ASV SC50 Scout Service & Repair Manual
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ASV SC50 Scout Service & Repair Manual

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This manual is complements of
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Track Loader Parts
English
All
SN All
SC50 Scout
Service Repair Manual
6543 Chupp Road
https://tractormanualz.com/
Atlanta, Georgia 30058
USA
(800)616-8156
8/17/2016

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Summary of Contents for ASV SC50 Scout

  • Page 1 8/17/2016 Language: English Geographic Region: Serial Number Range: SN All SC50 Scout Service Repair Manual This manual is complements of TrackLoaderParts.com The world's best source for ASV parts. Track Loader Parts 6543 Chupp Road https://tractormanualz.com/ Atlanta, Georgia 30058 (800)616-8156...

  • Page 2: Table Of Contents

    Table of Contents 1. Product Safety 4. Maintenance Chapter Overview ..... 1-1 Chapter Overview ..... 4-1 Safety Messages .
  • Page 3 Rubber Track Utility Vehicle Table of Contents 7. Chassis and Fuel Tank 12. Undercarriage Chapter Overview ..... 7-1 Chapter Overview ..... 12-1 Personal Safety .

  • Page 4: Product Safety

    If you use a tool, proce- Attention! Your Safety Is Involved! dure, work method or operating technique that is not specifically recommended by ASV, you must The information that follows each heading describes satisfy yourself that it is safe for you and others.

  • Page 5: Protective Equipment

    Rubber Track Utility Vehicle 1. Product Safety Protective Equipment Batteries Always wear appropriate protective equipment for Do not smoke when inspecting the battery electrolyte working conditions when working on or around a level. Never disconnect any charging unit circuit or bat- Rubber Track Utility Vehicle.

  • Page 6: Repair

    ASV jack stands work well to support the machine while performing 13. Relieve hydraulic system pressure by relaxing all maintenance or repair work.

  • Page 7: Asbestos Information

    When replacement parts are required for your machine, jects. use only genuine ASV replacement parts or parts that meet or exceed original specifications including, but not Stay clear of the cutting edges, pinching surfaces or...

  • Page 8: Machine Label And Decal Examples

    Rubber Track Utility Vehicle 1. Product Safety Machine Label and Decal Examples Examples of the labels and decals displayed on the machine are shown on this page. W A R N I N G 2051-678 Prior to Operating Pre-Start Checklist Vehicle Capacity Always Read and fully under-...
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  • Page 10: Technical Specifications

    Listed below are common service tools which are iden- Model: Husco AR1652 tified and utilized in the service procedures described in this manual. Use tools recommended by ASV when- Motion Control (forward/reverse) ever possible to reduce risk of injury and or machine Model: Rexroth 2TH6RP06 damage during service.
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  • Page 12: Circuit Diagrams

    3. Circuit Diagrams Chapter Overview Hydraulic Charge Circuit This chapter contains diagrams for the following SC-50 circuits and sub components: hydraulic charge circuit, hydraulic auxiliary circuit, hydraulic drive circuit, steer- ing control valve, auxiliary control block, brake/2-speed control block, pilot generation (solenoid) block, shuttle block, and directional control valve.

  • Page 13: Hydraulic Auxiliary Circuit

    Rubber Track Utility Vehicle 3. Circuit Diagrams Hydraulic Auxiliary Circuit Figure 3-2 SC-50 Hydraulic Auxiliary Circuit TWO SPEED/BRAKE MANIFOLD AUXILIARY MANIFOLD AUXILIARY/CHARGE PUMP CHARGE/AUX PUMP INLET TANK FLOW TO FILTER THEN TANK TANK FLOW CHECK VALVE 80 PSI OIL COOLER https://tractormanualz.com/...

  • Page 14: Hydraulic Drive Circuit

    Rubber Track Utility Vehicle 3. Circuit Diagrams Hydraulic Drive Circuit Figure 3-3 SC-50 Hydraulic Drive Circuit DRIVE MOTOR 2-SPEED SHIFT DRIVE PRESSURE RELIEF VALVES (4) BRAKE 5500 PSI DRIVE PUMP DRIVE MOTOR CASE DRAIN https://tractormanualz.com/...

  • Page 15: Steering Control Valve

    Rubber Track Utility Vehicle 3. Circuit Diagrams Steering Control Valve Figure 3-4 SC-50 Steering Control Valve https://tractormanualz.com/...

  • Page 16: Auxiliary Control Block

    Rubber Track Utility Vehicle 3. Circuit Diagrams Auxiliary Control Block Figure 3-5 SC-50 Auxiliary Control Block https://tractormanualz.com/...

  • Page 17: Brake/2-Speed Control Block

    Rubber Track Utility Vehicle 3. Circuit Diagrams Brake/2-Speed Control Block Figure 3-6 SC-50 Brake/2-Speed Control Block https://tractormanualz.com/...

  • Page 18: Pilot Generation Block

    Rubber Track Utility Vehicle 3. Circuit Diagrams Pilot Generation Block Figure 3-7 SC-50 Pilot Generation Block https://tractormanualz.com/...

  • Page 19: Shuttle Block

    Rubber Track Utility Vehicle 3. Circuit Diagrams Shuttle Block Figure 3-8 SC-50 Shuttle Block https://tractormanualz.com/...

  • Page 20: Directional Control Valve

    Rubber Track Utility Vehicle 3. Circuit Diagrams Directional Control Valve Figure 3-9 SC-50 Directional Control Valve https://tractormanualz.com/...
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  • Page 22: Maintenance

    4. Maintenance Chapter Overview Dump Box Brace (if equipped) This chapter provides information on general mainte- The dump box brace (A) is intended to keep service nance procedures for the SC-50. If there is an issue personnel safe when it is necessary to work on a that requires troubleshooting, refer to Chapter 15, machine with the dump box in the raised position.

  • Page 23: Jacking Procedure

    3. Once in place, jack the machine upwards making sure it remains stable until it has reached sufficient height to install an ASV jack stand beneath the machine. 4. Slide the jack stand into place making sure it is cen- tered under the machine (left to right when viewed Engine &...
  • Page 24 Rubber Track Utility Vehicle 4. Maintenance Maintenance Schedule Maintenance Service Service Interval Notes Item required Capacity Grease fittings Lubricate Daily (Torsion Axle Pivots) Adjust levels as Fluid levels Check Daily necessary. Adjust tension as Fan belt tension Check Daily necessary. Fan belt Replace if worn or Inspect...

  • Page 25: Air Cleaner

    Do not clean the air filter elements while the engine warranty solution to further clean the element. Never soak for is in effect. During the warranty period, ASV recommends replacing the elements instead of cleaning them. Heavy- duty more than 24 hours.
  • Page 26 Rubber Track Utility Vehicle 4. Maintenance 4-12 4-10 Fuse Panel The electrical system in the Scout is equipped with Fuel Filter fuses that protect the electrical components from dam- The fuel filter removes contaminants from the fuel as it age. They can be found in the fuse panel located enters the engine for combustion.

  • Page 27: Engine Oil/Filter Change

    If and filter changed more frequently. ASV recommends the light does go out as expected, oil pressure has an interval of 250 hours or six months for machines been achieved.

  • Page 28: Engine Oil Specifications

    Rubber Track Utility Vehicle 4. Maintenance 4-18 Engine Oil Specifications ASV recommends using Posi-Lube 10W-30 Heavy Duty Engine Oil for most conditions. In the event of an Full alternate working environment, the chart above may be used as a guide to oil viscosity grades.

  • Page 29: Hydraulic Fluid/Filter Change

    Use extreme caution when changing the hydraulic oil. Introducing dirt or debris could be detrimental to the hydraulic system. ASV recommends service intervals of 500 hours for hydraulic fluid and 250 hours for hydraulic filter. To change the hydraulic fluid: 1.
  • Page 30 The undercarriage assemblies typically operate in harsh working conditions. They may work in mud, gravel, debris and various other abrasive materials during operation. ASV recommends a daily inspection of the undercarriage assemblies and cleaning if neces- sary. Materials that are particularly sticky or abrasive like...
  • Page 31 To remove tracks: 1. Raise the machine off of the ground and mechani- cally support it on ASV jack stands at a height that allows just enough clearance for track removal. The recommended distance is 3-4” from the bottom of 4-29 the track to the ground.
  • Page 32 Rubber Track Utility Vehicle 4. Maintenance 5. Loosen the bleeder bolt once again and move the front 14” wheels and axle as far rearward as possi ble. It may be necessary to assist in sliding the wheels rearward by stepping down on the inside of the track as shown (fig.
  • Page 33 Rubber Track Utility Vehicle 4. Maintenance To install tracks: 1. Wrap the track around the sprocket at the rear of the undercarriage (fig. 4-39). 2. Lubricate the inner front 14” wheel and the inside of the track at the front to aid in sliding the track back onto the undercarriage (fig.
  • Page 34 Rubber Track Utility Vehicle 4. Maintenance 4. Clean and reinstall (repack with grease if necessary) the outer bearing into the 14” wheel (fig. 4-44). 5. Reinstall the washer and lock nut and tighten to secure the 14” wheel in place. Do not install the grease cover or snap ring yet (fig.
  • Page 35 35% worn 4-53 Drive Sprocket Rollers 6. Repeat this procedure as required throughout the ASV undercarriages utilize rollers on the drive sprock- sprocket. ets to drive the track. These rollers help minimize fric- 7. Reinstall the track. (pg. 4-12) tion between the track and the drive sprocket to pro- long track life.

  • Page 36: Machine Controls And Instrumentation

    5. Machine Controls and Instrumentation Chapter Overview Instrumentation This chapter contains an overview of the machine con- The Instruments (Figure 5-2, 5-3) are positioned in the trols and instrumentation. For further information dash panel for good visibility when seated inside the regarding machine controls, instrumentation or opera- operator enclosure.

  • Page 37: Switches

    Rubber Track Utility Vehicle 5. Machine Controls and Instrumentation Switches The various switches (Figure 5-4) are positioned to provide good access and visibility. The switches are listed below. Switch Panels 1. Headlight Activation Switch 2. Beacon Activation Switch* 3. Heater Fan Activation Switch* 4.

  • Page 38: Operator Enclosure

    6. Operator Enclosure Chapter Overview Removal and Installation This chapter provides information on the assembly and Removal and installation procedures are provided for disassembly of the operator enclosure assembly. If the following operator enclosure components. there is an issue that requires troubleshooting, refer to •...

  • Page 39: Seat Switch

    Rubber Track Utility Vehicle 6. Operator Enclosure Seat Switch Removal 3. Remove the 4 nuts securing the seat to the mount- ing panel. (fig. 6-2) 1. Disconnect the seat switch harness from the switch, then twist the switch assembly counter- clockwise as shown to remove it from the under- side of the seat.

  • Page 40: Front Fascia

    Rubber Track Utility Vehicle 6. Operator Enclosure Gauges & Hour Meter Removal Required Tools fascia Socket/Combination Wrenches 2. Reach through from the front of the machine and squeeze the top and bottom of each switch as close to the dash as possible to release the clips that secure them, then push them through dash slightly as shown.

  • Page 41: Engine Cover

    Rubber Track Utility Vehicle 6. Operator Enclosure Engine Cover Removal 6-15 4. Lift and remove the engine cover from the 6-12 machine. (fig. 6-15) 1. Disconnect the rubber straps securing the cover to Installation the chassis. (fig. 6-12) 1. To reinstall the engine cover, reverse the removal procedure.
  • Page 42 Rubber Track Utility Vehicle 6. Operator Enclosure 6-17 6-20 3. Loosen the bolt securing the steering components to the steering shaft as shown. (fig. 6-17) 6-21 6-18 4. Gently tap the end of the bolt until the lower retain- ing plate comes loose and slides down on the bolt. (fig.

  • Page 43: Dash Panel

    Rubber Track Utility Vehicle 6. Operator Enclosure 7. Once the internal steering components have been Dash Panel removed, remove the dash panel according to the Removal procedure on this page. Required Tools Combination Wrenches Blade/Phillips Type Screwdriver Hex (Allen) Wrenches 6-23 6-26 1.
  • Page 44 Rubber Track Utility Vehicle 6. Operator Enclosure Installation 1. To reinstall the dash panel, reverse the removal lift off procedure. remove nut 6-29 3. If your machine is equipped with a heater, lift the heater control knob from the cable mechanism, then remove the retaining nut that secures the cable mechanism to the dash.
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  • Page 46: Chassis And Fuel Tank

    7. Chassis and Fuel Tank Chapter Overview Removal and Installation This chapter provides information on the assembly and Removal and installation procedures are provided for disassembly of the chassis. If there is an issue that the following chassis components. requires troubleshooting, refer to Chapter 15, •...
  • Page 47 Rubber Track Utility Vehicle 7. Chassis and Fuel Tank 6. Disconnect the battery cables from the battery. 3. Loosen and remove the retaining bolt and nut along with the internal components of the throttle 7. Once the battery has been disconnected, remove assembly.

  • Page 48: Cargo Bed

    Rubber Track Utility Vehicle 7. Chassis and Fuel Tank Cargo Bed Removal Required Tools Combination/Socket Wrenches 9. Now that the starter has been removed, there is clearance to remove the throttle pivot. Slide it out towards the engine and remove. (fig. 7-8) 7-10 Installation 1.

  • Page 49: Fuel Sending Unit

    Rubber Track Utility Vehicle 7. Chassis and Fuel Tank Fuel Sending Unit Removal Required Tools Combination/Socket Wrenches Screwdrivers (Blade and Phillips) 1. Remove the cargo bed as described on page 7-3 to access the fuel tank and sending unit. 7-16 5.

  • Page 50: R.o.p.s. Roll Cage

    Rubber Track Utility Vehicle 7. Chassis and Fuel Tank R.O.P.S. Roll cage Removal Required Tools Combination/Socket Wrenches Screwdriver (Phillips) 7-18 3. Loosen the clamps, then disconnect the vent and filler hoses from the fuel tank as shown. Lay them aside. (fig. 7-18) 7-21 4.

  • Page 51: Rear Console

    Rubber Track Utility Vehicle 7. Chassis and Fuel Tank Rear Console Removal Required Tools Combination/Socket Wrenches Screwdriver (Blade/Phillips) 1. Removal of the rear console requires the removal of the engine cover, R.O.P.S., cargo bed, battery, air cleaner, and heater (if equipped) assemblies. Please refer to the appropriate sections of this 7-24 manual for direction in the removal of these prior...

  • Page 52: Torsion Axles

    Rubber Track Utility Vehicle 7. Chassis and Fuel Tank Torsion Axles (undercarriages) Removal Required Tools Hydraulic jack (rolling style) Combination/Socket Wrenches 1. Raise and support the Scout on jack stands according to the jacking procedure on page 4-2 of this manual. 7-29 2.
  • Page 53 Rubber Track Utility Vehicle 7. Chassis and Fuel Tank remove 7-34 5. Remove the bolts securing the undercarriages to the torsion axles. (fig. 7-34) 6. Support the undercarriages with a forklift or hydraulic jacks (rolling style), then slide them off of the axles.

  • Page 54: Radiator And Oil Cooler

    8. Radiator and Oil Cooler Chapter Overview Removal and Installation This chapter provides information on the disassembly Removal and installation procedures are provided for and assembly of the radiator/oil cooler and associated the following radiator/oil cooler components. components. If there is an issue that requires trou- bleshooting, refer to chapter 15, Troubleshooting.

  • Page 55: Fan, Fan Spacer & Shrouding

    Rubber Track Utility vehicle 8. Radiator and Oil Cooler 2. Make sure the machine has cooled thoroughly, then remove the radiator cap and drain the fluid from the radiator through the small drain valve located on the lower left side of the radiator when viewed from the operator’s perspective.
  • Page 56 Rubber Track Utility vehicle 8. Radiator and Oil Cooler 2. Remove the bolts securing the fan and spacer to the engine, then remove the fan and spacer from the machine. (fig. 8-7, 8-8) 3. Once the fan has been removed, the shroud and guard can simply be lifted out of the machine as shown.
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  • Page 58: Hydraulic Reservoir

    9. Hydraulic Reservoir Chapter Overview Removal and Installation This chapter provides removal and installation proce- Removal and installation procedures are provided for dures for the hydraulic reservoir. the following hydraulic components. Personal Safety • Hydraulic Reservoir (tank) • Suction Screen !WARNING! Note: Procedures are provided for only those hydraulic com- Improper or incomplete maintenance/repair of a Rubber...
  • Page 59 Rubber Track Utility Vehicle 9. Hydraulic Reservoir 1. Drain the hydraulic fluid from the reservoir by fol- lowing the procedure described on page 4-8 of this disconnect manual. 2. Remove the cargo bed from the machine accord- ing to the procedure on page 7-3 of this manual. 6.

  • Page 60: Suction Screen

    Rubber Track Utility Vehicle 9. Hydraulic Reservoir Installation 1. To reinstall the hydraulic reservoir, reverse the removal procedure. Suction Screen Removal Required Tools Combination/Socket Wrench 1. Remove the cargo bed as described in the proce- dure on page 7-3 of this manual. 2.
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  • Page 62: 10. Hydraulic Components

    10. Hydraulic Components Chapter Overview Removal and Installation This chapter provides removal and installation proce- Removal and installation procedures are provided for dures for various hydraulic components. the following hydraulic components. Personal Safety • Charge/Auxiliary Pump • Tandem (Drive) Pump !WARNING! •...

  • Page 63: Tandem (Drive) Pump

    Rubber Track Utility Vehicle 10. Hydraulic Components 1. Relax any hydraulic actuators to relieve pressure within the hydraulic system. 2. Turn the ignition switch to the OFF position and remove the key to avoid accidental start. 3. Drain the hydraulic fluid. Refer to page 4-8 for the hydraulic fluid and filter change procedure.
  • Page 64 Rubber Track Utility Vehicle 10. Hydraulic Components disconnect 10-6 10-9 6. Disconnect the hoses from the brass pump return outlet fitting. (fig. 10-9) 10-7 10-10 4. Loosen and disconnect all of the hoses from the drive pump fittings with the exception of the drive hoses.
  • Page 65 Rubber Track Utility Vehicle 10. Hydraulic Components Top & Bottom Drive Pump Hoses From Drive Motor Charge Tank (LT) Pump (return) input shaft 10-12 Rear Front Drive Motor 10-15 9. Once the bolts have been removed, slide the • View is from the right. (RT) Bottom pump backwards out of the engine.
  • Page 66 Rubber Track Utility Vehicle 10. Hydraulic Components Two-Speed/Brake manifold Removal Required Tools disconnect Combination Wrench Socket Wrench 1. Relax any hydraulic actuators to relieve pressure within the hydraulic system. 2. Turn the ignition switch to the OFF position and 10-20 remove the key to avoid accidental start.

  • Page 67: Shuttle Block

    Rubber Track Utility Vehicle 10. Hydraulic Components Shuttle Block remove Removal Required Tools Combination Wrench Socket Wrench 1. Relax any hydraulic actuators to relieve pressure within the hydraulic system. 2. Turn the ignition switch to the OFF position and 10-25 remove the key to avoid accidental start.

  • Page 68: Pilot Generation Block

    Rubber Track Utility Vehicle 10. Hydraulic Components Pilot Generation Block Removal Required Tools Combination/Socket Wrenches Crows foot 1. Relax any hydraulic actuators to relieve pressure within the hydraulic system. 2. Turn the ignition switch to the OFF position and 10-29 remove the key to avoid accidental start.

  • Page 69: Auxiliary Valve/Solenoid Block Assembly

    Rubber Track Utility Vehicle 10. Hydraulic Components Auxiliary Valve/Solenoid Block Assembly Removal Required Tools Combination/Socket Wrenches 1. Relax any hydraulic actuators to relieve pressure within the hydraulic system. 10-34 2. Turn the ignition switch to the OFF position and remove the key to avoid accidental start. 7.

  • Page 70: Steering Valve & Plunger

    Rubber Track Utility Vehicle 10. Hydraulic Components Steering Valve & Plunger Removal Required Tools Combination/Socket Wrenches Hydraulic Caps/Plugs Allen Wrenches (t-handle) 1. Relax any hydraulic actuators to relieve pressure within the hydraulic system. 10-39 2. Remove the dash panel as described on page 6-6 of this manual.

  • Page 71: Directional Control Valve

    Rubber Track Utility Vehicle 10. Hydraulic Components Directional Control Valve Removal Required Tools Combination/Socket Wrenches Hydraulic Caps/Plugs Allen Wrenches (t-handle) 1. Relax any hydraulic actuators to relieve pressure within the hydraulic system. 10-44 5. Disconnect the tubes from the control valve as shown.

  • Page 72: 11. Engine

    11. Engine Chapter Overview Removal and Installation This chapter provides procedures for the removal and Removal and installation procedures are provided for installation of the engine and associated components. the following engine related components. If there is an issue that requires troubleshooting, refer to Chapter 15, Troubleshooting.
  • Page 73 Rubber Track Utility Vehicle 11. Engine Exhaust System Removal Required Tools Combination/Socket Wrench Pliers (if jointed section must be disassembled) Penetrating Lubricant !WARNING! 11-3 The exhaust system is very hot at operating tem- perature. Make sure the machine is off and cool 3.
  • Page 74 Rubber Track Utility Vehicle 11. Engine 11-8 11-11 4. Remove the bolts securing the tailpipe to the chas- 7. Slide the jointed section of pipe off of the header sis opening as shown. (fig. 11-8) down tube and remove. (fig. 11-11) Note: Use caution not to damage the pipe or connec- tion point during removal.

  • Page 75: Air Cleaner Housing

    Rubber Track Utility Vehicle 11. Engine Air Cleaner Housing Removal Required Tools Combination/Socket Wrench 1. Remove the engine cover and open the passenger side access door on the rear console to access loosen clamp the air cleaner. 11-16 5. Loosen the hose clamp securing the intake hose to the air cleaner housing.

  • Page 76: Engine

    Rubber Track Utility Vehicle 11. Engine Engine Removal Required Tools Combination/Socket Wrenches Engine Hoist & Straps/Chains !WARNING! The engine is very hot at operating temperature. Make sure the machine is off and cool before 11-20 attempting to service the engine or any related components.
  • Page 77 Rubber Track Utility Vehicle 11. Engine 11-23 11-26 7. Once all connectors have been disconnected, 10. Remove the bolts (4) securing the engine mounts remove the various p-clamps that secure the har- to the chassis. (fig. 11-26) ness to the engine, then lay the harness aside. remove (fig.
  • Page 78 Rubber Track Utility Vehicle 11. Engine Installation 1. To install the engine, reverse the removal proce- dure. !WARNING! Once the engine has been installed, make sure to properly reconnect and install all items removed during engine removal to ensure proper operation. Prior to starting, make sure all fluids are at appropriate levels and that they have not been contaminated with dirt or debris during service.
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  • Page 80: 12. Undercarriage

    1. Raise the machine off of the ground and mechani- Accidental machine starting can cause injury or even cally support it on ASV jack stands at a height that death to personnel working on a Rubber Track Utility allows just enough clearance for track removal. The Vehicle.
  • Page 81 Rubber Track Utility Vehicle 12. Undercarriage Note: If the inner wheels need to be removed, you must remove the bolts securing the undercarriages to the torsion axles, then slide the undercarriages out away from the chassis slightly to provide clearance for the wheels to be removed from their axles.
  • Page 82 5. Remove the nut and washer from the axle, then Snap ring pliers remove the wheel from the axle. (fig. 12-9) ASV approved jack stands (2) 1. Perform the track removal procedure on pages 4- Installation 10 and 4-11 of this manual to remove the outer 14”...
  • Page 83 Rubber Track Utility Vehicle 12. Undercarriage 12-11 12-14 3. Remove the cap from the outboard bearing assembly as shown. The cap will be destroyed 6. Once loose, remove the bearing assembly from upon removal and must be replaced. (fig. 12-11) the sprocket shaft as shown.

  • Page 84: Drive Motor

    Rubber Track Utility Vehicle 12. Undercarriage Drive Motor Removal Required Tools Socket/impact wrench & sockets Combination wrenches Hydraulic caps and plugs 1. Perform the track removal procedure on pages 4- 10 and 4-11 of this manual to remove the track 12-19 from the undercarriage.

  • Page 85: Grease Tensioner

    Rubber Track Utility Vehicle 12. Undercarriage Grease Tensioner Removal Required Tools Socket/impact wrench & sockets Combination wrenches Plastic/rubber hammer 1. Perform the track removal procedure on pages 4- 10 and 4-11 of this manual to remove the track 12-25 from the undercarriage. 5.

  • Page 86: Hydraulic Component Service

    Service Procedures and repair of hydraulic components. Components should not be serviced during the warranty period without written instruction from the ASV service department. Component disassembly dur- ing this period may void the manufacturer’s warranty. Chapter Overview Disassembly & Assembly...
  • Page 87 Rubber Track Utility Vehicle 13. Hydraulic Component Service Cylinder Tube Weldment 13-2 13-5 4. Use an open end or pipe wrench to turn and 7. With the piston and rod removed from the cylinder, remove the end gland. (figure 13-2) inspect the cylinder bore for scratches or other damage.
  • Page 88 Rubber Track Utility Vehicle 13. Hydraulic Component Service 13-8 13-11 13. Remove the tandem seals from the end gland pay- ing close attention to the order of removal to aid during installation of the new seals. (fig. 13-11) 13-9 13-12 11.

  • Page 89: Auxiliary Control Valve

    Rubber Track Utility Vehicle 13. Hydraulic Component Service Auxiliary Control Valve Note: Be careful not to lose the spring or poppet that sit inside each valve section, these will be reused. Disassembly Required Tools Socket Wrench Combination Wrench spool Screwdriver (blade type) Low Profile Needle Nose Pliers 1.

  • Page 90: Drive Motor (Brake Portion)

    Rubber Track Utility Vehicle 13. Hydraulic Component Service Drive Motor (brake portion) Disassembly Required Tools Shims Allen Wrench/Socket Rubber Mallot (seal removal if needed) Screwdriver (blade type) (seal removal if needed) 1. With machine off and cool and with hydraulic actu- ators relaxed, remove the drive motor from the undercarriage by following the procedure on page 12-5 of this manual.

  • Page 91: Drive Motor (Motor Portion)

    Rubber Track Utility Vehicle 13. Hydraulic Component Service Drive Motor (motor portion) Disassembly Required Tools Allen Wrench/Socket Seal Snap Ring Pliers Screwdriver (blade type) (seal removal if needed) Bolts 13-24 9. Inspect the seal for any damage. (fig. 13-24) 10. Remove the allen bolts securing the upper casting to the drive motor.
  • Page 92 Rubber Track Utility Vehicle 13. Hydraulic Component Service Surfaces 13-30 13-33 3. Lift and remove the piston block to expose the sealing surfaces. Inspect these surfaces to ensure Ring Groove there is no scratching or abrasion that may affect Ring operation.

  • Page 93: Posi-Power Relief Valve

    Rubber Track Utility Vehicle 13. Hydraulic Component Service Drive Pump (Drive Relief Valves) Disassembly & Adjustment Required Tools Allen Wrench/Socket Combination/Socket wrench 1. With machine off and cool and with hydraulic actu- ators relaxed, remove the drive pump from the machine by following the procedure in section 10.

  • Page 94: Drive Pump Disassembly

    Rubber Track Utility Vehicle 13. Hydraulic Component Service Drive Pump Disassembly Required Tools Combination/Socket wrench Allen Wrench/Socket Rubber Mallot Screwdriver (blade type) Snap RIng Pliers 13-43 3. Remove the valve plate and inspect it for damage or wear, specifically, scratches that can be felt with a fingernail.
  • Page 95 Rubber Track Utility Vehicle 13. Hydraulic Component Service Bearings Swash Plate 13-46 13-49 7. Using a rubber mallot, gently tap the shaft and bearing out of the case for inspection or replace- ment. (fig. 13-49) Surfaces 13-47 5. Remove the swash plate along with the bearings and inspect them for any damage or scratching that could affect operation.

  • Page 96: Drive Pump Assembly

    Rubber Track Utility Vehicle 13. Hydraulic Component Service Drive Pump Assembly Required Tools Combination/Socket wrench Allen Wrench/Socket Rubber Mallot Screwdriver (blade type) Snap Ring Pliers 13-52 4. Flip the assembly over and lay it on a table, then remove the pivot caps from both sides as shown. (fig.

  • Page 97: Auxiliary Pump

    Rubber Track Utility Vehicle 13. Hydraulic Component Service Auxiliary Pump Disassembly Required Tools Allen Wrench/Socket Snap Ring Pliers 1. With machine off and cool and with hydraulic actu- ators relaxed, remove the drive pump from the machine by following the procedure on page 10-1. 13-55 7.
  • Page 98 Rubber Track Utility Vehicle 13. Hydraulic Component Service O-ring Inspect Faces 13-61 13-64 5. Inspect the various o-rings on the lower pump components for any signs of damage, replace if 6. Inspect the spacer block faces (both sides) and necessary. (fig. 13-61) pump gears for scratches or any other damage that can be felt with a fingernail.
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  • Page 100: 14. Hydraulic Pressure

    To inspect for used for general pressure checks and troubleshooting. contamination, remove the hydraulic filter and inspect it for debris. If contamination is suspected, contact the ASV service department at 1-800-346-4367. 14-1 https://tractormanualz.com/...
  • Page 101 Rubber Track Utility Vehicle 14. Hydraulic Pressure Test & Troubleshooting 1. Attach the gauge to test port A. (fig. 14-1) Route Charge Relief the gauge so that you or an assistant can read it during testing. 2. Make sure any bystanders are clear of moving components, then start the engine.
  • Page 102 Rubber Track Utility Vehicle 14. Hydraulic Pressure Test & Troubleshooting Auxiliary Pressure Check Required Tools Pressure Gauge 0-6000 p.s.i. (& Q/C adapters) Auxiliary pressure is used to drive hydraulic attach- ments. Low auxiliary pressure can produce poor per- formance in attachments while high pressure can cause component damage/failure in the machine or the attachment being utilized.
  • Page 103 Rubber Track Utility Vehicle 14. Hydraulic Pressure Test & Troubleshooting Drive Pressure Check Check your readings against that stated below. If your readings differ, relief replacement and or component Required Tools repair may be required. Pressure Gauge 0-6000 p.s.i. Pressures should read: •...
  • Page 104 Rubber Track Utility Vehicle 14. Hydraulic Pressure Test & Troubleshooting Posi-Power Pressure Check 3. Attach a gauge to the quick coupler and route it so that you or an assistant can read the gauge during Posi-power is a function of the tandem drive pump operation.
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  • Page 106: Troubleshooting

    15. Troubleshooting Chapter Overview Visual Inspection This chapter contains basic troubleshooting proce- Prior to troubleshooting, walk around the machine and dures for the SC-50 Rubber Track Utility Vehicle. perform an overall visual inspection. Look for missing, loose, worn or broken parts. Pay particular attention to Additional troubleshooting aids are provided in Chapter the following items: 3 (Circuit Diagrams) and in chapters containing disas-...
  • Page 107 Rubber Track Utility vehicle 15. Troubleshooting Problem Problem Machine cranks, but will not start. Hydraulic oil light illuminated; hydraulic system over- Possible causes: heating. 1. Fuel tank empty, fuel filter plugged or fuel line Possible causes: restricted. 1. Debris plugging oil cooler, limiting airflow. 2.

  • Page 108: Lubricant And Fuel Specifications

    When replacing or replenishing the fluids and lubri- In North America, diesel fuel, distilled from crude oil, cants in any ASV Rubber Track Utility Vehicle, use identified as No. 1-D or No. 2-D in “ASTM D975” gen- ASV Posi-Lube products. This ensures that the new erally meet machine requirements.
  • Page 109 Intentionally left blank https://tractormanualz.com/...

  • Page 110: Service Aids And Supplements

    17. Service Aids & Supplements General Torque Specifications Inch Fasteners Metric Fasteners Thread Size Standard Torque Thread Size Standard Torque 1/4" 9 +/- 2 lb ft 12 +/- 3 Nm 5/16" 18 +/- 4 lb ft 28 +/- 7 Nm 3/8"...
  • Page 111 Terex Construction Americas 8800 Rostin Road Southaven, MS 38671 (888)-201-6008 (662)-393-1800 www.terex.com https://tractormanualz.com/...

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