Instruction & Owners Manual 6" & 8" Chipper and Hydraulic Feed Models 71620 71825 72620 72825 Crary Company Box 849 West Fargo, ND 58078 (701) 282-5520 (800) 247-7335 FAX: (701) 282-9522 Cat. No. 16681 Manual No.
Dear Bear Cat Customer, Thank you for purchasing a Crary Bear Cat Chipper. The Bear Cat Chipper is designed, tested, and manufactured to give years of dependable performance. To keep your chipper operating at peak efficiency, it is necessary to adjust it correctly and make regular inspections. The following pages will assist you in the operation and maintenance of your machine. Please read and understand this manual before operating the chipper.
Table of Contents Safety Instructions 2 Assembly 4 Controls 5 Operation 7 Chipping 9 Service and Maintenance 10 Hydraulic Feed Assembly 14 Hydraulic Feed Operation 15 Hydraulic Feed Maintenance 16 Speed Sensor Trouble Shooting Guide 17 Troubleshooting 18 Replacement & Maintenance Chart 19 Specifications 20 Warranty Torque Chart Standard tightening torque for normal assembly applications A Service Tip BOLTS (SAE GR5) MIN. TORQUE SIZE (FT. LBS.) 5/16"...................20 3/8"....
Safety Instructions for Operation This chipper is designed and tested to offer reasonably safe service. However, failure to operate it in accordance with the following safety instructions MAY RESULT IN PERSONAL INJURY! Before Operating 1. Become familiar with the owners manual before attempting to operate this equipment. 2. Do not allow children to operate this equipment. 3. Do not operate this equipment in the vicinity of bystanders. 4.
Safety Instructions Cont. 5. Do not allow hands or other part of the body or clothing inside the feeding chambers, discharge chute, or near any moving part. 6. Keep all guards and deflectors in place and in good working condition. 7. Always stand clear of the discharge area when operating this machine. 8. Keep your face and body back from the feed opening. 9. Do not over reach. Keep proper balance and footing at all times. 10. Do not transport or move machine while the machine is running. 11.
Assembly, Controls, and Engine Operation Assembly 1. Remove from shipping crate. See Figure 1 2. Support the frame on wood blocks or other support device. 3. Mount the two tires and rims to the axle assembly with the lug nuts (supplied). 4. Mount the trailer hitch assembly to the frame using three 3/8 X 3-1/2 inch bolts and locknuts (supplied). 5. Fasten the chipper chute to the main frame mounting bracket using eight 3/8 X 1 inch bolts and locknuts. Use three bolts on each side and two on the bottom. 6.
Controls: Engine 1. Engine Throttle: (Gasoline models only) changes engine speed. Turn knob clockwise for full throttle operation. Turn knob counterclockwise for idle on warm up. Turn knob fully counterclockwise to shut engine off. Refer to engine manual for further engine operating instructions. 2. Engine Choke: (Gasoline models only) use when starting cold engine. Pull to ON position when starting. Push lever to OFF position when engine is running.
Controls Cont. See Figure 4 5. Engine Fuel Tank: Use unleaded fuel—do not mix with oil. 6. Trailer Hitch: Always use 2 inch ball and safety chains. 7. Jack Stand: Always have in UP position and clear from ground when moving. When is use, place in DOWN position on a level surface. 8. Engine Drive Belts and Shield: Never remove shields when in use. 9. Chipper Chute: Feed materials to be chipped through the chute. 10. Engine Controls 11. Rotor Access Cover: Used to remove chipper blades. 12.
Engine Operation: Starting CAUTION: Move machine to a clear, level area outdoors before starting. Do not operate machine on a paved, concrete, or gravel surface. Do not operate in the vicinity of bystanders. Make sure cutting chamber is empty before starting. 1. Before starting, fill engine with oil to the correct level. See engine manual for operation and maintenance instructions. Note: Some oil usage is normal. Check level with each use. WARNING: Handle fuel (gasoline) with care. It is highly flammable.
Engine Operation: Stopping 1. Move throttle to SLOW position. 2. Depress foot clutch pedal. 3. Move throttle to STOP position (or shut off key switch) and remove spark plug wire from spark plug. 4. Allow machine to come to a complete stop. You may release the foot clutch pedal to help slow the rotor once the engine has stopped running. Note: The heavy rotor will continue to turn for some time after the engine has been shut off.
Chipping WARNING: Keep face and body away from the feed opening. Do not overreach. Keep proper balance and footing at all times. The Bear Cat chipper is designed to chip a variety of materials into a more readily decomposing or handled condition. The following guidelines can be used to help you get started. 1. Select limbs that are up to 8 inches in diameter. Trim side branches that cannot be bent enough to feed into the chipper chute.
Service and Maintenance WARNING: Before inspecting or servicing any part of the machine, shut off the power source, disconnect the spark plug wire from the spark plug, and make sure all moving parts have come to a complete stop. The chipping blades are sharp! Use care when working on machine to avoid injury. WARNING: The rotor assembly has a lock mechanism. When working on the rotor assembly, use the lock mechanism at all times. Remove plastic bearing cover under chipper chute.
Setting Chipping Blade Clearance To Adjust: The four edged chipping blades should clear the chipping anvil located directly under the chipper chute by 1/16 inch to 1/8 inch. The chipping anvil is adjustable and reversible. 1. Lift rotor access cover and expose rotor (see figure 7). Loosen the three 1/2 inch bolts that hold the chipper anvil to the frame. 2. Measure the amount of clearance between chipping blade and chipping anvil from inside of housing. 3. Adjust inward or outward to desired measurement.
Replacing Drive Belt-Hydraulic Models 1. Remove large belt guard (three 5/16" bolts). 2. Loosen bolts on hydraulic pump and remove belt. 3. Lift belt idler pulley off drive belt and remove drive belt from pulleys. 4. Install new belt on pulleys and lower belt idler. Check alignment of pulleys and adjust if needed. 5. Adjust the eyebolt that anchors the idler spring to adjust belt tension.
4. If a rotor bearing needs repair, it is best to remove the complete rotor assembly from chipper frame. 5. Using an overhead hoist or lifting device, remove the four 1/2 inch bolts on each rotor bearing and lift the rotor assembly completely out of the frame. The complete rotor assembly is 275 lbs. 6. Once the rotor assembly is out of the frame, both bearings can be removed by a puller and replaced on the shaft. 7.
Hydraulic Feed Assembly (For Units With Optional Hydraulic Feed) Fluids Handle pressurized hydraulic fluid carefully. Escaping pressurized hydraulic fluid can have sufficient force to penetrate your skin causing serious injury. This fluid may also be hot enough to burn. Serious infection or reactions can develop if proper medical treatment is not administered immediately. Premium hydraulic fluids containing high quality rust, oxidation, and foam inhibitors are required.
Hydraulic Feed Operation 1. Start the chipper engine. Bring the chipper up to operating speed. See "Controls and Operation" section for starting, operation, and stopping instructions. Please read and follow all safety instructions in this manual. Failure to operate the chipper in accordance with the safety instructions MAY RESULT IN PERSONAL INJURY! 2. Engage the hydraulic feed by moving the control arm as shown below. In the forward direction, the feed rate increases as the arm is moved. 3.
Hydraulic Feed Maintenance Maintenance Note: Check the reservoir daily for proper fluid level, the presence of water (noted by a cloudy to milky appearance, or free water in bottom of reservoir), and rancid fluid odor (excessive heat). The hydrostatic pump normally does not require regular fluid changes. The system filter should be changed at 250 hour or annual intervals.
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Troubleshooting Problem Probable Cause Suggested Remedies Reference 1.
Replacement & Maintenance Chart Note: When ordering replacement parts, be sure to identify the Model and Serial number of the machine.
Specifications Model 71620 Model 72620 Model 71825 Model 72825 Overall Size (LxWxH) 76 x 80 x 90" 93 x 80 x 90" 76 x 80 x 90" 93 x 80 x 90" Max. Chipper Cap. (dia.) 6" 6" 8" 8" Chipper Blade Qty. 4 Reversible Tool Steel 4 Reversible Tool Steel 4 Reversible Tool Steel 4 Reversible Tool Steel Rotor Speed 1500 RPM 1500 RPM 1500 RPM 1500 RPM Rotor Size 30" Dia. x 1.25" 30" Dia. x 1.25" 30" Dia. x 1.25" 30" Dia. x 1.25" Rotor Weight 275 lbs. 275 lbs. 275 lbs. 275 lbs.
Chipper and Hydraulic Feed Limited Warranty Crary Bear Cat Chipper models 71620, 71825, 72620, and 72825 are warranted for one year from date of sale. Within the above stated period, Crary Co. will replace any part(s) found to be defective in material and/or workmanship, after the receipt of the part in our plant. Labor costs to replace these defective parts will be paid at a Crary established labor rate and time allowed (flat rate) for repair.
HEALTH WARNING GASOLINE, DIESEL, AND OTHER PETROLEUM PRODUCTS Harmful or fatal if swallowed. Long-term exposure to vapors has caused cancer in laboratory animals. • Avoid prolonged breathing of vapors. • Keep face away from nozzle and gas tank/container opening. • Never siphon by mouth. Failure to use caution may cause serious injury or illness.
