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Demco ACTUATOR DA20 - page 1
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. 3-23- ...
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Demco ACTUATOR DA20 - page 2
Page 2 NOTES ...
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Demco ACTUATOR DA20 - page 3
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. Brake towing vehicle hard and brakes on trailer are applied hard. Ma ...
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Demco ACTUATOR DA20 - page 4
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. THIS SYMBOL MEANS A TTENTION BECOME ALERT YOUR SAFETY IS INVOL VED! SIGNAL WORDS Note use foll ...
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Demco ACTUATOR DA20 - page 5
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. T o avoid personal injury , study the foll ...
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Demco ACTUATOR DA20 - page 6
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. BRAKES ON DO NOT T O W BRAKES OFF T OW ABLE 10/99 BH2 ...
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Demco ACTUATOR DA20 - page 7
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. How to install safety signs: ...
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Demco ACTUATOR DA20 - page 8
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. • Be sure there are no tools lyin ...
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Demco ACTUATOR DA20 - page 9
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. • Do not clean, lubri ...
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Demco ACTUATOR DA20 - page 10
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. • Make sure all parked units are on a hard, level surface and engage all safety de ...
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Demco ACTUATOR DA20 - page 11
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. • Good Maintenance is your responsibility . Poor maintenance is an invitation to tro ...
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Demco ACTUATOR DA20 - page 12
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. NOTE: Unless otherwise specified, high-strength Grade 5 hex bolts are used throughout assem ...
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Demco ACTUATOR DA20 - page 13
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 30 27 27 25 26 26 RATED AT 20000# RATED AT 12500# 32 RATED AT 20000# RATED AT 10000# 28 30 30 36 30 31 26 26 33 27 RATED AT 20000# Model DA20 ACTUA T ...
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Demco ACTUATOR DA20 - page 14
Page 14 09537 09486 03884 07718 07105 03412 03548 OUTER CASE OPTIONS ...
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Demco ACTUATOR DA20 - page 15
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. 4. Bleed brake system using a pressure-type brake bleeder or manua ...
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Demco ACTUATOR DA20 - page 16
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. Consult certified brak ...
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Demco ACTUATOR DA20 - page 17
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. When this Demco brake product is used as part of complet ...
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Demco ACTUATOR DA20 - page 18
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. 6) Accessory parts, materials or components. Warrant ...
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Demco ACTUATOR DA20 - page 19
Page 19 NOTES ...
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Demco ACTUATOR DA20 - page 20
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.demco-products.com ...
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