Form No. 3397-318 Rev A Center Trencher RT1200 Traction Unit Model No. 25453—Serial No. 314000001 and Up Model No. 25453E—Serial No. 314000001 and Up Register at www.Toro.com.
WARNING CALIFORNIA Proposition 65 Warning This product contains a chemical or chemicals known to the State of California to cause cancer, birth defects, or reproductive harm. Introduction This attachment 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.
Contents Safety Safety ........................................................................... 3 Safety and Instructional Decals ................................. 4 Setup ............................................................................ 5 1 Preparing to Install the Trencher ............................. 6 2 Installing the Speed-Shift Switch ............................. 6 3 Installing the Trencher Attachment.......................... 8 4 Preparing the Hydraulic Motor........................
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. 125–6694 1. Tie-down point 125-6693 1. Trencher oil 3. Lubricate the auger every 10 to 50 operating hours. 2. Gear-box oil 4. Read the Operator’s Manual for maintenance information. 125-6671 1. Explosion hazard; electric shock hazard—call local utilities before digging. 125–6670 1.
Setup Loose Parts Use the chart below to verify that all parts have been shipped. Procedure 1 2 Description Use Qty. No parts required – Prepare to install the trencher. Speed-shift switch 1 Install the speed-shift switch.
Procedure 12 13 14 Description Use Qty. Boom Hex-head bolt (3/4 x 2-1/2 inch) Washer (3/4 inch) Locknut (3/4 inch) Hex-head bolt (1 x 2-1/2 inch) Washer (1 inch) Locknut (1 inch) Shim Digging chain Master pin Safety pin 1 4 4 4 2 4 2 3 1 1 1 Restraint bar 1 1 Install the boom. Install the digging chain. Install the restraint bar. 2 Preparing to Install the Trencher Installing the Speed-Shift Switch No Parts Required Parts needed for this procedure: 1 Procedure 1.
5. Align the large notch in the body of the speed-shift switch so that the notch is toward the front of the machine, and snap the switch into the auxiliary-control panel (Figure 5). Routing the Speed-Switch Harness 1. Locate the harness with the 2-socket connector for the speed-shift solenoid on the hydraulic motor in the lower left corner of the bulkhead interior (Figure 6). Figure 4 1. Switch opening (auxiliary-control panel) 3. 10-socket connector 2. Blanking plate 4. Left 3.
3 Installing the Trencher Attachment Parts needed for this procedure: 1 Trencher attachment 5 Bolt (1 x 5-1/2 inch) 7 Flat washer (1 inch) 6 Locknut (1 inch) Procedure Figure 8 1. Raise the attachment off the floor as shown in Figure 7. 1. Mounting plate Important: Ensure that the lifting equipment has a lifting capacity of at least 405 kg (893 lb). 3. Holes (rows 2 and 4 for machines with wheels) 2.
Figure 9 1. Locknut (1 inch) 4. Washer 2. Upper-nut retainer (machines with a track drive) 5. Bolt (1 x 5-1/2 inch) Figure 10 3. Lower-nut retainer (machines with wheels) 4. Slip a washer onto a bolt (1 x 5-1/2 inch) and partially thread the bolt into the nut that you installed in step 3; refer to Figure 9. 1. Locknut (1 inch) 4. Hole (row 2 for machines with wheels) 2. Washer 3. Hole (row 1 for machines with a track drive) 5. Washer 6. Bolt (1 x 5-1/2 inch) 6.
Figure 14 1. Locknut (1 inch) Figure 12 1. Upper slots 3. Washer 2. Hole (trencher attachment) 4. Bolt (1 x 5-1/2 inch) 3. Lower holes 2. Mounting plate 13. At the forward side of the mounting plate for the machine, thread a locknut onto the lower, center bolt (Figure 14). 10. Lower the trencher attachment until it is aligned with the mounting plate and the bolts fit in the upper slots. 14. Torque the bolts and the locknuts to 1341 to 1368 N-m (989 to 1009 ft-lb).
4 Preparing the Hydraulic Motor Parts needed for this procedure: 1 45° elbow fitting (3/4 inch) 2 90° flanged-elbow fitting (1 inch) 2 O-ring 4 Flange clamp 8 Hex-head bolt (12 x 45 mm) 8 Lock washer (12mm) Figure 16 1. 45° elbow fitting (3/4 inch) 3. Port L1 2. Jam nut Procedure 3. Place the O-rings into the grooves in the flanges of the 90° flanged-elbow fittings. 1. Remove and discard the plugs from the ports A, B, and L1 of the hydraulic motor as shown in Figure 15. 4.
5 Connecting the Lift Cylinder Hoses Parts needed for this procedure: 2 45° elbow fitting (3/8 inch) Procedure 1. Remove the 2 caps (3/8 inch) from the bulkhead fittings for the extend and retract circuits for the lift cylinder (Figure 19). Figure 18 1. Hex-head bolt (12 x 45 mm) 4. 90° flanged-elbow fitting 2. Lock washer (12 mm) 5. O-ring 3. Flange clamp (2) 6. Port A 7.
6 Installing the Hydraulic Hoses Parts needed for this procedure: 1 Hose (34-1/2 inch) 1 Hose (40-1/2 inch) 1 Hose (47 inch) 1 Cable tie Figure 21 Procedure 1. Remove the 2 caps (1 inch) and the 1 cap (5/8 inch) from the bulkhead fittings in the hydraulic-attachment panel (Figure 20). 1. Bulkhead fitting (pressure-hydraulic circuit—A) 5. Case-drain hose (119 cm or 47 inch) 2. Bulkhead fitting (case drain) 6. Return hose (103 cm or 40-1/2 inch) 3.
Component Torque value (N-m) Torque value (lb-ft) 8 hex-head bolts (12 x 45 mm) 80 to 100 59 to 73 Jam nut for the 45° elbow fitting (3/4 inch) 142 to 175 105 to 129 Figure 16 Case drain hose 119 cm (47 inch) 58 to 72 43 to 53 Figure 21 and Figure 22 Pressure hose 88 cm (34-1/2 inch) and return hose 103 cm (40-1/2 inch) 122 to 149 90 to 110 Figure 21 and Figure 22 2.
side of the operator seat), and operate the hydraulic motor forward and backward several times to bleed the air from the motor (Figure 24). 8 Note: Move joystick in both directions until the hub moves smoothly in both directions. Have another person observe the hub and the boom-mount fitting as they move. Purging Air from the Hydraulic Motor and Lift Cylinder 4. While 1 person is watching the 2-piece drive sprocket that you installed, press the speed-shift switch to the 2 positions.
9 10 Installing the Sprocket Installing the Auger Parts needed for this procedure: Parts needed for this procedure: 2 Sprocket segment 1 Left auger 8 Bolt (9/16 x 2-3/4 inch) 1 Right auger 8 Locknut (9/16 inch) 1 Auger shaft 1 Auger sprocket 2 Bearing 1 Key (1/2 x 5 inch) 2 Hex-head bolt (3/4 x 4 inch) 2 Locknut (3/4 inch) 4 Hex-head bolt (5/8 x 2-1/2 inch) 4 Locknut (5/8 inch) Procedure 1.
Installing the Auger Auger weight: 102 kg (225 lb) 1. Insert the 4 hex-head bolts (5/8 x 2-1/2 inch) halfway through the hex sockets in the 2 auger-mounting plates (Figure 30). Note: When you have inserted the bolts correctly, the threaded shank of the bolts points outboard. Figure 29 1. Left auger 6. Key slot 2. Key 7. Inboard hole (auger shaft) 3. Locknut (3/4 inch) 8. Hex-head bolt (3/4 x 4 inch) 4. Auger sprocket 5. Hole (right auger) 9. Bearing 10. Set screw 3.
Figure 32 1. Locknut (5/8 inch) 4. Bearing 2. Hex-head bolts (5/8 x 2-1/2 inch) 5. Gap Figure 33 1. Boom-mounting fitting on the trencher 3. Set screw (locking collar) 3. Attach the lifting equipment to the rock boom and lift the boom (Figure 34). 4. Rotate the bearing until the mounting holes in the bearing are aligned with the 4 hex-head bolts (5/8 x 2-1/2 inch) as shown in Figure 32.
6. Install 2 hex-head bolts (3/4 x 2-1/2 inch), washers, and nuts into the vertical holes in the mounting plate and the boom-mount fitting (Figure 35). 12 7. Install 2 hex-head bolts (3/4 x 2-1/2 inch), washers, and nuts into the horizontal holes in the mounting plate and the boom-mount fitting (Figure 35). Aligning the Boom Note: Ensure that the mounting plate on the boom is flush with the boom-mount fitting on the trencher.
Shim Table Number of Shims for Correction 22 cm (48 inch) Rock Boom Shim-correction Dimension 152 cm (60 inch) Rock Boom Shim-correction Dimension 1 7.1 mm (0.28 inch) 9.4 mm (0.37 inch) 2 14.5 mm (0.57 inch) 19.6 mm (0.77 inch) 3 21.8 mm (0.86 inch) 29.5 mm (1.16 inch) 4. Install the lifting equipment to the boom and support it. 5. Loosen the 4 hex-head bolts (3/4 x 2-1/2 inch) and nuts (Figure 38). Figure 36 Left offset shown 1. Dimension A gap 3.
7. Apply thread-locking compound to the 2 horizontal bolts (1 x 2-1/2 inch). 14 8. Assemble the 2 horizontal bolts (1 x 2-1/2 inch) and 2 washers to the horizontal holes in the mount fitting and mounting plate, and tighten them by hand (Figure 38). Installing the Restraint Bar Note: If you use shims to correct the offset gap, ensure that the slots in the shims are aligned to both of the horizontal bolts. Parts needed for this procedure: 1 9.
Operation Selecting the Proper Components for the Rock Boom Figure 41 Using the correct trencher components helps to increase the trenching speed and extends the life of the trencher. Contact an Authorized Toro Service Dealer for more information on parts for your trencher. 1.
1 1 G021972 G02191 1 Figure 42 Figure 44 1. Cupped teeth 1. Rock and frost tooth • Rock and frost teeth (Figure 43) or shark teeth (Figure Arrangements of Digging Teeth 44) are best for cutting ground that is very hard, rocky, or frozen; it is also used for cutting through asphalt. The arrangement of digging teeth involves both where and how each tooth is attached to the digging chain.
Using the Trencher Note: To operate the trencher attachment, you must be seated in the operator seat. DANGER Using the Trencher Controls There may be buried power, gas, and/or telephone lines in the work area. An electric shock or an explosion may occur if you dig into a utility line. • Lift the lock ring to unlock the position of the trencher motor/vibratory plow joystick (Figure 46).
Using the Speed-Shift Switch Use the speed-shift switch to control the which speed range that the digging chain rotates. The speed-shift switch is located at the rear bulkhead at the left side of the machine, in the auxiliary-control panel. • Press the speed-shift switch up to operate the trencher chain in the Fast rotation range (Figure 47). Note: Use the fast-rotation position when soil is sandy, muddy, or wet.
Note: Remember that speed on the tachometer. 12. Decrease the digging chain speed and look at the tachometer. Note: If the engine speed increases, push the utility-traction lever forward until the engine speed is the same as in step 11. Repeat this step to obtain the best trenching speed. Note: Some hard soil conditions will allow you to dig a trench faster by reducing the chain speed.
Operating Tips conditions. To straighten the trench, raise the boom, reverse the ground travel and move the trencher forward until the digging chain clears the trench. Correct the alignment of the trencher to the trench and lower the boom. • Clean the area of trash, branches, and rocks before trenching to prevent damaging the equipment. • Always select the shortest boom, the lightest chain, and the lightest teeth to handle the job.
Maintenance Greasing the Rock Boom Service Interval: Every 50 hours Greasing the Trencher 1. Clean the grease fittings with a rag. Service Interval: Every 50 hours 2. Remove the dust cap from the grease fitting for the idler-wheel bearing (Figure 51). Grease specification: Lithium-based grease 1. Clean the grease fittings with a rag. 2. Connect the grease gun to the grease fitting for the bearing of the lower lift-cylinder, and apply 3 pumps of grease to the fitting (Figure 50). Figure 50 1.
Servicing the Planetary Drive Changing the Oil Checking the Oil Level Service Interval: Every 1,000 hours/Yearly (whichever comes first) Service Interval: Every 50 hours Note: Change the oil when it is warm, if possible. 1. Raise up and block the left side of the machine. Oil specification: SAE 80W140 API classification level GL4 2. Place a drain pan below the left side of the housing of the planetary drive (Figure 53). Transmission oil capacity: approximately 1.7 L (1.
9. Rotate the planetary drive counterclockwise until the port has moved from the 12 o’clock position to the 9 o’clock position (Figure 54). Figure 55 1. Lower wear strip Figure 54 1. Plug 4. Drain pan 2. Planetary drive 5. Oil servicing equipment 3. Chain 2. 51 to 76 mm (2 to 3 inch) gap 5. Stop the engine and remove the key. 3. Port (9 o’clock position) 6. Measure the distance between the chain and the bottom of the lower wear strip (Figure 55). 10.
Decreasing the Chain Tension WARNING If you remove the grease fitting from the boom before you release the pressure in the system, personal injury may result. Before removing the grease fitting, loosen (but do not remove) the plug on the opposite side of the boom. Figure 57 1. At the right side of the boom, loosen the 6 bolts that secure the lock bars and the side plates (Figure 56). 1. Bleed plug 2. Side Plate (left) 3.
2 1 g021975 Figure 59 1. Sprocket Checking the Trencher-Chain-Wear Strip and Wear Channel Figure 58 1. Lock bar 4. Grease fitting 2. Bolts 5. Side plate (right) 2. Bolt and nut Service Interval: Before each use or daily 3. Dust cap 1. Lift the chain at the wear strip at the top of the boom, and check the short and long segments of the wear strip for signs of damage or excessive wear (Figure 60). 2. Clean the area around the dust cap with a cleaning solvent (Figure 58).
2. Check the wear channel at the bottom of the boom for signs of damage and excessive wear (Figure 60). Note: If the wear channel is worn through to the bracket of the channel, replace the wear channel; refer to Replacing the Trencher-Wear Channel (page 34). Replacing the Trencher-Chain-Wear Strip 1. Loosen the trencher chain; refer to Decreasing the Chain Tension (page 31). 2. Lift the chain at the top of the boom, and install wood blocks between the chain and the boom (Figure 61).
Replacing the Trencher-Wear Channel 5. Install the bleed cap. 1. Loosen the trencher chain; refer to Decreasing the Chain Tension (page 31). 6. Start the engine of the machine, move the boom to the horizontal position, stop the engine and remove the key. 2. Remove the 10 hex-head bolts and washers (48 inch boom) or 14 hex-head bolts and washers (60 inch boom) that secure the wear channel to the bottom left and bottom right sides of the boom (Figure 63). Removing the Master Pin in the Digging Chain 1.
5. When the digging chain has cleared the drive sprocket, move the trencher motor/vibratory plow joystick to the NEUTRAL position, stop the engine, and remove the key (Figure 66). 6. Wrap the lifting strap around the digging chain at the idler wheel, and attach the strap to the lifting equipment (Figure 66). 7. Raise the lifting equipment and remove the digging chain from the boom (Figure 66). Installing the Digging Chain Preparing to Install the Digging Chain 1.
10. Stop the engine and remove the key. Aligning the Digging Chain This procedure requires 2 people to align the digging chain to the machine. 1. Route the ends of the lifting strap forward of the sprocket hub, on either side of the drive sprocket, and up past the dirt deflector (Figure 68). Note: Move the dirt deflector up and away from the lifting strap. Figure 69 1. Lifting strap 3. Idler wheel 2. Digging chain 6. Stop the engine and remove the key. 7. Remove the lifting strap from the machine.
Storage 1. Before storing the machine, brush off the dirt from the attachment. 2. Check the condition of the digging chain. Adjust and lubricate the chain. Replace any worn or damaged parts. 3. Check and tighten all bolts, nuts, and screws. Repair or replace any part that is damaged or worn. 4. Ensure that all hydraulic couplers are connected together to prevent contaminating the hydraulic system. 5. Paint all scratched or bare metal surfaces with paint available from an Authorized Service Dealer. 6.
Troubleshooting Problem The chain does not turn. Possible Cause 1. A hydraulic fitting is not completely connected. 1. Check and tighten all fittings. 2. A hydraulic fitting is damaged. 3. There is an obstruction in a hydraulic hose. 4. An auxiliary valve on the machine is not opening. 5. The boom-end bearing has failed. 6. The digging chain is too tight. 7. There is sand buildup in the tooth root of the drive sprocket. 2. Replace the damaged fitting. 3. Find and remove the obstruction. 8.
Notes: 39
Underground Equipment The Toro Underground Warranty A Limited Warranty Conditions and Products Covered The Toro Company and its affiliate, Toro Warranty Company, pursuant to an agreement between them, jointly warrant your Toro Underground Equipment (“Product”) to be free from defects in materials or workmanship. Where a warrantable condition exists, we will repair the Product at no cost to you including diagnostics, labor, and parts.
