Machine Shop 1 – Machining Skills for Prototype Development (Length: 40:32)

• Basic tour of the machine shop
• Layout techniques (including transferring hole locations)
• Basic tools: drill press, band saw, belt sander and grinder
• Locating and drilling holes (includes using a center finder and deburring)
• Tapping holes (including using a tap guide)

Machine Shop 2 – Machining Skills for Prototype Development (57:33)

• Drilling holes
• Special drills for plastics and hard or abrasive materials
• Drill press limitations
• Bandsaw
• Suitable speeds, feeds and materials
• Bandsaw setup
• Using the drill press vise

Machine Shop 3 – Machining Skills for Prototype Development (30:02)

• Good practice – clean up
• Small belt sander configurations
• Grinder operations and materials
• Deburring and buffing
• Finishing techniques

Machine Shop 4 – Milling Machine 1 (50:33)

• Parts and controls of a Bridgeport Mill
• Quill feed
• Axis handfeeds & backlash explanation
• Gib locks
• Power feed
• Digital readouts
• Milling machine set-up – squaring/tramming  the head square
• Squaring the vise – adjusting the vise so the stationary jaw is parallel to the bed
• Milling machine accessories and work-holding techniques

Machine Shop 5 – Milling Machine 2 (1:03:33)

• Square and hex collet blocks – used to hold/clamp parts to machine features on 4 and 6 sides of a part respectively
• V-blocks
• Hold-down clamps – used to hold large or irregularly shaped parts
• Using angle blocks – used to hold materials to machine features not perpendicular on a part
• Drill press vise – using a vise within a vise
• Lathe chuck with vise  – can be used to hold parts in the milling machine
• Double sided tape – can be used to securely hold a part without distortion
• Squaring high aspect ratio parts
• Right angle attachment
• Slitting saws – used to cut slots/slits/features in a part
• Rotary table – used to machine circular parts, grooves, circles, and segments .  A dial indicator or Coaxial indicator can be used to square/center the table to the X & Y axes
• 5C collet indexer – used to hold collets and to position parts in up to 24 positions

Machine Shop 6 – Milling Machine 3 (42:36)

• Squaring a part  – machining a piece of metal so all of the surfaces are flat, perpendicular and milled to the nominal size . Also covers using a fly-cutter and deburring
• Squaring a plate
• Using the edge finder
• Drilling holes with a mill

Machine Shop 7 – Milling Machine 4 (23:07)

• Reaming holes
• Boring holes with a boring Head – also covers using Plug Gauges to measure hole sizes
  
• Milling a slot
• Milling a shoulder, conventional and climb milling
• Cleaning the machine

Follow the complete repair and restoration in my projects page.

Follow the complete repair and restoration in my projects page.

Follow the complete repair and restoration in my projects page.

Follow the complete repair and restoration in my projects page.

Model: John Deere 317L

Year: 1982

Engine: Non-OEM, Briggs & Stratton 16HP Opposed Twin

Options: Front and Rear Hydraulics w/3-Point Hitch.

History: Here is a little history compliments of Weekend Freedom Machines.

 In 1979 John Deere began manufacturing models 314 and 317, respectively. Very much the same as previous hydrostatic models, the 314 and 317 represented the “basic” and “deluxe” versions of the 300 series hydrostatic tractors from 1979 until the 1983-1984 time period. One design change that is readily apparent was relocating much of the steering gear to the left side of the chassis. The 314 was an upgraded version of the 312 that reintroduced engine side panels on the “basic” tractor, increased horsepower to a 14HP Kohler engine, and standard installation of the wider 23×10.50×12 rear tires.

The 317 was John Deere’s first attempt at introducing a twin-cylinder engine into the 300 series tractor. A horizontally opposed Kohler KT17QS engine producing 17 horsepower was mated to a 300 series frame, resulting in the model 317. Offered as standard equipment on the 317 were headlights & taillights, ammeter, dual-spool hydraulics and individual rear wheel brakes.

It is no secret that the 317 has had its share of engine problems. Many of the model 317 tractors suffered catastrophic engine failure as a result of poor lubrication to the connecting rod journals of the crankshaft. The engine utilized a “Pressure spray” lubrication system, which operated at approximately 5 PSI and did not provide pressurized oil to the connecting rod journals. Instead, the connecting rod journals were lubricated with oil sprayed down from the camshaft. This resulted in inadequate lubrication, particularly if the tractor was operated on a side-hill incline. Kohler did not offer an immediate solution to this problem, and as an interim solution John Deere engineered a retrofit kit that would allow an Onan p218G to be installed into the 317 chassis.

Eventually Kohler did rectify the problematic KT17 engine by redesigning the engine with a full pressure lubrication system. Known as the KT17 Series II, the engine operated at a significantly higher oil pressure of 25-50 PSI. Kohler also cross-drilled the crankshaft, which allowed oil to be supplied under pressure to the connecting rod journals. The result was a much more durable engine with significantly longer life. A KT17 Series II engine can be identified by a specification (Spec.) number of 24300 or higher. Well into its last year of production, 1982, the 317 came equipped with a Kohler KT17 Series II engine as standard equipment from the factory. Unfortunately the reputation of the 317 and the original KT17 engine was well established by this point.

Follow the complete repair and restoration in my projects page.

– Kenichi Ohmae, Business Coach