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How to Disassemble the Extenda-Hoe on a Case 301G Safely
The Case 301G and Its Extenda-Hoe Configuration
The Case 301G tractor-loader-backhoe was part of Case’s compact utility lineup in the late 1960s and early 1970s, designed for small contractors, municipalities, and farm operations. It featured a mechanical backhoe with optional extendable dipper—commonly referred to as an “extenda-hoe”—which allowed operators to reach deeper trenches without repositioning the machine. Case, founded in 1842, was a pioneer in loader-backhoe integration, and the 301G helped expand their reach into the light-duty market.
The extenda-hoe mechanism consists of a nested dipper stick, hydraulic cylinder, wear pads, and shim plates. Over time, seals may leak and bushings wear, requiring disassembly for service. However, the sliding components are tightly fitted, and improper force can cause damage.
Terminology Notes
Disassembling the extenda-hoe requires patience and precision. In one case, an operator removed all bolts—including those securing the shim pads—but the inner dipper refused to slide out. This is common due to:
One technician in Iowa shared that his 301G’s extenda-hoe was stuck due to hardened grease and rust. After soaking the joint with ATF and acetone mix for 24 hours, he used a ratchet strap anchored to a tree to gently pull the inner dipper free. Another operator in Ontario found that his wear pads had swollen from water ingress, locking the dipper in place. He shaved the pads slightly and replaced them with new nylon inserts.
A retired Case mechanic in Nebraska recommended checking the extension cylinder rod for straightness. A bent rod can jam the dipper and prevent removal.
Preventive Measures and Recommendations
Disassembling the extenda-hoe on a Case 301G is a delicate process that rewards patience and methodical work. With proper support, lubrication, and alignment checks, the inner dipper can be removed without damage. The 301G’s mechanical simplicity makes it a durable machine—but only if its sliding components are maintained and serviced with care. Whether fixing a leak or replacing pads, understanding the extenda-hoe’s structure is key to a successful repair.
The Case 301G and Its Extenda-Hoe Configuration
The Case 301G tractor-loader-backhoe was part of Case’s compact utility lineup in the late 1960s and early 1970s, designed for small contractors, municipalities, and farm operations. It featured a mechanical backhoe with optional extendable dipper—commonly referred to as an “extenda-hoe”—which allowed operators to reach deeper trenches without repositioning the machine. Case, founded in 1842, was a pioneer in loader-backhoe integration, and the 301G helped expand their reach into the light-duty market.
The extenda-hoe mechanism consists of a nested dipper stick, hydraulic cylinder, wear pads, and shim plates. Over time, seals may leak and bushings wear, requiring disassembly for service. However, the sliding components are tightly fitted, and improper force can cause damage.
Terminology Notes
- Dipper Stick: The arm section between the boom and the bucket, often extendable in extenda-hoe models.
- Shim Pads: Adjustable plates that control lateral play and alignment between the inner and outer dipper sections.
- Wear Pads: Nylon or composite inserts that reduce friction and absorb movement between sliding surfaces.
- Extension Cylinder: A hydraulic actuator that pushes or retracts the inner dipper.
Disassembling the extenda-hoe requires patience and precision. In one case, an operator removed all bolts—including those securing the shim pads—but the inner dipper refused to slide out. This is common due to:
- Dried hydraulic fluid acting as adhesive
- Compressed wear pads gripping the dipper
- Misalignment from previous use or impact
- Residual pressure in the extension cylinder
- Support the Boom Safely: Use cribbing or a lift to stabilize the boom and prevent movement.
- Remove Bucket and Linkage: Reduce weight and improve access.
- Disconnect Hydraulic Lines: Bleed pressure from the extension cylinder.
- Remove Shim Pad Bolts: Loosen all fasteners on both ends of the dipper.
- Apply Penetrating Oil: Soak the sliding joint for several hours.
- Use Controlled Force: Tap with a dead-blow hammer or apply tension with a come-along. Avoid prying or striking with steel tools.
- Check for Hidden Fasteners: Some models include internal retaining pins or set screws.
One technician in Iowa shared that his 301G’s extenda-hoe was stuck due to hardened grease and rust. After soaking the joint with ATF and acetone mix for 24 hours, he used a ratchet strap anchored to a tree to gently pull the inner dipper free. Another operator in Ontario found that his wear pads had swollen from water ingress, locking the dipper in place. He shaved the pads slightly and replaced them with new nylon inserts.
A retired Case mechanic in Nebraska recommended checking the extension cylinder rod for straightness. A bent rod can jam the dipper and prevent removal.
Preventive Measures and Recommendations
- Grease the Extension Track Monthly: Prevent rust and reduce friction.
- Inspect Shim Pads Annually: Adjust or replace to maintain alignment.
- Use OEM Wear Pads: Avoid generic inserts that may swell or degrade.
- Drain Water from Boom Housing: Moisture accelerates corrosion.
- Document Bolt Locations: Some pads use different thread lengths.
Disassembling the extenda-hoe on a Case 301G is a delicate process that rewards patience and methodical work. With proper support, lubrication, and alignment checks, the inner dipper can be removed without damage. The 301G’s mechanical simplicity makes it a durable machine—but only if its sliding components are maintained and serviced with care. Whether fixing a leak or replacing pads, understanding the extenda-hoe’s structure is key to a successful repair.
