Instruction/ maintenance manual of the product ACTUATOR DA20 Demco
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Page 1 OPERA T ORS MANUAL ACTUA T OR DA20 Dethmers Manufacturing Company Dethmers Manufacturing Company Dethmers Manufacturing Company Dethmers Manufacturing Company Dethmers Manufacturing Company DOING OUR BEST TO PROVIDE YOU THE BEST ASSEMBLY CALIBRATION OPERATION REPLACEMENT PARTS READ complete manual CAREFULLY BEFORE attempting operation.
Page 2 NOTES.
Page 3 Model DA20 is a heavy duty surge brake actuator for trailers with two or four wheels. When brakes are applied on the towing vehicle, forward inertia of trailer toward towing vehicle applies brakes on trailer in direct relation to manner brakes are applied on towing vehicle.
Page 4 SAFETY T AKE NOTE! THIS SAFETY ALERT SYMBOL FOUND THROUGHOUT THIS MANUAL IS USED T O CALL YOUR A TTENTION TO INSTRUCTIONS INVOL VING YOUR PERSONAL SAFETY AND SAFETY OF OTHERS. F AILURE T O FOLLOW THESE INSTRUCTIONS CAN RESUL T IN INJUR Y OR DEA TH.
Page 5 SAFETY ...YOU CAN LIVE WITH IT EQUIPMENT SAFETY GUIDELINES Every year many accidents occur which could have been avoided by a few seconds of thought and a more careful approach to handling equipment. Y ou the operator , can avoid many accidents by observing and following precautions in this section.
Page 6 SAFETY SIGN LOCA TIONS Types of safety sign and locations on equipment are shown in illustration below. Good safety requires that you familiarize yourself with various safety signs, type of warning, and area or particular function related to that area, that requires your SAFETY AWARENESS.
Page 7 SAFETY SIGN CARE • Keep safety signs clean and legible at all times. • Replace safety signs that are missing or have become illegible. • Replacement parts that displayed a safety sign should also display safety sign. • Safety signs are available from your distributor, dealer parts department, or factory.
Page 8 BEFORE OPERA TION: • Carefully study and understand this manual. • Always wear protective clothing and substantial shoes. • Give equipment a visual inspection for any loose bolts, worn parts, or cracked welds, and make necessary repairs. Follow maintenance safety instructions included in this manual.
Page 9 • Beware of bystanders, PARTICULARLY CHILDREN! Always look around to make sure it is safe to start engine of towing vehicle or move equipment. This is particularly important with higher noise levels, as you may not hear people shouting. • NO PASSENGERS ALLOWED - Do not carry passengers anywhere on or in equipment.
Page 10 FOLLOWING OPERA TION • Following operation, or when unhitching, stop towing vehicle, set brakes, shut off the engine and remove ignition key . • Store unit in an area away from human activity. • Do not permit children to play on or around stored unit.
Page 11 • Watch for obstructions overhead and side to side while transporting. • Always operate equipment in a position to provide maximum visibility at all times. Make allowances for increased length and weight of equipment when making turns and/or stopping.
Page 12 BOL T T ORQUE T ORQUE DA T A FOR ST ANDARD NUTS, BOL TS, AND CAPSCREWS. T ighten all bolts to torques specified in chart unless otherwise noted. Check tightness of bolts periodically , using bolt chart as guide. Replace hardware with same grade bolt.
Page 13 Model DA20 ACTUA T OR P ARTS 5398 Master Cylinder Repair Kit (gasket 05681 included) 1 2 3 4 4 4 4 4 5 5 6 8 8 9 9 9 9 10 11 16 19 22 7 23 36 30 30 13 21 17 4 24 14 15 14 15 24 18 20 29 30 36 .
Page 14 09537 09486 03884 07718 07105 03412 03548 OUTER CASE OPTIONS.
Page 15 DEMCO MODEL DA20 BRAKE ACTUA T OR INSTALLATION Model DA20 is completely assembled and ready to bolt into place. 1. DA20 actuator comes with various mounting channels available. 2. Connect and tighten all brake lines. 3. Fill master cylinder (#18) with DOT 3 or 4 brake fluid.
Page 16 MAINTENANCE 1. Frequently check brake fluid level. (Fluid must be approved, clean and uncontaminated.) 2. Make sure actuator mounting bolts are secure. 3. Inspect actuator, replace bent, worn or damaged parts. 4. Be constantly aware of systems braking quality, make periodic checks as described in brakes owners manual.
Page 17 1. Extent and Duration of this Warranty: Your Demco brake product is warranted to be free from defects in materials and workmanship under normal use and service for a period of one year after date of purchase by original owner when properly installed, used and maintained by purchaser.
Page 18 DEMCO BRAKE PRODUCTS - LIMITED W ARRANTY CONTINUED DISCLAIMER This warranty does not cover: 1) normal wear and tear. 2) road film or gravel damage to paint. 3) paint. 4) rust damage. 5) any Demco brake product that has been loaded in excess of load capacity stated on identification label.
Page 19 NOTES.
Page 20 DETHMERS MFG. COMPANY P.O. BOX 189 4010 320th St., BOYDEN, IA. 51234 PH: (712) 725-2311 or (712) 725-2302 FAX: (712) 725-2380 TOLL FREE: 1-800-54DEMCO (1-800-543-3626) www.
An important point after buying a device Demco ACTUATOR DA20 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Demco ACTUATOR DA20 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Demco ACTUATOR DA20 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Demco ACTUATOR DA20 you will learn all the available features of the product, as well as information on its operation. The information that you get Demco ACTUATOR DA20 will certainly help you make a decision on the purchase.
If you already are a holder of Demco ACTUATOR DA20, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Demco ACTUATOR DA20.
However, one of the most important roles played by the user manual is to help in solving problems with Demco ACTUATOR DA20. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Demco ACTUATOR DA20 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
