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Century 974W25 Installation, Operation, Maintenance, Parts

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CENTURY
®
L E G E N D A R Y
OWNER'S MANUAL
Century Wrecker
Item No. 974W25
(Century Model 925)
INSTALLATION, OPERATION, MAINTENANCE & PARTS
NOTE: MANUAL including SPECIFICATIONS, subject to change without notice
All ratings specified are based on structural factors only,
not vehicle capacities or capabilities.
CENTURY
®
A Division of Miller Industries Towing Equipment Inc.
P.O. Box 120 • 8503 Hilltop Drive
Ooltewah, Tennessee 37363
FORM NO. 7205001
7 / 95
Phone (423)238-4171 • FAX (423)238-5371
PRICE $15.00

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Summary of Contents for Century 974W25

  • Page 1 ® L E G E N D A R Y OWNER’S MANUAL Century Wrecker Item No. 974W25 (Century Model 925) INSTALLATION, OPERATION, MAINTENANCE & PARTS NOTE: MANUAL including SPECIFICATIONS, subject to change without notice All ratings specified are based on structural factors only, not vehicle capacities or capabilities.
  • Page 2 CENTURY’s obligation under this warranty, statutory or otherwise, is limited to the repair or replacement at the CENTURY factory, or at a point designated by CENTURY, of such part or parts as shall appear upon inspection by CENTURY to be defective in material or workmanship. New or remanufactured parts will be used for any replacement at CENTURY’s option.
  • Page 3 OWNER, USER AND OPERATORS: CENTURY appreciates your choice of our wrecker for your ® application. Our number one priority is user safety which is best achieved by our joint efforts. We feel that you can make a major contribution to safety if you, as the equipment owner and operator: 1.
  • Page 4 It is assumed by CENTURY that the Owner/Operator has thorough knowledge of the accepted and lawful retrieval and towing methods as dictated by his city, county, or state. CENTURY rejects any liability claim that may result from the incorrect or unlawful application of its equipment.

  • Page 5: Table Of Contents

    TABLE OF CONTENTS (cont’d) Section VI - PARTS (cont’d) 925 WRECKER BOOM HYDRAULICS VI-14 & VI-15 WINCH MOTOR HYDRAULICS VI-16 HYDRAULIC CYLINDERS WRECKER VI-17 FORMULA III VI-18 & VI-19 PUMP & FILTER HYDRAULICS VI-20 & VI-21 CONTROLS & CROSSRODS VI-22 & VI-23 HYDRAULIC WINCH ASSEMBLY VI-24 &...
  • Page 6 NOTES...
  • Page 7 These recommendations are contained in this manual. Century is not responsible for the results of any unsafe practice of wrecker operators. Furthermore, the division is not responsible for the failure of the wrecker or its accessories resulting from improper maintenance.
  • Page 8 Section I - SAFETY PRECAUTIONS (cont’d) 1.1 Improper use of this equipment can be dangerous! Incorrect operation can result in bodily injury to the operator and bystanders. Therefore, a thorough understanding of the "operating principles" and "operating instructions" as found in this manual is essential. 1.2 Study each job to be done.
  • Page 9 Section I - SAFETY PRECAUTIONS (cont’d) INSPECT ALL HYDRAULIC HOSES, ESPECIALLY THOSE WHICH FLEX OR MOVE IN SERVICE, AND REPLACE IF NECESSARY. SECURE ALL CAPS AND FILLER PLUGS FOR ALL SYSTEMS. 6. YOUR CLOTHING SHOULD BE RELATIVELY CLOSEFITTING. 7. ALWAYS WEAR PROTECTIVE ITEMS SUCH AS SAFETY GLASSES, GLOVES, REFLECTIVE CLOTHING AND SAFETY SHOES.
  • Page 10 Section I - SAFETY PRECAUTIONS (cont’d) ONLY AUTHORIZED AND TRAINED PERSONNEL SHOULD BE PERMITTED TO OPERATE THIS WRECKER UNSUPERVISED TRAINED PERSONNEL ARE THOSE WHO HAVE WORKED UNDER EXPERIENCED SUPERVISION AND HAVE PERFORMED ALL WRECKER MANEUVERS, HAVE READ THE MOUNTING, OPERATING AND MAINTENANCE MANUAL, WARNINGS AND PRECAUTIONS, AND UNDERSTAND AND HAVE HAD EXPLAINED TO THEM BY THEIR EMPLOYER THE HAZARDS OF OPERATING THE WRECKER.
  • Page 11 Section I - SAFETY PRECAUTIONS (cont’d) SAFETY TIPS Death or serious injury can occur when working near power lines. Learn - beforehand - as much about your working area as possible. Be sure that exact locations of overhead power lines, and other obstructions or hazards are known.
  • Page 12 Section I - SAFETY PRECAUTIONS (cont’d) SAFETY TIPS Proper technique for using wire rope clips. USE CABLE CLIPS ONLY IN THE EVENT OF AN EMERGENCY FIELD TEMPORARY REPAIR. RIGHT WRONG 1. Turn back rope length specified in the chart. Apply first clip so U-bolt is no less than the saddle width from the dead end.
  • Page 13 Section I - SAFETY PRECAUTIONS (cont’d) SAFETY TIPS Don’t use a wrecker that has not been properly maintained. Pay special attention to wrecker mounting bolts, cable condition, and lubrication of moving parts. Don’t use damaged cables on your wrecker. Become familiar with the various types of cable damage and carefully inspect all cables being used in a recovery...
  • Page 14 Section I - SAFETY PRECAUTIONS (cont’d) SAFETY TIPS Don’t expect your wrecker to tow loads equal to the wrecker rating. Wrecker ratings apply to loads imposed during recovery with the wrecker properly stabilized. Don’t pull a load with your winch without making absolutely sure that the winch drum clutch is FULLY engaged.
  • Page 15 Section I - SAFETY PRECAUTIONS (cont’d) SAFETY TIPS Don’t get under a raised vehicle or load unless it has adequate safety blocks in place. Don’t exceed WORKING LIMIT ratings of cable. Use breaking strength ratings only for selecting replacement cable. Don’t tie down the front end of your wrecker for recovery work or heavy lifts.
  • Page 16 Section I - SAFETY PRECAUTIONS (cont’d) SAFETY TIPS Don’t lower out board legs or rear jack spades unless the area under them is clear. Pay particular attention to keeping this area clear. Don’t use rear spades on paved surfaces unless you are willing to accept responsibility for possible damage to such surfaces.
  • Page 17 Section I - SAFETY PRECAUTIONS (cont’d) SAFETY TIPS Don’t completely unwind all cable from a winch while loaded. Keep AT LEAST five wraps on the drum. Don’t operate your wreckers engine faster than recommended. Excessive speeds can damage PTO shafts, hydraulic pumps, and winches.
  • Page 18 Section I - SAFETY PRECAUTIONS (cont’d) SAFETY TIPS Don’t use towing forks that are not of proper size for pick-up requirements. After you have hooked up a vehicle for towing, don’t start the tow until you have double checked the hook-up, installed safety chains, and released the parking brakes of the towed vehicle.
  • Page 19 Section I - SAFETY PRECAUTIONS (cont’d) SAFETY TIPS Don’t tow a vehicle on its front wheels if they are damaged. Don’t tow a vehicle on its front wheels unless the steering wheel is secured with the front wheels straight ahead. Don’t tow a vehicle at night without proper signal lights on the towed vehicle and the wrecker.
  • Page 20 Section I - SAFETY PRECAUTIONS (cont’d) SAFETY TIPS Don’t move wrecker or extend boom where overhead power lines may be encountered. Don’t continue to wind in winch cable after the hook is against the boom end. SAFE TOWING There are two key factors in safe towing: 1.
  • Page 21 Section I - SAFETY PRECAUTIONS (cont’d) SAFE TOWING To use the formula, multiply the unladen weight at the front axle by .6. Multiply the result by the wheel bases. Then divide that result by the overhang. So, you should calculate the maximum lifted load for each tow truck, using this formula, post those limits in the truck and instruct each driver to strictly observe those limits.
  • Page 22 NOTES...
  • Page 23 Section II - SPECIFICATIONS 2.1 CERTIFICATION LABEL Federal law requires that the final stage manufacturer, i.e., that person or company installing new equipment on a new chassis, must certify the completed vehicle by obtaining, completing and affixing to the door post on the driver’s side of the vehicle, a CERTIFICATION LABEL similar to the one shown.
  • Page 24 Each CENTURY 925 Wrecker will have a SERIAL NUMBER/ SPECIFICATION LABEL mounted to the wrecker base and each CENTURY Formula III Wheel Lift will have a SERIAL NUMBER LABEL mounted on the outer boom support. Additionally, each CENTURY 925GSA Wrecker will have a DATA RATING PLATE mounted to the wrecker body.
  • Page 25 Section II - SPECIFICATIONS (Cont’d) 2.2 SERIAL NUMBERS/SPECIFICATION LABELS (cont’d) FIGURE 2.4 (DATA RATING PLATE) 2.3 SPECIFICATIONS - MODEL 925 WRECKER 25 ton hydraulic wrecker with dual hydraulic winches, full power 2-stage boom, 96" wide heavy-duty body for 138" C.A. single axle chassis.
  • Page 26 Section II - SPECIFICATIONS (Cont’d) 2.3 SPECIFICATIONS - MODEL 925 WRECKER (cont’d) (1) At maximum boom elevation of 45 degrees above horizontal. (2) At boom angle of 1 degree above horizontal. (3) At boom angle of 10 degrees above horizontal. Ratings are based on structural factors only! Not vehicle capacity or capabilities.
  • Page 27 Section II - SPECIFICATIONS (Cont’d) 2.6 STANDARD EQUIPMENT • Twin Hydraulic Pumps • Dual Variable-Speed Hydraulic Winches • 200’ of Wire Rope Each Drum • 360° Directional Boom Sheave System • Power Boom Elevation • Dual Side-by-Side Elevation Cylinders with Counterbalance Valve •...
  • Page 28 NOTES...
  • Page 29 Section III - OPERATIONAL FUNCTIONS WRECKER 3.1 Your new wrecker is fully hydraulic. It receives its power by means of a Power Take-Off/Pump combination mounted to the vehicle transmission . Since the pump is attached to the PTO, no drive line or universal joint is required.
  • Page 30 Section III - OPERATIONAL FUNCTIONS WRECKER (cont’d) 3.3 The Control Handles are clearly marked as to their functions and directions. Movement of the control handles meters the flow of oil through valves to control the speed of each function. 3.4 The Vernier Throttle Control, located at the left control station, is used to vary the speed of the truck engine to govern the maximum speed of the winches and cylinders.
  • Page 31 Section III - OPERATIONAL FUNCTIONS WRECKER (cont’d) 3.7 Before operating your wrecker, remove the Shipping Plugs from the Winch Vent Cap. See Figure 3.5. FIGURE 3.5 NOTE CHECK OIL LEVEL IN WINCHES BEFORE ANY OPERATION. FILL TO PROPER LEVEL WITH REQUIRED GEAR LUBRICANT AS NEEDED.
  • Page 32 Section III - OPERATIONAL FUNCTIONS WRECKER (cont’d) FIGURE 3.6 3.9 Always use SAFETY CHAINS on all towing and lifting applications. The safety chains are located on the top rear of the wrecker body. See Figure 3.7. Refer to Section 4.8 for proper safety chain procedures.
  • Page 33 Section III - OPERATIONAL FUNCTIONS WRECKER (cont’d) USE SAFETY CHAINS ON ALL TOWING AND LIFTING APPLICATIONS III-5...
  • Page 34 NOTES...
  • Page 35 Section IIIA - OPERATIONAL FUNCTIONS WHEEL LIFT 3A.1 Each function of the FORMULA III Wheel Lift can be controlled from either of the dual Control Stations located at the rear of the wrecker body. See Figure 3A.1. FIGURE 3A.1 3A.2 The Control Handles are clearly marked as to their functions and directions.
  • Page 36 Section IIIA - OPERATIONAL FUNCTIONS WHEEL LIFT (cont’d) 3A.6 The optional Hand-Held Remote Control Unit electrically meters the flow of oil through valves to control each related function. The buttons of the remote control unit are clearly marked for each function and direction.
  • Page 37 Section IIIA - OPERATIONAL FUNCTIONS WHEEL LIFT (cont’d) 3A.7 Lifting Forks and other Wheel Lift Towing and Lifting Accessories are located in the left hand Tool Box of the wrecker body. See Figure 3A.3. FIGURE 3A.3 LIFT BRACKET DESIGNATION FORK ADAPTERS FORK, SHORT IIIA-3...
  • Page 38 NOTES...
  • Page 39 Section IV - OPERATING INSTRUCTIONS WRECKER 4.1 For reasons of safety, it is important that the Owner(s) and Operator(s) should become thoroughly familiar with the controls and functions of the wrecker before attempting any operation. 4.2 HYDRAULIC WINCHES The hydraulic winches are to be used in retrieving and lifting a vehicle for transport.
  • Page 40 Section IV - OPERATING INSTRUCTIONS WRECKER (cont’d) 4.3 PREPARING TO LOAD VEHICLE (cont’d) NEVER DRIVE TRUCK ON STREET WITH PTO ENGAGED, THIS CAN CAUSE PUMP FAILURE DUE TO OVER-SPEED AND OVERHEATING. (c) Adjust engine speed to desired RPM using the Vernier Throttle Control located on the left hand side of the wrecker body.
  • Page 41 Section IV - OPERATING INSTRUCTIONS WRECKER (cont’d) 4.5 BOOM ELEVATION (cont’d) NOTE IN THE EVENT OF HYDRAULIC PRESSURE LOSS, THE BOOM WILL REMAIN ELEVATED DUE TO THE HOLDING VALVE ATTACHED TO THE LIFT CYLINDERS. 4.6 HYDRAULIC BOOM EXTENSION Extend boom to desired length by use of the Boom "IN/OUT" Control.
  • Page 42 Section IV - OPERATING INSTRUCTIONS WRECKER (cont’d) 4.7 MOUNTING VEHICLE TO WRECKER (cont’d) FIGURE 4.4 (b) Lift vehicle to be towed by retrieving cable slowly with use of Cable "IN/OUT" Control. See Figure 4.5. FIGURE 4.5 NOTE WHEN TOWING FROM REAR DRIVE AXLE, PUT VEHICLE IN GEAR AND ENGAGE PARKING BRAKE.
  • Page 43 Section IV - OPERATING INSTRUCTIONS WRECKER (cont’d) 4.7 MOUNTING VEHICLE TO WRECKER (cont’d) USE SAFETY CHAINS ON ALL TOWING AND LIFTING APPLICATIONS 4.8 SAFETY CHAIN HOOK-UP PROCEDURES (a) Extend free end of Safety Chain from storage caddy at top rear of wrecker body. See Figure 4.6. FIGURE 4.6 IV-5...
  • Page 44 Section IV - OPERATING INSTRUCTIONS WRECKER (cont’d) 4.8 SAFETY CHAIN HOOK-UP PROCEDURES (cont’d) (b) Route free end of chain to vehicle to be towed and attach to chassis around axle, leaf springs, frame or "A" frame. See Figures 4.7 thru 4.10. FIGURE 4.7 AXLE HOOK-UP FIGURE 4.8 LEAF SPRING HOOK-UP IV-6...
  • Page 45 Section IV - OPERATING INSTRUCTIONS WRECKER (cont’d) 4.8 SAFETY CHAIN HOOK-UP PROCEDURES (cont’d) FIGURE 4.9 FRAME HOOK-UP & FIGURE 4.10 A-FRAME HOOK-UP (c) Pull excess chain back to storage caddy. While holding chain securely, feed any excess chain back into storage caddy until enough slack is left in chain for sharp turns.
  • Page 46 Section IV - OPERATING INSTRUCTIONS WRECKER (cont’d) 4.8 SAFETY CHAIN HOOK-UP PROCEDURES (cont’d) SAFETY CHAIN MUST BE SEATED IN BOTTOM OF SLOT BEFORE ATTEMPTING TO TOW VEHICLE. SEE FIGURE 4A.11 FIGURE 4.11 IV-8...
  • Page 47 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT 4A.1 For reasons of safety, it is important that the Owner/Operator(s) of the FORMULA III Wheel Lift become thoroughly familiar with its controls, components and load requirements before attempting any operation. 4A.2 CONTROLS The Control Levers are located at the rear of the body on both the left and right sides.
  • Page 48 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.4 WHEEL LIFT TOWING PREPARATION (a) Loosen "T" handle and extend outer crosstube until the tire restraint retainers are just beyond the outer sidewall of tires on the vehicle to be towed. See Figure 4A.2. FIGURE 4A.2 (b) Lower Wheel Lift to ground, then raise until Wheel Lift just clears ground level by use of the Wheel Lift Lift "UP/DOWN"...
  • Page 49 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.4 WHEEL LIFT TOWING PREPARATION (cont’d) (c) Extend Wheel Lift Boom to maximum stroke, then retract approximately 3 inches by use of the Wheel Lift Extend "IN/OUT" Control. See Figure 4A.4. FIGURE 4A.4 (d) Due to the position of the disabled vehicle it may be necessary to tilt the Wheel Lift to obtain the proper position for pick-up.
  • Page 50 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.5 VEHICLE HOOK-UP (cont’d) (b) Lower Wheel Lift to ground and extend boom until it is firmly against tires of disabled vehicle. See Figure 4A.6. FIGURE 4A.6 (c) Disengage the tire restraint Plunger by pulling out and rotating 90°.
  • Page 51 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.5 VEHICLE HOOK-UP (cont’d) (d) Insert Tire Restraint into crosstube until it is firmly against the rear of the tire. See Figure 4A.8. FIGURE 4A.8 (e) Engage Plunger and adjust the tire restraint until the plunger engages in the appropriate hole in the tire restraint.
  • Page 52 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.6 SECURING VEHICLE TO BE TOWED (a) Release Safety Strap Ratchet by releasing lock on Ratchet Lock Handle. See Figure 4A.9. FIGURE 4A.9 (b) With Ratchet Lock released, pull handle all the way up and pull out the desired length of Safety Strap.
  • Page 53 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.6 SECURING VEHICLE TO BE TOWED (cont’d) NOTE IF TOWING A TRUCK, OR A VEHICLE WITH LARGER THAN 15" TIRES, IT WILL BE NECESSARY TO USE THE SAFETY STRAP EXTENSION THAT IS PROVIDED. SEE FIGURE 4A.11 FOR APPLICATION METHOD.
  • Page 54 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.6 SECURING VEHICLE TO BE TOWED (cont’d) (e) Repeat Safety Strap installation on opposite side of vehicle. WHEN TOWING FROM REAR AXLES, SECURE STEERING WHEEL OF VEHICLE IN TOW. DO NOT RELY ON THE STEERING WHEEL LOCKING DEVICE.
  • Page 55 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.7 SAFETY CHECK PROCEDURES (a) In the event of a sudden stop, follow the procedures below for reasons of safety in towing. 1. Pull off road and check Safety Straps to make certain they are tight and secure.
  • Page 56 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.9 HOOK-UP FOR VEHICLE WITH FLAT TIRE(S) (cont’d) (f) Extend the Wheel Lift Boom as far as possible against the flat tire(s). This should allow the crossbar to compress the tire completely. See Figure 4A.13. FIGURE 4A.13 (g) Install tire restraint onto flat tire.
  • Page 57 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.9 HOOK-UP FOR VEHICLE WITH FLAT TIRE(S) (cont’d) (i) Raise the vehicle and place blocks on timbers beneath the flat tire. Lower the Wheel Lift allowing the tire to rest on the blocking. (j) Engage parking brake and place transmission in gear (park) of the disabled vehicle.
  • Page 58 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.10 OUTER CROSS TUBE REMOVAL (a) Loosen "T" Handles and fully extend Outer Cross Tubes. (b) Insert a screwdriver or 1/4" rod into Stop Rod Hole located beside "T" Handle. See Figure 4A.16. FIGURE 4A.16 (c) While pushing in to release Stop Rod, pull outer crosstube off the crossbar.
  • Page 59 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.11 TOW FORK ADAPTERS (cont’d) FIGURE 4A.17 NOTE THE FORK ADAPTERS CAN BE PLACED IN ANY OF FOUR (4) POSITIONS AND ANY LOCATION ON THE CROSSBAR. SEE FIGURE 4A.18. FIGURE 4A.18 IVA-13...
  • Page 60 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.12 TOW FORK & ADAPTER APPLICATIONS (a) Align Wheel Lift with disabled vehicle. NOTE STEPS (b) THROUGH (d) ARE NOT NECESSARY PERMITTING THE AXLE IS HIGH ENOUGH TO ALLOW EXTENSION OF BOOM WITH FORKS AND ADAPTERS INSTALLED ON CROSSBAR.
  • Page 61 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.12 TOW FORK & ADAPTER APPLICATIONS (cont’d) FIGURE 4A.19 USE SAFETY CHAINS ON ALL TOWING AND LIFTING APPLICATIONS (i) Raise vehicle to desired height for towing. (j) Remove any blocks previously placed under the tires. (k) Retract Boom pulling disabled vehicle as close to the Wheel Lift body as possible while maintaining enough distance for sharp turns.
  • Page 62 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.12 TOW FORK & ADAPTER APPLICATIONS (cont’d) SAFETY CHAIN MUST BE SEATED IN BOTTOM OF SLOT BEFORE ATTEMPTING TO TOW VEHICLE. SEE FIGURE 4A.20 FIGURE 4A.20 4A.13 SPRING LIFT BRACKETS (a) Align Wheel Lift with disabled vehicle. (b) Position fork adapters in desired configuration on crossbar, secure them in place with retaining pins and install spring lift brackets into fork adapters.
  • Page 63 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.13 SPRING LIFT BRACKETS (cont’d) FIGURE 4A.21 (c) Extend boom until spring brackets are under front spring hangers of vehicle to be towed. It may be necessary to tilt the boom down in order for the spring brackets to clear the vehicle bumper.
  • Page 64 Section IVA - OPERATING INSTRUCTIONS WHEEL LIFT (cont’d) 4A.13 SPRING LIFT BRACKETS (cont’d) (e) Raise the boom until the spring lift brackets are properly seated under the springs at the front spring brackets. See Figure 4A.22. (f) Insert the spring lift bracket retaining pin through the lowest unobstructed hole of the spring lift bracket and secure with the safety pin.
  • Page 65 Section IVB - OPERATING INSTRUCTIONS STEERING WHEEL LOCK 4B.1 INSTRUCTIONS FOR INSTALLATION 1. Unlock anti-theft steering lock if vehicle is equipped with one. CARS WITH ANTI-THEFT STEERING LOCKS SHOULD NEVER BE TOWED ON THEIR FRONT WHEELS WHILE LOCKED IN THE TURNED POSITION 2.
  • Page 66 Section IVB - OPERATING INSTRUCTIONS STEERING WHEEL LOCK 4B.1 INSTRUCTIONS FOR INSTALLATION (cont’d) FAILURE TO PROPERLY SECURE AND TIGHTEN THE STEERING WHEEL LOCK COULD RENDER IT INEFFECTIVE DURING TRAVEL, RESULTING IN A DANGEROUS TOWING CONDITION 4B.2 INSTRUCTIONS FOR REMOVAL 1. Press button on buckle of steering wheel lock, releasing the latch.
  • Page 67 The smallest amount of grit, metal flake or other foreign material in the system can cause extensive damage to pumps, motors and valves. CENTURY has taken every measure to assure that each component and fitting was thoroughly cleaned before your unit was shipped to you.
  • Page 68 Section V - MAINTENANCE (cont’d) 5.3 LUBRICATION & PREVENTIVE MAINTENANCE (cont’d) (b) Check hydraulic oil level in reservoir and fill to proper level. Refer to 5.4, SUMMARY OF REQUIRED LUBRICANTS for recommended oils to use. (c) Replace hydraulic oil filters after first week of operation, then every three (3) months thereafter.
  • Page 69 RUBBER COMPONENTS, ESPECIALLY HOSES, BE REPLACED EVERY FIVE (5) YEARS REGARDLESS OF APPEARANCE. 5.5 CARE OF HYDRAULICS IN COLD CLIMATES Regions subject to continuous sub-zero or arctic climates require special hydraulic fluids. Contact CENTURY or your local supplier for information regarding specific temperature requirements.
  • Page 70 Section V - MAINTENANCE (cont’d) LUBRICATION CHART (Wrecker) 5.6 LUBRICATION - WRECKER 1. Control Handle Shafts - synthetic fortified grease 2. Cable - oily rag or approved cable lubricant 3. Winches - SAE 140 gear oil to proper level 4. Cylinder Pivot Bearings - synthetic fortified grease 5.
  • Page 71 Section V - MAINTENANCE (cont’d) LUBRICATION CHART (Wheel Lift) 5.7 LUBRICATION - WHEEL LIFT 1. Lift Cylinder Pivot Bearings - synthetic fortified grease 2. Upper Arm Assembly - synthetic fortified grease 3. Tilt Cylinder - synthetic fortified grease 4. Wheel Lift Outer Boom - synthetic fortified grease 5.
  • Page 72 Section V - MAINTENANCE (cont’d) MAINTENANCE RECORD DATE MECHANIC WEEKLY * MONTHLY QUARTERLY SERVICE PERFORMED * IMPORTANT: HYDRAULIC HOSES AND CABLES SHOULD BE INSPECTED WEEKLY FOR SIGNS OF ABRASION.
  • Page 73 Section V - MAINTENANCE (cont’d) MAINTENANCE RECORD DATE MECHANIC WEEKLY * MONTHLY QUARTERLY SERVICE PERFORMED * IMPORTANT: HYDRAULIC HOSES AND CABLES SHOULD BE INSPECTED WEEKLY FOR SIGNS OF ABRASION.
  • Page 74 NOTES...
  • Page 75 Section VI - PARTS This Section is provided by the manufacturer for the purpose of ordering any component part of the 925 Wrecker and Formula III Wheel Lift that may be required when part replacement is necessary. Be certain to use only original equipment replacement parts for warranty purposes as well as for keeping your 925 Wrecker and Formula III Wheel Lift in its original state and optimum operating capacities.
  • Page 76 Section VI - PARTS (cont’d) BODY ASSEMBLY - 925 GSA VI-2...
  • Page 77 Section VI - PARTS (cont’d) BODY ASSEMBLY - 925 GSA REF. PART REF. PART REQ’D NUMBER DESCRIPTION REQ’D NUMBER DESCRIPTION 0300110 SNAP RING, 1" 0400367 NUT, 1/4"-20 HEX NYLOK REF. 0300680 CYLINDER, REAR JACK 0400369 CLIP, 1/4" TINNERMAN 0300867 ILLUMINATOR, CONTROL STATION 0400392 NUT, 3/8"-16 HEX NYLOK 0301223...
  • Page 78 Section VI - PARTS (cont’d) FORMULA III WHEEL LIFT ASSEMBLY VI-4...
  • Page 79 Section VI - PARTS (cont’d) FORMULA III WHEEL LIFT ASSEMBLY REF. PART REF. PART NUMBER DESCRIPTION NUMBER DESCRIPTION 0300113 GREASE FITTING 0400508 LOCKWASHER, 5/8" HELICAL 0301197 COMPRESSION SPRING, CROSSBAR 0703231 STOP BLOCK, 2ND STAGE 0301398 BALL, 1-3/16" DIA. STEEL 0707034 STOP PLATE 0302561 SLIDE PAD...
  • Page 80 Section VI - PARTS (cont’d) FORMULA III WHEEL LIFT HYDRAULICS VI-6...
  • Page 81 Section VI - PARTS (cont’d) FORMULA III WHEEL LIFT HYDRAULICS REF. PART REQ. NUMBER DESCRIPTION 0300011 VALVE, 4 SPOOL 0300044 CONNECTOR, 6MJ-8MB 0300052 ELBOW, 8MJ-10MB90 0300055 HOSEBARB, 12C4-12MP 0300071 CLAMP, HOSE 1" 0300113 GREASE FITTING 0300165 HOSE ASSEMBLY, 91" H.P. 0301782 BRANCH TEE, 6MJ-6MJ-4MP 0300209...

  • Page 82: Section Vi - Parts (Cont'd)

    Section VI - PARTS (cont’d) FORMULA III WHEEL LIFT HYDRAULICS with OPTIONAL HAND HELD REMOTE VI-8...
  • Page 83 Section VI - PARTS (cont’d) FORMULA III WHEEL LIFT HYDRAULICS with OPTIONAL HAND HELD REMOTE REF. PART REQ. NUMBER DESCRIPTION 0300011 VALVE, 4 SPOOL 0300044 CONNECTOR, 6MJ-8MB 0300052 ELBOW, 8MJ-10MB90 0300055 HOSEBARB, 12C4-12MP 0300071 CLAMP, HOSE 1" 0300113 GREASE FITTING 0300165 HOSE ASSEMBLY, 91"...
  • Page 84 Section VI - PARTS (cont’d) FORMULA III OUTER CROSSTUBE & LIFT ADAPTERS VI-10...
  • Page 85 Section VI - PARTS (cont’d) FORMULA III OUTER CROSSBAR & LIFT ADAPTERS REF. PART REQ’D NUMBER DESCRIPTION 0300113 GREASE FITTING 0300341 KNOB, "L" BAR LOCK CONTROL 0301417 SPRING, PLUNGER PIN 0301681 EXTENSION,TIRE RESTRAINT 0301682 TIRE RESTRAINT 0400269 BOLT, 5/8"-11 X 4-1/2" CARRIAGE 0400393 NUT, 3/8"-16 HEX JAM 0400421...
  • Page 86 Section VI - PARTS (cont’d) 925 GSA WRECKER ASSEMBLY VI-12...
  • Page 87 Section VI - PARTS (cont’d) 925 GSA WRECKER ASSEMBLY REF. PART REF. PART REQ’D NUMBER DESCRIPTION REQ’D NUMBER DESCRIPTION 0300109 SNAP RING, 1-1/2" 0400392 NUT, 3/8"-16 NYLOK HEX 0300113 GREASE FITTING 0400408 NUT, 1/2"-13 NYLOK HEX 0300627 ELBOW, 90° STREET, 1-1/2" NPT 0400431 NUT, 3/4"-10 NYLOK HEX 0301110...

  • Page 88: Wrecker Boom Hydraulics

    Section VI - PARTS (cont’d) 925 GSA WRECKER BOOM HYDRAULICS VI-14...
  • Page 89 Section VI - PARTS (cont’d) 925 GSA WRECKER BOOM HYDRAULICS REF. PART REQ’D NUMBER DESCRIPTION REF. 0300011 VALVE, 4 SPOOL 0300041 CONNECTOR, 8MJ-8MB 0300113 GREASE FITTING 0300229 ELBOW, 8MJ-8MP90 0300657 HOSE ASSEMBLY, ELEV. CYLINDER, LOWER 0300710 CLAMP, CHK VALVE RETAINING, 6-1/2" 0300761 STRAIGHT ADAPTER 0300764...

  • Page 90: Winch Motor Hydraulics

    Section VI - PARTS (cont’d) WINCH MOTOR HYDRAULICS REF. PART REQ’D NUMBER DESCRIPTION REF. 0300011 VALVE, 4 SPOOL 0300041 CONNECTOR, 8MJ-8MB 0301112 MOTOR, HYDRAULIC 0301228 CONNECTOR, 10MJ-16MB 0301445 CONNECTOR, EXTENDED, 8MJ-8MBL REF. 0302179 VALVE, 5 SPOOL 0302490 HOSE ASSEMBLY 0400188 SCREW, 1/2-13 X 2"...

  • Page 91: Hydraulic Cylinders

    Section VI - PARTS (cont’d) HYDRAULIC CYLINDERS - WRECKER BOOM LIFT CYLINDER REF. PART REQ’D. NUMBER DESCRIPTION 0303091 CYLINDER, BOOM LIFT KIT, BOOM LIFT CYLINDER SEAL BOOM EXTEND CYLINDER REF. PART REQ’D. NUMBER DESCRIPTION 0302145 CYLINDER, BOOM EXTEND (COMPLETE) KIT, BOOM EXTEND CYLINDER SEAL VI-17...
  • Page 92 Section VI - PARTS (cont’d) HYDRAULIC CYLINDERS - WHEEL LIFT WHEEL LIFT LIFT CYLINDER REF. PART REQ’D. NUMBER DESCRIPTION 0303101 CYLINDER, LIFT (COMPLETE) 0304499 KIT, WHEEL LIFT LIFT CYLINDER SEAL WHEEL LIFT EXTEND CYLINDER REF. PART REQ’D. NUMBER DESCRIPTION HD130 CYLINDER, EXTEND (COMPLETE) HD163 KIT, WHEEL LIFT LIFT CYLINDER SEAL...
  • Page 93 Section VI - PARTS (cont’d) HYDRAULIC CYLINDERS - WHEEL LIFT WHEEL LIFT TILT CYLINDER REF. PART REQ’D. NUMBER DESCRIPTION 0303102 CYLINDER, TILT, LEFT 0303103 CYLINDER, TILT, RIGHT 0304500 KIT, BOOM LIFT CYLINDER SEAL VI-19...

  • Page 94: Pump & Filter Hydraulics

    Section VI - PARTS (cont’d) PUMP & FILTER HYDRAULICS VI-20...
  • Page 95 Section VI - PARTS (cont’d) PUMP & FILTER HYDRAULICS REF. PART REQ’D NUMBER DESCRIPTION REF. 0300011 VALVE, 4 SPOOL 0300052 ELBOW, 8MJ-8MB90 0300055 HOSE BARB, 12C4-12MP 0300071 CLAMP, HOSE, 1" 0300165 HOSE ASSEMBLY, HI PRESSURE 0300288 STREET ELBOW, 90 DEG., 1" 0300364 CLAMP, HOSE, 1"...

  • Page 96: Controls & Crossrods

    Section VI - PARTS (cont’d) CONTROLS & CROSSRODS VI-22...
  • Page 97 Section VI - PARTS (cont’d) CONTROLS & CROSSRODS REF. PART REQ’D NUMBER DESCRIPTION 0300122 GROMMET, SPLIT PLASTIC 0300834 KNOB, WINCH CABLE IN-OUT 0300835 KNOB, BOOM UP-DOWN 0300836 KNOB, JACK UP-DOWN 0300837 KNOB, BOOM EXTEND IN-OUT 0302856 KNOB, WHEEL LIFT TILT UP-DOWN 0302917 KNOB, WHEEL LIFT EXTEND IN-OUT 0302967...
  • Page 98 Section VI - PARTS (cont’d) WINCH ASSEMBLY VI-24...
  • Page 99 Section VI - PARTS (cont’d) WINCH ASSEMBLY REF. PART REF. PART REQ’D NUMBER DESCRIPTION REQ’D NUMBER DESCRIPTION 276033 SHIFTER ASSEMBLY 414571 CAPSCREW, 1/2-20 X 1 HX.HD. 299047 COUPLING, ASSEMBLY 414603 CAPSCREW, 1/2-20 X 1-3/4 HX.HD. ALL-THD 300048 ADAPTER 414606 CAPSCREW, 1/2-20 X 2 HX.HD. 414619 CAPSCREW, 1/2-20 X 2-1/2 HX.HD.

  • Page 100: Boom End Swivel Assembly

    Section VI - PARTS (cont’d) BOOM END SWIVEL ASSEMBLY (2 Req’d) REF. PART REQ’D NUMBER DESCRIPTION 0900431 BOOM SWIVEL ASSEMBLY, LEFT (COMPLETE) 0900432 BOOM SWIVEL ASSEMBLY, RIGHT (COMPLETE) 0300113 GREASE FITTING 0300626 SHEAVE, 8" DIA X 1-1/2" RIM 0400133 SCREW, 3/8"-16 X 3" HEX HD CAP 0400150 SCREW, 3/8"-16 X 2-1/2"...

  • Page 101: Rear Jack Hydraulics

    Section VI - PARTS (cont’d) REAR JACK HYDRAULICS REF. PART REQ’D NUMBER DESCRIPTION REF. 0300011 VALVE, 4 SPOOL 0300040 CONNECTOR, 8MJ-8MP 0300041 CONNECTOR, 8MJ-8MB 0300680 JACK CYLINDER 0301445 CONNECTOR, EXTENDED, 8MJ-8MBL 0301816 FITTING, 45° 0302032 NIPPLE, BLACK PIPE, 1/2" X 6" REF.

  • Page 102: Lightbar Assembly

    Section VI - PARTS (cont’d) LIGHTBAR ASSEMBLY REF. PART REQ’D NUMBER DESCRIPTION 124001246 925 LIGHT BAR KIT 0702376 PLATE, SPOTLIGHT MOUNTING 0702381 CROSS CHANNEL 0800768 LEFT SUPPORT TUBE 0800769 RIGHT SUPPORT TUBE 0300095 SPOTLIGHT W/GASKET 0300117 GROMMET, RUBBER 0300442 LIGHT, 3-BAR 0301359 LIGHT, WRECKER SPECIAL 0400027...

  • Page 103: Heavy Duty Truck Hitch

    Section VI - PARTS (cont’d) HEAVY DUTY TRUCK HITCH REF. PART REQ’D NUMBER DESCRIPTION 124001041 ASSEMBLY, HEAVY DUTY TRUCK HITCH 0301205 CHAIN ASSEMBLY (NOT ILLUSTRATED) 0900100 ASSEMBLY, ANCHOR BAR (INCLUDES ITEMS 2 THRU 8) 0300113 GREASE FITTING 0300335 SHACKLE 0400190 SCREW, 1/2"-13 X 6-1/2"...

  • Page 104: Light Kit

    Section VI - PARTS (cont’d) LIGHT KIT REF. PART REQ’D NUMBER DESCRIPTION 0303123 LIGHT, SEALED RED, STOP & TURN 0303177 LIGHT, SEALED AMBER, TURN 0303124 LIGHT, SEALED CLEAR, BACKUP 0303128 TAIL LIGHT GROMMET REF. PART REQ’D NUMBER DESCRIPTION 0303125 LIGHT, SEALED MARKER, RED 0303126 LIGHT, SEALED MARKER, AMBER 0303127...
  • Page 105 Section VI - PARTS (cont’d) LIGHT KIT REF. PART REQ’D NUMBER DESCRIPTION 0300076 LICENSE PLATE BRACKET 0300117 GROMMET, RUBBER 0300273 LICENSE PLATE ILLUMINATOR 0300512 BULB, LICENSE PLATE ILLUMINATOR 0400061 SCREW, 1/4"-20 X 3/4" PAN HD SLOTTED 0400366 NUT, 1/4"-20 HEX 0400452 LOCKWASHER, 1/4"...
  • Page 106 Section VI - PARTS (cont’d) LIGHT KIT REF. PART REQ’D NUMBER DESCRIPTION 0302544 DOME LIGHT, M390S (COMPLETE) VI-32...

  • Page 107: Glad Hand Assembly

    Section VI - PARTS (cont’d) GLAD HAND ASSEMBLY REF. PART REQ’D NUMBER DESCRIPTION 0301862 CATERPILLER GROMMET 0301909 RECEPTACLE BOOT 0301944 GLAD HAND COUPLING 0301945 GLAD HAND PLUG 0301946 CONNECTOR 0301947 ADAPTER, 1/4" NPTM X 3/8" SYN. HOSE 0301948 HD 7-WAY TRAILER CONNECTOR 0400062 SCREW, 1/4"-20 X 3/4"...

  • Page 108: Air Operated Free Spool Clutch

    Section VI - PARTS (cont’d) AIR OPERATED FREE SPOOL CLUTCH VI-34...
  • Page 109 Section VI - PARTS (cont’d) AIR OPERATED FREE SPOOL CLUTCH REF. PART REQ’D NUMBER DESCRIPTION 0300324 SOLENOID VALVE 0300602 TOGGLE SWITCH 0301454 SWITCH BOOT 0301574 ELBOW 0301575 0302055 AIR CYLINDER 0400041 SCREW, #10-32 X 3/8" PAN HD 0400131 SCREW, 3/8"-16 X 1-3/4" HEX HD CAP 0400367 NUT, 1/4"-20 LOCK 0400392...

  • Page 110: King Pin Assembly

    Section VI - PARTS (cont’d) KING PIN ASSEMBLY REF. PART REQ’D NUMBER DESCRIPTION 0400188 SCREW, 1/2"-13 X 2" HEX HD CAP 0400282 SCREW, 3/4"-10 X 2-3/4" HEX HD CAP 0400316 SCREW, 7/8"-9 X 8" HEX HD CAP 0400440 NUT, 3/4"-10 HEX JAM 0400491 LOCKWASHER, 1/2"...

  • Page 111: Convenience Group

    Section VI - PARTS (cont’d) CONVENIENCE GROUP REF. PART REQ’D NUMBER DESCRIPTION 0300097 FOLDING STEP, B2797 STAINLESS STEEL 0300188 STANCHION, AFT, WITH SETSCREW 0300496 STANCHION, CENTER, WITH SETSCREW 0400026 SCREW, #8-32 X 1/4" HDLESS ALLEN SET 0400043 SCREW, #10-24 X 1" OVAL HD PHILLIPS 0400101 SCREW, 5/16"-18 X 1"...

  • Page 112: Vernier Throttle

    Section VI - PARTS (cont’d) VERNIER THROTTLE CONTROL CABLE REF. PART REQ’D NUMBER DESCRIPTION 0300182 STOP COLLAR #516 (HD1255) 0300722 THROTTLE CONTROL CABLE, 30’ VI-38...
  • Page 113 Section VII - ELECTRICAL SCHEMATICS WRECKER BODY WIRING COLOR CODE MASTER RED - STOP YELLOW LEFT TURN (LEFT STOP & TURN BEYOND CONVE GREEN RIGHT TURN (RIGHT STOP & TURN BEYOND CONV BROWN MARKER/RUNNING WHITE GROUND BLACK BACK UP ORANGE HOT (TOOLBOX LIGHTS &...
  • Page 114 Section VII - ELECTRICAL SCHEMATICS JUNCTION BOX POLE ORIENTATION RIGHT TURN GREEN (RIGHT TURN & STOP BEYOND CONVERTER & RELAYS) BROWN ALL MARKER / RUNNING LIGHTS, LICENSE PLATE ILLUMINATOR, & 3 BAR LIGHTS LEFT TURN YELLOW (LEFT TURN & STOP BEYOND CONVERTER &...
  • Page 115 Section VII - ELECTRICAL SCHEMATICS WRECKER BODY LIGHTING RIGHT REAR WHITE BLACK SIDE MARKER (RED) BROWN WHITE BACKUP (WHITE) GREEN RIGHT FRONT WHITE RIGHT TURN MARKER (AMBER) (AMBER) BROWN STOP / RUNNING JUNCTION BOX #1 (RED) WHITE GREEN BROWN REAR MARKER BROWN @ MUDFLAP WHITE...
  • Page 116 Section VII - ELECTRICAL SCHEMATICS WHEEL LIFT REMOTE WHITE SOLENOID VALVE WHITE/BLACK GREEN/BLACK W/L DOWN W/L UP PINK ORANGE/BLACK TILT DOWN TILT UP BLUE/BLACK BLACK/WHITE EXTEND OUT EXTEND IN HAND HELD WHEEL LIFT REMOTE CONTROL JUNCTION WHITE BOX # 2 EXTEND OUT GREEN ALL WIRE # 14 GAGE...
  • Page 117 Section VII - ELECTRICAL SCHEMATICS TOWLIGHT PLUG WIRING DETAIL "A" JUNCTION BOX #1 JUNCTION BOX #2 TOWLIGHT PLUG ORIENTATION REAR VIEW (FEMALE) GREEN YELLOW BROWN RELAY YELLOW WHITE YELLOW WHITE FROM CHASSIS HARNESS SEE DETAIL "A" GREEN RELAY GREEN BROWN ALL WIRE #14 GAGE COLOR CODES FROM JUNCTION BOX TO MME CONVERTER AND RELAYS STOP...
  • Page 118 Section VII - ELECTRICAL SCHEMATICS STOP / TURN LIGHT AT PYLON JUNCTION BOX #1 JUNCTION BOX #2 BLACK BACKUP BACKUP RT TURN, STOP ALARM & RUNNING RELAY YELLOW WHITE FROM CHASSIS HARNESS RELAY GREEN GREEN LT TURN, STOP & RUNNING BROWN BACKUP COLOR CODES FROM JUNCTION BOX TO MME CONVERTER AND RELAYS...
  • Page 119 Section VII - ELECTRICAL SCHEMATICS RELAY SCHEMATIC RELAY #1 YELLOW FROM CHASSIS JUNCTION BOX #2 YELLOW RELAY #2 TO PYLON & TOWLIGHT PLUG ORANGE GREEN GREEN FROM CHASSIS TO PYLON & TOWLIGHT PLUG VII-7...
  • Page 120 Section VII - ELECTRICAL SCHEMATICS FREEWHEEL SCHEMATIC PURPLE/BLACK RT FREEWHEEL RT SOLENOID FREEWHEEL RIGHT CONTROL STATION PURPLE LT SOLENOID LT FREEWHEEL FREEWHEEL RT FREEWHEEL LEFT CONTROL STATION # 11 JUNCTION BOX # 2 LT FREEWHEEL VII-8...
  • Page 121 Section VII - ELECTRICAL SCHEMATICS TOOLBOX LIGHT SCHEMATIC ORANGE RIGHT FRONT LIMIT SWITCH GROUND ORANGE GROUND GROUND JUNCTION BOX # 2 LEFT FRONT LEFT REAR LIMIT SWITCH LIMIT SWITCH ORANGE VII-9...
  • Page 122 Section VII - ELECTRICAL SCHEMATICS WIRING PARTS LIST PART NUMBER DESCRIPTION REQ’D 0300134 CLAMP, 1" HOSE 0300188 CLAMP, 1-1/2" HOSE 0301601 CLAMP, 5/8" HOSE, INSULATED 0301671 TOW LIGHT SOCKET 0301800 JUNCTION BOX 0301909 RECEPTACLE BOOT 0302380 RELAY - SEALED & SKIRTED 0302558 HAND CONTROL ASSEMBLY 7203001...
  • Page 123 Section VII - HYDRAULIC SCHEMATICS STANDARD VII-11...
  • Page 124 Section VII - HYDRAULIC SCHEMATICS with OPTIONAL HAND HELD REMOTE VII-12...
  • Page 125 NOTES...
  • Page 126 CENTURY ® A Division of Miller Industries Towing Equipment Inc. 8503 Hilltop Drive • • • • Ooltewah, Tennessee 37363 • • • • (423) 238-4171 Mailing Address: P.O. Box 120 • • • • Ooltewah, Tennessee 37363 • • • • Telex: 856967 CENWKRTN UD...

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