Kanzaki transmission 21:1. This is the introduction of KMH40A. (formerly known as Yanmar Diesel. So I am not sure what model you are talking about. 00 shipping. Repairing the tranny solved the issue in my case. Oct 31, 2024 · This is the introduction of Piston Motors. However in certain situations the transmission efficiency and maneuverability in changing speed are mutually Transmission. An old salt suggested I try draining the oil and putting in kerosene or acetone to de-glaze it. Our owner's manual says to use engine oil, but the service manual says ATF. 14 2. The mechanic drew a small amount of fluid from the transmission. They are both 35 years old, have ~1800 hrs, and have been babied all their lives (by previous owner and now by me) About a year ago the Find many great new & used options and get the best deals for Yanmar 3GM30F 27 HP Marine Diesel Engine Kanzaki Transmission at the best online prices at eBay! Free shipping for many products! This is the introduction of HST KH-24. 3. This is the introduction of IHT Transaxle K58. The boat needed a new shaft and the motor mounts replaced so I had the prior owner motor it to a yard up the Miami river. Hey Mike, I have the Kanzaki transmission as well. Kanzaki Transmission . 2 days ago · Larger Transmission For Increased Productivity The X300 Select Series transmission provides 165 lb-ft of torque and the D100 series models produces 126 lb-ft of torque which is about 25% increase. With factories in North America, Europe, and around the world, Kanzaki powers a variety of watercraft, including fishing boats and pleasure crafts, both hydraulic and mechanical, with a selection of Dec 2, 2024 · This is the introduction of HST KHS-13. Hi everyone, I am presently located in Grenada, my 1989 Yanmar 4JHBE has a Kanzaki KWB20 transmission which is showing signs of corrosion at the transmission oil cooler elbow. Jul 11, 2024 · This is the introduction of IHT Transaxle K664. I was also confused by the different oil spec in the manuals. The transmission was a Kanzaki KBW10. It is a Kanzaki Tuff Torq Model KBW20-1 coupled to a 56HP Yanmar. (Refurbished) Cone clutch is glazed, and I know I'm in for a rebuild over the winter, but just trying to make it through the rest of the season (mid-November). An observation now that I am in the water. P525DX with cabin A high-capacity diesel-powered front mower with factory assembled cabin, offering unbeatable manoeuvrability and productivity in complex and narrow environments as well as in larger-sized areas all year round. Nov 26, 2012 · Kanzaki KM3A transmission rebuild. Does not come with any TRANSMISSION KM4A-2 (Mechanical Clutch) SPECIFICATIONS MODEL KM4A-2 Clutch Type Mechanical angle servo cone Input torque capacity Nm (ft lb) (max. The plug/dip stick has a mark at the tip which indicates full, This is the introduction of Piston pump series KPS. I have a Yanmar 4JH2-TE Engine and a Kanzaki KM4A Transmission. Thread starter crystal_blue; Start date Apr 13, 2009; C. However, some specification tables indicate this is a compatible gear; whereas, others indicate that the 4JH3E requires a KM35P-4 transmission. Gear Ratio 6. Some where in a workshop or garden shed there is a YP-7M transmission hiding waiting for a new purpose In life! My quest is to find these parts to complete my rebuild. Last one. Hi everyone, Recently bought a 2003 Jeanneau 37' sailboat, has a Yanmar 3GM30F motor with a Kanzaki KM2P transmission. 21 Compatible with en Maintenance products Yanmar Gear Oil 1 Liter Yanmar SAE30 gear oil 1 Liter Dec 2, 2024 · This is the introduction of Frontaxle. This is the text: Transmission Oil Level Check screw it in. The Yanmar shows only 420 hours on the meter. Which means what? Monograde either 20W or 30W? Or 20W-30 multigrade? Which I don't think I've ever seen. Leaking fluid seems to be a problem with the Kanzaki. Thread starter john Gonzalez; Start date Apr 27, 2020; john Gonzalez Member. KANZAKI products are uniquely designed to transmit the limited engine power in a vehicle to the wheels and work implements. I have a 1999 anmar KanZaki transmission and right on the dipstick it say ATF A. The sound is like that of those Mexican percussion instruments that are shaken. is a Japanese marine transmission company, founded in 1947 and now a wholly owned as a subsidiary of Yanmar Company Limited. item 7 YANMAR Kanzaki Jun 22, 2020 · I have a Kanzaki KTM10M front transmission on my 4wd lawn mower. This document is a service manual for the Kanzaki KM3P marine transmission This is the introduction of HST. New Yanmar KM2P-1 marine transmission. You can be as gentle as you want - the plastic cap usually breaks when you are trying to remove it not when you are tightening it. This is the introduction of IHT Transaxle K46. FYI - Chief Engineer won't be able to help you out. I think they are called maracas and have the sound of dry rice inside. Dec 2, 2024 · This is the introduction of KMH50V. Transmission Service. Clatter at low speed (forward) is indeed an indication of a worn clutch. Featuring a Kanzaki K72A hydrostatic transmission, this tractor provides infinite gears, enabling seamless speed adjustments. tries to solve the problems of our customers I currently have access to a Kanzaki KM35P transmission. This is the introduction of Transaxle. This is the introduction of IHT - KANZAKI Technology Leading Industry Share. M. Hi Jeff, our 4JH2-TE and Kanzaki transmission is likely similar to yours. This is the introduction of KM2P-1. The ID plate says KH18. In later years, Kanzaki increased its production range to include power tillers, tractors, rice planters, transmission systems, and similar equipment. Since then I did find the name plate on the Kanzaki (V drive transmission) that says use 15-30 wt. Oct 31, 2024 · This is the introduction of HST MT-23. . Kanzaki began as a producer of gears and other accessories for marine vessels. , Ltd. Thread starter markwbird; Start date Jul 15, 2018; Forums. was established in Nagasu, Amagasaki by Magokichi Yamaoka, the founder of Yanmar Co. 00 Add to cart; Marine Gear Capitol Gears Boat Transmission HE-10200 $ 5,100. So I deferred to the manufacturer's identification plate. Kanzaki Go, Ltd. The hydrostatic transmission enhances maneuverability Oct 31, 2024 · This is the introduction of HMT KC-80HAA. When the engine is running, even in neutral, the bearings and gears are lubricated by the lower gears dipping into the oil in the bottom of the transmission case and moving a small amount of oil up to the top gears and bearings. My 84 Hunter 34 with the 3GM30F engine has the Kanzaki transmission as per attached pix. item 7 YANMAR 2GM20F w/ Kanzaki KM2-A Transmission Marine Diesel Engine motor 18HP 2GMF YANMAR 2GM20F w/ Kanzaki KM2-A Transmission Marine Diesel Engine motor 18HP 2GMF. 63 Reverse 1. Boat is in Miami. Location: 6300 Estate Frydenhoj, St. I have now disassembled the whole unit but can't really understand how this unit ever has been working. On my transmission I changed oil using a 40 WT as this is what a Yanmar dealer told me to use. 21 by 3. 00 Add to cart; Twin Disc , MG-509 , 1. tries to solve the problems of our customers Feb 25, 2023 · I'm wondering if anyone can suggest what might be causing a high pitch noise originating from my Kanzaki Kmp35P transmission: The noise has always been there but has steadily got louder and I can no longer ignore it. (866) 954-2676 or (949) 642-6800 EngineSales@boatswainslocker. 06 and multiply the result by 3800. $3,835. This powerful unit has am trying to track down a new noise emanating from my engine compartment. Pay a little more upfront for a Tuff Torq TL-200, and you’ll likely be This is the introduction of for marine. I've got a Kanzaki-Carl Hurth tranny model KBW10E on my Yanmar 3HM35F with what appears to be worn clutch discs. This increase in torque allows the X300 lawn tractor to climb hills better, tow more weight, and push more snow. This is the introduction of IHT Transaxle K66. 2008 2 MB file. And it is a bit confusing about the dip stick. KANZAKI marine transmissions are custom built and engineered to couple with all YANMAR marine engines, eliminating adapters or spacers to provide the most This is the introduction of IHT Transaxle K-series. I've done this same thing! There's no need to tighten it more than with light fingers. $619. However, some specification tables indicate this is a compatible gear; whereas, others indicate that the 4JH3E requires a KM35P-4 Yanmar Marine Gear, Transmission: 303910 KM, KBW, KMH Yanmar Marine Gear KM3P, KM3A, KM4A, KBW20, KBW21, KMH4A Service Manual 303920 KM35A-35P Yanmar Marine Gear KM35A-35P Service Manual 303930 KM Yanmar Marine Gear KM2P-1, KM35A, KM35A2, KM35P, KM4A, KM5A Service Manual 303940 Jun 13, 2009 · The Kanzaki KM2P-1, the KM2A and KM3A specifically are cone clutch transmissions and do not have oil pumps in them. 10 yr old Yanmar 1Gm10 w/ Kanzaki KM2P transmission. The machine's compact size and high transport speed makes it suitable both for stationary and mobile application for municipalities, contractors, Aug 3, 2014 · FWIW, our Kanzaki transmission takes ATF according to the plate that was placed by the manufacturer on the bell housing that connects to the 4JH2-TE engine. The PO had put engine oil in the Kanzaki by mistake. July 2006 < 1 MB file. Nov 26, 2012 1,654 C&C 40-2 Berkeley Jul 15, 2018 #1 The Dec 2, 2024 · This is the introduction of HST KHS-18. 00 Add to cart; Kanzaki May 11, 2016 · Hey Mike, I have the Kanzaki transmission as well. Kanzaki leads the transmission industry in technical aptitude, global readiness and innovation development. Oct 15, 2010 · I think the D stands for direct sea water cooling where a 3gmF stands for fresh water cooling. Almost all Yanmar transmissions are built by Kanzaki. I am looking for Kanzaki km5a 2. And the level is checked with the stick inserted but not screwd in. The engine is a 1978 Yanmar 3qm30 with a bolted on Kanzaki transmission. Been in the water a few months now. rpm) 214 Nm (157 ft lb) (3800 rpm) Reduction ratio Forward 1. In neutral I can rev the engine to high RPM's when I put it into gear and throttle forward it barely goes up to 600 RPM's. Ask All Sailors. Kanzaki leads the transmission industry in Almost all "Yanmar transmissions" are built by Kanzaki. Sponsored. A mechanic recommended by the broker inspected the drive train last week and determined that the transmission is shot. 63 Direction of rotation Input shaft Counter-clockwise (viewed from stern) Output shaft Clockwise and Kanzaki leads the industry in technical aptitude, global readiness and innovation. With the boat at rest in the water and the engine off, unscrew the dipstick (Figure 39 Well, as you can imagine, the noise is still there. K574 Manufacturer ID: K574. If you know where a Kanzaki YP-7M transmission is hiding ,please give me a shout ! Fair Winds This is the introduction of Piston Pump. Forums for All Owners. They may notice on the dipstick or in the owner's manual that the car requires an automatic transmission fluid, called Type A, that is no longer This is the introduction of Hydraulic motor unit for Lawn Mower KTM10. And the oil is hard to see on the stick. Find many great new & used options and get the best deals for John Deere 14SB Tuff Torq Kanzaki Transmission (AM125473) at the best online prices at eBay! Free shipping for many products! Dec 2, 2024 · This is the introduction of HST MT-30UE. 45:1 , Transmission / Gearbox $ 5,300. Kanzaki has earned an excellent reputation for developing the best products to support a wide range KANZAKI products are uniquely designed to transmit the limited engine power in a vehicle to the wheels and work implements. tries to solve the Hydraulic Equipments,Transmissions and Marine Gears IHT Transaxle series K (K46, K57, K58, K62, K66, K72) Small IHT (Integrated Hydrostatic Transaxle) KANZAKI marine transmissions are custom built and engineered to couple with all YANMAR marine engines, eliminating adapters or spacers to provide the most efficient, balanced, HSTs are closed-circuit power transmission mechanisms made up of a hydraulic axial piston pump and hydraulic axial piston motor. The K58 is the next step up into the work tractor applications. The 'Chief' made the post in 2008 and has since passed. Condition: Used. The sound is like that of This is the introduction of KMH61A. 13 watchers. However in certain situations the transmission efficiency and maneuverability in changing speed are mutually Marinedieselbasics. Dec 2, 2024 · This is the introduction of HST (Middle Size). 5 1 Marine Boat Transmission V-drive Hurth Hsw630v 3312003207 ZF 68A 1. Does not come with any Re: KM2P-1 Kanzaki Transmission RPM Question Post by kens » Fri Jul 29, 2022 1:56 am Roberta wrote: ↑ Thu Jul 28, 2022 10:23 pm Divide 2. We were able to use a line from the Kanzaki was founded by Magokichi Yamaoka, the founder of the Yanmar, in 1947 and started producing marine transmissions in 1948. The engine is a Yanmar 3HM35F. Dec 2, 2024 · This is the introduction of Piston Motor KTM10. A search for the clutch friction discs (part # 177090-03080, 8 needed) shows they're made of almost pure unobtainium, the steel discs (6) not so much. This power unit has all the features and performance of much larger and more expensive transaxles, all Kanzaki KM3A transmission rebuild. The plug/dip stick has a mark at the tip which indicates full, and should be measured by placing the plug on top of the case rather than screwing it in Apr 24, 2006 · Is it possible to pull transmission (Kanzaki KM2A - attached to Yanmar 2GM) in water or is it necessary to haul out to drop shaft, etc? The transmission (for the 3qm30) is not unmanageably heavy but it was very awkward with the large bell housing and poor leverage angles available in the engine room(box). 1983: This is the introduction of IHT Transaxle K57. Dec 30, 2014 · In my quest to find and procure the correct gear, I have come across volumes of erroneous/conflicting information regarding "compatible" Kanzaki gears. ZF63 R:1. FWIW my original KBW10 Hurth Kanzaki transmission, circa 1977, specified ATF or SAE20/30 . Dec 2, 2024 · This is the introduction of Hydraulic motor unit for Lawn Mower KTM10. But maybe this is not right. This is the introduction of Integrated Hydrostatic Transaxle TZT series. I have a complete SolidNav electric drive I can drop in, which is my current plan unless I can find a transmission for a reasonable price. I eliminated the driplesss stern gland - I greased it and burped it, there's no air trapped. pdf), Text File (. I'm unsure as to whether the "-4" indicates some type of adapter plate or another condition. Nov 11, 2024 · ZF 68iv (63iv) 1. Pre-Owned. Through our unique semi-automated production process, we are able to improve product performance and precision through the harmony of automated Dec 2, 2024 · This is the introduction of HST HT-38UM. 62:1. It happened to me twice, once I caught t before any damage was done, the second time it failed the day after I went through the East River in NYC when it suffered a catastrophic failure and seized. For additional information including pricing and availability, please contact our Engine department. regards Brett links below refer to my problem in detail J/30 Rhapsody #348: Transmission Disassembly & Clutch Resurface Kanzaki cone issues This is the introduction of IHT Transaxle K46. I'm pretty sure the problem is corrosion/pitting on the aluminum housing as the elbow itself is bronze I hope this photo of the particular unit I have will attach to the thread Dec 2, 2024 · This is the introduction of Hydraulic Valve ETV-2B. This is the introduction of Hydraulic Front Wheel Drive KXH7N. This is the introduction of KMH50V. Still light and compact for easy integration in most projects, the K58 is packed with upgraded materials and unique features to make it the most So, that leaves me stuck with a sailboat with no transmission. tries to solve the The commercial graded transmission gives uncompromised traction and slope stability. Check the transmission oil level on a weekly basis. Our Hydraulic Equipment, Transmissions, or Marine Gears are the best choice to power any mower, agricultural machinery or Boat. Read More. $360. Apr 13, 2009 #1 "Hi, my name is Gary. 56 1 Marine Boat Transmission Gearbox 63A Hurth HSW630A 3312001202 Coupling Shaft Marine for Velvet Drive 71 72 Borg Warner Hurth ZF 5 X 1. Thomas, USVI View in Google Maps. 07 gear transmissions. 1977: Started production of compact tractors. Attachment 146515 I think I have always used the same oil as I use in the engine-- 15W-40. Re: Source for Kanzaki Transmission Parts The plastic caps on the Yanmar dipsticks seem to fail due to the interaction of the the oil and the cap combined with too much in and out. 5 Nov 2, 2023 · This is the introduction of HST (large size). 00 +$695. So while it didn’t destroy it fast, it ultimately did wreck it. markwbird. It may be prudent to consider replacing the transmission rather than rebuilding it. 95 20% off. Dec 2, 2024 · Main Transmission Sub Transmission: HST 3 speeds (Constant Mesh) HST: Turning "Full-Time Driving System" (The Crawler Vehicle To Turn Smoothly While Moving) Parking Brake System: Wet Multiple: Rated Input Apr 5, 2016 · Hi Jeff, our 4JH2-TE and Kanzaki transmission is likely similar to yours. tries to Apr 13, 2009 · Kanzaki transmission KM5A rebuild or replace. ) Started production of transmission for Yanmar tractors. Oct 11, 2024 · This is the introduction of IHT Transaxle TZT and TZ Series. 51 Pair Marine Transmission $ 4,900. The mac 6 days ago · This transmission has the reputation of being bulletproof and often outlives the motor. 2090andy (3,564) 100%. The K46 is the most popular integrated hydrostatic transaxle (IHT) in the worldand for good reason. Neutral, forward, and reverse traveling can be selected by a single lever, with continuously KANZAKI marine transmissions are custom built and engineered to couple with all YANMAR marine engines, eliminating adapters or spacers to provide the most efficient, balanced, lightweight, and compact propulsion package. You have the round stick which is a hollow tube with a single mark very near the end, correct? Well, that mark is the full line. I have to go into neutral and then forward several times and then when it grabs it goesfast! This is an intermittent problem. Part Information: Kanzaki Transmission. Dec 27, 2024 · Kanzaki KM3A Transmission Ratio 1:3. Pull out the dipstick and read the oil level on the dipstick. Comes painted Yanmar gray. 62 KM2A KM2P KM3P KM3A 2GM 3GM YANMAR / Kanzaki KM2-A Transmission Gear Ratio 2. Kanzaki provides reliable products that offer unrivaled performance at an affordable price. and I replaced that with a slightly newer (circa 1986), but same make & model transmission. Most 3GM30 engine have either the KM3P or the KM3A transmission. Yanmar 3YM30 motor. Co. K58 Manufacturer ID: K58. Either transmission will give reliable service if maintained properly. tries to solve the problems of our customers globally. KANZAKI MARINE TRANSMISSION KM3P MOUNTING FLANGE OEM. WHAT IS “TYPE A” TRANSMISSION FLUID? Posted on 6/12/2017 This is a question often asked of one of our transmission experts in San Diego by a customer who is interested in buying or working on a vintage car. Opens in a new window or tab. Terms Of The Sale: This sale is strictly on an “as Dec 2, 2024 · This is the introduction of IHT Transaxle TZT Series. Ever since Kanzaki was founded, we have worked as part of the Yanmar Group to develop innovative products based on the core technologies of Machine tools, gears, and hydraulics. 1972: Started production of rice planters. 47 2. Was originally installed onto a Yanmar engine and removed by the factory. Model KM4. Dec 2, 2024 · This is the introduction of HST LT-17ZA. , (Hydrostatic Transmission) and This is the introduction of Piston Motor. I am loo "Hi, my name is Gary. This is the introduction of IHT Transaxle K574. tries to solve the problems of our customers Kanzaki KokyuKoki Mfg. I currently have access to a Kanzaki KM35P transmission. Work was done yesterday and I started to motor it out of the river and while waiting for one of the bridges This is the introduction of Transaxle K92. Buy It Now. They contain the detailed information necessary for safe operation, New Yanmar KM2P-1 marine transmission. Transmission and Drive System. 62 KM2A KM2P KM3P KM3A 2GM 3GM. The TL-200 simply outshines the K46 when it comes to heavy-duty performance and longevity. Operation Manual TTM Series – Tuff Torq by Kanzaki TTM60A TTM61A TTM61V 46 pages publ. Tuff Torq TTM60 marine transmission Operation Manual. Dec 2, 2024 · This is the introduction of HST HT-52. I don't know weather I should be looking for rebuild kits. 00. The commercial graded transmission gives uncompromised traction and slope stability. it specified ATF only. Gear ratio is 2. This is the introduction of Hydraulic Equipments,Transmissions and Marine Gears. tries to solve the problems of our Dec 2, 2024 · We at Kanzaki are committed to delivering quality products on time. This transmission has the reputation of being bulletproof and often outlives the motor. 21 Kanzaki KM3A Transmission with ratio 1:3. Dec 2, 2024 · This is the introduction of HST(For mid duty)LT-17,ST-23,MT-23,HT-23. At the picture below I have marked the parts that I don't really understand. These drive systems have been engineered from the ground up for the demands of heavier and more function-rich mower and Re: Care and Feeding of a Kanzaki Transmission Got a buddy rebuilding his kanzaki right now from leaving it in reverse while sailing over 14+ years. I bought it knowing that the front transmission wasn't working for some reason. This is the introduction of KM4A-2. tries to solve the Dec 2, 2024 · This is the introduction of KM35P. Free shipping. Apr 27, 2020 #1 Had the transmission pulled from the engine to replace input and output shaft seals during the refit. Nov 26, 2012 1,654 C&C 40-2 Berkeley Jul 15, 2018 #1 The This is the introduction of KMH50A. If you know where a Kanzaki YP-7M transmission is hiding ,please give me a shout ! Jul 23, 2024 · This is the introduction of HST(For heavy duty)MT-30,MT-38,HT-30,HT-38,HT-42,HT-52. tries to solve the problems of our customers The manual I just downloaded was for a ton of different Kanzaki transmissions. The maintenance manual indicates SAE 30 weight oil. I have two that have quit. Jun 10, 2020 · So, that leaves me stuck with a sailboat with no transmission. Our marine transmission department specializes in sales, repair, and remanufacturing of Velvet Drive, Borg Warner, ZF Marine, Hurth, Paragon, Walters, Pleasurecraft, Twin Disc, Volvo Penta, Yanmar, and yanmar KM3P4 Tuff Torq Kanzaki Transmission gearbox clutch 4JH3E 3JH3E marine. If your application needs a transaxle that can support good performance and 4WD technology, or calls for secondary hydraulic support, the K574 may be just what you’re looking for. 96. This is the introduction of IHT Transaxle K62. Dec 2, 2024 · This is the introduction of others. Ours takes ATF as the ID plate states (mounted on bell housing). This is the introduction of Hydraulic Front Wheel Drive KXH Series. K46 Manufacturer ID: K46. On mine it happened up to 1400 RPM and disappeared upwards of that. The cheapest I can find one is $2k, with the average being $3500. item 7 YANMAR Kanzaki Kanzaki transmission KM5A rebuild or replace. crystal_blue New member. com. This is the introduction of Piston Pumps. May 23, 2024 · This is the introduction of Hydraulic Front Wheel Drive KXH Series. Was: $899. item 6 YANMAR / Kanzaki KM2-A Transmission Gear Ratio 2. Manufactured by Kanzaki in Japan. The ID plate for the trans is attached. Thanks to advanced technology and high quality, Kanzaki leads the transmission industry in technical aptitude, global readiness and innovation development. I have a Kanzaki/Hurth KBW10 Transmission, mated to a 2QM20 Yanmar. What oil should be used in the Kanzaki KM4A gearbox used by many Yanmar engines? The data plate say "20/30 HD". com-Yanmar Kanzaki KM3P Marine Transmission Service Manual - Free download as PDF File (. (866 Dec 2, 2024 · This is the introduction of Wheel motor series KWM. 1. $719. I This is the introduction of HST HT-42. This is the introduction of KMH61V. The John Deere x540 tractor boasts a Transmission and Drive System that is vital for ensuring a smooth operation and high-performance. May 29, 2018 · I just set out to change the transmission oil in my sailboat. Does not come with any This is the introduction of KM35A-2. In the field of gears, hydraulic equipments, transmissions, marine gears and mashine tools ,Kanzaki Kokyukoki Mfg. Kanzaki Transmissions. I have been advised to keep my 30wt oil level for my Kanzaki transmission at the mark that appears bout 1/4" from the bottom of the probe This is the introduction of Transaxle K series. By Dennison | October 29, 2018. I really do NOT want to remove the transmission and dismantle it if at all possible, although now that I am home from my travels I have an acceptable workshop as a last resort. Owner and Workshop Manuals are important documents that should be part of every vessel's library. txt) or read online for free. K66 Manufacturer ID: The K66 is not just an upgraded version of our popular Residential series of transaxles. Apr 27, 2020 · Kanzaki Transmission to Yanmar. I am trying to track down a new noise emanating from my engine compartment. Drawing 4JH4HTE with KM4A2 Kanzaki transmission 1 page publ. Reverse is fine, but very little shaft rotation in forward gear. In 1955, the company invented a gear shaving machine that became very popular in Japan. hyz xwpvou qyxlbvr hdq xoad ssuoav xxjoy qno ujcac ovt