Instruction/ maintenance manual of the product 91 Demco
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Page 1 DOING OUR BEST TO PROVIDE YOU THE BEST ASSEMBLY CALIBRATION OPERATION REPLACEMENT PARTS READ complete manual CAREFULLY BEFORE attempting operation. 1-04 BH20023, Rev 1 DEMCO Dethmers Mfg. Co. 4010 320th St. P .O. Box 189 Boyden, IA 51234 PH: (712) 725-2311 Toll Free: 1-800-543-3626 FAX: 1-800-845-6420 www.
Page 2 Model DA91 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 3 BRAKES ON DO NOT T O W BRAKES OFF T O W ABLE BH21003 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 4 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 assembly of equipment.
Page 5 WELDING The weight rating of the coupler is dependent on the correct bolts being used. Y ou must use the bolts provided with the product. If you are miss- ing bolts, refer to your Operator í s Manual and ob- tain replacements from Demco, or use the exact size, grade, and number of bolts as specified.
Page 6 DEMCO MODEL DA91 BRAKE ACTUA T OR INSTALLATION (SEE PAGE 10 FOR BREAKDOWN AND REFERENCE NUMBERS) Model DA91 is completely assembled and ready to bolt or weld into place. 1 . Standard DA91 actuators come with a variety of mounting channels. (see Page 11) 2.
Page 7 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 ownerís manual.
Page 8 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 9 DEMCO BRAKE PRODUCTS - LIMITED W ARRANTY CONTINUED DISCLAIMER This warranty does not cover: a) normal wear and tear. b) road film or gravel damage to paint. c) paint. d) rust damage. e) any Demco brake product that has been loaded in excess of load capacity stated on identifica- tion label.
Page 10 ACTUA TOR P ARTS BREAKDOWN 5221 Coupler Repair Kit 2î Ball Coupler RATED AT 6000# not included 29 REF. NO. PART NO. QTY. DESCRIPTION Model 91 ACTUATOR PARTS LIST 1. 05432 1 6000# 2" Ball Coupler (zinc plated) 2. 01896 3 1/2"-13UNC x 4" Hex Head Bolt (gr.
Page 11 45 43 43 51 44 47 46 54 53 52 44 48 56 56 54 54 54 55 REF. NO. PART NO. QTY. DESCRIPTION PARTS LIST 37. 11101-?? 1 Outer Case w/ no mounts 38. 11171-?? 1 Outer Case w/ plate 39. 11163-?? 1 Outer Case w/ 50 mount 40. 11168-?? 1 Outer Case w/ 3 hole mount 41.
Page 12 DETHMERS MFG. COMPANY P.O. BOX 189 4010 320th St., BOYDEN, IA. 51234 PH: (712) 725-2311 FAX: (712) 725-2380 TOLL FREE: 1-800-54DEMCO (1-800-543-3626) www.
An important point after buying a device Demco 91 (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 91 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 91 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Demco 91 you will learn all the available features of the product, as well as information on its operation. The information that you get Demco 91 will certainly help you make a decision on the purchase.
If you already are a holder of Demco 91, 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 91.
However, one of the most important roles played by the user manual is to help in solving problems with Demco 91. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Demco 91 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
