reset (RST) to reset to zero.
2. Turn the heater, fan, and motor switches on.
3. Set the desired temperature.
4. Adjust motor speed to 1000 RPM.
5. The digital meter labeled torque on the front
panel indicates the current in milliamperes
which is a direct indication of motor torque.
6. After the test temperature has been
reached, a steady state running torque (T)
will develop in the first two hours of
operation as indicated by a stabilized value
on the meter. Refer to ASTM D3527 to
calculate the motor cut-off valve.
4.6 Operating the Torque or Current
Meter Alarm Limit
OPERATING MODE
The meter is in normal operation and the input
signal value is displayed.
MENU MODE
The meter display and outputs do not respond to
the input signal and alarm relays are
deenergized.
MENU KEY
The menu key changes the meter from the
operating mode to the menu mode and steps
through the various meter parameters that may
be selected. These menu items may be “locked
out” from front panel selection by software and
hardware.
PEAK DISPLAY KEY (DIGIT SELECT)
In the Operating Mode, pressing the Peak
Display Key causes the peak value of the input
signal to be displayed. Pressing the key again
returns the display to the present value. In the
Menu Mode, the Digit Select Key (Peak Display
Key) is used to select input type and decimal
point or to select one of the five display digits for
programming. In the main menu, pressing the
Digit Select Key causes the value or code that is
stored for that menu item to be displayed and
the left hand digit flashes. Each time the key is
pressed, the next digit to the right will flash. The
value of the flashing digit may be changed using
the Value Select Key. In the Alarm Mode,
pressing the Digit Select Key causes the most
significant digit of the displayed setpoint value to

K185XX High Temp Wheel Bearing Grease Tester
Operation and Instruction Manual
K185XX-Manual -15-
flash. Digits are then selected the same as in the
Menu Mode.
RESET KEY (VALUE SELECT)
In the Operating Mode, holding the Reset Key
depressed and pressing any other key causes a
reset to occur. The Menu Key resets all meter
functions, the Alarm Key resets any alarm
conditions and the Peak Display Key resets the
peak value to present value. Reset Key is
pushed and released without depressing
another button, gross weight is displayed and an
indicator lights. Reaping this returns the display
to net weight. In the Menu Mode or Alarm
Mode, the Value Select Key (Reset Key) sets
the value of the flashing digit. Each time the key
is pressed, the value increases by one. Holding
the key down causes the digit to automatically
step through the numbers.
ALARM KEY (REVERSE MENU)
In the Operating Mode, pressing the Alarm Key
displays the setpoint of Alarm 1, then Alarm 2.
These values may be changed using the Digit
Select Key and the Value Select Key. In the
Menu Mode, pressing the Alarm Key steps the
display backward through the menu.
Note: Please refer to the separate manual for
complete details of operating the meter.
5 Service
The Koehler High Temperature Wheel Bearing
Grease Tester is equipped with several safety
and protection features, which are described in
the following sections.
5.1 Over-Temperature Protection
The Koehler High Temperature Wheel Bearing
Grease Tester is equipped with Over-
temperature Protection (OTP) circuitry, which
prevents the unit from exceeding unsafe
operating temperatures. If the unit cannot
maintain the set point temperature and begins to
decline, the OTP circuitry may have been
activated. Please follow these steps.
1. Turn off the unit power switch and
disconnect the line cord.
2. Determine the source of the problem
and correct the situation.
3. Restart the unit. Monitor the operations
to ensure that the unit is operating
properly. If you are still experiencing
trouble, please contact Koehler
technical service for assistance.
5.2 Over-Power Protection
The Koehler High Temperature Wheel Bearing
Grease Tester is equipped with Over-power
Protection circuitry, which prevents the unit from
unsafe electrical conditions. If power to the unit
is lost, then turn off the main power and turn it
back on again. The main power switch also
functions as a circuit breaker.
6 Service
Under normal operating conditions and with
routine maintenance, the High Temperature
Wheel Bearing Tester should not require
service. Any service problem can be quickly
resolved by contacting Koehler’s technical
service department either by letter, phone, fax,
or email. In order to assure the fastest possible
service, please provide us with the following
information.
Model Number:
Serial Number:
Date of Shipment:
7 Maintenance
WARNING: Disconnect power to the unit
before servicing to avoid exposure to high
voltages and/or temperatures which may result
in personal injury or death. If you have any
questions about maintaining your equipment,
then please do not hesitate to contact the
Koehler technical service department.
7.1 Routine Maintenance
The Koehler High Temperature Wheel Bearing
Grease Tester requires little routine
maintenance to provide many years of
continuous service. Regularly inspect the
brushes of the drive motor for possible
replacement. This motor is equipped with ball
bearings, which have been factory lubricated.
7.2 Troubleshooting

K185XX High Temp Wheel Bearing Grease Tester
Operation and Instruction Manual
K185XX-Manual -16-
1. Oven Does Not Heat
a. Check the set point temperature.
b. Check the probe for continuity.
c. Replace the control (this unit is not
repairable).
2. Oven/Spindle Temperature is Not Maintained
within Specifications
a. Check the spindle thermocouple for proper
location per test method specifications.
b. Check the oven circulating fan for proper
operation.
c. Check control for proper operation by placing
the temperature probe in a constant
temperature bath.
3. Test (Drive) Motor Does Not Operate
a. Ensure that the motor switch is in the ON
position.
b. Ensure that the speed control dial is turned
up.
c. Check the fuse on the front panel located
under the motor control switch.
d. Check the fuse on the motor rpm control
unit. Access is through the rear panel of the
control box.
4. Circulating Fan Does Not Operate
a. Ensure that the fan switch is in the ON
position.
b. Check the voltage to the motor.
c. Replace the motor as needed.
5. Elapsed Timer Does Not Function
a. Replace the meter. Access is obtained from
the front control panel.
6. Erroneous Torque Results
a. Swap in a known good load cell. If the
reading on the strain gauge is now good,
replace the bad load cell.
b. If the reading is still wrong, the problem may
be with the strain gauge. Consult the strain
gauge manual or call the factory for
assistance.
8 Replacement Parts
Part Number
Replacement Part
215-115-001
Heater (115V)
215-230-001
Heater (230C)
288-115-004
Fan Motor (115V/230V 50/60Hz)
K185-0-42
Cabinet Thermocouple Probe
K185-0-42A
Spindle Thermocouple Probe
K185-0-7A
Spindle
K185-0-10
Bearing Hub
K185-0-11
Guide
K185-0-14
Drive Hub
K185-0-15
Nut
K185-0-16
Pressure Cap
K185-0-18
Spindle Rod
K185-0-21
Fan Blade
K185-0-26
Grease Collector
K185-0-41
Spindle Wrench Pin
K185-0-47B
Bearing Packer
K185-0-48
Motor Coupling and Insert
K185-0-51A
Small Bearing Cup Remover
K185-0-51B
Large Bearing Cup Remover
K185-0-62
Calibrated Spring and Gauge Assy
K145-8
Thermometer Ferrule
289-004-001
Inboard Bearing Set
289-004-002
Outboard Bearing Set
310-108-000
1/8 Hex Key
278-010-001
Fuse (10 amp)
278-015-001
Fuse (15 amp)
278-020-001
Fuse (20 amp)

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Operation and Instruction Manual
K185XX-Manual -17-
9 Storage
This laboratory test instrument is equipped
with electrical components. Storage facilities
should be consistent with an indoor laboratory
environment. This testing equipment should not
be subjected to extremes of temperature and/or
moisture.
This equipment was shipped from the factory
in a corrugated cardboard container. If long term
storage is anticipated, re-packing the instrument
in a water-resistant container is recommended
to ensure equipment safety and longevity.
10 Warranty
We, at Koehler, would like to thank you for
your equipment purchase, which is protected by
the following warranty. If within one (1) year from
the date of receipt, but no longer than fifteen
(15) months from the date of shipment, Koehler
equipment fails to perform properly because of
defects in materials or workmanship, Koehler
Instrument Company, Inc. will repair or, at its
sole discretion, replace the equipment without
charge F.O.B. its plant, provided the equipment
has been properly installed, operated, and
maintained. Koehler Instrument Company must
be advised in writing of the malfunction and
authorize the return of the product to the factory.
The sole responsibility of Koehler Instrument
Company and the purchaser’s exclusive remedy
for any claim arising out of the purchase of any
product is the repair or replacement of the
product. In no event shall the cost of the
purchaser’s remedy exceed the purchase price,
nor shall Koehler Instrument Company be liable
for any special, indirect, incidental,
consequential, or exemplary damages.
KOEHLER INSTRUMENT COMPANY, INC.
DISCLAIMS ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED, INCLUDING ANY
IMPLIED WARRANTIES OF FITNESS FOR A
PARTICULAR PURPOSE. Please save the
shipping carton in the event the equipment
needs to be returned to the factory for warranty
repair. If the carton is discarded, it will be the
purchaser’s responsibility to provide an
appropriate shipping carton.
11 Returned Goods Policy
To return products for credit or replacement,
please contact Koehler Customer Service with
your purchase order number, our packing
list/invoice number, the item(s) to be returned
and the reason for the return. You will be issued
a Returned Authorization (RA) number, which
must be prominently displayed on the shipping
container when you return the material to our
plant. Shipping containers without an RA
number prominently displayed with will be
returned to the sender. Goods must be returned
freight prepaid. Returns will be subject to a
restocking charge, the application of which will
depend upon the circumstances necessitating
the return. Some returns cannot be authorized,
including certain products purchased from
outside vendors for the convenience of the
customer, products manufactured on special
order, products shipped from the factory past
ninety (90) days, and products which have been
used or modified in such a way that they cannot
be returned to stock for future sale.

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Operation and Instruction Manual
K185XX-Manual -18-
Notes

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Operation and Instruction Manual
K185XX-Manual -19-
Notes

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Operation and Instruction Manual
K185XX-Manual -20-
Notes