L Series PTO Shaft Lemon Tube | L1 hangtod L6 ug L32

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If you've been told your implement requires a lemon-profile driveline but aren't sure which model fits, start here. The L Series PTO Shaft Lemon Tube product family covers seven distinct models spanning L1 to L6 plus the specialty L32. Each model uses the same two-lobe lemon tube cross-section but scales up in tube diameter, cross-bearing size, and torque capacity to match different HP classes. Together they handle everything from a 10 HP compact tractor running a seed drill to a 80 HP mid-range machine driving a disc mower.

The lemon profile is the second most popular tube shape in Korean agriculture after triangular. Korean operators tend to choose the L Series PTO Shaft Lemon Tube when the implement requires moderate angular flexibility at the telescoping joint, particularly disc mowers, rotary rakes, and fertilizer spreaders where the implement height changes frequently during operation.

What Sets L32 Apart from L1-L6?

The L32 is a specialty variant with a wider lemon tube profile designed for applications that need more overlap travel in a shorter overall length. It's popular on front-mounted PTO implements and compact equipment where the distance between tractor and implement is limited. The standard L1 to L6 models follow the industry incremental sizing used across the industry.

Torque Ratings by Model

Select your L Series PTO Shaft Lemon Tube model based on these torque values. Always choose a model rated at least 25% above your tractor's actual PTO torque output.

Component Breakdown and Assembly Structure

Every L Series PTO Shaft Lemon Tube ships as a complete assembly, but understanding the individual components helps with maintenance and ordering replacement parts. Here's what's inside:

Lemon Tube Pair (Inner + Outer)

Cold-drawn C45 carbon steel with the characteristic two-lobe profile. The inner tube slides inside the outer tube, transmitting torque through face contact while allowing axial extension and compression. The lemon shape creates a slight wedging action that distributes stress more evenly than sharp-cornered profiles. Wall thickness ranges from 3 mm on L1 to 4.5 mm on L6.

Forged Yokes

Two 40Cr alloy steel yokes, one for the tractor end and one for the implement end. Each yoke has a splined bore that mates with the PTO stub or gearbox input shaft. The L Series PTO Shaft Lemon Tube supports multiple yoke attachment styles: push pin (most common), bolt pin, split pin, quick release, ball attachment, and collar type. The part number suffix identifies which yoke combination is fitted.

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Two universal joint assemblies, one at each end. Each kit contains four needle-roller bearing cups pre-loaded with EP grease and sealed with multi-lip dust seals. The cross-kit size scales with the L-series model number. L1 uses the smallest cross (22x54 mm), while L6 uses the largest in the range. Replacement kits are stocked individually for all models.

How to Shorten or Adjust Shaft Length

A common question from Korean buyers is whether the L Series PTO Shaft Lemon Tube can be shortened if the standard length is too long for their setup. The answer is yes, but there are important rules to follow.

When Shortening Is Necessary

If the PTO shaft bottoms out (inner tube pushes all the way into the outer tube) when the implement is raised to transport height, the shaft is too long. This causes the telescoping joint to bind, which puts excessive axial load on the cross-bearings and can crack the yokes. Shortening is the fix.

  

Correct Cutting Procedure

Both inner and outer lemon tubes must be cut by the same amount to maintain proper overlap. Mark the cut lines, then use a bandsaw or abrasive cutoff wheel (not a torch, which would distort the lemon profile and ruin the fit). After cutting, deburr the cut ends with a file. Ensure at least 150 mm of overlap remains at maximum extension. If you're not confident about cutting, we offer custom-length L-series shafts cut to your specification at the factory.

How a Tractor PTO Shaft Works

For operators new to PTO equipment, here's a quick explanation of the mechanical principle. The tractor engine produces rotational power. A portion of that power is diverted through the PTO gearbox to a splined stub shaft protruding from the rear of the tractor. The L Series PTO Shaft Lemon Tube connects to that stub via the tractor-end yoke spline, transmits the rotation through the lemon tubes, and delivers it to the implement's input shaft via the implement-end yoke. The two universal joints allow the shaft to operate at slight angles as the implement moves up and down. The telescoping lemon tubes accommodate distance changes as the implement raises, lowers, or turns.

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L-Series Shaft and Gearbox Pairing

The implement end of the L Series PTO Shaft Lemon Tube feeds into an gearbox sa agrikultura that converts PTO rotation to the speed and axis the working mechanism requires. A disc mower gearbox, for example, takes 540 RPM and redirects it to spin the cutting discs at the required blade tip speed. Make sure the gearbox input spline matches the shaft's implement-end yoke. Specify both configurations when ordering.

Available Accessories

The L Series supports SA ratchet torque limiters, SB shear bolt limiters, SFF friction clutches, RA overrunning clutches, and WA/CV wide-angle joint upgrades. All are factory-installable. Lemon tube pairs, cross-bearing kits, and individual yokes are stocked as separate replacement parts.

Why Korean Operators Choose L-Series Lemon Shafts

• ★ Seven models from L1 to L6 plus L32 cover 10 to 80 HP with published torque ratings
• ★ Lemon tube profile provides smoother angular tolerance than triangular for disc mower and rake use
• ★ L32 specialty model for front-mount and short-distance PTO applications
• ★ Compatible with all five torque limiter types (SA, RA, SB, SFF) and WA/CV wide-angle upgrades
• ★ Field-shortenable tubes with simple bandsaw procedure, or order custom lengths from factory
• ★ CE, ISO 9001, TS/16949 certified with material test reports per batch
• ★ Individual replacement parts stocked in Korea: lemon tube pairs, cross kits, yokes, shields

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Which L-series model fits a 40 HP tractor running a disc mower?

For 40 HP at 540 RPM, continuous torque is about 530 Nm. The L3 (MP 640 Nm) provides a reasonable margin. If the mower hits heavy grass or tangles often, step up to L4 (MP 780 Nm) for extra headroom.

What's the difference between L2 and L32 if they have the same torque rating?

Same torque capacity but different tube geometry. L32 has a wider lemon profile that gives more telescoping travel in a shorter closed length. It's designed for tight mounting situations like front PTO implements. L2 uses the standard lemon profile with longer tube overlap.

Can I swap lemon tubes for triangular tubes on the same yokes?

No. The yoke tube seat is shaped to match the tube profile. A lemon yoke won't properly grip a triangular tube and vice versa. If you want to change profiles, you need a complete shaft assembly or new yokes with matching tube seats.

How long do L Series lemon tubes last before needing replacement?

Typically three to five seasons with proper lubrication (re-grease the overlap zone every 50 hours). If the tubes develop visible wobble or don't slide smoothly, they've worn past the service limit and should be replaced as a pair.

Does the L Series PTO Shaft Lemon Tube fit Japanese compact tractors?

Yes. Metric 8-spline yokes for Kubota, Yanmar, and Iseki are available on all L-series models. Specify your tractor make and model when ordering.

Can I add a wide-angle joint to an L Series PTO Shaft Lemon Tube?

Yes. The WA (wide-angle) and CV (constant velocity) joint options are compatible with all L-series models. The wide-angle housing replaces the standard cross-bearing on the implement end, increasing the maximum operating angle from 25 degrees to 80 degrees.

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Go Eun-bi, Disc Mower Operator, Chungcheongnam-do (spring 2025)

"L4 lemon shaft on a 50 HP tractor with a Krone-style disc mower. The lemon tubes handle the constant height changes as the mower follows the ground contour. Smooth telescoping, no binding. Ten months of regular mowing and the cross-bearings are still tight."

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Woo Seung-jun, Farm Equipment Dealer, Naju (late 2024)

"I sell the L-series alongside the T-series. For customers running disc mowers or rotary rakes, I push the L-series because the lemon profile gives a smoother feel at the telescoping joint. L3 and L4 are my biggest movers. Consistent quality across all units I've stocked."

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Shin Hye-rin, Kubota Owner, Gyeonggi-do (early 2025)

"My Kubota B2650 came with a lemon-profile shaft from the factory. When it wore out, I replaced it with the L2 from Ever-Power. Exact dimensional match. The metric 8-spline yoke slid on with no play. Saves me the hassle of ordering from the Kubota dealer."

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Jeong Tae-hyun, Livestock Farm, Jeju-do (mid 2024)

"L5 with SFF friction clutch for a round baler. The slip clutch has saved the baler gearbox at least three times when wet grass packed the chamber too tight. The L-series lemon tubes are holding up well even with the heavy baling work. Good investment."

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Han Do-yeon, Agricultural Machinery Repair, Suwon (fall 2024)

"I've shortened a few L-series shafts for customers with tight setups. The lemon tube cuts cleanly with a bandsaw and the profile remains true as long as you clamp it properly. Much easier than trying to cut star tubes. Individual replacement parts are available which makes my repair work straightforward."

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