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Maintenance and Repair

 

 

22 

 

3. Belt and Sheave Care  

Proper belt tension and sheave alignment is vital to chipper performance.  Here are a few problems 
that can occur when belts and sheaves are not properly maintained or cared for.

 

 

Loose Belt:  A loose belt will slip and then glaze over.  Once this happens the belt will not transmit 
power to the flywheel which can cause the chipper to clog and also cause excess sheave wear. 

 

 
 
 
 
 
 
 
 
 

Misaligned Sheaves:  When sheaves are not aligned properly the belts will glaze very quickly and 
slipping will occur.  This will also cause the belt to bounce or vibrate causing metal stress on the 
machine.  

 

 
 
 
 
 
 
 
 
 
 

 

 
 
 
 
 
 
 
 
 
 
 
 
 

 

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Chipper Body 

Summary of Contents for 296025

Page 1: ...An unlocked PTO shaft can whip or become dangerously airborne Keep hands and feet away from inlet and discharge openings Do not allow children under the age of 18 or untrained adults to operate Wear...

Page 2: ...Hazard Signal Word Definitions 2...

Page 3: ...edures 13 2 Starting Stopping 14 3 Feeding Material Clearing Jam 15 4 Storing the Chipper 16 Part III Maintenance and Repair Maintenance To be done by owner or Rental Dealer 17 1 Chipping Knife 19 2 B...

Page 4: ...designed to only chip wood A chipper knife is mounted on a revolving flywheel and converts branches fed into the chipper hopper into chips Make sure you completely read and understand this manual bef...

Page 5: ...Reading and understanding these labels below will expedite your safe use of the product The labels on the machine will then serve to further remind you of important safety and operation procedures WAR...

Page 6: ...ard Danger 2 3 General Precautions and Operation 2 796192 1 Flying Debris Warning 2 4 Amputation Hazard Discharge Chute 1 5 Belt Entanglement Warning 1 6 Amputation Hazard Guard 2 7 PTO Hazard Danger...

Page 7: ...manual for a diagram of the chipper and all its components If you have missing components contact your retail or rental company or NorTrac Customer Service at 1 800 521 0438 Fastener Bag Contents 5 16...

Page 8: ...top and shields to left and right hopper sides using 8 5 16 x 0 625 bolts and 8 5 16 nyloc nuts Make sure hopper top flanges are in the inside 4 Torque to 11 ft lbs 5 Attach Hopper to Chipper Note Tw...

Page 9: ...ctor s 3 pt hitch and PTO shaft Ensuring a correct hook up to your tractor is your responsibility 2 Tractor turned off parking brake engaged Turn off the tractor and engage the parking brake before at...

Page 10: ...direct line in all directions as possible The angle should never exceed 25 in any direction Note Proper alignment will increase the life of the power takeoff shaft reduce wear on the bearings of the P...

Page 11: ...elds are in place at both ends of the driveline shaft On the tractor where the driveline connects to the PTO stub On the chipper where the driveline connects to the input shaft 3 Secure PTO safety cha...

Page 12: ...less of the amount of front end counterweight added Drivers should take extra caution when driving with the chipper attached Reduce your speed and take extra caution during turns or while driving on r...

Page 13: ...fety glasses with side shields and a hard hat Use of earplugs or another hearing protection device if working within 15 20 feet of the running chipper for longer than a few minutes Hearing can be dama...

Page 14: ...brake is not engaged the tractor could roll while you are operating the chipper Personal injury could result 2 Lower chipper to level ground The driveline angle should never exceed 25 Warm Up Checks S...

Page 15: ...hen feeding them through the machine Do not force material into the chipper If the machine does not chip well the chipper knife may need to be sharpened or replaced or the belts may need to be replace...

Page 16: ...y have become loose Choose a storage location Store the chipper in a location that is Clean and dry Away from extreme high or low temperatures Covered for extra protection 1 Remove belt guard discharg...

Page 17: ...521 0438 Replacement parts If a part needs replacement only use factory approved repair parts Replacement parts that do not meet specifications may result in a safety hazard or poor operation of the c...

Page 18: ...grease will damage bearing seals Use EP 2 lithium base grease for bearings To access belt guard side main bearing s grease zerk remove grease patch plate attached to top of belt guard Main bearings Dr...

Page 19: ...l the first day or last for months The life span depends on the amount of dirt and rocks that enter the chipper Sometimes trees will have nails or wire embedded into the surface The knife should be ch...

Page 20: ...2 To remove knife hold bolt heads stationary with 3 8 hex wrench and loosen nuts with a ratchet and deep socket 3 Clean knife and knife pocket on flywheel 4 Sharpen turn or if it has nicks or damage r...

Page 21: ...o access the bed knife See assembly instructions on page 8 for more information To adjust the bed knife Loosen bed knife using a socket wrench enough so it will move but still have a slight resistance...

Page 22: ...for Loose Belt A loose belt will slip and then glaze over Once this happens the belt will not transmit power to the flywheel which can cause the chipper to clog and also cause excess sheave wear Misa...

Page 23: ...ectly with belt belt rides on center of pulley b Bolts and nuts that hold eyebolt to frame idler to arm arm to frame all need to be tight 5 Check for proper belt tension using a belt tension gauge a I...

Page 24: ...en slide them on the shafts and install the key Be sure to consider belt guard and cover clearance Slide the sheaves on and off the drive shaft and flywheel shaft as needed to make sure they are in li...

Page 25: ...e 10 hours 40 hours Bearings Shaft Grease X Belt Tension X Bolts Tightness X Knife Condition X Warning Decals Legible X Bearing Set Screws X IMPORTANT If a part needs replacement only use parts that m...

Page 26: ...bearing 5 35 5 16 18 NC Bed knife 4 5 17 3 8 16 NC Discharge chute 5 31 5 16 18 NC Belt Drive shaft guards 5 17 M14 2 0 Flywheel shaft bearing 8 8 50 1 4 20 NC Patch plates 5 7 3 8 16 NC Cutter housi...

Page 27: ...ides Size 24 x 22 Feed Opening 5 1 2 x 8 3 4 Capacity 5 1 2 diameter FLYWHEEL Size 3 4 thick x 20 diameter Knife 1 2 1 4 x 6 1 2 x 3 8 thick reversible cutting edge Bed knife 2 x 5 1 2 x 1 4 thick Sha...

Page 28: ...Manual storage Bed knife Lower 3 point hitch stud lynch pin Knife Flywheel Infeed side access plate Belt guard Driveshaft pulley Hopper Leg Safety shield Flywheel bearing Belt guard side access plate...

Page 29: ...belt Leg Provides solid stance and sets the correct height for chipping operation PTO driveline Connects to tractor s PTO shaft Requires a 1 3 8 six tooth spline on tractor Belt guard Prevents access...

Page 30: ...296025 Parts Explosion Rev D 30...

Page 31: ...7 16 14 x 1 1 4 BHCS 4 22 786556 1 2 bolt flange bearing 2 23 82430 7 16 14 flange lock nut 4 24 785966 Frame 1 25 N A 3 8 16 x 1 HHCS 10 26 786630 Leg 2 27 39159 Lynch pin 3 28 2501930 Draw pin cat...

Page 32: ...95987 3 8 16 hex nut 4 64 N A 1 4 20 x 1 2 HHCS 8 56 3 8 split lock washer 4 65 82084 1 4 split lock washer 8 57 Knife 1 66 786305 Access plate 2 58 3 8 16 x 1 1 2 FHCS 4 67 785979 Infeed side plate c...

Page 33: ...he chipper Adults only Only trained adults should operate and service the chipper Do not let children operate Under the influence Never operate or let anyone else operate the chipper while under the i...

Page 34: ...ing into the chipper Do not use the machine while barefoot or wearing open sandals Safety During Use Safety equipment controls Always operate the chipper with all safety covers guards and barriers in...

Page 35: ...g Safety After use Prevent accidental starting When chipper is not in use remove drive shaft in order to ensure that chipper cannot be started in a storage location or by untrained persons Safety Insp...

Page 36: ...is warranty covers parts only It will not provide for replacement of complete products due to defective parts Components not manufactured by NorTrac are guaranteed by their manufacturer and can be ser...

Page 37: ...37 This page has intentionally been left blank...

Page 38: ...38 Manufactured by Northern Tool Equipment Co Inc 2800 Southcross Drive West P O Box 1499 Burnsville MN 55337 0499 Made in the USA...

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