Have you noticed it happening after the hydrostatic is up to temperature more so than when it’s cold at startup? Be worth your time to inspect the belt for glazing and proper diameter as well as the v in the pulleys incase it’s slipping under load. But in the end I have a bad feeling someone dumped it on you guys because their assholes who sell mowers with worn out hydros. This kind of thing happens a lot because when the hydros go they are too expensive to have fixed at a shop vs buying new. Gods speed my friend. Answer from Deleted User on reddit.com
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JustAnswer
justanswer.com › small-engine › 4rnv5-cubcadet-rzt-50-think-its-2005-transmissions.html
Cub Cadet RZT 50 Transmission Rebuild Kit & Parts - Expert Q&A
March 24, 2011 - Transmission slipping in the RZT 50 usually stems from worn hydrostatic pump or motor components. Inspect the hydrostatic drive belt first, then consider rebuilding kits for pumps and motors.
Discussions

Possible hydrostatic transmission problem ?
Have you noticed it happening after the hydrostatic is up to temperature more so than when it’s cold at startup? Be worth your time to inspect the belt for glazing and proper diameter as well as the v in the pulleys incase it’s slipping under load. But in the end I have a bad feeling someone dumped it on you guys because their assholes who sell mowers with worn out hydros. This kind of thing happens a lot because when the hydros go they are too expensive to have fixed at a shop vs buying new. Gods speed my friend. More on reddit.com
🌐 r/smallengines
16
4
July 4, 2022
Picked up a Zero Turn - Cub Cadet 50''. What should I do on this for Maintenance / Worry about?
Congrats. I prefer to use the oem filters on hydros but I'm sure that it isn't necessary as long as it is a quality can. 15 or 20w 50 if think. The oems have good info on their website for changing the oil and purging,Also filter kits with oil etc. I guess try cleaning the carb you have. What could go wrong? More on reddit.com
🌐 r/lawnmowers
16
1
July 17, 2024
Hydrostatic Trans. Fluid Change RZT 50
Hi Everyone, Just completed a fluid change on the hydrostatic transmission on my older model RZT 50. I never did this, so thought it was about time to do so. It was pretty simple so I thought I'd post some pics of what I did. I took info from several of the posts here and videos elsewhere to... More on lawnmowerforum.com
🌐 lawnmowerforum.com
1
July 8, 2016
What secret sauce does Cub Cadet use in their hydrostatic transmissions?
Thanks for posting on r/MechanicAdvice ! This is just a reminder to review the rules . If you are here asking about a second opinion (ie "Is the shop trying to fleece me?"), please read through CJM8515's post on the subject. and remember rule 3a, please post the year/make/model of the vehicle you are working on. If this post is about bodywork, accident damage, paint, dent/ding, questions it belongs in r/AutoBody or r/Diyautobody If you have tire questions check out https://www.reddit.com/r/MechanicAdvice/comments/k9ll55/can_your_tire_be_repaired/ . If you dont have a question and you're just showing off it belongs in r/Justrolledintotheshop This is an automated reply I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns. More on reddit.com
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7
2
October 23, 2021
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TractorByNet
tractorbynet.com › main › cub cadet › cub cadet tractors
Cub cadet RZT 50 hydrostatic transmission - TractorByNet
September 4, 2008 - I just had this same problem with my Z-Force 50 so I pulled the transmissions and changed the oil and so far it seems to have fix it. But I don't know if it was the oil change or just cleaning all the junk off them. The transmission that was acting up had a lot of stuff packed in around the relief lever. Sep 4, 2008 / Cub cadet RZT 50 hydrostatic transmission
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Amazon
amazon.com › CUB-CADET-918-04431B-Transmission-918-04431A › dp › B00CSC1E44
Amazon.com : CUB CADET 918-04431B Transmission RZT 42 50 50VT 22 17 918-04431A 618-04431B : Lawn Mower Pulleys : Patio, Lawn & Garden
OEM CUB CADET Part Number 918-04431B Replaces Prior MPN 918-04431A 918-04431 618-04431B 618-04431A Compatibile With: Cub Cadet: RZT-17, RZT-22, RZT-42, RZT-50 Please Refer to Original Equipment Owners Manual to verify Compatibility
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Reddit
reddit.com › r/smallengines › possible hydrostatic transmission problem ?
r/smallengines on Reddit: Possible hydrostatic transmission problem ?
July 4, 2022 -

so me and my dad recently got a cub cadet rzt 50 with hydrogear zt 2200 zte transmissions on it and I'm not sure if its the slight slope we drive on I feel as if the power going up hill is kinda weak even with the engine at full throttle when turning sometimes not all the time it will barely try to turn till I set the sticks in neutral and then turn then go forward sometimes it will run wide open but its been acting funny again im not sure if this is user error or poor adjustment on the handles but its an on off kinda thing some people I've asked have told me its the filter problem is the filter is inside the transmission housing and I'm good and fixing lawnmowers but not that good has kind and a whine noise when it doesn't want to turn or go forward easy anyway if you guys have any info please do share thanks

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Cub Cadet
cubcadet.com › prior year models › rzt50 cub cadet zero turn mower
Cub Cadet Zero Turn Mower - Model 17BA5A7P709 | Cub Cadet US
Find parts and product manuals for your RZT50 Cub Cadet Zero Turn Mower. Free shipping on parts orders over $45.
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eBay
ebay.com › shop › cub-cadet-hydro-transmission
Cub Cadet Hydro Transmission | eBay
CUB CADET RZT 50 HYDRO RH EZT TRANSMISSION 618-04163A/ ZA-AFBB-3D7B-2DEBOpens in a new window or tab ... 70853 Seal & Retaining Kit for Hydro-Gear Cub Cadet Lawn Mower Transmission, FitOpens in a new window or tab ... Hydro Transmission Filter fits Cub Cadet Pro Z700 900 Tank LZ & SZ 48 54 60Opens in a new window or tab ... Cub Cadet LT1042 Hydro Gear Hydrostatic Transmission 618-04269 / 350-0510Opens in a new window or tab
Find elsewhere
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Garden Tractor Forums
gardentractortalk.com › home › forums › barn › lawn & garden tractors by make › cub cadet tractor forum
Cub Cadet Rzt50 Transmission | Garden Tractor Forums
The LH transmission doesn't put out as much power at the RH so I figure it is the pump. The Transmission is a Hydrogear ZC-DMBB-4DDC-2RPX. I have a parts breakdown on this transmission but no technical data.
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eBay
ebay.com › home & garden › yard, garden & outdoor living › lawn mowers, parts & accessories › lawn mower parts › cub cadet transmission
Cub Cadet Transmission for sale - eBay
Upgrade your Cub Cadet with top-quality transmissions like the Hydro-Gear RH Transaxle or OEM Transmission. Shop now on eBay for the best deals!
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JustAnswer
justanswer.com › small-engine › k85zd-i-ve-older-rzt-50-left-side-transmission-oil.html
RZT 50 Transmission Issues? Expert Troubleshooting Guide
September 22, 2022 - Customer: To address this issue, I replaced the spring on the left side transmission, drained the oil buildup in the left reservoir, re-added the Cub Cadet oil, and more.
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JustAnswer
justanswer.com › small-engine › f6pdc-right-hydrostatic-tranmission-cub-cadet-rzt-mower.html
Cub Cadet RZT L Hydrostatic Transmission Not Working
September 28, 2020 - These modifications do not change the intent or substance of the original messages. ... RZT L often faces hydrostatic transmission failure and uneven drive on one side during operation.
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Reddit
reddit.com › r/lawnmowers › picked up a zero turn - cub cadet 50''. what should i do on this for maintenance / worry about?
r/lawnmowers on Reddit: Picked up a Zero Turn - Cub Cadet 50''. What should I do on this for Maintenance / Worry about?
July 17, 2024 -

Attached a picture to the post. Got this from a friend who was moving. It definitely works as he was using it yesterday morning. 427 hours.

Model is 17AH3AGP709

The deck needs one of the casters welded back on. We had to take the deck off to get it on the trailer. So seems like a good time to sharpen the blades, weld the caster on, check bearings and replace the belt.

I know the hydrostatic transmissions can be a problem. The owners manual says the transmission isn't serviceable. However, it does appear to have a filter on each transmission and the expansion tank. I should be able to pull the filters to drain, replace them and refill via expansion tank with the vents pulled.

Anyone know what I should use for the hydraulic filters?

It does start hard cold and needs to run with choke for a while. The carb is a chinese amazon one and the original is long gone. I might see if the choke lever is bent, probably do a valve adjustment (unless it has hydraulic lash adjusters) and some plugs to try to get it to start better.

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Cub Cadet
cubcadet.com › service & parts › shop by part type › oil, lubricants and fuel additives › 20w-50 full synthetic hydrostatic transmission fluid - 1 quart
20W-50 Full Synthetic Hydrostatic Transmission Fluid - 1 Quart - 490-000-C077 | Cub Cadet US
20W-50 Full Synthetic Hydrostatic Transmission Fluid - 1 Quart
Cub Cadet SAE 20W-50 Full Synthetic Hydrostatic Transmission Fluid is engineered to withstand mechanical stress and shearing for wear protection, performance and consistently smooth control that won’t fade over time. It also resists oxidation to help prevent varnish and sludge deposits and promote long oil and equipment life. Used in most CUB CADET® Zero-Turn Mowers with HYDRO-GEAR® & PARKER® transmissions as well as Riding Mowers with TUFF TORQ® transmissions For Cub Cadet® ULTIMA Series™ and Enduro Series®
Price   $21.19
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Lawn Care Forum
lawnsite.com › home › forums › equipment › 🔧 mechanic and repair
Cub Cadet Z-Force mower-- HYDRO TRANS REPAIR | Lawn Care Forum
October 8, 2009 - I just bought a Cub Cadet Z-force 50" mower off eBay. Its got the 23hp Kohler V-twin engine. 300 hrs on machine. I paid $500 for it. The transmission is in need of repair or "worst case" replaced! the guy told me it started clicking, and wouldnt pull after awhile. I'm not very familiar with...
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Lawn Mower Forum
lawnmowerforum.com › home › equipment › brands › cub cadet
Hydrostatic Trans. Fluid Change RZT 50 | Lawn Mower Forum
July 8, 2016 - Cub Cadet · You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter LT1045wrh · Start date Sep 13, 2016 · ••• · Export thread · Joined · Jul 18, 2011 · Threads · 17 · Messages · 57 · Sep 13, 2016 / Hydrostatic Trans. Fluid Change RZT 50 · #1 · Hi Everyone, Just completed a fluid change on the hydrostatic transmission on my older model RZT 50.
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Cub Cadet
ccpartsnmore.com › m5 › ZCDMBB-4MDC-24PX--left-side-hydrostatic-transmission.html
ZCDMBB-4MDC-24PX Left-Side Hydrostatic Transmission
Left-Side Hydrostatic Transmission
HYDRO-GEAR ZCDMBB-4MDC-24PX · Left-Side Hydrostatic Transmission for RZT Riding Mowers (2013 - ) · Craftsman: Z6000 and Z6400 · Cub Cadet: RZT L34, RZT L42, RZT L42 H,RZT L46, RZT L50 KH, RZT L50 KW, RZT L54 KH, RZT L54 KW, RZT LX46 KW, RZT LX50 KW, RZT LX54 KW · For Right-Side Transmission, Use 918-05129B · SAME AS CUB CADET, MTD: · 618-05128A · 918-05128A
Price   $718.86
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Cub Cadet
cubcadet.com › service & parts › shop by part type › belts › riding mower hydrostatic transmission belt
Riding Mower Hydrostatic Transmission Belt - 954-04043B | Cub Cadet US
Riding Mower Hydrostatic Transmission Belt - Original Equipment Genuine Part (OEM)
Fits Residential Zero-Turn (RZT) Riding Mowers, 2004 and newer For Troy-Bilt, Cub Cadet, Craftsman, Yard-Man, MTD Gold, White Outdoor, Mastercut and Murray Fits Cub Cadet RZT42, RZT50 KH, RZT50 KW, RZT50 VT, RZT54, RZT54 KW Fits Craftsman ZTL7000, ZTL8000 Fits Murray MZ2142, MZ210-42 Fits White Outdoor ZT-17, ZT-22, ZT-42, ZT-4200, ZT-50, ZT-5000, ZT-54  Fits Troy-Bilt Colt XP, Mustang XP, Mustang RZT 50
Price   $43.90
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Cub Cadet
cubcadet.com › service & parts › shop by part type › belts › rzt hydrostatic transmission belt
RZT Hydrostatic Transmission Belt - 754P05874 | Cub Cadet US
RZT Hydrostatic Transmission Belt
For RZT Models (2019 - ) Fits Cub Cadet Ultima Series ZT1-42 KH, ZT1-46, ZT1-50 KW, ZT1-54 KH, ZT2-50 KW, ZT2-54 KW, ZT2-60 KW and ZT3-60 KW Fits Craftsman Z510, Z530, Z550 and Z560 Fits Troy-Bilt Mustang Z50, Mustang Z42, Mustang Z46 and Mustang Z54
Price   $45.46