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Mighty Mac WC475 Safety & Operating Instructions Manual

Gravity self-feeding wood chipper
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Gravity Self-Feeding Wood Chipper
Serial No.
P/N: 950-2000
Published: 01/14/2020
Read and understand this manual and all instructions before operating or servicing this GRAVITY SELF-FEEDING WOOD
CHIPPER.
Safety & Operating Instructions
WC475/475E & WC575E
MacKissic
Toll-free phone: (800)-348-1117
Fax: (610)-495-5951
Website: www.MacKissic.com

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  • Page 1 Safety & Operating Instructions Gravity Self-Feeding Wood Chipper WC475/475E & WC575E MacKissic Toll-free phone: (800)-348-1117 Serial No. Fax: (610)-495-5951 Website: www.MacKissic.com P/N: 950-2000 Published: 01/14/2020 Read and understand this manual and all instructions before operating or servicing this GRAVITY SELF-FEEDING WOOD...

  • Page 2: Table Of Contents

    Table of Contents Chapter 1: General Safety Rules ..................... 3 Chapter 2: Setting Up the GRAVITY SELF-FEEDING WOOD CHIPPER ........9 Chapter 3: Operating Your GRAVITY SELF-FEEDING WOOD CHIPPER ........19 Chapter 4: Maintaining the GRAVITY SELF-FEEDING WOOD CHIPPER ........25 Chapter 5: Troubleshooting ......................

  • Page 3: Chapter 1: General Safety Rules

    Chapter 1: General Safety Rules • Read this Safety & Operating Manual before you use the SELF-FEEDING Wood Chipper. Become familiar with the operation and service recommendations to ensure the best performance from your machine. • Thoroughly inspect the area in which you will be working and remove all foreign objects. Look for Rope, Wire, ECT., and remove these objects before chipping.
  • Page 4 930-0009 930-0004 930-0011 930-0008 930-0010 930-0001 091-0043 930-0003 (Highway Accessory Only) 930-0006 (Electric Start Model Only) 930-0013 MACKISSIC GRAVITY SELF-FEEDING WOOD CHIPPER...

  • Page 5: Protecting Yourself And Those Around You

    Protecting Yourself and Those Around You This is a high-powered machine, with moving parts operating with high energy at high speeds. You must operate the machine safely. Unsafe operation can create a number of hazards for you, as well as anyone else in the nearby area. Always take the following precautions when using this machine: •...

  • Page 6: Safety With Gasoline - Powered Machines

    Safety with Gasoline - Powered Machines Gasoline is a highly flammable liquid. Gasoline also gives off flammable vapor that can be easily ignited and cause a fire or explosion. Never overlook the hazards of gasoline. Always follow these precautions: • Never run the engine in an enclosed area or without proper ventilation as the exhaust from the engine contains carbon monoxide, which is an odorless, tasteless, and deadly poisonous gas.

  • Page 7: General Safety

    Road Towing Safety (For Highway Accessory Only) • Before towing, be certain the Gravity Self-Feeding Wood Chipper is correctly and securely attached to the towing vehicle and the safety chains are in place. Leave slack in the chains to allow for turning. •...

  • Page 8: A Note To All Users

    General Safety Continued • If the cutting mechanism strikes a foreign object or if your machine should start making an unusual noise or vibration, shut down the engine, wait for all moving parts to come to a complete stop (the flywheel will continue rotating for a while after the engine is shut down), disconnect spark plug wire, keeping it away from the spark plug to prevent accidental starting, then wait 5 minutes before inspecting for clogging or damage.

  • Page 9: Chapter 2: Setting Up The Gravity Self-Feeding Wood Chipper

    Chapter 2: Setting Up the GRAVITY SELF-FEEDING WOOD CHIPPER This chapter outlines assembly and a few simple steps you will need to follow to set up your new machine before you use it. It may be helpful to familiarize yourself with the controls and features of your GRAVITY SELF-FEEDING WOOD CHIPPER as shown in Figure 1 before beginning these procedures.

  • Page 10: Specifications

    Specifications Models WC475 Manual and Electric Start Models WC575E Engine Briggs & Stratton (See Engine Manual for Engine Briggs & Stratton Electric Start (See Engine Manual Specifications) for Engine Specifications) Series XR1650 XR2100 Chipping Capacity 4-3/4" Diameter 5-3/4" Diameter Number of Chipper Knives Chipper Knife Size 6-1/4"...
  • Page 11 Hardware Package Parts: PART NUMBER DESCRIPTION WHERE USED 090-0639 5/16-18 THIN NYLOCK NUTS HOPPER 090-0748 5/16-18 X 3/4" TRUSS BOLTS HOPPER 090-0475 5/16-18 SAE FLATWASHERS HOPPER 090-0702 5/16-18 X 4-1/2" HHCS DISCHARGE 090-0460 5/16-18 NYLOCK NUTS DISCHARGE 090-0088 5/16-18 X 1" HHCS HITCH BRKT 090-0460 5/16-18 NYLOCK NUTS...
  • Page 12 Installing the Tow Bar Note: For easier installation, keep the machine on the pallet and supports until the Tow Bar is installed. Tools Needed: • 7/16 Wrench • Two 9/16" Wrenches • Two 1/2" Wrenches Base Tow Bar B Position the Tow Bar under the Base and secure the front Bracket Tow Bar Tow Bar with two 3/8-16 x 1"...
  • Page 13 Installing the Tow Bar and Lights for the Highway Accessory Note: For easier installation, keep the machine on the pallet and supports until the Tow Bar is installed. Tools and Supplies Needed: • 7/16 Wrench • Wires Two 1/2" Wrenches Wires •...
  • Page 14 Tail Light Mount a Light Bracket to both sides of the Chipper with two 5/16-18 x Tail Light Light Mounting 3/4" Bolts and Locknuts each using two 1/2 Wrenches (Figure 12). Side Light Side Light Bracket 10. Attach the Lights to the mounting brackets with the Locknuts that are included on the Lights using a 7/16"...

  • Page 15: Attaching The Hopper Assembly

    Housing Stu Attaching the Hopper Assembly Note: We recommend that you have someone help you lift the Hopper in place and support it until it is secured to the Chipper. Tools Needed: • One 1/2” Wrench and One Phillips Head Screwdriver 1.
  • Page 16 Discharge Bolts, Washers Attaching the Discharge Chute Chute and Locknuts Tools Needed: • Two 1/2" Wrenches Discharge 1. Loosen the two 4-1/2" long 5/16-18 Bolts holding the scroll. Chute Bolts, Washers, and Locknuts 2. Position the Discharge Chute facing away from the Hopper as shown Chipper Chipper and secure with two 4-1/2"...

  • Page 17: Adding Engine Oil And Gasoline

    To get an accurate reading when checking the oil level: - The machine should be on a level surface. - The dipstick should be pushed all the way down and turned a quarter turn clockwise for the WC475 Model (long Dipstick) to ensure an accurate oil level reading.
  • Page 18 Operating Range 1. Remove the Gas Fill Cap and fill the Gas Tank with fresh, unleaded Figure 21a: WC475 gas (with a minimum of 85 Octane) to approximately 1" to 1-1/2" below Model the top of the fill neck to allow for fuel expansion. Be careful not to overfill and reinstall the Gas Fill Cap before starting the engine.

  • Page 19: Chapter 3: Operating Your Gravity Self-Feeding Wood Chipper

    Chapter 4 for info on accessing the Chipper Knife. Area • At engine start-up, the engine of your MIGHTY MAC CHIPPER operates under no load until approximately 1800 RPM, at which speed the Centrifugal Clutch engages and begins driving the Rotor Assembly.

  • Page 20: Processing Material

    Use common sense when using the Machine. Learn to recognize the change in sounds when overloaded. Turn Off the Engine immediately if the machine becomes jammed to prevent damage to the Drive System • Your GRAVITY SELF-FEEDING WOOD CHIPPER can process dry or green wood up to 4-3/4" (WC475) or 5-3/4" (WC575E) in diameter. •...

  • Page 21: Stopping The Engine

    Choke Lever Throttle Control Starting the Engine (Manual Start Model) Lever Ensure that the Fuel Shut-Off is in the “ON” position to the right (Figure 25). Move the Choke Control Lever to the “CHOKE” position to the left (leave in the RUN position to the right if the engine is already warm). Move the Throttle Control Lever to about half way between Slow (turtle) and Fast (rabbit) position.
  • Page 22 Connecting the Chipper to your Tractor Lift the Chipper Tow Bar onto the Tractor Hitch and install the Hitch Pin and Hitch Clip to secure it (Figure 27). Pull the Hitch Clip from the Pin and pull the Pin from the Support Leg and Tow Bar (Figure 28).

  • Page 23: Hitch Coupler Adjustment Check

    For extra safety and security, you may want to purchase a Lock or Lock Pin to install into the Latch Assembly of the Tow-Hitch Package (Figure 32). Connect the Wire Harness Connector to your Tow Vehicle and ensure that your lights on the Chipper are working properly. Lock or Lock Pin Avoid death or serious injury.

  • Page 24: To Free A Jammed Flywheel

    To Free a Jammed Flywheel Shut down the Engine (The flywheel will continue to rotate for a while after the engine is shut off), Wait 5 minutes for the engine to cool and all moving parts to come to a complete stop, remove spark plug wire and disconnect the negative battery cable before moving or working on the chipper.

  • Page 25: Chapter 4: Maintaining The Gravity Self-Feeding Wood Chipper

    Chapter 4: Maintaining the GRAVITY SELF-FEEDING WOOD CHIPPER This chapter covers regular maintenance procedures that will ensure the best performance and long life of your GRAVITY SELF- FEEDING CHIPPER. For engine maintenance, please refer to the Engine Owner’s Manual that came with your machine. Service intervals listed in the checklist below supersede those listed in the Engine Owner’s Manual.

  • Page 26: Grease Fittings

    Inner Guard Inner Guard Grease Fittings Belt Your SELF-FEEDING CHIPPER was greased at the Factory. The operator Guard needs to periodically lubricate the two Bearings of the Chipper Assembly. Screws Tools and Supplies needed: • Two 1/2" Wrenches • Bolt, Washer Bolt, Washer, Flexible hose grease gun and Locknut...

  • Page 27: Removing And Replacing The Engine Oil

    Use only MacKissic Belts on your machine. The belts have been Tested and proven for many hours of use. Oil Drain Plug Oil Drain Plug Figure 40b: Note: The WC475 Model has one Belt and the WC575E has two. WC575E Tools Needed: Inner Guard Model •...
  • Page 28 Flywheel Shaft d) When the Sheave is loose, remove the two Bolts and reinsert them into the original Retaining Bolt holes by hand. Figure 45a: WC475 e) Using the Straightedge, align the Clutch and Sheave by moving Model the Sheave Bushing in or out on the Flywheel Shaft.
  • Page 29 Figure 45b: WC575E Model Place a Straightedge along the Belt (over the Clutch and Sheave) and push down firmly on the Belt to measure the deflection from the Straightedge to the Belt with a tape measure (Figure 46). The measurement should be approximately 3/8" with approximately 10 pounds of force applied to it. If the measurement is not correct, loosen the Engine Bolts and tighten or loosen the Adjusting Nut as needed (Figure 42).
  • Page 30 VISUAL Inspection of the Chipper Knife (Before every use) and Wear Plate (minimum every 25 hours) Routinely check the wear plate for a sharp square edge. Using a rounded or chipped wear plate will decrease performance and cause excessive vibration that will cause damage to the GRAVITY SELF-FEEDING WOOD CHIPPER and make chipping difficult for the operator.

  • Page 31: Removing And Replacing The Chipper Knife

    Removing and Replacing the Chipper Knife Tools Needed: Access • Cover Locknuts 7/16" Wrench • 1/2" Socket with extension • 3/16" Allen wrench • Awl or Sharp Tool • Gloves Loosen the Locknuts that secure the rear Access Cover with a 7/16" Wrench (Figure 50).

  • Page 32: Checking And Adjusting The Knife To Wear Plate Gap

    Checking and Adjusting the Knife to Wear Plate Gap When you replace the Knife or Wear Plate you must check and set the clearance between the Knife and Wear Plate. Set this clearance or gap to 1/16" by using the Gap Tool that is supplied with the Chipper and with a new Knife kit. If the gap between the Wear Plate and the Knife is not set correctly, you will have excessive vibration when chipping and the Knife will seem to be dull.

  • Page 33: Chipper Knife Sharpening

    Chipper Knife Sharpening • You should never attempt to sharpen the Chipper Knife freehand. • Chipper It is extremely important to consistently maintain the 45-degree Knife angle for proper performance (Figure 56). • Excessive heat generated during the sharpening process will damage Knives and weaken the metal.
  • Page 34 Wear Plate Sharpening File this edge flat The Wear Plate edges become rounded and chipped during use and must be squared off to ensure efficient operation. Tools Needed: • Wear Flat File Plate Secure the Wear Plate in a vise. File the edge of the Wear Plate to take out any nicks and to square Front View End View...

  • Page 35: Removing And Replacing The Clutch

    Remove the Tire and replace it with a new wheel assembly. Screw the Castle Nut onto the Axle and tighten it with an adjustable wrench to seat the Bearings (Figure 61). Back the Castle Nut off and then snug it up to the Bearing lightly. Insert a Cotter Pin through the slots of the Castle Nut and into the hole in the Axle.

  • Page 36: Charging The Battery

    Installing a new Clutch Assembly Note: If a Clutch part malfunctions, it could jeopardize the integrity of other Clutch components. If you have problems with the Clutch, a Clutch Kit is available, but we recommend replacing your Clutch as a complete assembly.

  • Page 37: Recycling A Used Battery

    Recycling a Used Battery Please dispose of your used batteries responsibly by recycling them. Call your local Solid Waste Management District or your local waste handler to locate the collection site nearest you. Some collection sites recycle batteries year-round; others collect them periodically. You can also visit the Website of Earth 911 for more information (www.earth911.org).

  • Page 38: Chapter 5: Troubleshooting

    Chapter 5: Troubleshooting Most problems are easy to fix. Consult the Troubleshooting Table below for common problems and their solutions. If you continue to experience problems, contact us at www.MacKissic.com or call (800)348-1117 for support. Shut down the Engine (The flywheel will continue to rotate for a while after the engine is shut off), Wait 5 minutes for the engine to cool and all moving parts to come to a complete stop, remove spark plug wire and disconnect the negative battery cable before moving or working on the chipper.
  • Page 39 Troubleshooting Table (continued) Shut down the Engine (The flywheel will continue to rotate for a while after the engine is shut off), Wait 5 minutes for the engine to cool and all moving parts to come to a complete stop, remove spark plug wire and disconnect the negative battery cable before moving or working on the chipper.
  • Page 40 Check oil level regularly. • Air-cooled engines burn about an ounce of oil per cylinder, per hour. • Fill to mark on dipstick. DO NOT OVERFILL. Oil Fill Capacity: WC475 & WC475E WC575EE Engine Model XR1650 Series XR2100 Series Engine Part Number...
  • Page 41 Spark Plug Information: WC475 & WC475E WC575EE Engine Model XR1650 Series XR2100 Series Spark Plug Part Number (B&S)

  • Page 42: Chapter 6: Chipper Accessories

    Chapter 6: Chipper Accessories Shut down the Engine (The flywheel will continue to rotate for a while after the engine is shut off), Wait 5 minutes for the engine to cool and all moving parts to come to a complete stop, remove spark plug wire and disconnect the negative battery cable before moving or working on the chipper.
  • Page 43 OPERATION Extended Top-Discharge Adjusting the Extended Top-Discharge Chute Discharge Direction: Chute Pull the Hitch Clip and remove the Locking Pin (Figure 66). Rotate the Extended Top-Discharge Chute to the direction desired. 180° Note: The Extended Top-Discharge Chute has a range of motion of 180˚ that spans the front and both sides of the Chipper.

  • Page 44: Chapter 7: Parts List And Schematic Diagrams

    090-0720 Shim, Shaft, 1/-1/4, .125 Thk 950-3106-BL Base, (WC575E) 030-0452 Shim, Shaft, 1/-1/4, .075 Thk 030-0603 Engine, B&S, WC475 TQ, M/S 030-0451 Shim, Shaft, 1/-1/4, .050 Thk 030-0602 Engine, B&S, WC475 TQ, E/S 030-0450 Shim, Shaft, 1/-1/4, .025 Thk 030-0607 Engine, B&S, WC575E TQ, E/S...
  • Page 45 Schematic – Drive Assembly MACKISSIC GRAVITY SELF-FEEDING WOOD CHIPPER...
  • Page 46 Bolt, HCS, 5/16-18 x 4-1/2, Gr5 090-0470 Nut, Nylon Lock, 1/4-20 090-0048 Nut, Lock, 5/16-18, Gripco 940 -2046-GR Plate, Access, 3 Hole, (WC475) 940-2017-GR Tube, Scroll 940-3046-GR Plate, Access, 3 Hole, (WC575E) 940-2250 Flywheel, Balanced w/Knife, (WC475) 940-2012-GR Plate, Access, 2 Hole, (WC475)
  • Page 47 Schematic – Chipper Basic Assembly MACKISSIC GRAVITY SELF-FEEDING WOOD CHIPPER...
  • Page 48 940-3033 Spacer, Wheel, Long (WC575E) 940-2021-BL Bracket, Tow Bar, Front 940-2033 Spacer, Wheel, (WC475) 940-2018-BL Bracket, Tow Bar, Rear 940-3036 Spacer, Wheel, Short (WC475) 090-0610 U Bolt 940-2047 Support, Axle, (WC475) 090-0470 Nut, Nylon Lock, 1/4-20 940-3047 Support, Axle, (WC575E)
  • Page 49 Schematic – Base and Wheels Assembly MACKISSIC GRAVITY SELF-FEEDING WOOD CHIPPER...
  • Page 50 Bracket, Fender, (WC475) 913-0218 Hitch, Trailer 940-3025-BL Bracket, Fender, (WC575E) 090-0370 Bolt, HCS, 1/2-13 x 3, Gr5 940-2025R-BL Bracket, Fender, RH, (WC475) 090-0629 Nut, Nylon Lock, 1/2-13 912-3522 Chain, Safety, Class 1 940-3025-BL Bracket, Fender, (WC575E) 090-0123 Bolt, HCS, 3/8-16 x 3-1/2, Gr5...
  • Page 51 Schematic – Base and Wheels Assembly – Road Tow MACKISSIC GRAVITY SELF-FEEDING WOOD CHIPPER...

  • Page 52: Parts List - Hopper Assembly

    Shield, Blow Back, (WC475) 950-3080-GR Hopper, Top, (WC575E) 940-3071 Shield, Blow Back, (WC575E) 940-2081-GR Hopper, Bottom, (WC475) 940-0543 Support, Blow Back, (WC475) 950-3081-GR Hopper, Bottom, (WC575E) 940-0542 Support, Blow Back, (WC575E) 940-2082L-GR Hopper, Side, LH, (WC475) 090-0012 Bolt, HCS, 1/4-20 x 3/4, Gr5...

  • Page 53: Schematic - Hopper Assembly

    Schematic – Hopper Assembly MACKISSIC GRAVITY SELF-FEEDING WOOD CHIPPER...
  • Page 54 Parts List – High Discharge Accessory NOTE: Part numbers listed are available through MacKissic. Ref# Part# Description Ref# Part# Description 930-2120-GR Deflector Weldment 090-0470 Nut, Nylon Lock, 1/4-20 090-0066 Bolt, HCS, 5/16-18 x 3/4” 706-0924 Hair Spring Cotter 090-0476 SAE Washer, Flat, 5/16 940-2078-GR Plate, Bottom 090-0460...
  • Page 55 Notes: MACKISSIC GRAVITY SELF-FEEDING WOOD CHIPPER...
  • Page 56 Notes: CONTACT US AT www.MacKissic.com...

  • Page 57: End Of Season And Storage

    Daily Checklist for the GRAVITY SELF-FEEDING WOOD CHIPPER Shut down the Engine (The flywheel will continue to rotate for a while after the engine is shut off), Wait 5 minutes for the engine to cool and all moving parts to come to a complete stop, remove spark plug wire and disconnect the negative battery cable before moving or working on the chipper.

This manual is also suitable for:

Wc475eWc575e

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