Tennant 255 Series II Operator's Manual
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Tennant 255 Series II Operator's Manual

Tennant 255 Series II Operator's Manual

Sweeper/scrubber
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  • Page 1 255 Series II (Operator Manual) Sweeper/ Scrubber Home Find... Go To..
  • Page 2 This manual is furnished with each new TENNANTr (Model 255 Series II). It provides necessary operating and preventive maintenance instructions. Read this manual completely and understand the machine before operating or servicing it. This manual covers all machine variations and standard accessories. The tabbed instruction portion of the manual consists of the Specification, Operation, Maintenance, and Appendix sections.

  • Page 3: Ordering Repair Parts

    The section also has a illustration of the top and side view of the machine with the height and width dimensions displayed. 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 4: About This Manual

    You also serial number; such as (00000---002345). can order any of the individual parts listed under the parking brake if it is the only part you need. 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 5 These are the supplier breakdowns. The engine breakdown contains both supplier and TENNANT parts numbers for repair parts. Breakdowns for hydraulic and electrical components have TENNANT part numbers for the parts TENNANT supplies.
  • Page 6 ABOUT THIS MANUAL 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 7: General Information

    -- Use care when backing machine. -- Do not carry riders on machine. WARNING: Falling hopper. Engage hopper -- Always follow safety and traffic rules. support bar before working under hopper. 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 8 LPG hoses. WARNING: Battery acid causes severe burns. Avoid contact. Wash immediately and get medical attention if contact occurs. WARNING: Stay clear of hopper lift arms when they are in motion. 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 9 UNDERSIDE OF BUMPER, LOW DUMP MODEL ONLY. 02453 NOISE LABEL -- LOCATED ON FRONT RIGHT OF HEAVY BUMPER LABEL -- LOCATED ON OPERATOR COMPARTMENT. UNDERSIDE OF BUMPER, LOW DUMP MODEL ONLY. 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 10 OPERATOR COMPARTMENT. HOPPER LIFT ARMS, MULTI-LEVEL DUMP MODEL ONLY. 02453 FOR SAFETY LABEL -- LOCATED ON LEFT SIDE HOPPER SUPPORT BAR LABEL -- LOCATED ON OF OPERATOR COMPARTMENT. HOPPER SUPPORT BAR. 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 11: Table Of Contents

    ....2-10 TO OPERATE SNOW BLADE ..2-28 TO REMOVE SNOW BLADE ..2-29 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 12: General Information

    ....3-33 ELECTRICAL SCHEMATIC, ACCESSORIES ....3-34 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 13 Panels Group ....5-36 TO DRAIN THE RECOVERY TANK 3-56 TO CLEAN THE RECOVERY TANK 3-56 255 SERIES II MM189 (6--- 90) Home Find... Go To..
  • Page 14 Multi---Level Dump ..6-13 Tie---Down Kit ....7-45 255 SERIES II MM189 (6--- 90) viii Home Find... Go To..
  • Page 15 Breakdown 82757 ..8-19 Fig. 16 --- Hydraulic Cylinder Breakdown 04471 ..8-20 255 SERIES II MM189 (6--- 90) Home Find... Go To..
  • Page 16 GENERAL INFORMATION 255 SERIES II MM189 (6--- 90) Home Find... Go To..
  • Page 17 ....GENERAL MACHINE PERFORMANCE ..MACHINE DIMENSIONS ....255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 18 SPECIFICATIONS 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 19: Specifications

    0.26 cu in (5 cc) displacement per revolution, Main brush --- hydraulic drive motor 3000 psi (20,685 kPa) maximum rated Side brush --- hydraulic drive motor pressure Vacuum fan --- hydraulic drive motor 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 20: Suspension System

    --- 161 in (4090 mm) Minimum isle turn width, left, multi---level dump model --- 111 in (2820 mm) Maximum rated climb/descent angle --- 10_ with full hopper, 15_ with an empty hopper 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 21: Machine Dimensions

    96 in (2440 mm) Low Dump Model 98 in (2490 mm) Multi-Level Dump Model 56 in (1420 mm) Low Dump Model 59 in (1500 mm) Multi-Level Dump Model 52 in (1320 mm) 02452 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 22 SPECIFICATIONS 255 SERIES II MM189 (NIL) Home Find... Go To..

  • Page 23: Multi-Level Dump Model Shown

    ......2-15 TO DUMP HOPPER ....2-15 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 24 OPERATION 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 25: Preparation For Operation

    WARNING: Machine can have static electricity charge. When pouring fuel, spark can ignite fuel causing fire or explosion. Connect wire attached to fuel can to machine to discharge spark before pouring fuel. 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 26: Operation Of Controls

    Main Brush Access Door C. Steering Wheel J. Operator Seat D. Engine Cover K. Scrub Attachment E. Hopper Cover L. Front Access Door F. Hopper Door M. Solution Tank Covers G. Side Brush 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 27: Instrument Panel Symbols

    Main Brush On Hopper Roll Out Filter Shaker Hopper Roll In/Out Hold Filter Clogged Hopper Roll In Key Switch Side Brush On Side Brush Down Hopper Up Side Brush Up 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 28 OPERATION INSTRUMENT PANEL SYMBOLS (cont.) Circuit Breaker 1 Circuit Breaker 2 Circuit Breaker 3 Circuit Breaker 4 Circuit Breaker 5 Circuit Breaker 6 Circuit Breaker 7 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 29: Controls And Instruments

    Y. Hopper Support Bar L. Hopper Dump Lever Z. Scrub Brush Position Lever M. Hopper Lift and Side Brush Lever AA.Solution Flow Knob N. Main Brush Position Lever BB.Throttle Switch O. Steering Wheel 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 30: Brake Pedal

    The operator seat also tilts forward to allow access to the fuel tank. 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 31: Throttle Switch

    To the start the side brush rotation, push the lever into the (Side Brush On) position. To stop the side brush rotation, pull the lever into the (Hopper Down) position. 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 32: Main Brush Position Lever

    (Main Brush On) position. To stop the main brush rotation and shut off the vacuum fan, return the switch to the middle position. 2-10 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 33: Engine Coolant Temperature Gauge

    NOTE: Do not operate the starter motor for more than 10 seconds at a time or after the engine has started. Allow the starter to cool between starting attempts. The starter may be damaged if it is operated 2-11 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 34: To Disengage Hopper Support Bar

    4. Slowly lower the hopper so the lift arm pin or cam rests on the support bar. 5. Turn the engine off. 5. Turn the engine off. 6. Check the support bar to make sure it is securely engaged. 2-12 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 35: Scrub Brush Position Lever

    To increase solution flow, pull the knob out. To decrease solution flow, push the knob in. Pushing the knob all of the way in will stop solution flow. 2-13 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 36: Machine Operation

    Check brakes and controls for proper operation. 8. Place the throttle control in to the (Fast 1) Check service records to determine service position, and drive the machine to the area to requirements. be swept. 2-14 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 37: To Sweep

    (Hopper Roll In) main brush, vacuum fan and filter shaker position to return the hopper to its normal switch in the (Main Brush On) position. angle, then release the lever. 2-15 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 38: Normal Scrubbing Operation

    Check brakes and controls for proper operation. Check for LPG odor indicating a fuel leak. Check service records to determine service Check under machine for leak spots. requirements. 2-16 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 39: To Start Machine

    FOR SAFETY: Before leaving or servicing the and drive the machine to the solution filling site. machine; stop on level surface, set parking brake, and turn off machine. 2. Open the solution tank covers. 2-17 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 40: To Drain Recovery Tank And Empty Debris Hopper

    Check squeegees for proper deflection. engine and set the parking brake. FOR SAFETY: Before leaving or servicing the machine; stop on level surface, set parking brake, and turn off machine. 2-18 255 SERIES II MM189 (NIL) Home Find... Go To..

  • Page 41: To Stop Machine

    Check for LPG odor indicating a fuel leak. 5. Low dump models: Unlatch the vacuum door retainer. Press the vacuum door arms down to Check under machine for leak spots. close the vacuum door. 2-19 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 42 Multi-level dump models: Pull the vacuum door 6. Low dump models: Remove the vacuum plug open. The spring will keep the door open. from the side of the hopper. 17. Close the hopper inspection door. 2-20 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 43: Hopper Dolly

    (Hopper Down) position to lower the hopper onto the dolly. 11. Push the lift arms down to clear the lift arm pins and roll the hopper away from the machine. 2-21 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 44: To Install Hopper With Dolly

    9. Connect the wire harness connectors and the vacuum hose(s) between the hopper and the machine. 02756 LOCKING BRACKET 10. Reposition and latch the hopper cover on the hopper. A. Locking Bracket 2-22 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 45 13. Connect the wire harness connectors and vacuum hoses between the scrub attachment A. Top Cam and the machine. B. Lift Arm C. Bracket 8. Start the engine, raise the scrub attachment, 2-23 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 46 C. Pin Keeper A. Quick-Disconnect Fitting D. Squeegee Assembly 15. Connect the large diameter hose from the scrub attachment to the quick-disconnect station port the previous hose was connected 2-24 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 47: To Remove Scrub Attachment

    The hole 4. Pull the retaining pin keeper out and remove should be free of debris or obstructions. the two squeegee assembly retaining pins. Release the pin keeper. 2-25 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 48 80 + 5 psi (550 + 35 kPa) for sweeping. A. Operator-Side Port B. Hydraulic Hose 9. Disconnect the wire harness connectors and vacuum hoses between the scrub attachment and the machine. 2-26 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 49: Snow Blade

    C. Mounting Frame D. Limiting Chain 02761 SNOW BLADE INSTALLATION A. Snow Blade B. Runner Spindle C. Quadrant Assembly D. King Pin E. Sector Pin F. Mounting Frame G. Limiting Chain 2-27 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 50: To Operate Snow Blade

    The blade assembly is mounted on the lift arms of the machine which are free to float upward if necessary. 2-28 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 51: To Remove Snow Blade

    7. Push the lift arms down to clear the lift arm C. Mounting Frame pins. D. Limiting Chain 8. Start the engine, release the parking brake, and back the machine away from the snow blade assembly. 2-29 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 52 8. Connect the snow broom frame to either the right or left side of the mounting frame with a clevis pin depending upon which direction the snow should be swept. 2-30 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 53: To Operate Snow Broom

    This can seriously damage the bolts. Recheck and adjust as necessary. hydraulic system. 02760 MOUNTING FRAME UPPER END A. Upper End Bolt B. Mounting Frame 2-31 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 54: To Remove Snow Broom Assembly

    9. Push the lift arms down to clear the lift arm pins. 10. Start the engine, release the parking brake, 02755 RECONNECTED HOSE and back the machine away from the snow broom assembly. A. Operator-Side Port B. Hydraulic Hose 2-32 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 55: Machine Troubleshooting

    Adjust hopper floor clearance Hopper full Empty hopper Hopper floor skirts worn, damaged Replace skirts NOTE: For more specific electro-hydraulic system troubleshooting information, see HYDRAULIC SYSTEM TROUBLESHOOTING in the MAINTENANCE section. 2-33 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 56: Machine Troubleshooting -- Scrubbing

    TROUBLESHOOTING: Main brush turns slowly or not at all Debris hopper full Empty hopper NOTE: For more specific electro-hydraulic system troubleshooting information, see HYDRAULIC SYSTEM TROUBLESHOOTING in the MAINTENANCE section. 2-34 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 57: Transporting Machine

    Jack up the machine only at the designated locations. WARNING: Machine is unstable on jack. Jack machine up at designated locations only. Block machine up with jack stands. 2-35 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 58: Machine Tie-Downs

    9. When finished servicing the machine, raise the machine off the jack stands. 10. Remove the jack stands from under the machine. 11. Lower the machine. 12. Remove the blocks from the tires. 2-36 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 59: Machine Storage

    4. Replace the high tension coil wire and spark plugs. 5. Drain the gasoline from the carburetor. 2-37 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 60 OPERATION 2-38 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 61: Recommended First 50-Hour Machine Inspection

    ....3-39 OIL PRESSURE SWITCH ... . . 3-25 255 SERIES II MM189 (6--- 90) Home Find... Go To..
  • Page 62 ......3-63 TO REPLACE SNOW BROOM ..3-63 255 SERIES II MM189 (6--- 90) Home Find... Go To..
  • Page 63 4. Torque the rear wheel nuts. 5. After the first 150 hours of operation, check and adjust the engine valve tappet clearance. 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 64: Maintenance Chart

    100 Hours Hopper dust filter Inspect, clean or replace Radiator Check coolant level Hydraulic fluid reservoir Check fluid level HYDO Rear tire Check pressure Dust seals Check for damage or wear 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 65: Engine

    Hydraulic reservoir Replace suction strainer EO --- Engine oil HYDO --- Tennant Company or approved hydraulic fluid MPG --- Multi-purpose, calcium soap base grease MPGM --- Multi-purpose, water resistant, lithium base, moly-disulphide EP grease MPGP --- Multi-purpose grease, paraffin base with organic thickener.
  • Page 66 200 hours of operation. Use a multipurpose, water resistant, paraffin base grease with organic thickener. 02457 FRONT WHEEL A. Wheel 02456 REAR WHEEL SUPPORT A. Rear Wheel Support B. Grease Fitting 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 67: Hopper Door Latches

    00550 HOPPER DOOR LATCH A. Hopper Door Latch B. Grease Fitting 02478 LEFT SIDE HOPPER LIFT BEARING A. Left Side Access Door B. Grease Fitting C. Lift Bearing 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 68: Scrub Attachment Leg Casters

    EP grease, or a paraffin base grease with organic thickener. organic thickener. 02754 02764 LEG CASTER DEBRIS HOPPER A. Leg A. Hopper B. Grease Fitting B. Scrub Attachment Frame C. Grease Fitting 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 69: Hydraulics

    The quality and condition of the hydraulic fluid play a very important role in how well the machine operates. Tennant HYDRAULIC FLUID RESERVOIR Company has developed its own hydraulic fluid to Hydraulic fluid is stored in the hydraulic fluid meet the special needs of its machines.

  • Page 70: To Drain Hydraulic Fluid Reservoir And Replace Filter Element

    6. Operate the machine and check for leaks. Correct any leaks found. 7. Check the hydraulic fluid reservoir level and fill as required. 3-10 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 71: To Fill Hydraulic Fluid Reservoir

    TO ADJUST DIRECTIONAL PEDAL, whenever the machine creeps or after replacing the hydraulic propelling pump or pump linkages. The pedal linkages should also be adjusted whenever the reverse speed seems excessive or inadequate. 3-11 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 72: To Adjust Directional Pedal

    10. Tighten the linkage ball joints and jam nuts. D. Jam Nut 11. Raise the rear of the machine, remove the jack 5. Start the engine. stands, and lower the machine. 3-12 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 73: Lift Arm Speed Limiter

    A. Speed Limiter Bearing infection or death can result. Do not use body to B. Retaining Nut locate leak. Use cardboard to locate leak. C. Pump Linkage D. Lift Arm Cam 3-13 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 74: Hydraulic Schematic, Low Dump Model

    MAINTENANCE 04624 HYDRAULIC SCHEMATIC, LOW DUMP MODEL 3-14 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 75: Hydraulic Schematic, Multi-Level Dump Model

    MAINTENANCE 04625 HYDRAULIC SCHEMATIC, MULTI-LEVEL DUMP MODEL 3-15 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 76: Troubleshooting

    Hydraulic motor failure See HYDRAULIC COMPONENTS TROUBLESHOOTING: Hydraulic motor failure Relief valve in Clean or replace relief valve sticking valve Gear pump failure See HYDRAULIC COMPONENTS TROUBLESHOOTING: Hydraulic gear pump 3-16 255 SERIES II MM189 (12--- 89) Home Find... Go To..
  • Page 77 Dump cylinder failure See HYDRAULIC COMPONENTS TROUBLESHOOTING: Hydraulic cylinder failure Gear pump failure See HYDRAULIC COMPONENTS TROUBLESHOOTING: Hydraulic gear pump Lift arms binding Replace and/or adjust lift arm linkage 3-17 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 78: Hydraulic Components Troubleshooting

    Clean or replace relief valve Integral charge pump failure Replace charge pump Rotating group worn Replace rotating group Shaft failure Replace shaft Backplate worn Replace backplate Engine-to-pump coupling Replace coupling failure 3-18 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 79: Engine

    Flush the radiator first, then the engine, to allow the engine to cool as much as possible. 3-19 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 80: Air Intake System

    Do not remove the air filter element unless it loads with dirt. is restricting air flow. 3-20 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 81: To Replace Air Filter Element

    A. Filter Housing B. Clamp Ring C. Filter Element D. Safety Air Filter Element (Accessory) E. Dust Cap F. Wing Nut 3-21 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 82: Fuel Filter

    Tighten the clamp ring to hold it in place. Check all intake hose connections for leaks or abrasion. 02492 DUST CAP A. Dust Cap 13. Reset the air filter restriction indicator. 14. Close the access doors. 3-22 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 83: Carburetor

    Check routings of all LPG hoses. Keep them away from sharp edges, exhaust manifolds, or other hot surfaces. Check for signs of abrasion or deterioration. Replace hoses found to be worn or damaged. 3-23 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 84: Fuel Tanks

    TYPICAL LPG LIQUID WITHDRAWAL FUEL TANK appropriate personnel for action. A. Filler Valve B. Safety Relief Valve C. Liquid Service Valve D. Service Valve Coupling E. Liquid Level Gauge 3-24 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 85: To Change An Lpg Fuel Tank

    12. Connect the LPG fuel line to the tank service coupling. Make sure the service coupling is clean and free of damage. Also make sure it matches the machine service coupling. 3-25 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 86: Vaporizer-Regulator

    Kinked or restricted fuel line Straighten or replace fuel line Engine out of tune Tune-up engine Restricted air filter Clean or replace air filter element Vaporizer-regulator maladjusted Adjust vaporizer-regulator 3-26 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 87: Governor (For Machines Below Serial Number 038000)

    038000) throttle. 1. Operate the engine until it reaches normal The electronic governor is factory set and is not user operating temperature. serviceable. 3-27 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 88: Ignition System

    3. Tighten the spark plugs to 22 to 28 ft lb machine; stop on level surface, set parking brake, (30 to 38 Nm) with a socket wrench of the and turn off machine. correct size. 3-28 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 89: Distributor (For Machines Below Serial Number 038000)

    Stop 110 Nm). the engine. Tighten the intake manifold bolts to 15 to 18 ft lb (20 to 24 Nm) after every 800 hours of operation. 3-29 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 90: Valve Tappet Clearance

    Check and adjust, for machines serial number 038000 and above, the intake valve clearance from 0.009 in (0.22 mm), and the exhaust valve clearance from 0.013 in (0.32 mm) while the engine is cold. 3-30 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 91: Electrical System

    (4 points) for each 10_ F (6_ C) below 80_ F clear petroleum jelly to the terminals and the cable (27_ C). connectors. Keep the top of the battery clean and dry. 3-31 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 92: Electrical Schematic (For Machines Below Serial Number 038000)

    MAINTENANCE 04642 ELECTRICAL SCHEMATIC (for machines below serial number 038000) 3-32 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 93: (For Machines Serial Number 038000 And Above)

    MAINTENANCE ELECTRICAL SCHEMATIC (for machines serial number 038000 and above) 3-33 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 94: Series Ii Mm189 (12

    MAINTENANCE 04642 ELECTRICAL SCHEMATIC, ACCESSORIES 3-34 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 95: Electrical Schematic, Auto Shaker, Rfs

    MAINTENANCE 06187 ELECTRICAL SCHEMATIC, AUTO SHAKER, RFS 3-35 255 SERIES II MM189 (6--- 90) Home Find... Go To..
  • Page 96 MAINTENANCE 06187 ELECTRICAL SCHEMATIC, AUTO SHAKER, RFS 3-36 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 97: Belts And Chains

    8 to 10 lb (4 to 5 kg) applied at belt midpoint of the longest span. 04626 GOVERNOR BELT A. Governor B. Belt C. Idler D. Idler Bolts 3-37 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 98: Debris Hopper

    B. Dust Filter C. Frame Nut D. Shaker Frame 5. Lift the dust filter element out of the dust filter frame. 6. Clean or discard the dust filter as required. 3-38 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 99: To Install Hopper Dust Filter

    C. Check and adjust the cams on the lift arms so the hopper brackets rest on the cams. 02479 HOPPER CAM A. Cam B. Hopper Bracket 3-39 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 100: To Adjust Multi-Level Dump Model Hopper

    The cams must rest on the sloping edge of the lintel. C. Tighten the clevis jam nut against the clevis. 3-40 255 SERIES II MM189 (6--- 90) Home Find... Go To..
  • Page 101 F. Tighten the clevis jam nuts. G. Secure the clevis pins in place with their 02451 HEXAGON HOPPER CAM retaining rings. A. Hexagon Hopper Cam B. Hopper Lift Arm 3-41 255 SERIES II MM189 (6--- 90) Home Find... Go To..
  • Page 102 F. Start the engine. G. Dump the hopper and observe the unlatching of the hopper door. The latches should release at the same time. Adjust the latch chain eyebolts if necessary. 3-42 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 103: Thermo Sentryt

    E. Tighten the jam nut against the clevis. F. Raise the hopper, disengage the hopper bar and lower the hopper. G. Check the position of the stabilizer leg. Readjust as required. 3-43 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 104: Brushes

    2. Place the main brush position lever in the (Main forces the brush idler arm loose. Remove the brush Brush Down) position. idler arm retaining bolt and reinstall the plastic screw. 3-44 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 105: Main Brush Pattern

    13. Check and adjust the main brush pattern as NORMAL MAIN BRUSH PATTERN described in TO CHECK AND ADJUST MAIN BRUSH PATTERN. A. Main Brush Pattern B. Pattern Width 3-45 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 106: Side Brush

    02485 LOW DUMP MODEL SIDE BRUSH A. Nut B. Side Brush Arm C. Side Brush 00563 MAIN BRUSH HEIGHT ADJUSTMENT KNOB A. Height Adjustment Knob B. Wing Nut 3-46 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 107: To Replace Side Brush

    11. Disengage the hopper support bar and lower machine; stop on level surface, set parking brake, the hopper. and turn off machine. 4. Place the side brush position lever in the (Side Brush Up) position. 3-47 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 108: Skirts And Seals

    5. Remove the hopper lip retaining strip mounting bolts. 00604 HOPPER LIP SKIRTS A. Hopper Lip Side Skirt B. Retaining Strip C. Hopper Lip Skirts 3-48 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 109: To Replace And Adjust Brush Door Skirts

    0.25 in (5 mm). 5. Remove the skirt mounting bracket and the 9. Tighten the skirt retaining bolts. brush contact skirt. 10. Close the brush doors. 3-49 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 110: Main Brush Door Seals

    100 hours of operation. 00570 BRUSH ACCESS DOOR SEALS A. Brush Access Door B. Door Seals 02480 HOPPER INSPECTION DOOR SEAL A. Hopper Inspection Door B. Door Seal 3-50 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 111: Hopper Door Seals

    To adjust seal contact, loosen the vacuum fan intake bracket mounting bolts. Pivot the bracket into the correct position and retighten the bolts. 02482 HOPPER COVER SEAL A. Hopper Cover B. Cover Seal 3-51 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 112: Brakes And Tires

    70 + 5 psi (480 + 35 kPa). A. Brake Adjusting Clevis A solid rear tire is available as an accessory. B. Threaded Rod C. Brake Cross Shaft 3-52 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 113: Scrub Attachment

    They should be 2 to 3 in (50 to 75 mm) wide. The scrub brush pattern is adjusted by changing the position of the clevis on the threaded stud of the lift linkage. See TO CHECK AND ADJUST SCRUB BRUSH PATTERN. 3-53 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 114: To Replace Scrub Brush

    Brush On) position, move the scrub attachment over the test area. Set the parking brake. 3. Place the main brush, vacuum fan and filter shaker switch in the bottom (Main Brush On) position. 3-54 255 SERIES II MM189 (6--- 90) Home Find... Go To..
  • Page 115 02771 CROSS SHAFT SHIM A. Shim B. Bearing Block C. Cross Shaft 02747 LIFT LINKAGE A. Clevis B. Stud 3-55 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 116: Recovery Tank

    02748 DRAIN HOSE A. Retention Plug B. Drain Hose 3-56 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 117: Debris Hopper

    The debris will empty as the unit is lifted and tilted back. 02764 DEBRIS HOPPER LIMIT BOLTS A. Lower Limit Bolt B. Upper Limit Bolt C. Debris Hopper 3-57 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 118: Side Squeegee

    3. Pull the pin keeper out and remove the two squeegee assembly retaining pins. Release the 12. Connect the squeegee assembly chain to the pin keeper. chain hook. 4. Slide the squeegee assembly out of the machine. 3-58 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 119: Rear Squeegee

    10. Adjust the rear squeegee as described in TO CHECK AND ADJUST REAR SQUEEGEE. 02773 REMOVING RETAINING PINS A. Retaining Pin B. End Bracket C. Squeegee Blade D. Band 3-59 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 120: To Replace Or Rotate Front Blade

    Secure with the nuts removed earlier. 02773 REMOVING RETAINING PINS 16. Reconnect the squeegee suction hose to the squeegee frame. A. Retaining Pin B. End Bracket C. Squeegee Blade 3-60 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 121: To Check And Adjust Rear Squeegee

    C. Cross Bar loose when the squeegee actuator is in the extended “lower” position. The squeegee should clear the floor when the lever is in the retracted “lift” position. 3-61 255 SERIES II MM189 (6--- 90) Home Find... Go To..
  • Page 122 10. Adjust the squeegee guards on each side of the machine so they clear the floor by 1.5 in (40 mm). 04629 SQUEEGEE GUARD A. Guard B. Squeegee 3-62 255 SERIES II MM189 (6--- 90) Home Find... Go To..

  • Page 123: Snow Broom

    2. Remove the bolt holding the idler arm to the cross shaft. 02763 IDLER ARM A. Cross Shaft B. Bolt C. Idler Arm 3-63 255 SERIES II MM189 (6--- 90) Home Find... Go To..
  • Page 124 MAINTENANCE 3-64 255 SERIES II MM189 (6--- 90) Home Find... Go To..
  • Page 125 ....HYDRAULIC O---RING FITTING TORQUE CHART ....255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 126: Appendix

    APPENDIX 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 127: Hardware Information

    133 (180) 144 (195) 196 (265) Locktite 271 red --- high strength thread locking 260 (352) 336 (455) compound. TENNANTr Part No. 19857, 0.5 ml 470 (637) 664 (900) tube. 255 SERIES II MM189 (12--- 89) Home Find... Go To..

  • Page 128: Hydraulic Fitting Information

    0.75--- 16 30 ft lb (41 Nm) 0.62 0.88--- 14 40 ft lb (54 Nm) 0.75 1.12--- 12 70 ft lb (95 Nm) 1.31--- 12 90 ft lb (122 Nm) 255 SERIES II MM189 (12--- 89) Home Find... Go To..

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