Operating
Storing Operator Manual
Adjusting Operator Seat
c CAUTION: Avoid injury! Check for knee clearance when boom is in extreme left and right swing positions.
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Front-to-Back Adjustment
1. Remove four cap screws (A) and lockwashers holding seat to plate.
2. Install seat in one of the available positions. Make certain operator can reach controls and knees clear boom when it is in extreme left and right swing positions.
3. Install lockwashers and cap screws.
Height Adjustment
1. Remove bolt (A), lockwasher and nut.
2. Raise or lower seat bracket (B).
3. Install bolt (A), lockwasher and nut.
Pivoting Seat
485 backhoe: Lift up on seat to pivot forward until handle (A) locks into cutout area.
375 backhoe: Press seat latch (B) toward seat to allow seat to pivot forward.
Using Controls
Boom And Swing Control Lever (A):
• To raise boom: pull lever to rear.
• To lower boom: push lever forward.
• To swing boom to left: push lever to left.
• To swing boom to right: push lever to right.
Dipperstick And Bucket Control Lever (B):
• To retract dipperstick: pull control lever to rear.
• To extend dipperstick: push control lever forward.
• To curl bucket in: push lever to left.
• To roll bucket out: push lever to right.
Stabilizers Control Levers; Left (D), and Right (C):
• To raise stabilizer: pull control lever back.
• To lower stabilizer: push control lever forward.
Operating Tractor
Operate tractor engine at the proper speed to reduce hydraulic system heat buildup in hot conditions. Minimum speed on all tractor models is 1400 rpm.
Operate engine at the following maximum speeds when using backhoe in hot conditions:
Model 4120, 4320, 4520, 4720 Tractor: 2100 rpm
Other Models Gear Drive Tractor : 2400 rpm
Other Models Hydrostatic Drive Tractor : 2700 rpm
Faster engine speeds result in faster backhoe movement. When operating where precise movements of the backhoe are required, slow the engine to slow backhoe movement.
Digging forces and breakout forces are functions of hydraulic pressure only, and are the same at any digging rpm.
Entering and Exiting Backhoe
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c CAUTION: Avoid injury! Stay clear of path when raising or lowering stabilizer leg.
Foot platform is small. Be careful to maintain balance and avoid tripping when entering and exiting backhoe. |
Enter Backhoe
1. Set engine speed to just above slow idle.
2. If open, close and lock cab window.
3. Stand in area between right stabilizer leg (A) and boom (B), facing the tractor.
4. Pull right stabilizer control lever (C) forward to lower right stabilizer leg just until end of leg is on ground.
5. Enter backhoe using step (D) and hand rail (E).
Exit Backhoe
1. Set engine speed to just above slow idle.
2. Pull left stabilizer control lever back to fully raise left stabilizer leg.
3. Push right stabilizer control lever forward to lower right stabilizer leg just until end of leg is on ground.
4. Exit backhoe using rail and step.
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c CAUTION: Avoid injury! Stay clear of path when raising or lowering stabilizer leg.
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5. Stand in area between right stabilizer leg and boom, facing the tractor.
6. Push right stabilizer control lever back to fully raise right stabilizer leg.
Removing Boom And Swing Locking Device
2. Pull lift rod (A) up and towards back of tractor, raising locking device (B) from pin on swing, and locking into latch (C).
Digging Safely
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c CAUTION: Avoid injury! To dig safely:
• Lower stabilizers to the ground. Stabilizers will leak down if the tractor is lifted. |
Operating Backhoe
Digging Position
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c CAUTION: Avoid injury! Avoid serious injury or death: Check for buried electric cables or gas pipes before you dig.
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1. Lower backhoe stabilizers (A), and loader bucket (B) to ground.
2. Close and lock cab rear window.
3. Set engine speed. See Operating Tractor in OPERATING.
Digging Angle
1. Put dipperstick at correct angle to boom for digging, approximately 90 degrees.
2. Put bucket teeth in-line with crowd angle (C).
Bucket Digging
2. Retract dipperstick and curl bucket until full.
3. Raise bucket, swing, and dump onto spoil pile.
Dipperstick Digging
1. Lower bucket until teeth lie flat on ground.
2. Retract dipperstick until bucket is half full.
3. Retract dipperstick as you roll bucket back.
4. When bucket is full, raise, swing, and dump onto spoil pile.
Spoil Pile Location
Put spoil pile (A) where minimum effort is needed to back fill.
Spoil pile should be a minimum of 0,6m (2 ft) from hole.
Operating Backhoe Thumb (If Equipped)
IMPORTANT: Avoid damage! Improper use of mechanical thumb will damage backhoe and/or thumb. • as a pry bar to loosen objects. • to push or pull material or objects. |
NOTE: Grasping large objects such as rocks and logs will increase momentum of the backhoe as it moves from side to side.
Do not make sudden start and stops when moving large objects.
Be aware when lifting and moving long objects that may extend beyond normal backhoe swing arc area.
The mechanical thumb can be used to pick up objects and secure them between thumb and bucket.
When thumb is not in use, it should be placed in the storage position as follows:
2. Slide column assembly to its shortest position.
3. Secure using hitch pin and cotter pin.
Lifting With Backhoe
IMPORTANT: Avoid damage! Do not use backhoe as towing vehicle. Damage to backhoe and tractor could occur. |
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c CAUTION: Avoid injury! Improper lifting may cause crushing, injury or death. To lift safely:
• Fasten chains to object and backhoe. |
1. Extend boom and dipperstick until you can fasten chain to object.
2. Fasten chain to dipperstick approximately 50 mm (2 in.) above bucket pin.
4. Raise boom to full height. Extend dipperstick cylinder if needed.
5. Retract dipperstick cylinder to lift load.
Transporting Backhoe
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c CAUTION: Avoid injury! To help prevent injury while transporting backhoe:
• Look for people or obstacles BEFORE you change directions. • LOCK backhoe in TRANSPORT position. See steps below. |
1. Fully raise and center the boom.
2. Fully retract the dipperstick.
3. Curl the bucket back into dipperstick.
4. Fully raise the left stabilizer leg.
6. Set boom and swing locking device:
a. Pull latch handle (A) towards the operator to release the locking device.
b. Be sure the pin is fully inserted on swing frame (B) and the locking arms are resting on the spools located on both sides of the boom.
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c CAUTION: Avoid injury! Stay clear of path when raising or lowering stabilizer leg.
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8. Stand in area between right stabilizer leg and boom, facing the tractor.
9. Push right stabilizer control lever back to fully raise right stabilizer leg.
10. Install Slow Moving Vehicle (SMV) sign in bracket (C) on bucket cylinder.
Transporting Tractor With Backhoe
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c CAUTION: Avoid injury! Do not chain backhoe down in order to secure tractor to trailer.
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NOTE: Backhoe bucket should be lowered to trailer bed if possible.
1. Put wheel chocks against tractor wheels. Chain tractor securely to trailer bed.
2. Do not attach hold-down chains to any part of the backhoe assembly. Lower the backhoe bucket to the trailer bed, if possible.
3. Put stabilizers in full up position and strap arms together to ensure they remain in up position during transport.