Form No. 3389-750 Rev A Heavy Duty Backhoe 125 RT600 Traction Unit Model No. 25432—Serial No. 313000001 and Up Model No. 25432E—Serial No. 313000001 and Up Register at www.Toro.com.
This manual identifies potential hazards and has safety messages identified by the safety alert symbol (Figure 2), which signals a hazard that may cause serious injury or death if you do not follow the recommended precautions. 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. Figure 2 1. Safety alert symbol This manual uses 2 words to highlight information.
Safety Contents Safety ........................................................................... 3 Safety and Instructional Decals ................................. 5 Setup ............................................................................ 8 1 Preparing to Install the Attachment onto the Traction Unit ...................................................... 9 2 Installing the Backhoe Wiring Harness ..................... 9 3 Installing the Mounting Plates to the Machine ...........................
CAUTION Hydraulic fittings, hydraulic lines/valves, and hydraulic fluid may be hot and can burn you if you touch them. • Wear gloves when maintaining hydraulic components. • Allow the traction unit and trencher to cool before touching hydraulic components. • Do not touch hydraulic fluid spills.
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. Figure 3 1. Decal 125-8474 2. Decal 125-8476 3. Decal 125-6690 4. Decal 125-6694 5.
125-6694 1. Tie-down point 125-6690 1. Whole body crushing hazard—keep away from the machine when in operation. 125-8474 1. Warning—read the Operator’s Manual. 10. Lower the right stabilizer. 2. Tipping/crushing hazard—read the Operator’s Manual. 11. Raise the right stabilizer. 3. Explosion hazard; electric shock hazard—do not dig until you 12. Raise the bucket. have called local utilities. 4. Move the backhoe boom to the left. 13. Move the backhoe arm forward. 5. Lower the backhoe boom. 14.
125-8476 1. Unlock the boom only when in the operating position. 3. Read the Operator’s Manual. 2. Lock the boom before leaving the operating position. 125-8477 1. Lock the backhoe boom position. 2. Unlock the backhoe boom position.
Setup Loose Parts Use the chart below to verify that all parts have been shipped. Procedure 1 2 3 4 5 6 7 8 Description Qty.
Procedure 9 10 11 12 13 14 15 Description Use Qty. Clamp Bolt (3/8 x 1 inch) Washer (3/8 inch) Locknut (3/8 inch) Hose (3/4 x 40-1/2 inch) 90° hydraulic fitting (3/4 inch) 2 1 2 1 2 2 Install the hydraulic-pressure and hydraulic-return hoses. No parts required – Route and connect the backhoe wiring harness. E-stop switch 1 Install the E-stop switch. No parts required – Install the controls cover and the panels. No parts required – Bleed the hydraulic system.
Figure 6 Figure 4 1. Forked terminal (E-stop switch) 4. Two-pin connector (machine harness connection) 2. Two-socket connector (operator-presence switch) 5. One-socket connector (machine harness connection) 3. Backhoe-wiring harness 6. One-pin connector (machine harness connection) 1. Backhoe-wiring harness 5. One-socket connector (machine harness, E-stop) 2. Two-pin connector (backhoe harness, E-stop) 6. One-socket connector (backhoe harness, E-stop) 3.
3 Installing the Mounting Plates to the Machine Parts needed for this procedure: Figure 7 1. Bulkhead plate 1 Left mounting plate 1 Right mounting plate 4 Bolt (1-1/4 x 3-1/2 inch) 4 Washer (1-1/4 inch) Procedure 3. Engine-oil drain cap Note: The weight of each mounting plate weight is 40.4 kg (89 lb). 2. Backhoe wiring harness 1. Align the left and right mounting plates to their respective front attachment mounting points on the frame of the machine (Figure 9). 3.
4 Installing the Backhoe and the Brackets onto the Machine Parts needed for this procedure: 1 Bracket, walkway support 1 Bracket, hydraulic tube 8 Bolt (3/4 x 2 inch) 4 Bolt (3/4 x 2-1/2 inch) 2 Bolt (3/4 x 2-3/4 inch) 14 Washer (3/4 inch) 14 Locknut (3/4 inch) Procedure Figure 10 WARNING Lifting heavy machines and attachments improperly could result in serious injury or even death. 1. Dipper-actuator mounting point 4. Back-plate mounting hole 2. Handle bar 5. Mounting-plate hole 3.
7. Install the 7 horizontal bolts (3/4 x 2 inch), the 7 washers, and the 7 locknuts in the remaining holes at the back side of the right and left mounting plates, and tighten these fasteners by hand (Figure 13). Figure 11 1. Locknut (3/4 inch) 4. Walkway-support bracket 2. Mounting plate 5. Washer (3/4 inch) 3. Back plate of the backhoe 6. Bolt (3/4 x 2-3/4 inch) 4.
3. Slip the washer (13/16 inch) over the end of the locking pin and past the spring-loaded ball (Figure 14). 5 Installing the Walkway Pivot Bracket Installing the Walkway to the Machine 1. Thread the grease fitting into the hole in the cylindrical part of the pivot bracket (Figure 15).
3. Apply grease to the grease fitting. Note: Use a lithium-base grease. Note: Clean up any excess grease on the walkway pivot with a rag. 4. Rotate the walkway clockwise until the hole in the forward, horizontal flange of the walkway is aligned with the hole in the horizontal flange of the walkway support bracket (Figure 16). Note: Raise or lower the pivot bracket as needed to align the walkway with the walkway support bracket. 5.
7 Installing the Stabilizers Parts needed for this procedure: 2 Stabilizer 2 Pin (1-1/2 x 8 inch) 4 Snap ring (1-1/4 inch) Procedure 1. Lubricate the inside diameter of the 1-1/4-inch and 1-1/2-inch bushings of the stabilizers with grease at the front and back plates of the backhoe (Figure 18). Figure 19 1. Snap ring (1-1/4 inch) 3. Lower bushings 2. Pin (1-1/2 x 8 inch) 4. Stabilizer 5. Insert a pin (1-1/2 x 8 inch) through the holes in the backhoe frame and the stabilizer (Figure 19). 6.
8 Installing the Stabilizer Actuators and Hoses Parts needed for this procedure: 2 Cylinder 2 Pin (1-1/4 x 8 inch) 4 Bushing 2 Pin (1-1/4 x 6 inch) 12 Washer (1-3/8 inch) 8 Snap ring (1-1/8 inch) 2 90° hydraulic fitting (3/8 inch) 4 Cable tie Installing the Hydraulic Actuators Figure 20 Note: The weight of each cylinder is 31.6 kg (69.6 lb). 1. Snap ring (1-1/8 inch) 1. Attach the hydraulic actuator to the backhoe as follows: 2. Pin (1-1/4 x 8 inch) partially 6.
Note: Allow the pin to extend slightly through the pivot point. B. Slip a 3 washers (1-3/8 inch) over the short segment of the pin (Figure 20). C. Remove the plugs from the ports of the cylinder and cover the holes with a clean rag (Figure 20). D. Extend the piston fitting of the cylinder to the 32 mm (1-1/4 inch) pivot point of the stabilizer. Note: Residual hydraulic fluid may eject from the cylinder ports. E. Continue inserting the pin through the piston fitting of the cylinder (Figure 20). F. G.
9 Installing the Hydraulic Pressure and Return Hoses Parts needed for this procedure: 2 Clamp 1 Bolt (3/8 x 1 inch) 2 Washer (3/8 inch) 1 Locknut (3/8 inch) 2 Hose (3/4 x 40-1/2 inch) 2 90° hydraulic fitting (3/4 inch) Procedure 1. Place a drain pan under the hydraulic-shunt fitting that connects the bulkhead fittings for the hydraulic pressure and return circuits of the machine (Figure 24). Figure 25 1. Hydraulic-pressure hose 6. Locknut (3/8 inch) 2. Hydraulic-return hose 7.
10 Routing and Connecting the Wiring Harness onto the Backhoe No Parts Required Procedure 1. Remove the 4 bolts and 4 washers that secure the controls cover to the operator pedestal of the backhoe, and remove the cover (Figure 26). Figure 27 3. Washer 2. Controls cover 4. Bolt 5. Console-support plate (left) 2. Forward 6. Console-support plate (right) 3. Two-socket connector 7. Hydraulic hoses 4. Seat-post tube 8. Hydraulic-bulkhead plate 3.
1 6. Route the branch of the wiring harness with the 2-forked electrical terminals forward of the hydraulic manifold and hoses, and then route it to the right (Figure 28). 3 2 4 G023512 Figure 30 Bottom view 1. Terminal screw A 2. E-stop switch 11 Figure 29 1. E-stop switch 3. Forked terminals 2. Hydraulic manifold 4. Backhoe-wiring harness 3. Saddle washers 4. Terminal screw B Installing the E-Stop Switch Parts needed for this procedure: 7.
B. Remove the screw that secures the E-stop button to the E-stop switch, and remove the button (Figure 31). C. Remove the C-clip and the jam nut from the body of the E-stop switch (Figure 31). E. Align the square recess in the back of the E-stop button to the square fitting of the E-stop switch. 2. Install the E-stop switch as follows: A. Locate the alignment tang on the body of the E-stop switch (Figure 32). F.
13 Bleeding the Hydraulic System No Parts Required Procedure WARNING Co-workers and bystanders near the moving attachment parts come into contact with an attachment part, causing serious injury or death. Be aware of where other workers are in the area while you are bleeding the hydraulic system, and keep others away from the area. 1.
Figure 36 Figure 35 1. Left-stabilizer control 1. Bucket and dipper control (bucket movement) 2. Right-stabilizer control • Move the dipper control to extend and retract the 8. Move both stabilizers to the down position (Figure 35). dipper several times to move the dipper through its full range of movement. 9. Move the backhoe controls as follows: • Move the bucket control to curl and extend the bucket several times to move the bucket through its full range of movement.
Figure 37 Figure 38 1. Bucket and dipper control (dipper movement) 1. Boom control (elevation movement) • Move the boom elevation control up and down • Move the boom swing control left and right several several times to move the boom through its full range of movement. times to move the boom through its full range of movement.
and then to the right (extend or “crowd out” the bucket); refer to Figure 36. Note: The bucket should not move. C. Sit in the backhoe operator seat. D. Move the bucket and dipper control to the left and then to the right (Figure 36). Note: The bucket should curl and then extend. E. Press the E-stop button (Figure 40). Note: The engine of the traction unit should stop. Figure 39 1. Boom control (swing movement) Figure 40 10.
Product Overview 15 Lubricating the Stabilizers No Parts Required Procedure 1. Raise the stabilizers. 2. Clean the grease fittings (Figure 41) with a rag. Figure 42 1. Dipper 5. Hand rail 2. Boom 6. Walkway 3. Boom-latch handle 4. Controls 7. Bucket 8. Left stabilizer Figure 41 3. Connect the grease gun to the grease fittings, and apply 2 or 3 pumps of grease to each fitting. 4. Wipe up any excess grease. 5. Lower the stabilizers. Figure 43 1. Seat 4. Operator console 2. Swing-lock pedal 5.
E-Stop Switch Use the remote engine shutoff control knob to stop the engine when you are in the backhoe operator’s seat. • Push down on the control knob to stop the engine (Figure 44). • Pull up on the control knob before re-starting the engine (Figure 44). Note: The engine will not start if the control knob is not pulled up in the Reset position. Swing-Lock Pedal and Boom-Lock Handle Figure 44 1. Boom extension and swing 4. Dipper extension and control lever bucket control lever 2.
Specifications Boom-Lock Handle Use the boom-lock handle to release the lock for the boom and allow the boom to move from the transport (upright) position (Figure 46). Pull the boom-lock handle rearward to unlock the boom lock. Figure 47 Figure 46 1. Boom lock 1. Reach from centerline of front axle of the machine 429 cm (169 in) 2. Digging reach from swing pivot 34 cm (136 in) 3. Digging depth (maximum) 222 cm (87 in) 4. Digging depth, 0.6 m (2 foot) flat bottom trench 215 cm (85 in) 5.
Operation 3. Push the stabilizer control forward until the stabilizers has removed the weight of the machine from the front wheels slightly (Figure 48). Determine the left and right sides of the machine from the normal operating position. The backhoe controls consists of 4 levers and 1 button. The left lever controls the boom and the swing; the 2 middle levers control the left and right stabilizers, and the right lever controls the dipper and the bucket.
Using the Boom and Swing Locks Unlocking the Boom Lock 1. Push the boom control forward (Figure 50). Figure 50 1. Boom control forward 2. Boom-latch handle rearward Figure 49 1. Left stabilizer control 2. Right stabilizer control 3. Boom control rearward 2. Pull the boom-latch handle rearward (Figure 50). 3. Pull the boom control rearward; the backhoe will move out of the transport locked position (Figure 50). 4. Release the stabilizer controls.
2. Move the swing-lock pedal forward and release the pedal (Figure 52). Locking the Swing Lock Note: You must center the boom, the dipper, and the bucket left to right and lock them before you can safely transport the backhoe. Refer to Locking the Boom Lock (page 31). 1. Raise and center the boom, the dipper, and the bucket; refer to Controlling the Dipper and the Bucket (page 35). 2. Swing the boom, the dipper, and the bucket to the center point, between left and right. 3.
Preparing to Use the Backhoe Before Digging with the Backhoe WARNING Before Operating the Backhoe Co-workers and bystanders near the working site could come into contact with the machine or thrown debris, causing serious injury or death. Service Interval: Before each use or daily Important: The backhoe is not a crane and should not be used as one. Do not use the backhoe as a lifting device. Be aware of where other workers are in the area, and keep others away from the work area.
Controlling the Backhoe Controlling the Boom and the Swing You can control the boom and the swing of the backhoe by operating the left lever (Figure 56) as follows: • Push this lever forward to lower the boom; pull it rearward (toward you) to raise the boom. • Move this lever to the left to swing the bucket to the left; move it to the right to swing the bucket to the right. Figure 55 1. Hand rails 3. Walkway 2. Foot hold 6.
Controlling the Dipper and the Bucket Digging with the Backhoe You can control the dipper and the bucket by operating the right lever (Figure 58) as follows: Filling the Bucket • Push this lever forward to extend (“crowd out”) the Fill the bucket by operating the dipper, the boom, and the bucket as necessary to keep the bottom of the bucket parallel with the cut (Figure 60). dipper and the boom; pull it rearward (toward you) to curl (“crowd in”) the dipper and the boom.
3. Raise the swing-lock pedal to lock it; refer to Locking the Swing Lock (page 32). 4. Rotate the bucket completely in and retract the dipper; refer to Controlling the Dipper and the Bucket (page 35). 5. Lock the boom to the upright position; refer to Locking the Boom Lock (page 31). Note: The backhoe boom will move toward you (past vertical position) during this procedure. 6. Raise the stabilizers completely; refer to Raising the Stabilizers (page 30).
the boom, and dump the bucket in the spoil area on the high side (if there is one) of the trench or excavation. 3. Slowly drive the machine onto the transport vehicle. 4. Set the parking brake on the machine. • Carefully plan where you will deposit the spoil that you 5. At the backhoe console, release the boom lock and lower the boom and the dipper until the bucket is resting on the deck of the transport vehicle (Figure 62). remove from the excavation.
Maintenance Lubricating the Backhoe Service Interval: Before each use or daily Grease Type: Lithium-based grease. Greasing the Fitting on the Right Side of the Backhoe 1. Clean the grease fittings with a rag (Figure 63, Figure 64, and Figure 65). 2. Connect the grease gun to the grease fittings for the upper and lower pivots; apply 2 or 3 pumps of grease to each fitting (Figure 63, Figure 64, and Figure 65). 3. Wipe up any excess grease. Figure 65 Greasing the Fitting on the Left Side of the Backhoe 1.
Raising and Lowering the Seat Raising the Seat 1. Remove the hairpin from the seat-lock pin (Figure 69). Figure 67 Figure 69 1. Seat-lock pin 2. Hairpin 2. Remove the seat-lock pin from the mounting plates and the seat post (Figure 70). Figure 68 Figure 70 1. Mounting plate 3. Seat post 2. Seat-lock pin 4. Hand rail 3.
4. Fully insert the seat-lock pin through the holes in the mounting plates (Figure 70). Storage 5. Install the hairpin into the hole in the seat-lock pin (Figure 69). • When you are not using the backhoe, store it indoors in a clean and dry place. Note: If you are not able to store the backhoe indoors, cover the backhoe to keep moisture, dirt, and debris. Lowering the Seat 1. Remove the hairpin from the seat-lock pin (Figure 69). • Grease all exposed cylinder rods to prevent them from rusting. 2.
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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.
