Form No. 3390-434 Rev A TRX-16, TRX-20, and TRX-26 Trencher Model No. Model No. Model No. Model No. Model No. Register at www.Toro.com. Original Instructions (EN) 22972—Serial No. 315000001 and Up 22972G—Serial No. 315000001 and Up 22973—Serial No. 315000001 and Up 22973G—Serial No. 315000001 and Up 22974—Serial No.
Introduction This machine is designed to dig trenches in soil to bury cabling and piping for various applications. It is not intended to cut rock, wood, or any other material other than soil. Read this information carefully to learn how to operate and maintain your product properly and to avoid injury and product damage. You are responsible for operating the product properly and safely.
Contents Adjusting the Traction Control Alignment .................36 Adjusting the Traction Control Neutral Position .............................................................37 Adjusting the Tracking of the Traction Control, Full Forward Position ..........................................37 Hydraulic System Maintenance ....................................38 Replacing the Hydraulic Filter ..................................38 Changing the Hydraulic Fluid...................................
Safety • Improper use or maintenance by the operator or owner can result in injury. To reduce the potential for injury, comply with these safety instructions and always pay attention to the safety alert symbol , which means: Caution, Warning, or Danger—personal safety instruction. Failure to comply with the instruction may result in personal injury or death. Operation • Never run an engine in an enclosed area.
Maintenance and Storage • Ensure that you operate the machine in areas where • • • there are no obstacles in close proximity to the operator. Failure to maintain adequate distance from trees, walls, and other barriers may result in injury as the machine backs up during operation if the operator is not attentive to the surroundings. Only operate the unit in areas where there is sufficient clearance for the operator to safely maneuver the product.
Sound power level was determined according to the procedures outlined in EN ISO 3744. – Charge batteries in an open, well ventilated area, away from spark and flames. Unplug the charger before connecting or disconnecting it from the battery. Wear protective clothing and use insulated tools. Model 22974 – Battery acid is poisonous and can cause burns. Avoid contact with skin, eyes, and clothing. Protect your face, eyes, and clothing when working with a battery.
Slope Indicator G011841 Figure 3 This page may be copied for personal use. 1. To determine the maximum slope you can safely operate the machine on, refer to the Slope Operation section. Use the slope indicator to determine the degree of slope of hills before operating. Do not operate this machine on a slope greater than that specified in the Slope Operation section. Fold along the appropriate line to match the recommended slope. 2.
Safety and Instructional Decals Safety decals and instructions are easily visible to the operator and are located near any area of potential danger. Replace any decal that is damaged or lost. 115-1230 1. Warning—do not operate this machine unless you are trained. 2. Engine—stop 3. Engine—run 4. 5. 6. 7. 8. 9. 10. 11. 12. Trencher chain—reverse Trencher chain—forward Trencher chain—off Engine throttle Fast Slow Choke On/Closed Off/Open 13.
115-1231 6. Explosion hazard; shock hazard—do not use machine near 1. Cutting/dismemberment hazard of bystanders, buried utility lines; contact the proper agencies before digging. trencher—keep bystanders a safe distance from the machine; do not operate the trencher chain while transporting the machine. 7. Boom elevation 2. Explosion hazard, fueling—stop the engine and extinguish all flames when fueling. 3. Tipping/crushing hazard—lower the trencher head when operating on slopes. 8. Lower the boom 4.
115-4020 1. Turn right 3. Reverse 2. Forward 4. Turn left 93-7814 1. Entanglement hazard, belt—stay away from moving parts. 100-4650 1. Crushing hazard of hand—keep bystanders a safe distance from the machine. 2. Crushing hazard of foot—keep bystanders a safe distance from the machine. 93-6686 1. Hydraulic oil 2. Read the Operator's Manual. 107-8495 1. Parking brake 93-9084 1. Lift point 2.
Battery Symbols Some or all of these symbols are on your battery 1. Explosion hazard 6. Keep bystanders a safe distance from the battery. 2. No fire, open flame, or smoking. 7. Wear eye protection; explosive gases can cause blindness and other injuries 3. Caustic liquid/chemical burn hazard 4. Wear eye protection 8. Battery acid can cause blindness or severe burns. 9. Flush eyes immediately with water and get medical help fast. 5. Read the Operator's Manual. 10. Contains lead; do not discard.
Setup Loose Parts Use the chart below to verify that all parts have been shipped. Procedure 1 2 3 Description Use Qty. Boom (sold separately) Chain (sold separately) 1 1 Install the boom and chain. No parts required – Check the fluid levels. No parts required – Charge the battery. 1 Installing the Boom and Chain Parts needed for this procedure: 1 Boom (sold separately) 1 Chain (sold separately) Procedure Figure 4 Important: There are several boom and chain size configurations available.
Product Overview 9. Loop the digging chain over the auger drive shaft and onto the drive sprocket, ensuring that the digging teeth point forward on the upper span. 10. Set the upper span of the chain into place on the trencher boom, then wrap the chain around the roller at the end of the boom. 11. Thread the adjustment bolt into the boom and turn it in until there is 3.8 to 6.3 cm (1-1/2 to 2-1/2 inches) of slack in the chain on the bottom span. 12.
Key Switch, Electric Start Models The key switch has three positions: Off, Run, and Start. To start the engine, rotate the key to the Start position. Release the key when engine starts and it will move automatically to the Run position. To stop the engine, rotate the key to the Off position. Figure 8 Throttle Lever Move the control forward to increase the engine speed and rearward to decrease speed. • To move rearward, move the traction control rearward (Figure 9).
Boom Elevation Lever Trencher Control Lever To lower the boom, slowly move the lever forward (Figure 12). To dig with the trencher, rotate the lever rearward and pull it down to the reference bar (Figure 14, number 1). To raise the boom, slowly move the lever rearward (Figure 12). To reverse the trencher head, rotate the lever rearward, then move it left into the upper slot (Figure 14, number 2).
Specifications Operation Note: Specifications and design are subject to change without notice. Width Length, with 70 cm (24 inch) boom Length, with 91.4 cm (36 inch) boom Length, with 122 cm (48 inch) boom (model 22974 only) Note: Determine the left and right sides of the machine from the normal operating position. 86 cm (33.8 inches) Important: Before operating, check the fuel and oil level, and remove debris from the machine. Also, ensure that the area is clear of people and debris.
7. If the oil is below the Add mark, add 10w30 engine oil to the filler hole, checking the level frequently with the dipstick, until the oil level reaches the Full mark. DANGER In certain conditions during fueling, static electricity can be released causing a spark which can ignite the gasoline vapors. A fire or explosion from gasoline can burn you and others and can damage property. • Always place gasoline containers on the ground away from your vehicle before filling.
Figure 18 1. Filler neck cap 2. Hydraulic fluid filter 6. If the level is low, add fluid until it is visible in the glass bubble. 7. Install the cap and filter on the filler neck and torque bolt on top to 13 to 15.5 N-m (110 to 140 inch-lb).
Stopping the Engine Starting and Stopping the Engine 1. Move the throttle lever to the Slow position (Figure 19). 2. Lower the boom (Figure 20). Starting the Engine 1. Move the throttle lever midway between Slow and Fast positions (Figure 19). 1 2 3 G007809 Figure 19 1. Throttle lever Figure 20 3. Key 2. Choke lever 3. Turn the key off (Figure 19). 2. Move the choke lever to the On position (Figure 19).
3. Secure the machine to the trailer with chains or straps using the tie-down/lift loops at the front and rear of the machine (Figure 22 and Figure 23). Refer to your local ordinances for trailer and tie-down requirements. 1 G007816 Figure 21 1. Tow valves Figure 22 4. Install the bottom shield and tow the machine as required. 1. Front tie-down loop 5. When the machine has been repaired, close the tow valves before operating it. Digging a Trench 1.
Operating Tips Soil Type Recommended Chain Type • Clean the area of trash, branches and rocks before Sandy Soil chain (re-configure with extra teeth for added digging speed; refer to your Authorized Service Dealer) Sandy Loam/Loam/Loamy Clay Wet, sticky clay Soil chain trenching to prevent equipment damage. • Always begin trenching with the slowest ground speed possible. Increase speed if conditions permit.
Maintenance Note: Determine the left and right sides of the machine from the normal operating position. Recommended Maintenance Schedule(s) Maintenance Service Interval Maintenance Procedure After the first 8 hours • Change the engine oil. After the first 50 hours • Check and adjust the track tension. Before each use or daily • • • • • • • Check the engine-oil level. Grease the machine. (Grease immediately after every washing.) Check the engine oil level.
Premaintenance Procedures Installing the Cover Plate 1. Lower the boom, stop the engine, and remove the key. 2. Slide the cover plate into place and secure it with the 3 bolts you loosened previously (Figure 25). Before opening any of the covers, stop the engine, remove the key, and allow the engine to cool. Removing the Bottom Shield Important: The fasteners on the covers of this machine are designed to remain on the cover after removal .
Lubrication Greasing the Machine Service Interval: Before each use or daily (Grease immediately after every washing.) Grease Type: General-purpose grease. 1. Lower the boom and stop the engine. Remove the key. 2. Clean the grease fittings with a rag. Figure 29 3. Connect a grease gun to each fitting (Figure 27 through Figure 30). 4. Pump grease into the fittings until grease begins to ooze out of the bearings (approximately 3 pumps). 5. Wipe up any excess grease.
3. Pump grease into the fitting until grease comes out of the grease valve located next to the fitting. Engine Maintenance 4. Wipe up any excess grease. Servicing the Air Cleaner (Models 22972 and 22973) Service Interval: Every 25 hours—Clean the foam air cleaner element. Every 50 hours—Check the paper air cleaner element. Every 200 hours/Yearly (whichever comes first)—Replace the paper air cleaner element. Inspect the foam and paper elements and replace them if they are damaged or excessively dirty.
Cleaning the Foam Air Cleaner Element 1 1. Wash the foam element in liquid soap and warm water. When the element is clean, rinse it thoroughly. 2 3 4 2. Dry the element by squeezing it in a clean cloth. Important: Replace the foam element if it is torn or worn. Servicing the Paper Air Cleaner Element 5 1. Clean the paper element by tapping gently to remove dust. If it is very dirty, replace the paper element with a new one (Figure 32). G011475 Figure 33 2.
Servicing the Engine Oil 5. Unscrew the oil dipstick and wipe the end clean (Figure 35). Service Interval: After the first 8 hours—Change the engine oil. 6. Slide the oil dipstick fully into the filler tube, but do not thread onto tube (Figure 35). Before each use or daily—Check the engine oil level. 7. Pull the dipstick out and look at the end. If the oil level is low, slowly pour only enough oil into the filler tube to raise the level to the Full mark. Every 100 hours—Change the engine oil.
2. Remove the old filter (Figure 37). 1 Figure 37 1. Oil filter Figure 38 2. Adapter 1. Spark-plug wire/spark plug 3. Apply a thin coat of new oil to the rubber gasket on the replacement filter (Figure 37). 4. Clean around the spark plug to prevent dirt from falling into the engine and potentially causing damage. 4.
Installing the Spark Plug Fuel System Maintenance 1. Install the spark plug and the metal washer. Ensure that the air gap is set correctly. 2. Tighten the spark plug to 22 N-m (16 ft-lb). Draining the Fuel Tank 3. Connect the wire to the spark plug (Figure 39). DANGER In certain conditions, gasoline is extremely flammable and highly explosive. A fire or explosion from gasoline can burn you and others and can damage property. • Drain gasoline from the fuel tank when the engine is cold.
Electrical System Maintenance 9. Wipe up any spilled fuel. Replacing the Fuel Filter Service Interval: Every 200 hours Servicing the Battery (Models 22973 and 22974) Never install a dirty filter if it is removed from the fuel line. Note: Note how the fuel filter is installed in order to install the new filter correctly. Service Interval: Every 25 hours—Check the battery electrolyte level. Note: Wipe up any spilled fuel. Always keep the battery clean and fully charged.
5. Remove the hold down plate, j-bolts, and locknuts securing the battery (Figure 42) and remove the battery. WARNING Incorrect battery cable routing could damage the machine and cables causing sparks. Sparks can cause the battery gasses to explode, resulting in personal injury. Installing the Battery 1. Place the battery onto the machine (Figure 42). 2. Secure the battery with the hold down plate, j-bolts, and locknuts.
1. Remove the battery from the machine; refer to Removing the Battery (page 30). Important: Never fill the battery with distilled water while the battery is installed in the machine. Electrolyte could be spilled on other parts and cause corrosion. 2. Clean the top of the battery with a paper towel. 3. Remove the vent caps from the battery (Figure 43). 4. Slowly pour distilled water into each battery cell until the electrolyte level is up to the upper line (Figure 43) on the battery case.
Drive System Maintenance Servicing the Tracks Cleaning the Tracks Service Interval: Before each use or daily Check the tracks for excessive wear and clean them periodically. If the tracks are worn, replace them. Figure 47 1. Lower the boom and set the parking brake. 2. Stop the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. 1. Stop the machine in on a level surface and set the parking brake. 2.
9. Beginning at the drive sprocket, coil the new track around the sprocket, ensuring that the lugs on the track fit between the spacers on the sprocket (Figure 49). 3. Lift/support the side of the unit to be worked on so that the track is 7.6 to 10 cm (3 to 4 inches) off of the ground. 10. Push the track under and between the rear and center road wheels (Figure 49). 4. Back out the tensioning bolt and jam nut (Figure 48). 5. Loosen the clamp bolts (Figure 48). 11.
Belt Maintenance 4. Ensure that the road wheel turns smoothly on the bearing. If it is frozen, contact your Authorized Service Dealer to replace the road wheel. Replacing the Pump Drive Belt 5. Place the greased road wheel cap over the bolt head (Figure 51). If the pump drive belt begins to squeal or is cracked, worn, or frayed, replace it. Contact you Authorized Service Dealer for a replacement belt. 6. Secure the road wheel cap with the snap ring (Figure 51). 7.
Controls System Maintenance 5. Adjust the traction control so that it rests flush against the reference bar when it is pulled straight back (Figure 54 and Figure 55). The factory adjusts the controls before shipping the machine. However, after many hours of use, you may need to adjust the traction control alignment, the Neutral position of the traction control, and the tracking of the traction control in the full forward position.
4. If the machine veers to the right, loosen the left jam nut and adjust the tracking set screw on the front of the traction control (Figure 57). WARNING When the machine is running, you could be caught and injured in moving parts or burned on hot surfaces. Stay away from pinch points, moving parts, and hot surfaces when adjusting the running machine. F. Have a helper hold the traction control tight to the reference bar in reverse. G.
Hydraulic System Maintenance Fluid (UTHF), but they must be only conventional, petrolium-based products. The specifications must fall within the listed range for all of the following material properties and the fluid should meet the listed industry standards. Check with your oil supplier to determine if the oil meets these specifications.
Checking the Hydraulic Lines Service Interval: Every 100 hours—Check the hydraulic lines for leaks, loose fittings, kinked lines, loose mounting supports, wear, weather, and chemical deterioration and repair if necessary. Every 1,500 hours/Every 2 years (whichever comes first)—Replace all moving hydraulic hoses. WARNING Hydraulic fluid escaping under pressure can penetrate skin and cause injury.
Trencher Maintenance Replacing the Digging Teeth Service Interval: Before each use or daily—Check the condition of the digging teeth and replace any that are worn or damaged. B. Loosen the jam nut on the adjusting bolt in the boom. C. Loosen the adjusting bolt until you can remove the chain from the boom D. Remove the chain from the drive sprocket. E. If the chain needs replacing, remove the bolt and nut securing the spoils auger and remove the auger and chain.
17. Thread the jam nut down the adjusting bolt and tighten it securely against the boom. 18. Torque the 2 bolts and nuts securing the boom to 183 to 223 N-m (135 to 165 ft-lb). 19. Install the spoils auger using the bolt and nut you removed previously. Note: Torque the bolt and nut to 102 N-m (75 ft-lb). Figure 61 1. Spoils auger 2. Bolts 3. Drive sprocket 4. Sprocket mounting surface 4. Loosen the 2 bolts and nuts securing the boom to the trencher arm. 5.
Cleaning Storage 1. Lower the boom and set the parking brake. 2. Stop the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. 3. Remove dirt and grime from the external parts of the entire machine, especially the engine. Clean dirt and chaff from the outside of the engine cylinder head fins and blower housing.
12. Charge the battery (model 22973 and 22974); refer to Servicing the Battery (Models 22973 and 22974) (page 30). 13. Check and adjust the track tension; refer to Checking and Adjusting the Track Tension (page 33). 14. Check and adjust the digging chain tension; refer to Checking and Adjusting the Digging Chain and Boom (page 40). 15. Check and tighten all bolts, nuts, and screws. Repair or replace any part that is damaged. 16. Paint all scratched or bare metal surfaces.
Troubleshooting Problem The starter does not crank (models 22973 and 22974). The engine will not start, starts hard, or fails to keep running. Engine loses power. Possible Cause Corrective Action 1. The battery is discharged. 1. Charge the battery or replace it. 2. The electrical connections are corroded or loose. 3. The relay or switch is damaged. 2. Check the electrical connections for good contact. 3. Contact your Authorized Service Dealer. 1. The fuel tank is empty. 1.
Problem The trencher does not dig fast enough. Possible Cause Corrective Action 1. The digging teeth are worn. 1. Replace the digging teeth. 2. The chain you are using is not appropriate for the type of ground. 3. The hydraulic system is overheated. 2. Evaluate the ground type and change chains if necessary. 3. Shutdown and allow the system to cool. 4. Contact your Authorized Service Dealer. 4. The hydraulic system is obstructed, contaminated, or damaged.
Schematics Electrical Schematic—Model 22972 (Rev.
Electrical Schematic—Model 22973 (Rev.
Electrical Schematic—Model 22974 (Rev.
Hydraulic Schematic (Rev.
Notes: 50
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Toro Compact Utility Equipment Warranty Compact Utility Equipment (CUE) Products A One-Year Limited Warranty Conditions and Products Covered Items and Conditions Not Covered The Toro Company and its affiliate, Toro Warranty Company, pursuant to an agreement between them, jointly warrant your Toro Compact Utility Equipment (“Product”) to be free from defects in materials or workmanship.
