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Demco 91 manual

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Table of contents for the manual

  • Page 1

    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.demco-produc[...]

  • Page 2

    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. Brake towing vehicle hard and brakes on trailer are applied hard. Ma[...]

  • Page 3

    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

    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. Bolt T orque for Standard bolts * GRADE 2 GRADE 5 GRADE[...]

  • Page 5

    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. Us- ing the wrong size, grade, or number[...]

  • Page 6

    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. Connect and tighten all brake lines. 3 . Fill master cylinder (#21) with DOT 3 or 4 br[...]

  • Page 7

    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. Consult certifie[...]

  • Page 8

    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. When this Demco brake product is used as part of complete[...]

  • Page 9

    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. f) Accessory parts, materials or components. Warran[...]

  • Page 10

    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.5) 3. 02178 3 1/2"-13UNC Nylon Insert Lock Nut 4. 05441-95 1 Front [...]

  • Page 11

    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. 11170-?? 1 Outer Case w/ universal holes 42. 11169-?? 1 Outer Case w/ 2 hole mou[...]

  • Page 12

    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.demco-products.com[...]