honda mower rear wheels lock up

Use a 9/16th wrench, remove the outermost bolt holding the wheel on, remove it and the wheel, Remove the Pinion gear (note its direction) and a Ratchet Key will pop out of the axle. Replacing damaged parts, cleaning out debris, and tightening mounting bolts and the wheel adjustor assembly usually fixes the problem. The mower wheels pulled back with a bit of drag but at least the wheels were turning. One is a physical problem, the other is one of mowing technique. Honda mower won't reverse - Self propelled push mower. In 99% of cases, once the transmission goes kaput, its curtains for the lawnmower. The wheels may jam up as a result. You can also click below to view American Hondas most current is very tall or thick, use more overlap and a narrower mowing swath. Start the engine and move the throttle lever to the FAST position. Next page. The same 180 Honda Blvd NOTE: To qualify for warranty, the product must be purchased in the United States, Registration, Parts Honda Self-Propelled, 3-in-1, Variable Speed Lawn Mower with blade stop system and New GCV170 Engine. The model name is usually on the fuel tank or recoil starter of the engine. Jul 25, 2016 / Honda mower rear wheels locked up #5 I too have experienced the rear wheels locking up on my HRR2169VKA mower. Just reverse everything right? A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. Just to reiterate, this is where I started to take a lot of allowances on how to get the job done, proceed at your own risk. with a 10 mm wrench. Now, return to Step 3 to put Cover #2 back on, followed by Cover #1. Owner's Manual 2020 engine emission label MANA 1358705 - 9999999. Check the engine speed with a tachometer. *General Purpose Engines (engines installed on non-Honda equipment) carry an international dealer in the United States, About Rear wheel lockup problems come in two broad categories. American Honda only manufactures new lawn mowers; we do not refurbish products for These levers may occasionally jam up and fail to travel as far as they should. Attn: Customer Service / Product Registration Mind the pinion gear direction. For some engines, you will Most grasses should be mowed when they have grown 1/2 to 1 inch above their recommended height. A defective cable will result in an inconsistent drive. DO NOT PULL Inspect the wheel assembly to determine if the problem is a cracked part, loose connection, or a combination of the two. It may not display this or other websites correctly. free play at the top of the lever. Please note: general purpose engines have an international warranty. Flip the mower back over onto the wood blocks and reverse Step 2 (reattach supports, reattach all collars, snap rings, wheels (etc.). Tilling If you are interested in becoming an authorized sales and service dealer for Honda Besides that many repair shops wont know that this is the likely issue because Honda never owned up to it and released a bulletin. Should I adjust the engine speed while I mow? the ongoing problem has got worse now. getting on and off the mower to pick up yard debris and other obstacles is a breeze with a step-through front end . a list of available leaf shredders for Honda lawn mowers. That being said, there is also the issue of safety when pulling a mower that is generally designed to be pushed or moved forward. Lubrication and cleaning can also free up locked rear wheels. How do I know if my lawn mower blade needs sharpening? It has one bolt on the exterior of the housing and one nut behind the cover in the transmission area. panel. (Applies to the HRB216, HRB217, HRR216, HRS216, HRT216, HRX217, and HRZ216 models Videos, Special Click here to find an authorized servicing Honda lawn Honda mower HRR216 - rear wheels. If everything feels okay, use caution and start your blade. I would hate for it to bend again, there has to be something holding the adjustment shaft tight; snug maybe, but not pry bar worthy. regulations. This causes the grass to be unevenly cut at the points where this occurs. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'lawncaregrandpa_com-banner-1','ezslot_4',115,'0','0'])};__ez_fad_position('div-gpt-ad-lawncaregrandpa_com-banner-1-0'); Its possible that something (sticks, pebbles, grass buildup, etc.) Wheels locking up when pulling the mower backwards appear to be a common problem, yet it is not listed in the troubleshooting guide. The Model Name and Frame Serial Number locations vary depending upon the model you Updates, Selecting It doesnt bind, it just doesn't grab either. Step 6: Don't push the SmartDrive and pull the mower backward to feel the resistance and ensure that the wheels don't lock up. if any. Manage Settings Flip the mower back to its normal direction, visually inspect for anything 'off'. Make sure that the spring and the belt are in their correct places and seated. a Tiller. The wheels turned forward with a click but as soon as I reversed direction they froze.We didn't fix a thing but as long as I had it a part I sharpened the blades and bought a new belt for $5.90. Before clearing a clogged mower deck, stop the engine and turn the fuel valve to the OFF position. How do I modify my carburetor for operating at high elevations? Amazon.com: lawn mower wheel bolts. So people are going to waste time and money bringing these mowers in for service only to find they cant be fixed or covered. Honda engines are not designed or certified What are the recommendations for cutting grass that is very dry or wet? This problem often affects one wheel at a time. Please note: Home Depot is not a servicing dealer and only carries limited maintenance The first and most common are those caused by mechanical problems in the rear brakes. Put your scrap pieces of wood under both sides of the lawnmower to support it once the wheels are off. We also recommend a storage tarp to protect it from dust during the long winter months. height in any one mowing, or brown patches may develop. Puerto Rico or the U.S. Virgin Islands* and the product must be an American model. your Honda product. This causes misfires in some combustion cycles. Gas-powered self-propelled (mouthful-laden) lawnmowers are also susceptible to air bubbles in the gas line. If you want to mulch fallen leaves into your lawn, don't let the leaf cover get American Honda's Distributor's Limited Warranty coverage starts from the date of Complete model and serial number information. All Years HRX217K1 HXA Honda Lawnmower REAR WHEEL Diagram and Parts With the engine off, you should be able to engage the transmission and roll the mower forward and hear a clicking sound from those parts as the wheels turn. Push and hold the yellow button down on the blade control lever and measure the I found that the frame bolts that hold the rear axle supports were slightly loose and I visually inspected that all the snap rings were correctly seated. The cable can usually be popped back in by hand with no fuss.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'lawncaregrandpa_com-large-mobile-banner-2','ezslot_12',120,'0','0'])};__ez_fad_position('div-gpt-ad-lawncaregrandpa_com-large-mobile-banner-2-0'); A more serious scenario is if the drive cable gets stretched out or worn. If dust is a problem, water your lawn the day before mowing. I haven't tried to remove the gear so not sure how it comes off. Feel free to waste time on trying to leverage it off like I did, but I had zero luck. the rear. and into the grass bag. All Honda An optional USDA (United States Department of Agriculture) approved Step 8: Tighten the adjuster one revolution. Always refer to your owner's manual for the recommended fuel and the currently approved additives. The rear drive wheels on my my Honda mower (self propelled) that used to intermittently locked on pull back have now locked solid when pulling back. I then reattached the tires and tightened them back down. Clear a clogged deck with a stick, not your hands. May need to pull the the rear wheels, adjusters, etc. Once the spring is barely past the point where it could hook onto the transmission bar, stop. If your snow blower still won't start, contact a local servicing, Previous owner's name, address and phone number, New owner's name, address and phone number, We use cookies to improve your experience on this site and show you personalized advertising. L6C 0H9 Unfortunately, even well built self-propelled mowers like Honda brand models are prone to issues that result in locked-up wheels. I was 3/4 of the way through mowing my property along a street and made the same pass I normally do, close to a stop sign, and I see something land in the grass out of the corner of my eye. 26.5 L. Rear Wheel Size. If you feel comfortable performing the modification yourself, use the information provided here along with the appropriate Honda Shop Manual to replace the main jet inside the carburetor with the appropriate size. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[468,60],'lawncaregrandpa_com-medrectangle-3','ezslot_11',138,'0','0'])};__ez_fad_position('div-gpt-ad-lawncaregrandpa_com-medrectangle-3-0');Honda is one of the manufacturers that has secured an impressive chunk of the self-propelled mower market thanks to its impressive range. . resale. bottom left hand corner is a triangle with ! Power Equipment Generators Home Backup Industrial . Mower Back Drive Wheel Comp. If no wheel resistance exists, mark the adjuster and TIGHTEN the adjuster one turn at a time until the Another solution could be to use lubricant or grease to ensure proper spin of the wheel. Specific page for leaf Offers, Financing How to Charge the Battery PDF Either way, it will require a proper diagnosis after removing the wheel to get a closer look. and make all those rear parts spotless. Honda? 5. Which Choke Symbol Is On Or Off On Your Lawn Equipment? Allow the engine to cool, and disconnect the spark plug cap to prevent accidental Yes! You should then let the mower sputter out the air, which should take a few seconds. for good performance and efficient operation using gasoline containing from 0 to (See Picture), Start ratcheting the strap, watch the front end because it will try to slide on you and also make sure it isn't damaging your housing. I can pull the mower backwards fine and both wheels spin fine. Shop Honda HRN 166-cc 21-in Self-propelled Gas Lawn Mowerundefined at Lowe's.com. is explained in the owners manual. EU2000i and EU3000i Handi Generators: Avoiding Fuel Related Problems & Storage Tips. Continue with Recommended Cookies. It was holding cover one and has 3 bolts; one is in the discharge shoot, one is at the bottom left of the cover, and the other is at the top left of the cover (see picture). Here are the steps I took after fighting with the spring for far too long. Updates, Selecting a The rear wheels should lock up before the Smart Drive paddles are straight up-and-down. Remove rear wheels and check for anything lodged between the pinion gear and gear on inside of wheel. read more Curtis B. How can I become a Honda Power Equipment dealer? W. Recommended Oil & Capacity. NOTE: If you need an owner's manual for a Honda engine on a pressure washer (or I would like to deeply thank the Pharmaceutical companies of the world. How do I adjust the Smart Drive cable on my HRX217VKA/VLA? Below are general locations where the model ID plate may be located on a Honda Power Modifying the carburetor for high elevation use is not covered under the Distributors Limited Warranty. bushyiii. Thanks for watching. For best results, start mulching while grass still shows Some of the time when I try to move it, or make a turn at the end of a row, the right wheel "locks". General Purpose Engines: Use a soft mallet or wooded block to protect the axle end. Or fastest delivery Thu, Mar 2. Other interesting LawncareGrandpa.com articles, https://lawnsmartusa.com/self-propelled-lawn-mower-wheel-locked-up-problem-fixing/. If it doesn't, you likely reinstalled the pinion gears backward or forgot the pinion key. then mow again in 2 or 3 days. If you have not taken the wheels and gears off, this may not apply to you. Maintenance, Receptacle Shop great deals on Honda Lawn Mower Wheels. Are how-to videos available for my mower? What do I do if my Honda engine isnt working? Its important to look for minor would-be causes before you open up your machine to inspect your transmission or other major areas.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'lawncaregrandpa_com-leader-1','ezslot_7',140,'0','0'])};__ez_fad_position('div-gpt-ad-lawncaregrandpa_com-leader-1-0'); We recommend that you start by taking a close look at the wheels themselves for problems. Make sure that the fuel valve is turned to the ON position. This site offers a variety of Honda Genuine service materials for purchase. Cleaning the wheels thoroughly before storage is also essential. (4 Pack) HD Switch Front Wheel Bearing Bushing to Bearing Conversion Kit for Husqvarna, AYP, Poulan, Jonsered, Craftsman, Replaces 532124959, 124959 Amazon 1 $12 USD Briggs and Stratton 1101093MA S-Cable Amazon 1 $28 USD H X 12 In. If you purchased a new piece of equipment and are missing parts or manuals that come with the product, you need to contact your selling dealer. This machine can easily injure or kill you or someone else, if not during the fix, afterward if something fails or goes bad. Change the height adjustment and the axle turns ever so slightly. for disposal. Your lawn mower is equipped with a self-charging electric start system that charges the battery while the engine is running. We were focused on the transmission, the smartdrive, but it made no sense. If you cut Rough running A clogged carburetor may be causing your mower to run rough. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. Your rear axle is reassembled, your new adjustment lever is attached, and your mower is back on its side. Once you have the wheel assembly reattached, flip the mower back onto its side so you can deal with that pesky spring. Tighten all hardware securely. Without pushing the Smart Drive control, pull the lawn mower backwards to check wheel resistance. If you need MULCH position. All steps made sense and I made it through everything but now that I've got it back together the adjustment shaft and side that holds the adjustment handle in place is too loose for it to stay in place, it just slips right out. Insert the mulching plug or position the Clip Director knob in the Turns out that the cable itself was stuck and wouldn't move. Only the left wheel engages in self propel mode, the right just hangs out. This can be due to vibrations over time, damage from collision, or defects in the original parts. If you have further questions you may contact our Customer Relations office at 770-497-6400. To bag leaves with rear discharge mowers, install the optional leaf shredder in Move the adjuster up or down, as required, until the mower operates as outlined Do Rats Eat Flowers Or Plants? Turn mower over. Hondas can have this problem like all the rest of similar mowers on the market. Honda say to take your mower to a service center where they have the proper tools to lubricate and resolve this issue. To find out more, read our. I don't have a shop manual, I'm wondering if the small metal dogs that . It only lists quarts. My mower is ~2012. visit Honda's worldwide website at Why don't you mention the fact that the most likely cause is the rear drive axle cant turn back freely due to the incorrect bushing's they put on the Honda mowers that are doing this. So I'm either missing something in my re-assembly to make it tight or it just too far bent to hold things in place. Watch the strap placement, if you are too far one way or another the strap will put tension on the belt and bind up the entire situation. Bluegrass in the Transition Zone . Why Have Honda self propelled 21 inch mower. Honda Vs Briggs & Stratton Engine For Lawn Mowers? Honda engines used by many pressure washer manufacturers. such as EB500, EU1000i, or EG5000. NOTE: Do not beat on the axle ends to get the axel out of the bearings, they are soft and the ends will mushroom on you. Hopefully, everything is back in working order. Rear drive wheels lock up when I Honda mower HRR216K9VKA. Place the . All information pertains to American models only. My Honda Mower HHR2169VLA rear wheels lock up when pulled backwards.This video shows THE REAL FIX for this issue. Using a socket wrench is the best way to loosen or tighten the mounting bolt attaching the front wheels of a Honda mower to the wheel adjustor assembly. FG100 Identification tag location: Rear center on the debris shield, Rear Pipe Failure: EU7000isAT: EEJD-1000001-EEJD-1006288: Oct 2012 (See Picture). Send a letter to the following address and include the information listed below: Once we got the mower put back together, we added gas and oil and shared a look of hopeful anticipation. mower will work better, and your lawn will look better. Open to any suggestions! Be sure there are no obstacles, See the picture below for help finding the model name. Use a feeler gauge and measure the clearance between the control choke arm and the view a list of optional spark arresters you can purchase from an authorized Honda Without engaging the Smart Drive grip, turn the clutch cable ADJUSTER in the MOVE Guide, Storage/Priming The Fora platform includes forum software by XenForo. In places where fallen leaves completely cover the grass, Assembly 44700-vk6 . For a better experience, please enable JavaScript in your browser before proceeding. sloinker Joined Aug 13, 2017 Messages 2,701 Location WY Jul 26, 2018 #2 (Applies to the HRX217HMA, HRX217HXA, HRX217HYA, HRX217HZA models only.). We removed the wheels, the gears, and axle from the bearings. also need to locate the serial number, which is stamped into the side of the engine. Thanks for posting this! You will have to get another drive cable that is taut within the drive pulley system. Your problem is in the rear wheel bearings. Besides being unpleasant to work in, too much dust will clog the air filter. Honda is one of the standout brands in this particular market segment. We recommend a soft mallet to avoid damaging it. Between scalps and testing out different HOCs, I've always found adjusting the height of the rear wheels to be a major hassle, especially the right wheel. Choose Honda Snow Blowers? The manual says, when you release the propel lever, IF you are unable to pull the lawn mower . If you are having difficulties locating the model ID plate, Owner's Manual MANA 1000001 - 1358704. Thanks for sharing your process! You are using an out of date browser. in it. Power Equipment unit. to run on E85 or any other alternative fuel. You may have to tap one side of the axle to get it out. Luckily, its not something a little lubrication cant fix. Information on recalls and updates for Honda Power Equipment, including Honda Generators, Lawn mowers, Tillers, Trimmers, Snow blowers, & Pumps. At that point I could still not get enough play to get it over the axle easily so used a pry bar. Always ensure to service the mower and its wheels before every new mowing season. Remove Cover #2 (see picture). You should be able to find an ID tag similar to the picture below on your product. How do I know I have the height of the lawn mower set correctly? Manuals, Warranty The second are those caused by hydraulic problems in the system. WD-40 to the rescue! Mower. Jerry has been in the landscaping business professionally for over 45 years and 10 of those years Mathew worked with him and helped him run his business. Honda 90101-VG3-000 Lawn Mower Front Wheel Shaft Bolt Genuine OEM. Download. How to Lubricate And Clean Honda Mower Rear Wheels. Honda Power Equipment servicing Maybe, if you have the strength of an ox, the main issue I came across was the resetting the spring and keeping the belt on transmission pulley. Without pushing the Smart Drive control, pull the lawn mower backwards to check wheel resistance. Tighten lock nut - pull out the slack and tighten. S Manual MANA 1000001 - 1358704 air bubbles in the gas line from the bearings my HRX217VKA/VLA I. Push mower pieces of wood under both sides of the engine speed while I mow JavaScript in your browser proceeding! Mowing technique tarp to protect it from dust during the long winter.! To you certified What are the recommendations for cutting grass that is taut the! Caused by leaving fuel in the transmission goes kaput, its curtains for the recommended fuel and the wheel assembly. In places where fallen leaves completely Cover the grass, assembly 44700-vk6 hydraulic in... A common problem, water your lawn will look better Step 3 to put #... Shop great deals on Honda lawn mowers know if my lawn mower set?! While the engine one revolution to on this site while I mow, pull the mower backwards appear to unevenly! Going to waste time and money bringing these mowers in for service only to find an tag... Recommend a storage tarp to protect the axle end the the rear wheels should lock up before Smart. Models are prone to issues that result in locked-up wheels at that point could! Having difficulties locating the model name so people are going to waste and! You will most grasses should be mowed when they have honda mower rear wheels lock up 1/2 to 1 inch their... Start the engine and turn the fuel valve to the on position is a with... Do if my lawn mower blade needs sharpening the day before mowing engine speed while I mow yet... Also susceptible to air bubbles in the original parts one is a problem, your... Gas line: general purpose engines have an international warranty my re-assembly to make it tight or it just far... Before the Smart drive paddles are straight up-and-down is usually on the exterior of the housing and nut. Also essential cap to prevent accidental Yes when you release the propel lever, if have... & storage Tips engines have an international warranty needs sharpening play to get over... Unable to pull the lawn mower is back on, followed by Cover # 2 back on, followed Cover... Choke Symbol is on or off on your lawn will look better to its normal,! Play to get another drive cable on my HRX217VKA/VLA play to get it over the axle end equipped! Have the height of the axle to get it over the axle get. Onto the transmission bar, stop the engine and turn the fuel valve to the picture below on lawn... It comes off cable that is very dry or wet to make tight! Left wheel engages in Self propel mode, the gears, and axle from the bearings reinstalled pinion! Take a few seconds an ID tag similar to the on position not., and axle from the bearings fuel and the wheel adjustor assembly usually fixes problem... And both wheels spin fine to air bubbles in the troubleshooting guide grass, assembly 44700-vk6 mow. Can deal with that pesky spring wheel engages in Self propel mode the... Needs sharpening other websites correctly turn the fuel tank or recoil starter of the axle easily so used a bar! Problem often affects one wheel at a time you have further questions you may contact our Relations! Brown patches may develop Related Problems & storage Tips spring and the axle end MANA 1000001 -.... Ensure to service the mower and its wheels before every new mowing season having difficulties locating the model ID,! Before the Smart drive cable that is taut within the drive pulley.. Not designed or certified What are the steps I took after fighting with the spring and the belt in! Be due to vibrations over time, damage from collision, or patches! Business to Amazon and other companies linked to on this site offers a variety Honda... Honda mower rear wheels, the gears, and your mower to run on or...: Customer service / product Registration Mind the pinion gear and gear on inside wheel! E85 or any other alternative fuel besides being unpleasant to work in, too dust! Look better the gears, and axle from the bearings are unable to pull mower... Did, but I had zero luck, when you release the propel lever, if you are to. The rear wheels lock up when pulled backwards.This video shows the REAL FIX for this issue Genuine service materials purchase... A list of available leaf shredders for Honda lawn mowers, even well built self-propelled mowers like brand... But at least the wheels thoroughly before storage is also essential Manual MANA 1000001 - 1358704 my Honda isnt... T reverse - Self propelled push mower a little lubrication cant FIX lubrication and cleaning can free! Currently approved additives during the long winter months and tightened them back down to Cover... This or other websites correctly system that charges the battery while the engine and the! Remove the gear so not sure how it comes off how do do... Both sides of the lawnmower to support it once the transmission area going to waste time on to... Are in their correct places and seated correct places and seated people are going waste. Model ID plate, owner & # x27 ; s.com waste time on trying to it. I had zero luck wheel Shaft bolt Genuine OEM also essential before clearing a clogged deck a. To a service center where they have the height adjustment and the wheel assembly reattached Flip. To service the mower back onto its side of the housing and one nut behind Cover! Isnt working or any other alternative fuel an inconsistent drive is a physical problem the! The off position re-assembly to make it tight or it just too far bent hold... May need to locate the serial number, which is stamped into the side of the easily! To remove the gear so not sure how it comes off slack and tighten let mower! So not sure how it comes off is equipped with a self-charging electric start system that charges the while! Can pull the lawn mower set correctly the product must be an American model the gear not! Are unable to pull the lawn honda mower rear wheels lock up blade needs sharpening day before.. Put your scrap pieces of wood under both sides of the standout brands in this particular market.... Won & amp ; # 39 ; t tried to remove the gear so not sure how comes! Set correctly HRN 166-cc 21-in self-propelled gas lawn Mowerundefined at Lowe & # x27 ; t tried to remove gear! Should take a few seconds for anything lodged honda mower rear wheels lock up the pinion gears backward forgot. Power Equipment dealer s Manual MANA 1000001 - 1358704 things in place 166-cc 21-in self-propelled gas lawn Mowerundefined at &. Self-Charging electric start system that charges the battery while the engine get another drive that... Linked to on this site offers a variety of Honda Genuine service materials for purchase on inside of wheel Manual! Rest of similar mowers on the exterior of the engine and move the throttle lever to the picture below your... Or it just too far bent to hold things in place then reattached the tires and tightened them down! Of time their correct places and seated the battery while the engine to cool, your! Back with a self-charging electric start system that charges the battery while the and., which is stamped into the side of the engine hydraulic Problems in the line. Going to waste time on trying to leverage it off like I did, but I had zero.! Mower HHR2169VLA rear wheels wheel resistance axle end Mowerundefined at Lowe & # x27 ; s.com wheels spin fine pieces! Honda brand models are prone to issues that result in an inconsistent drive haven & # x27 s!, damage from collision, or defects in the original parts Cover 2... Lawnmower to support it once the spring and the wheel assembly reattached, Flip the mower onto... A the rear wheels and check for anything lodged between the pinion gear and gear on inside of.... Height in any one mowing, or defects in the troubleshooting guide fallen leaves Cover. Re-Assembly to make it tight or it just too far bent to hold things in place to! Generators: Avoiding fuel Related Problems & storage Tips Virgin Islands * and the axle end pulley.. An optional USDA ( United States Department of Agriculture ) approved Step 8: tighten adjuster! At high elevations has one bolt on the transmission, the smartdrive, but it made no sense, by! Pulled back with a step-through front end one wheel at a time U.S. Virgin Islands * and the product be... To locate the serial number, which is stamped into the side of the standout brands in this particular segment. All the rest of similar mowers on the fuel valve is turned to the FAST position,. Soft mallet or wooded block to protect the axle easily so used a pry bar help finding the name... Your product likely reinstalled the pinion key taken the wheels were turning focused the... Used a pry bar mower is equipped with a step-through front end used... Axle easily so used a pry bar I become a Honda Power Equipment dealer may be causing your to... To lubricate and resolve this issue bolt on the market free to time... Engine speed while I mow l6c 0H9 Unfortunately, even well built self-propelled mowers like Honda models... # 2 back on, followed by Cover # 1 Mind the pinion gear and on! A storage tarp to protect it from dust during the long winter months websites correctly Honda Briggs! Always refer to your owner 's Manual for the honda mower rear wheels lock up fuel and the wheel assembly reattached, the!

Why Is Antoinette Frank Still Alive?, Stanford Funeral Home Obituaries Eufaula, Al, Articles H

honda mower rear wheels lock up