{"id":977,"date":"2026-06-01T08:10:50","date_gmt":"2026-06-01T08:10:50","guid":{"rendered":"https:\/\/automatictransmissionpart.com\/?post_type=product&p=977"},"modified":"2026-06-01T08:10:50","modified_gmt":"2026-06-01T08:10:50","slug":"ep-guko1-28-series-komatsui-universal-joint","status":"publish","type":"product","link":"https:\/\/automatictransmissionpart.com\/id\/produk\/ep-guko1-28-series-komatsui-universal-joint\/","title":{"rendered":"Sambungan Universal KOMATSUI Seri EP-GUKO1-28"},"content":{"rendered":"
\n
\n

U-JOINT Series \u2014 Heavy-Duty Drive Line Components<\/p>\n

KOMATSUI Universal Joint \u2014 GUKO Series (GUKO-1 to GUKO-28)<\/h2>\n

OEM-compatible replacement universal joints engineered for Komatsu construction equipment and heavy machinery. Covering the complete GUKO-1 through GUKO-28 range with verified OEM reference numbers and dimensional specifications.<\/p>\n

KOMATSUI GUKO Universal Joint<\/span>
\nFIG: G \/ A<\/span>
\nD: 33.32\u201371.44 mm<\/span>
\nReferensi Silang OEM<\/span><\/div>\n<\/div>\n<\/div>\n
<\/div>\n
<\/div>\n
\n
\n

1. KOMATSUI Universal Joint Technical Specifications<\/h2>\n<\/div>\n

The table below covers the full GUKO-1 through GUKO-28 model range with verified OEM reference numbers and key dimensional data. Column definitions: FIG = figure type (cross-section geometry), GMB = manufacturer part number, OEM = original equipment manufacturer reference, D mm = journal\/trunnion diameter (R = round bearing configuration), O mm = outer dimension where applicable, L mm = overall assembled length (P = pin-to-pin measurement). All dimensions in millimeters.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
ARA<\/th>\nGMB \/ Part No.<\/th>\nOEM Reference<\/th>\nD (mm)<\/th>\nO (mm)<\/th>\nL (mm)<\/th>\n<\/tr>\n<\/thead>\n
G<\/td>\nGUKO-1<\/td>\n101-10-17100<\/td>\n(R)33.32<\/td>\n\u2014<\/td>\n(P)79.22<\/td>\n<\/tr>\n
G<\/td>\nGUKO-2<\/td>\n101-10-17200<\/td>\n(R)33.32<\/td>\n\u2014<\/td>\n(P)79.22<\/td>\n<\/tr>\n
G<\/td>\nGUKO-4<\/td>\n111-10-16110<\/td>\n(R)36.4<\/td>\n\u2014<\/td>\n(P)107.98<\/td>\n<\/tr>\n
G<\/td>\nGUKO-5<\/td>\n131-10-46100<\/td>\n(R)42.88<\/td>\n\u2014<\/td>\n(P)115.05<\/td>\n<\/tr>\n
G<\/td>\nGUKO-6<\/td>\n135-14-00030<\/td>\n(R)42.88<\/td>\n\u2014<\/td>\n(P)140.45<\/td>\n<\/tr>\n
G<\/td>\nGUKO-8<\/td>\n175-20-00060<\/td>\n(R)71.44<\/td>\n\u2014<\/td>\n(P)165.01<\/td>\n<\/tr>\n
G<\/td>\nGUKO-11<\/td>\n150-11-00097<\/td>\n40\/(R)50<\/td>\n\u2014<\/td>\n204.2\/208<\/td>\n<\/tr>\n
G<\/td>\nGUKO-12<\/td>\n111-60-11110<\/td>\n(R)33.32<\/td>\n\u2014<\/td>\n(P)79.22<\/td>\n<\/tr>\n
A<\/td>\nGUKO-13<\/td>\n154-66-12100<\/td>\n23.82<\/td>\n\u2014<\/td>\n61.3<\/td>\n<\/tr>\n
G<\/td>\nGUKO-15<\/td>\n380-136142-1<\/td>\n(R)49.20<\/td>\n\u2014<\/td>\n(P)148.38<\/td>\n<\/tr>\n
G<\/td>\nGUKO-16<\/td>\n380-154073-1<\/td>\n(R)38.91<\/td>\n\u2014<\/td>\n109.4<\/td>\n<\/tr>\n
G<\/td>\nGUKO-17<\/td>\n380-154081-1<\/td>\n30.18<\/td>\n\u2014<\/td>\n92.5<\/td>\n<\/tr>\n
G<\/td>\nGUKO-18<\/td>\n380-890373-1<\/td>\n(R)42.88<\/td>\n\u2014<\/td>\n(P)115.05<\/td>\n<\/tr>\n
G<\/td>\nGUKO-19<\/td>\n381-881908-1<\/td>\n(R)42.88<\/td>\n\u2014<\/td>\n(P)115.05<\/td>\n<\/tr>\n
G<\/td>\nGUKO-20<\/td>\n381-972625-1<\/td>\n(R)36.40<\/td>\n\u2014<\/td>\n(P)107.98<\/td>\n<\/tr>\n
G<\/td>\nGUKO-22<\/td>\n381-976908-1<\/td>\n(R)42.88<\/td>\n\u2014<\/td>\n(P)140.45<\/td>\n<\/tr>\n
G<\/td>\nGUKO-23<\/td>\n381-985204-1<\/td>\n(R)36.40<\/td>\n\u2014<\/td>\n(P)107.98<\/td>\n<\/tr>\n
G<\/td>\nGUKO-25<\/td>\n385-10178551<\/td>\n(R)36.40<\/td>\n\u2014<\/td>\n(P)107.98<\/td>\n<\/tr>\n
G<\/td>\nGUKO-26<\/td>\n385-10178571<\/td>\n(R)42.88<\/td>\n\u2014<\/td>\n(P)140.45<\/td>\n<\/tr>\n
G<\/td>\nGUKO-27<\/td>\n385-10193741<\/td>\n(R)49.20<\/td>\n\u2014<\/td>\n(P)148.38<\/td>\n<\/tr>\n
G<\/td>\nGUKO-28<\/td>\n385-10238601<\/td>\n(R)42.88<\/td>\n\u2014<\/td>\n(P)140.45<\/td>\n<\/tr>\n
G<\/td>\n\u2014<\/td>\n423-20-12620<\/td>\n41.3\/(R)49.2<\/td>\n\u2014<\/td>\n104.5\/148.4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Notes: (R) = round bearing cup journal. (P) = pin-to-pin length measurement. Dual values (e.g. 204.2\/208) indicate two variants within the same OEM reference. All measurements in millimeters.<\/p>\n<\/div>\n

\"automatictransmissionpart-products-EP-GUKO1-28<\/p>\n

\n
\n
\n

2. What Is a Universal Joint?<\/h2>\n<\/div>\n

A universal joint \u2014 commonly shortened to U-joint \u2014 is a mechanical coupling that connects two shafts whose axes are not in perfect alignment with each other. It allows rotational motion and torque to be transmitted between shafts that meet at an angle, which may itself vary during operation. This is the core function that makes the universal joint indispensable in drivetrain engineering: without it, a vehicle’s powertrain could not accommodate the continuous suspension movement, steering deflection, and chassis flex that occur during normal operation. In heavy construction equipment, trucks, and industrial machinery, the universal joint in a driveshaft assembly absorbs angular misalignment between the engine\/gearbox output and the driven axle, maintaining power transfer through terrain changes and load shifts that would otherwise break a rigid shaft connection.<\/p>\n

The KOMATSUI Universal Joint series \u2014 specifically the GUKO range covered on this page \u2014 addresses the demanding replacement and OEM-supply needs of Komatsu construction machinery operators and fleet maintenance professionals. Each unit in the GUKO-1 through GUKO-28 lineup is dimensioned and referenced to correspond precisely with original Komatsu OEM part numbers, making the komatsu universal joint replacement process straightforward for maintenance workshops in Colombia and across Latin America. Whether you are servicing a Komatsu bulldozer, excavator, motor grader, or wheel loader, finding the correct KOMATSUI GUKO Universal joint specification from the table below eliminates the guesswork typically associated with cross-referencing aftermarket components.<\/p>\n<\/div>\n

\n
\n

3. Five Key Advantages of the KOMATSUI Universal joint<\/h2>\n<\/div>\n
\n
\n

1. Verified OEM Cross-Reference Compatibility<\/p>\n

Every model in the GUKO KOMATSUI Universal joint series carries a confirmed OEM part number corresponding to original Komatsu equipment specifications. This direct komatsu universal joint replacement compatibility means service engineers can order with confidence, knowing the unit will fit without modification. The OEM cross-reference system also streamlines procurement for Colombian fleet managers sourcing parts for mixed-brand equipment parks.<\/p>\n<\/div>\n

\n

2. Wide Coverage from GUKO-1 to GUKO-28<\/p>\n

The GUKO KOMATSUI Universal joint range spans a broad spectrum of Komatsu equipment models, covering journal diameters from 23.82 mm (GUKO-13) up to 71.44 mm (GUKO-8) and overall lengths from 61.3 mm to over 208 mm. This breadth in a single standardized KOMATSUI GUKO Universal joint series allows a single supplier to cover the majority of Komatsu driveline universal joint needs, reducing the number of separate supplier relationships a maintenance operation needs to manage.<\/p>\n<\/div>\n

\n

3. Heavy-Duty Construction for Demanding Work Cycles<\/p>\n

Construction equipment universal joints experience among the most severe duty cycles in the entire powertrain component industry \u2014 high torque inputs, frequent shock loads during bucket filling and grading operations, continuous vibration from rough terrain, and exposure to water, mud, and abrasive particulate. The GUKO series is manufactured to withstand these conditions through precision machined yokes, hardened needle bearing cups, and high-grade cross assemblies that resist premature wear under heavy load cycling in Colombian mining and infrastructure construction applications.<\/p>\n<\/div>\n

\n

4. Precision Dimensional Tolerances<\/p>\n

Each KOMATSUI GUKO universal joint unit is manufactured to tight dimensional tolerances on journal diameter (D mm), outer diameter (O mm where specified), and overall length (L mm). The use of (R) prefix notation in the D mm column indicates a round-bearing journal dimension \u2014 a critical detail for ensuring proper bearing cup seating and preventing premature failure from misfit. Dimensional accuracy directly affects the balanced rotation of the driveshaft assembly, which in turn determines vibration levels and the service life of connected transmission and axle components.<\/p>\n<\/div>\n

\n

5. Lubrication-Ready Design for Extended Service Intervals<\/p>\n

The grease-zerk-equipped cross assembly in the GUKO series allows field relubrication without full disassembly, enabling preventive maintenance on-site rather than requiring removal to a workshop. In Colombian construction operations where downtime directly translates to project delays and cost overruns, the ability to extend universal joint service intervals through regular greasing during routine equipment maintenance checks is a significant operational advantage over sealed-for-life units that must be replaced at first sign of wear.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\n
\n

4. Prinsip Kerja Sambungan Universal<\/h2>\n<\/div>\n

Understanding the universal joint working principle starts with recognizing the fundamental problem it solves: two shafts that must rotate in synchrony but cannot be perfectly aligned. In a Komatsu wheel loader or bulldozer, for example, the output shaft from the transmission does not sit on exactly the same axis as the differential input shaft at the rear axle. The distance between these components changes as the machine moves, the suspension compresses, or the articulated frame steers. A rigid shaft connection would bind or break under these conditions. The universal joint solves this by interposing a four-point cross-shaped trunnion \u2014 the journal cross \u2014 between two forked yokes that are each attached to one of the shafts.<\/p>\n

As the driving shaft rotates, it pushes on its yoke, which in turn pushes on two of the cross’s trunnion journals. The cross transmits this force through its other two trunnions to the driven yoke and shaft. Because the cross can pivot freely around both pairs of journals simultaneously \u2014 thanks to the needle roller bearing cups pressed onto each trunnion \u2014 it accommodates angular offset between the shafts while maintaining continuous torque transmission. At a constant input speed, a single universal joint actually produces a slight cyclic variation in output speed at angles other than zero; this is the well-known velocity non-uniformity characteristic. In driveshaft applications, this is typically corrected by using two universal joints at opposite phasing, which cancel each other’s velocity error \u2014 a configuration known as a double-cardan or phased driveshaft arrangement, common in heavy universal joint truck applications.<\/p>\n

The KOMATSUI Universal joint in this GUKO series uses the standard Cardan (Hooke’s joint) principle with a four-bearing cup configuration (FIG type G or A as specified per model). The needle rollers inside the bearing cups allow the trunnion to rotate with minimal friction, while the precision machined journal diameter (D mm) and length (L mm) dimensions ensure that the bearing cups seat correctly in the yoke bore, maintaining the radial and axial clearances required for smooth operation and long service life.<\/p>\n<\/div>\n

\n
\n

5. Material Construction of the GUKO Universal Joint<\/h2>\n<\/div>\n

The mechanical reliability of any KOMATSUI Universal joint under sustained heavy-duty service depends fundamentally on the materials used in each component. The journal cross \u2014 the central cross-shaped trunnion that transmits all the torque between the two yokes \u2014 is typically produced from alloy steel with high carbon content (commonly 20CrMnTi or equivalent medium-alloy case-hardening grade). After rough machining, the crosses undergo case carburizing and quenching, which produces a hard, wear-resistant surface layer (typically 58\u201362 HRC) over a tough, shock-absorbing core. This combination of hard surface and tough core is specifically chosen to resist both the abrasive wear at the bearing contact zones and the bending fatigue at the trunnion roots under cyclic torque loading.<\/p>\n

The yoke bodies in construction equipment universal joints \u2014 including those in the GUKO series KOMATSUI Universal joint used on Komatsu machinery \u2014 are generally forged from medium-carbon or alloy steel (AISI 1045 or similar) and subsequently heat treated to appropriate strength levels. Forgings are preferred over castings for yoke bodies because the grain flow from the forging process provides superior fatigue strength in the bore and lug zones, which are the areas most susceptible to fatigue cracking under repeated high-torque reversals. The needle roller bearing cups are manufactured from bearing steel (typically 100Cr6 \/ GCr15 equivalent) through a combination of cold drawing, precision grinding, and through-hardening. Seals are made from synthetic rubber (typically NBR or FKM compound) selected for resistance to grease, road contamination, and the temperature range experienced in heavy equipment powertrains.<\/p>\n<\/div>\n<\/div>\n

\"automatictransmissionpart-products-EP-GUKO1-28<\/p>\n

\n
\n
\n

6. KOMATSUI GUKO Universal Joint Application Scenarios<\/h2>\n<\/div>\n

The GUKO KOMATSUI Universal joint series covers a range of Komatsu construction machinery driveline positions. The following sections describe the most common deployment contexts where these universal joints are specified for replacement or new assembly in Colombian and Latin American construction and mining operations.<\/p>\n

\n
\n

Bulldozer Driveshaft Applications<\/p>\n

Komatsu crawler bulldozers (D37, D51, D65, D155 series and others) use universal joints in their hydraulic pump drive shafts and, in certain models, in their power train connections between the torque converter and bevel gear differential. Models GUKO-8 (D = (R)71.44 mm, L = (P)165.01 mm) and GUKO-11 (D = 40\/(R)50, L = 204.2\/208 mm) represent the heavier-duty, larger-diameter units suitable for these high-torque bulldozer powertrain positions. Colombian mining and land-clearing contractors operating D-series bulldozers in the departments of Antioquia, Cesar, and C\u00f3rdoba will recognize these as the most commonly replaced driveline components after extended service in abrasive soil conditions.<\/p>\n<\/div>\n

\n

Wheel Loader Propeller Shaft Joints<\/p>\n

Articulated wheel loaders (Komatsu WA series) use universal joints at both ends of the propeller shafts connecting the torque converter output to the front and rear axles. The articulating frame joint that allows steering adds a second angular demand on the driveshaft universal joints \u2014 these must operate at a permanent static angle from the frame articulation while also accommodating dynamic suspension movement. Mid-range GUKO models such as GUKO-5 (D = (R)42.88, L = (P)115.05), GUKO-15 (D = (R)49.20, L = (P)148.38), and GUKO-19 (D = (R)42.88, L = (P)115.05) are typical specifications for wheel loader propeller shaft KOMATSUI Universal joint in this power range.<\/p>\n<\/div>\n

\n

Motor Grader Drive Systems<\/p>\n

Komatsu motor graders (GD series) employ universal joints in their tandem drive axle assemblies as well as in the driveshaft connections from the power train to the intermediate and rear axles. Road maintenance and highway construction fleets operating Komatsu GD530, GD655, or GD825 graders in Colombia’s extensive rural road maintenance programs will find the GUKO-4, GUKO-15, and GUKO-16 KOMATSUI Universal joint models relevant for routine service replacement. The steering KOMATSUI Universal joint positions in motor graders are particularly high-wear due to the constant angular cycling of the steering column and tandem axle oscillation.<\/p>\n<\/div>\n

\n

Excavator Hydraulic Pump Drive<\/p>\n

Certain Komatsu excavator models use a universal joint in the connection between the engine flywheel housing and the main hydraulic pump coupling assembly \u2014 a position that sees continuous high-speed rotation with minimal angular deflection but maximum torque. The smaller-diameter GUKO-13 (FIG type A, D = 23.82 mm, L = 61.3 mm) is a compact unit suited to these relatively tight-clearance pump drive positions where overall length is a packaging constraint. Colombia’s rapidly growing infrastructure sector, including bridge, tunnel, and hydroelectric project construction, drives steady demand for excavator universal joint replacement parts.<\/p>\n<\/div>\n

\n

Dump Truck Driveline Service<\/p>\n

Komatsu rigid frame dump trucks (HD325, HD405, HD465 series and similar off-highway haul trucks) operating in Colombian open-pit mines use large-diameter universal joints in their main propeller shafts connecting the transmission to the rear axle. For these applications the GUKO-8 and GUKO-11 KOMATSUI Universal joint represent the appropriate size range. Mining operations in the Cerrej\u00f3n coal region, Drummond operations in Cesar, and Cerro Matoso nickel mine in C\u00f3rdoba operate fleets of heavy haul trucks that require reliable universal joint truck replacement parts as part of their planned preventive maintenance programs.<\/p>\n<\/div>\n

\n

Steering Column Applications<\/p>\n

Several Komatsu equipment models use a universal joint or steering universal joint in the steering column assembly to route the steering input around obstacles in the operator cab area. These steering column universal joint positions experience frequent angular cycling at low torque \u2014 the opposite duty profile from driveshaft universal joints \u2014 but require particularly precise dimensional conformity to avoid steering play or vibration that would affect operator comfort and control precision on long shifts. GUKO-13 and GUKO-17 KOMATSUI Universal joint with their more compact dimensions are candidates for these lighter-duty steering shaft positions.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\n
\n

7. Regulatory Standards and Compliance \u2014 Universal Joints for Construction Equipment<\/h2>\n<\/div>\n

Construction equipment drivetrain components \u2014 including universal joints used in Komatsu machinery serviced in Colombia \u2014 are subject to regulatory and standards frameworks at multiple levels. Colombian operators, importers, and maintenance workshops should be aware of the following compliance requirements:<\/p>\n

Colombia \u2014 SGSST and ICONTEC Standards:<\/strong> Under Colombia’s occupational safety management system (SGSST, established by Resoluci\u00f3n 0312 de 2019), maintenance operations involving drivetrain components must be documented with proper risk assessments for rotating machinery. Workshops performing universal joint replacement on heavy equipment must comply with NTC-ISO 4254 principles for mechanical safety and maintain records of parts used, including OEM reference numbers and supplier documentation. ICONTEC’s adoption of ISO standards for mechanical components means that GUKO series universal joints should be accompanied by dimensional compliance documentation when entering formal procurement processes for large Colombian mining and infrastructure projects.<\/p>\n

European Union \u2014 Machinery Directive 2006\/42\/EC:<\/strong> For EU-origin Komatsu equipment exported to Colombia or maintained by EU-certified service centers, the Machinery Directive requires that replacement parts used in safety-critical powertrain positions (which include driveshaft universal joints) meet the original machine design specifications. Using dimensionally verified OEM-compatible universal joints, as the GUKO series is designed to be, satisfies this requirement and protects the CE marking of the original equipment.<\/p>\n

Standar Internasional ISO:<\/strong> ISO 8994 covers the performance testing and dimensional standards for universal joints (cardan joints) used in power transmission. ISO 3771 and ISO 9969 address related driveshaft component quality requirements. These standards are the internationally recognized framework referenced in procurement specifications for large construction projects in Colombia, Panama, Peru, and other Latin American markets.<\/p>\n

United States \u2014 SAE Standards:<\/strong> SAE J901 (Universal Joint Test Procedure) and SAE J706 (Universal Joints and Driveshafts \u2014 Nomenclature, Performance, and Test Methods) define the testing and rating methodology for heavy-duty universal joints in the North American market. Colombian mining operations managed by North American-headquartered companies (such as Drummond, Glencore Colombia, or AngloGold Ashanti) may reference these SAE standards in their maintenance specifications for replacement universal joint components.<\/p>\n

\n

Import and Customs Compliance in Colombia<\/p>\n

Universal joint components imported into Colombia are classified under HS code 8708.99 (other parts and accessories for motor vehicles) or 8484.10 (mechanical seals) depending on the specific configuration. DIAN customs clearance requires a commercial invoice, packing list, and certificate of origin. Technical inspection under INVIMA or ICONTEC may be required for commercial quantities entering through formal procurement channels for public infrastructure projects under the ANI (Agencia Nacional de Infraestructura) concession framework.<\/p>\n<\/div>\n<\/div>\n

\n
\n

8. Tentang Kami<\/h2>\n<\/div>\n

We are a specialized supplier of precision drivetrain and power transmission components serving industrial buyers, fleet maintenance operations, OEM assemblers, and construction equipment repair workshops across Latin America. Our product range covers universal joints, wheel hub assemblies, axle components, and related automotive and heavy equipment drivetrain hardware \u2014 all sourced from manufacturing facilities operating under documented quality management frameworks aligned to ISO 9001 standards.<\/p>\n

Our team’s expertise covers the complete spectrum of Komatsu equipment universal joint applications \u2014 from compact KOMATSUI Universal joint used in excavator hydraulic pump drives to the large-diameter, high-torque driveshaft joints in heavy haul dump trucks. We support Colombian customers with both standard catalog komatsu universal joint for sale items and technically guided procurement for non-standard applications. Our one-stop supply model means customers can source KOMATSUI GUKO universal joints alongside compatible wheel hub and axle components through a single relationship, simplifying logistics and reducing total procurement cost for equipment fleets.<\/p>\n

Bengkel<\/h3>\n
\n
\"Workshop
\n\"Workshop
\n\"Lantai
\n\"Workshop<\/div>\n<\/div>\n<\/div>\n
\n
\n

9. Produk Terkait \u2014 Solusi Sistem Penggerak Lengkap<\/h2>\n<\/div>\n

A universal joint rarely operates in isolation. For maximum driveline reliability, the universal joint assembly should be paired with compatible wheel hub units and axle components that are dimensionally and dynamically matched to the same equipment. Sourcing these components from a single supplier ensures system compatibility and simplifies the procurement process for Colombian fleet operators and workshop managers.<\/p>\n

\n
\n

Unit Hub Roda<\/p>\n

Our complete range of Wheel Hub assemblies is engineered to work in conjunction with universal joints in the same drivetrain system. Matching hub bearing units ensure that the load path from the universal joint through the axle shaft to the wheel end is properly supported. Proper wheel hub selection prevents secondary failures caused by mismatched bearing preload and axial play that would otherwise accelerate universal joint wear.<\/p>\n

\"Wheel<\/div>\n<\/div>\n
\n

Rakitan Gandar<\/p>\n

We supply a broad selection of Axle components compatible with the same Komatsu equipment lines served by the GUKO universal joint range. One-stop sourcing of universal joints, hub bearings, and axle shafts from a single supplier eliminates interoperability risk and reduces the administrative burden of managing multiple vendor relationships for drivetrain maintenance in Colombian construction and mining fleets.<\/p>\n

\"Rear<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
\n

Pertanyaan yang Sering Diajukan<\/h2>\n<\/div>\n
\nQ1. What is the main function of a universal joint in a Komatsu construction machine operating in Colombian mining conditions?<\/summary>\n

The main function of a universal joint in Komatsu equipment is to transmit rotational torque between two shafts that are not perfectly aligned. In Colombian mining applications \u2014 where equipment operates on uneven terrain, loading ramps, and pit floors \u2014 the driveshaft angles between the transmission and axles change constantly. The KOMATSUI Universal joint absorbs these angular variations without interrupting power delivery, protecting both the transmission and the axle from shock loads that would damage rigid shaft connections.<\/p>\n<\/details>\n

\nQ2. How do I find the correct KOMATSUI GUKO Universal joint for my Komatsu equipment using the OEM part number on the old joint?<\/summary>\n

Cross-reference the OEM part number from your original Komatsu part (stamped on the joint or in the Komatsu parts book) against the OEM Reference column in the specification table on this page. For example, if your part number is 135-14-00030, the corresponding GUKO model is GUKO-6 with D = (R)42.88 mm and L = (P)140.45 mm. If you cannot find the exact number listed, contact our team with the part number and equipment model \u2014 we can confirm the correct KOMATSUI Universal joint GUKO replacement or identify the nearest equivalent.<\/p>\n<\/details>\n

\nQ3. What are the signs that a KOMATSUI GUKO Universal joint on my Komatsu bulldozer needs replacement before it causes driveshaft failure?<\/summary>\n

Common signs include: a clunking or clicking sound during power application or engagement of the drive; vibration that increases with vehicle speed and reduces when the load is released; grease leaking from the bearing cups (indicating seal failure and contamination entry); visible rust, pitting, or axial play in the cross assembly when the driveshaft is manually rocked. Any of these symptoms in Colombian construction equipment should prompt immediate inspection and komatsu universal joint replacement to avoid catastrophic driveshaft failure and equipment downtime.<\/p>\n<\/details>\n

\nQ4. How often should I grease the universal joint on a Komatsu wheel loader operating in the Llanos Orientales region of Colombia?<\/summary>\n

Komatsu’s own service intervals typically recommend greasing driveshaft universal joints every 250\u2013500 operating hours in standard conditions, but Colombian Llanos operations \u2014 with their combination of sandy soil, river crossings, and tropical humidity \u2014 represent aggressive conditions that justify a reduced interval of 125\u2013250 hours. Use the grease type specified in the Komatsu WA series operator manual (typically lithium complex NLGI 2 or equivalent). Consistent lubrication is the single most effective way to extend GUKO universal joint service life in harsh field conditions.<\/p>\n<\/details>\n

\nQ5. Which GUKO model covers the universal joint application for a Komatsu GD655 motor grader operating on a road maintenance contract in Colombia?<\/summary>\n

The Komatsu GD655 typically uses propeller shaft universal joints in the 36\u201343 mm journal diameter range. Based on the OEM reference numbers for that equipment model, GUKO-4 (OEM 111-10-16110, D=(R)36.4), GUKO-18 (OEM 380-890373-1, D=(R)42.88), or GUKO-20 (OEM 381-972625-1, D=(R)36.40) are candidate matches. We recommend confirming the specific Komatsu part number from the GD655 parts book before ordering to ensure the correct GUKO KOMATSUI GUKO Universal joint model is selected for your specific machine serial number range.<\/p>\n<\/details>\n

\nQ6. How does the universal joint working principle differ in steering column applications versus main driveshaft applications in Komatsu equipment?<\/summary>\n

In a main driveshaft, the universal joint operates at relatively low angles (typically 3\u20138\u00b0) but transmits very high torque at continuous rotation, which makes bearing surface fatigue and lubrication the primary failure modes. In a steering column universal joint application, the angular range is much larger (often 15\u201335\u00b0) and the torque is low, but the joint cycles through its full angular range with every steering input, making it susceptible to wear from the high-cycle, high-angle movement. These different duty profiles mean that steering column universal joints and driveshaft universal joints have different recommended inspection intervals despite appearing similar in construction.<\/p>\n<\/details>\n<\/div>\n<\/div>\n

Editor: PXY<\/p>","protected":false},"excerpt":{"rendered":"

\n
EP-GUKO Series Komatsu universal joints are precision-engineered OEM replacements for Komatsu heavy machinery drivelines. Covering GUKO-1 to GUKO-28, they feature specifications including D=23.82\u201349.2mm, O=30.18\u201349.20mm, and L=61.3\u2013204.2\/208mm, matching Komatsu original part numbers exactly.<\/div>\n<\/div>\n
\n
Built for high-torque, heavy-duty applications, these robust universal joints deliver reliable power transfer under harsh conditions. Designed for seamless fit and long service life, they ensure consistent performance and simplified maintenance for Komatsu construction and industrial equipment.<\/div>\n<\/div>","protected":false},"featured_media":978,"template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[65],"product_tag":[],"class_list":["post-977","product","type-product","status-publish","has-post-thumbnail","product_cat-komatsui-series-universal-joint","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/automatictransmissionpart.com\/id\/wp-json\/wp\/v2\/product\/977","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/automatictransmissionpart.com\/id\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/automatictransmissionpart.com\/id\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/automatictransmissionpart.com\/id\/wp-json\/wp\/v2\/media\/978"}],"wp:attachment":[{"href":"https:\/\/automatictransmissionpart.com\/id\/wp-json\/wp\/v2\/media?parent=977"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/automatictransmissionpart.com\/id\/wp-json\/wp\/v2\/product_brand?post=977"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/automatictransmissionpart.com\/id\/wp-json\/wp\/v2\/product_cat?post=977"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/automatictransmissionpart.com\/id\/wp-json\/wp\/v2\/product_tag?post=977"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}