Safety & Operating Instructions Gravity Self-Feeding Chipper WC375 Serial No. P/N: 950-1000 Published: 10/10/2019 MacKissic, Inc. Toll-free phone: 1-800-348-1117 Website: www.MacKissic.com Read and understand this manual and all instructions before operating or servicing this MacKissic Gravity Self Feeding Chipper.
Table of Contents Chapter 1: General Safety Rules ..........................................................................................................................3 Chapter 2: Setting Up the MACKISSIC GRAVITY SELF FEEDING CHIPPER .....................................................9 Chapter 3: Operating the MACKISIC GRAVITY SELF FEEDING CHIPPER………………………………………. 14 Chapter 4: Maintaining the MACKISSIC GRAVITY SELF FEEDING CHIPPER ..................................................
Chapter 1: General Safety Rules Read this safety & operating manual before you use the MACKISSIC GRAVITY SELF FEEDING 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, etc., and remove these objects before chipping. Inserting these objects into the chipper hopper could damage the machine and/or cause injury.
930-0004 930-0001 #137581 930-0010 930-0008 (with Pin Hitch Package only) 930-0013 4 MacKissic Gravity Self Feeding Chipper
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: Always wear protective goggles or safety glasses with side shields while chipping to protect your eyes from possible thrown debris.
Safety for Children and Pets Tragic accidents can occur if the operator is not alert to the presence of children and pets. Children are often attracted to the machine and the chipping activity. Never assume that children will remain where you last saw them. Always follow these precautions: Keep children and pets at least 100 feet from the working area and ensure they are under the watchful care of a responsible adult. Be alert and turn the machine off if children or pets enter the work area.
General Safety Operating this chipper safely is necessary to prevent or minimize the risk of DEATH OR SERIOUS INJURY. Unsafe operation can create a number of hazards for you. Always take the following precautions when operating this chipper: Keep in mind that the operator or user is responsible for accidents or hazards occurring to other people, their property, and themselves. Your MACKISSIC GRAVITY SELF FEEDING CHIPPER is a powerful tool, not a plaything. Exercise extreme caution at all times.
A Note to All Users Under California law, and the laws of some other states, you are not permitted to operate an internal combustion engine using hydrocarbon fuels without an engine spark arrester. This also applies to operation on US Forest Lands. All MACKISSIC GRAVITY SELF FEEDING CHIPPERS shipped to California, New Mexico and Washington State are provided with spark arresters.
Chapter 2: Setting Up the MACKISSIC GRAVITY SELF FEEDING 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 MACKISSIC GRAVITY SELF FEEDING CHIPPER as shown in Figure 1 before beginning these procedures. If you have any questions at all, please feel free to contact us at www.MacKissic.
Specifications Engine Ft-lbs Torque Starting Oil Capacity Fuel Tank Capacity Chipping Capacity Wheel Size Axle Number of Chipper Knives Chipper Knife Size Chipper Knife Material Adjustable Knife Wear Plate Chipper Flywheel Flywheel Weight Chipper Knife Tip Speed Hopper Material Frame Material Hopper Opening at Top Machine Weight Briggs & Stratton 11.50 Manual Recoil 20 oz. 3 Quarts 3-3/4" Diameter 4.10/3.50-4 Pneumatic w/ Tube 5/8" Diameter 1 4-1/4" x 1-1/4 x 9/32" Heat Treated Tool Steel Yes 14" Dia.
Hardware Bag Parts (Figure 3) PART NUMBER DESCRIPTION QTY WHERE USED 1 090-0639 5/16-18 THIN NYLOCK NUTS 8 HOPPER 2 090-0748 5/16-18 X 3/4" TRUSS BOLTS 8 HOPPER 3 090-0475 5/16-18 SAE FLATWASHERS 8 HOPPER 4 090-0090 5/16-18 X 1-1/2" HHCS 1 HANDLE 5 090-0702 5/16-18 X 4-1/2" HHCS 1 HANDLE 6 090-0460 5/16-18 NYLOCK NUTS 2 HANDLE 7 090-0448 5/16-18 X 3-1/2" HHCS 2 LOW DISCHARGE 6 090-0460 5/16-18 NYLOCK NUTS 2 LOW DISCHARGE 7 5 4 6 1 3 Figure 3 2 Attaching th
2. To install the transport handle, first remove and discard the 3-1/2" long shipping Bolt and shipping Locknut from the Housing (Figure 6). Position the Transport Handle as shown and loosely re-install the Bolt and Locknut. 3. Install a 1-1/2" long Bolt and Locknut through the remaining Transport Handle hole. 4. Remove 3-1/2"Shipping ShippingBolt Bolt and Remove 3-1/2" Shipping Locknut. Install 4-1/2" and Shipping Locknut.
Adding Gas 1. Gas Fill Cap Remove the Gas Fill Cap and fill the Gas Tank with fresh, unleaded gas (with a minimum of 85 Octane) to approximately 1" to 1-1/2" below the top of the fill neck to allow for fuel expansion (Figure 9). Be careful not to overfill and reinstall the Gas Fill Cap before starting the engine. See your Engine Owner’s Manual for more detailed information. Note: To refill the gas tank, turn the engine OFF and let the engine cool at least two minutes before removing the gas fill cap.
Chapter 3: Operating Your MACKISSIC GRAVITY SELF FEEDING CHIPPER Before Starting the Engine The design of this machine is for chipping wood. Never use this machine for any other purpose as it could cause serious injury. Contact with internal rotating parts will cause serious personal injury. Never put hands, face, feet, or clothing into chipper hopper or discharge opening or near the discharge area at any time.
Processing Material Always wear protective goggles or safety glasses with side shields while chipping to protect your eyes from possible thrown debris. Avoid wearing loose clothing or jewelry, which might catch on moving parts or the material fed into the chipper hopper. We recommend wearing gloves while chipping. Be sure your gloves fit properly and do not have loose cuffs or drawstrings. Wear shoes with non-slip treads when using your chipper.
Starting the Engine Choke Control Lever “RUN” “CHOKE” 1. Ensure that the Fuel Shut-Off Valve is in the “ON” position (Figure 10). 2. Move the Choke Control Lever to the “CHOKE” position if the engine is cold (Figure 12). Leave it in the RUN position if the engine is already warm. 3. Move the Throttle Control Lever to about half way between Slow and Fast position (Figure 13). 4. Slowly pull the Starter Cord until you feel resistance, then pull quickly (Figure 14).
To Free a Jammed Flywheel The flywheel will still rotate for A WHILE after the engine is shut off. Shut down the engine, wait for all moving parts to come to a complete stop, remove spark plug wire, then wait 5 minutes before moving or working on the chipper. Tool Needed: Two 1/2" Wrenches Disassemble: 1. Remove any material left in the Chipper Hopper. 2. Remove the Bolts and Locknuts from the Discharge Chute using 1/2" Wrenches (Figure 16). 3. Remove the Discharge Chute from the Chipper Housing.
Chapter 4: Maintaining the MACKISSIC GRAVITY SELF FEEDING CHIPPER This chapter covers regular maintenance procedures that will ensure the best performance and long life of your MACKISSIC 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. Maintenance Kits and Accessories are available through our website at www.MacKissic.com.
Tools and Supplies needed: Flexible hose grease gun Lithium grease Clean cloth 1/8” Allen Wrench Loctite 243 (if needed) 1. To gain access to the rear Chipper Bearing you must remove the Belt Cover (see “Removing, Replacing and Adjusting the Drive Belt” in this Chapter). 2. Wipe all dirt, etc., from the grease fittings with a clean cloth (Figure 18). 3.
Self Tapping Screws Removing, Replacing and Adjusting the Drive Belt Inner Guard The flywheel will still rotate for A WHILE after the engine is shut off. shut down the engine, wait for all moving parts to come to a complete stop, remove spark plug wire, then wait 5 minutes before moving or working on the chipper. Belt Guard Locknut and Washer Bolt, Washer and Locknut Use only MacKissic belts on your machine. The belts have been thoroughly tested and proven for many hours of use.
b) c) Using the Straightedge, align the Clutch and Sheave by moving the Sheave in or out on the Rotor Shaft. Do not make the adjustment by attempting to move the Clutch on the Engine Shaft. Recheck the alignment and then retighten the Sheave Hub Set Screws. 5. Tighten the Engine Hardware (Figure 22) 6. Place a Straightedge on the Belt (over the Clutch and Sheave) and push down on the Belt to measure the deflection from the Straightedge to the Belt with a tape measure (Figure 25).
Hopper Assembly Spacer 3. If the Knife has visible nicks or damage it must be sharpened or Spacer replaced (see “Removing and Replacing the Chipper Knife” in this chapter). 4. If the Knife does not appear to have any damage, replace the Access Cover and secure with nuts using a 7/16" wrench. INSPECTING THE CHIPPER KNIFE AND WEAR PLATE Bolts and Lock BoltsWashers and The hopper should be supported when the mounting hardware is removed. Removal of the hopper is difficult for one person.
4. Rotate the Flywheel using a long stick until the three countersunk Allen Screws and Lock Nuts attaching the Knife to the Flywheel are visible through the Access Cover and Hopper openings (Figure 31 and 32). 5. Clean out the heads of the Allen Screws with an Awl or Sharp Tool. 6. Insert a 3/16” Allen Wrench into the head of a screw. 7. While holding the Allen Wrench, remove the Lock Nut using a 1/2" socket. Be careful not to drop the Lock Nut into the Chipper. 8.
Checking and Adjusting the Knife to Wear Plate Gap When you replace the Knife, 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. The Wear Plate should have a square edge and be free of dents or gouges.
Chipper Knife Sharpening You should never attempt to sharpen the Chipper Knife freehand. It is extremely important to consistently maintain the 45-degree angle for proper performance (Figure 37). Excessive heat generated during the sharpening process will damage Knives and weaken the metal. Be sure not to overheat the Knife during sharpening because it will shorten the life of the Knife. Take the Chipper Knife to a machine shop for proper sharpening.
Wear Plate Sharpening The Wear Plate edges can become rounded and chipped during use and must be squared off to ensure efficient operation. Tools Needed: Flat File Straightedge File this edge flat 1. Secure the Wear Plate in a vise. 2. File the edge of the Wear Plate to take out any nicks and to square rounded edges (Figure 39). 3. Check with a Straightedge to ensure that the Wear Plate edge is flat and straight.
Removing and Replacing the Clutch The flywheel will still rotate for A WHILE after the engine is shut off. Shut down the engine, wait for all moving parts to come to a complete stop, remove spark plug wire, then wait 5 minutes before moving or working on the chipper. The design of the Clutch on your machine is for rugged, dependable service; however, it is important to understand the limitations of a Clutch.
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. Tools and Supplies Needed: Key CLUTCH REMOVED Keyway Engine Crankshaft Bolt, Lock Washer and flat Washer Clutch 9/16" Wrench Anti-seize compound 1.
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 1-800-348-1117 for support. The flywheel will still rotate for A WHILE after the engine is shut off. Shut down the engine, wait for all moving parts to come to a complete stop, remove spark plug wire, then wait 5 minutes before moving or working on the chipper.
Troubleshooting Table (continued) SYMPTOM POSSIBLE CAUSE - Clutch overheats. - Belt burns. - Flywheel won’t turn. Immediately stop the engine and disconnect the spark plug wire. Turn the Flywheel with a wooden stick to be sure it turns freely. Check for a loose Drive Belt. See Chapter 4. Remove any built up debris from the Chipper Hopper Inlet and Discharge Chute. The machine has excessive vibration. Check for a dull or damaged Knife; sharpen or replace the Knife. See Chapter 4.
Chapter 6: Chipper Accessories The flywheel will still rotate for A WHILE after the engine is shut off. Shut down the engine, wait for all moving parts to come to a complete stop, remove spark plug wire, then wait 5 minutes before moving or working on the chipper. WC375 NH (NON-HIGHWAY) KIT The Pin-Hitch Package enables your MACKISSIC GRAVITY SELF FEEDING CHIPPER to be towed behind your lawn tractor.
Hitch Plate on Top Tow Beam/Stand Figure 45 Bolt and Locknut 4. Secure the Tow Beam/Stand to the Hitch Supports with the 3/8-16 X 3" Bolt and Locknut using two 9/16" Wrenches (Figure 45). Do not over tighten because the Tow Beam/Stand must be able to rotate between the Hitch Supports. 5. Tighten the Hardware that secures the Hitch Supports to the Base (Figure 44). 6.
Chapter 7: Parts List and Schematic Diagrams Parts List and Schematic - Chipper Basic Assembly Note: Part numbers listed are available through MacKissic, Inc.
Parts List and Schematic – Base and Wheels Assembly Note: Part numbers listed are available through MacKissic, Inc. Ref# Part# Description Ref# Part# Description 1 2 090-0066 090-0460 Bolt, HHCS, 5/16-18 x 3/4" Nut, Nylon Lock, 5/16-18 9 10 950-1095 940-1020-BL Guard, Belt, Asm Bracket, Belt Guard, Ext Mnt 3 4 940-1019-BL 940-1032-BL Bracket, Belt Guard, Int Mnt Axle 11 12 950-1106-BL 090-0461 Frame Nut, Nylon Lock, 3/8-16 5 6 940-1089-BL 030-0641 Spacer, Wheel Tire/Wheel, CPR, 4.10/3.
Parts List – Hopper Assembly Note: Part numbers listed are available through MacKissic, Inc.
Schematic – Hopper Assembly CONTACT US AT www.MacKissic.
Parts List – Drive Assembly Note: Part numbers listed are available through MacKissic, Inc. Ref# Part# 1 030-0651 2 Description Ref# Part# Description 11 030-0615 Belt, V, 5L X 44.00 090-0091 Engine, Briggs and Stratton, 1100 Series Bolt, HHCS, 5/16-18 x 1 3/4", Gr 5 12 030-0608 Pulley, 5L, 1.00 bore x 6.00 OD 3 090-0024-4 Shim 13 080-0081 Key, Shaft, 1/4" SQ x 1-1/4" 4 030-0610 Clutch 14 090-0702 Bolt, 5/16-18 x 4-1/2", Gr5 5 704-0106 Washer, 1.5 OD .390 ID .
Schematic – Drive Assembly CONTACT US AT www.MacKissic.
Parts List and Schematic – WC375 NH KIT Note: Part numbers listed are available through MacKissic, Inc.
Daily Checklist for the MACKISSIC GRAVITY SELF FEEDING CHIPPER To help maintain your MACKISSIC GRAVITY SELF FEEDING CHIPPER for optimum performance, we recommend you follow this checklist each time you use your Chipper. The flywheel will still rotate for A WHILE after the engine is shut off. Shut down the engine, wait for all moving parts to come to a complete stop, remove spark plug wire, then wait 5 minutes before moving or working on the chipper.
