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JOHN DEERE
WORLDWIDE COMMERCIAL & CONSUMER
EQUIPMENT DIVISION
Powerhead - PA01186 Powerhead - PA01187
CS71 20” - UT10919 CS81 20” - UT10923
CS71 24” - UT10920 CS81 24” - UT10924
CS71 28” - UT10921 CS81 28” - UT10925
Chain Saws
OPERATOR’ S MANUAL
OM PS04120
Revision C
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INTRODUCTION Thank You for Purchasing a John Record your Identification numbers below. Be sure you have Serial Number and Unit (UT) Number, Deere Product your dealer will need these when you order parts. We appreciate having you as a customer and wish you many years of safe and satisfied use of your machine. UT Number _________________________________ The Operator's Manual Your operator's manual is for your protection. READ IT. Keep it handy for reference. Know what you are doing Model _______
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TABLE OF CONTENTS Product Identification Chain Saw Components ............................................................................................................................... 4 Safety Understanding Safety Labels ........................................................................................................................ 5 State and Local Requirements ...................................................................................................................... 5
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PRODUCT IDENTIFICATION Chain Saw Components 1 - Throttle Trigger Lockout 12 - Rear Handle 2 - Half Throttle Lock 13 - Chain 3 - Carburetor Adjustment Screws 14 - Guide Bar 4 - Front Handle 15 - Air Filter Cover 5 - Chain Brake Lever / Hand Guard 16 - Ignition Switch 6 - Muffler 17 - Fuel Tank Cap 7 - Safe-T-Tip® 18 - Starter Handle 8 - Compression Relief Valve 19 - Oil Tank Cap 9 - Clutch Cover 20 - Combination Wrench 10 - Choke Lever 11 - Throttle Trigger 4 3 5 6 2 1 7 12 8 10 11 9 13 15 14 16
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SAFETY Understanding Safety Labels Wear eye, hearing and head protection when This symbol indicates Warning, Danger, and operating this equipment. Caution. Your manual contains special messages to bring attention to potential safety concerns, ® The SAFE-T-TIP Nose Guard on your bar machine damage as well as helpful operat- nose prevents kickback. ing and servicing information. Please read all the information carefully to avoid injury and machine damage. DANGER! Beware of Kickback. Wear non-slip
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SAFETY Precautions Against Kickback Basic Safety Precautions Kickback is a dangerous reaction that can lead to serious Push and Pull injury. Do not rely only on the safety devices provided with The reaction force is always opposite to the direction the chain your saw. As a chain saw user, you must take special safety is moving when wood contact is made. Thus, the operator must precautions to help keep your cutting jobs free from acci- be ready to control the PULL (A) when cutting on the bott
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SAFETY Safety Apparel Refueling (DO NOT SMOKE!) • Wear snug fitting clothing. Do not wear scarves, jewelry, • To reduce the risk of fire and burn injury, handle fuel with neckties, or other loose fitting clothing, which could be drawn care. It is highly flammable. into the engine or catch the chain or underbrush. Wear • Mix and store fuel in a container approved for gasoline. overalls, jeans or chaps made of cut resistant material or ones • Mix fuel outdoors where there are no sparks or flame
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SAFETY Chain Brake Understanding Your Chain Saw Safety Chain brakes are designed to rapidly stop the chain from Devices rotating. When the chain brake lever / hand guard is pushed Safe-T-Tip® Anti-Kickback Nose Guard toward the bar, the chain should stop immediately . A chain The SAFE-T-TIP® (A) prevents kickback from happening, be- brake does not prevent kickback. cause it covers the tip of the bar where kickback is generated. Inexperienced persons should never attempt any kind of cutting B) R
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ASSEMBLY Assembling the Bar and Chain 5. The guide bar contains a bar stud slot (H) that fits over the bar studs. The guide bar also contains two chain tensioning 1. Ensure that the chain brake is not set by pulling the chain pin holes (J) which fit over the chain tensioning pin and brake lever / hand guard towards the front handle as shown two lubrication holes (K). The bar is reversible and either in Illustration (A). Refer to Safety-Chain Brake and Opera- tensioning pin hole may be utilized
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ASSEMBLY 9. Replace the clutch cover (C) and install the two (2) bar nuts (B). Tighten the bar nuts finger tight only, see Illustration (R). The bar must be free to move for tension adjustment. NOTE: If the clutch cover does not slide on freely, check - + that the chain brake is not engaged. To disengage chain brake with clutch cover removed, grasp clutch cover as shown in Illustration (S) and pull back on chain brake G lever / hand guard. 10. Remove all slack from chain by turning the chain t
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OPERATION Chain Tension Breaking-in the Chain New chains will stretch and must be tightened frequently. Lift the chain out of the bar groove and lubricate the bar groove with WARNING additional oil, see Illustration (E). Place the chain saw on a piece Never touch or adjust the chain while the motor is running. of cardboard or scrap plywood. Start the chain saw (refer to the The saw chain is very sharp, always wear protective Operation-Starting Engine Section) and allow it to run at moder- gl
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OPERATION Fueling 3. Carefully pour fuel mixture into the tank. Avoid spillage. 4. Prior to replacing the fuel cap, clean and inspect the gasket. This product is powered by a 2-cycle engine and requires pre- mixing gasoline and 2-cycle oil. Pre-mix unleaded gasoline and 5. Immediately replace fuel cap and hand tighten. Wipe up any 2-cycle engine oil in a clean container approved for gasoline. fuel spillage. RECOMMENDED FUEL: THIS ENGINE IS CERTIFIED TO OP- 6. It is normal for smoke to be emi
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OPERATION Starting the Engine E WARNING C Keep body to the left of the chain line. Never straddle the D saw or chain, or lean over past the chain line. H Run • Place the chain saw on level ground and ensure that no objects F or obstructions are in immediate vicinity which could come in contact with the bar and chain. Hold the front handle firmly with Full the left hand and put your right foot onto the base of the rear G Choke handle, see illustration (A). • Set the chain brake by pushing the
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OPERATION Chain Brake Operation Carburetor Adjustment - Cont'd This engine is designed and manufactured in order to comply Refer to Safety-Chain Brake Section before use. with EPA (Environmental Protection Agency) Phase 1 regula- The chain brake Run Position (A) and Brake Position (B) are tions. The carburetor is factory set and should not require illustrated below. adjusting. The carburetor will permit only limited adjustment of The chain brake operating condition should be checked prior to th
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OPERATION Preparation for Cutting Basic Cutting Procedure Practice cutting a few small logs using the following technique Proper Grip on Handles to get the "feel" of using your saw before you begin a major Refer to Safety Section for appropriate Safety Equipment. sawing operation. 1. Wear non-slip gloves for maximum grip and protection. 1. Take the proper stance in front of the wood with the saw idling. 2. Maintain a proper grip (A) on the saw whenever the engine is 2. Accelerate the engine to f
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OPERATION Tree Felling 3. Cut a notch (C) about 1/3 the diameter of the trunk in the side of the tree. Make the cuts of the notch so they intersect at a Unusual Hazardous Tree Felling Conditions right angle to the line of fall. This notch should be cleaned out • Do not fell trees during periods of high wind or heavy precipi- to leave a straight line. To keep the weight of the wood off the tation. Wait to do your cutting until the hazard has ended. saw, always make the lower cut of the notch b
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OPERATION Buttress Roots Bucking with a Wedge A buttress root is a large root extending from the trunk of the tree If the wood diameter is large enough for you to insert a soft above ground. Large buttress roots should be removed prior to bucking wedge (E) without touching the chain, you should use the felling. Make the vertical cut (A) into the buttress first, followed wedge to hold the cut open to prevent pinching. by the horizontal cut (B). Remove the resulting loose section (C) from the w
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OPERATION Types of Cutting Used • When pruning trees it is important not to make the flush cut next to the main limb or trunk until you have cut off the limb Overbucking further out to reduce the weight. This prevents stripping the Begin on the top side of the log with the bottom of the saw against bark from the main member. Underbuck the branch 1/3 the log; exert light pressure downward. through for your first cut, your second cut should overbuck to drop the branch off. Now make your finishing
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MAINTENANCE Maintenance Chart English 19
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MAINTENANCE Chain Maintenance 1. Tighten the chain tension enough that the chain does not wobble. Do all of your filing at the mid-point of the bar. Wear Use only Dual Raker low-kickback chain on this saw. This fast- gloves for protection. cutting chain will provide kickback reduction when properly 2. Use a 7/32" diameter round file and holder. maintained. 3. Keep the file level with the top plate of the tooth as shown in For smooth and fast cutting, Raker chain needs to be main- Illustratio
