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Summary of Contents for Woodward 1502ES
- Page 1 Troubleshooting Guide Solenoid Troubleshooting Guide Internally & Externally Switched Solenoids Push & Pull Type Solenoids Manual 36541 Back to index...
- Page 2 Revisions—Text changes are indicated by a black line alongside the text. Woodward Governor Company reserves the right to update any portion of this publication at any time. Information provided by Woodward Governor Company is believed to be correct and reliable. However, no responsibility is assumed by Woodward Governor Company unless otherwise expressly undertaken.
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Page 3: Table Of Contents
Solenoid Linkage Adjustment ................20 Table 7. Linkage Adjustment ................21 Overload Protection ....................22 Solenoid Bench Testing..................22 4. S ..............23 HAPTER ERVICE PTIONS Product Service Options ..................23 Returning Equipment for Repair ................24 Replacement Parts ....................25 How to Contact Woodward...................25 Engineering Services....................26 Technical Assistance....................27 Woodward... -
Page 4: Electrostatic Discharge Awareness
PCB from the control cabinet, place it in the antistatic protective bag. CAUTION To prevent damage to electronic components caused by improper handling, read and observe the precautions in Woodward manual 82715, Guide for Handling and Protection of Electronic Controls, Printed Circuit Boards, and Modules. Woodward... -
Page 5: Chapter 1. General Information
Figure 1 shows the various parts of a basic single coil solenoid. Figure 1. Basic Single Coil Solenoid Woodward... -
Page 6: Dual Coil Solenoid
Since the current required to hold the plunger is low (typically 1.2 amps), the hold coil can be energized continuously without overheating. This unique design results in a highly efficient and compact solenoid approximately one-half the size of a comparable single coil unit. Figure 2. Components of a Dual Coil Solenoid Woodward... -
Page 7: Three Methods For Turning Off The Pull Coil
The sealed 3-wire solenoid is well suited for these harsh conditions. EXTERNAL SWITCHING WITH TIMER MODULE With the addition of a Woodward pull coil timer module, the externally switched (3-wire) solenoid can be used not only in operator/driver controlled... -
Page 8: Externally Switched Solenoid Terminations
2. Switch cap with spade type terminals: designed for harness leads to be connected without soldering 3. Switch cap with screw type terminals: designed for harness leads to be be screwed on Figure 3. Terminations on Externally Switched Solenoids Woodward... -
Page 9: Pull Vs. Push Solenoids
In ETR applications, the solenoid is on continuously and therefore the ES solenoid requires some form of coil protection such as a Coil Commander unit to protect from engine over cranking. In ETS operation, since the application is being turned off, the need for protection is minimum. Woodward... -
Page 10: Shutdown Vs. Throttle (Choke) Applications
30-second attempts with a cool-down period of two minutes (120 seconds) between each cranking attempt. After three cranking attempts (total elapsed time of 5½ minutes), the solenoid must be allowed to cool down to ambient temperature before making further cranking attempts. Woodward... -
Page 11: Chapter 2. Basic Troubleshooting
Be aware that when several items of equipment are connected together it is not easy to pinpoint the one item that is faulty. Also be aware that in many cases, the problem may be that the operator is not using the equipment properly or that there is some misadjustment. Woodward... -
Page 12: Safety Precautions
After making sure the solenoid is working, you can re-install the solenoid and test it on the application. 2. You can test the solenoid while still installed on the application and remove it for bench testing only after eliminating other possible sources of trouble. Woodward... -
Page 13: Identifying Solenoid Type
The label on the solenoid contains a model number descriptor and a part number descriptor. The part number descriptor specifies the type of features the solenoid has. Figure 5. Woodward Solenoid Label Woodward... -
Page 14: Part Number Descriptor
B1 = Constant Volume B2 = Bellows S1 Indicates return spring forces Consult the factory for ratings A Indicates special options A = Aux Terminal C = Conduct Cover CC = Coil Commander Consult the factory for additional information or explanation. Woodward... -
Page 15: Chapter 3. Detailed Troubleshooting
Replace battery if needed. 4. If the voltage readings are acceptable, but the solenoid does not pull in, prepare to remove the solenoid from the application and test it on the bench. Woodward... -
Page 16: Wiring To The "S" Terminal Of Starter
If the resistance is not infinite, the solenoid is incorrectly wired to the “S” terminal of the starter. Re-wire the solenoid correctly. (Refer to the publication SE-3024 for recommended wiring schemes). Figure 6. Connection to the “S” Terminal is Not Recommended. Woodward... -
Page 17: Solenoid Coil Resistance Check
6. Refer to the coil resistance chart (1A or 1B) for the correct values. NOTE Some specially manufactured solenoid units may not follow the general wire color scheme presented here. Figure 7. An Ohmmeter to Measure Resistance is Recommended. Woodward... - Page 18 Solenoid Troubleshooting Guide Manual 36541 Table 1A. Coil Resistance Externally Switched Solenoids Measurement Range Model Pull Coil Resistance Hold Coil Resistance Voltage (White/Black Wire) (Red/Black Wire) 0.308-0.376 14.365-14.655 1502ES 1.280-1.255 48.897-59.763 0.348-0.426 13.45-16.43 1503ES 0.232-0.284 9.819-12.001 1751ES 0.878-1.073 46.548-56.892 1751ES/ 0.232-0.284 9.82-12.00...
- Page 19 0.878-1.073 46.55-56.89 6.363-7.777 226.26-276.54 0.324-0.396 12.97-15.85 1753 1.208-1.477 54.72-66.89 8.730-10.670 296.10-361.40 0.195-0.239 10.04-12.27 1755 0.754-0.922 47.94-58.60 0.248-0.303 17.48-21.36 2001 0.936-1.144 71.01-86.81 0.179-0.219 13.33-16.29 2003 0.577-0.706 48.78-59.62 0.185-0.227 6.50-7.94 0.703-0.859 37.27-45.55 0.496-0.606 18.90-23.10 2370 0.185-0.227 6.50-7.94 0.703-0.850 37.27-45.55 0.358-0.438 23.98-19.62 Woodward...
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Page 20: Solenoid Operation On The Engine Or Application
Remember to limit cranking to three 30-second attempts with a cool- down period of two minutes (120 seconds) between each cranking attempt. After three cranking attempts, the solenoid must be allowed to cool down to ambient temperature (5½ minutes total elapsed time) before any further attempts are made. Woodward... - Page 21 If the linkage checks OK, bench test the solenoid (refer to Solenoid Bench Testing section). NOTE: Be aware that there can be non-solenoid related causes for this condition such as alternator circuit feeding back through the hold coil or OEM wiring problem. Woodward...
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Page 22: Solenoid Voltage Check
For externally switched solenoids, the typical wiring scheme is as follows: Solenoid Wire Marking Solenoid Wire Color Hold Pull White Common Black NOTE Some specially manufactured solenoid units may not follow the general wire color scheme presented above. Figure 8. Jumper Harness Woodward... - Page 23 Remember to limit cranking to three 30-second attempts with a cool-down period of two minutes (120 seconds) between each cranking attempt. After three cranking attempts, the solenoid must be allowed to cool down to ambient temperature (5½ minutes total elapsed time) before any further attempts are made. Woodward...
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Page 24: Solenoid Linkage Adjustment
Linkage Adjustment A misaligned linkage may not allow the plunger to bottom out. Failure to “bottom out” will cause an internally switched solenoid to burn out and an externally switch solenoid to “drop out”. Figure 9. Solenoid with Connecting Rod Woodward... - Page 25 Plunger travel must be checked, especially when a bead chain or cable is used in a connecting device. The plunger travel must be limited to the solenoid’s rated stroke when it is de-energized. An “L” bracket can be used to limit the plunger travel. Woodward...
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Page 26: Overload Protection
Externally Switched Solenoids ® Woodward recommends using a timer device such as a Coil Commander protect solenoids from permanent damage. Coil Commanders limit pull coil on-time to prevent solenoid burnout due to engine overcranking and misaligned linkages. -
Page 27: Chapter 4. Service Options
Product Service Options The following factory options are available for servicing Woodward equipment, based on the standard Woodward Product and Service Warranty (5-01-1205) that is in effect at the time the product is purchased from Woodward or the service is performed: •... -
Page 28: Returning Equipment For Repair
Warranty 5-01-1205). This option is applicable to mechanical products only. Returning Equipment for Repair If a control (or any part of an electronic control) is to be returned to Woodward for repair, please contact Woodward in advance to obtain a Return Authorization Number. -
Page 29: Replacement Parts
Fax—+1 (970) 498-3058 For assistance outside North America, call one of the following international Woodward facilities to obtain the address and phone number of the facility nearest your location where you will be able to get information and service. Facility... -
Page 30: Engineering Services
The field engineers are experienced both on Woodward products as well as on much of the non-Woodward equipment with which our products interface. For field service engineering assistance, please contact us via telephone, email us, or use our website and reference Customer Services and then Technical Support. -
Page 31: Technical Assistance
Type of Fuel (gas, gaseous, steam, etc) Rating Application Control/Governor Information Please list all Woodward governors, actuators, and electronic controls in your system: Woodward Part Number and Revision Letter Control Description or Governor Type Serial Number Woodward Part Number and Revision Letter... - Page 32 Phone +1 (970) 482-5811 • Fax +1 (970) 498-3058 Email and Website—www.woodward.com Woodward has company-owned plants, subsidiaries, and branches, as well as authorized distributors and other authorized service and sales facilities throughout the world. Complete address / phone / fax / email information for all locations is available on our website.
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