Full Set of 12 Top Cylinders - Rolls Royce Corniche V

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Part Number CORNICHE_CYL_SET Make Corniche V 1996-2003

You send in your leaking set of Corniche cylinders, and Top Hydraulics rebuilds them.

  • Top Hydraulics replaces & upgrades ALL seals in your cylinders with our superior proprietary material including rod seals, gland seals, port seals, plug seals and piston seals. Top Hydraulics' u-cup seals have a far more reliable seal and much longer service life.

Send in your cylinders first. Feel free to send locking cylinders mounted inside their latches.

Includes pairs of Front Lock Cylinders, Tonneau Cover Lock Cylinders, Tonneau Cover Lift Cylinders, Bow Extension Cylinders, Rear Lock Cylinders, and Main Lift Cylinders.

Order Method:
$1,190.00

Rolls-Royce Corniche V Top Hydraulic Cylinder Rebuild and Upgrade

 

 

Rebuild service to "better than new" condition with 3-year warranty on parts only (assuming parts arrive without blemishes on the polished shafts). Using the best seals available, far surpassing OEM quality. All cylinders should be rebuilt in pairs, and preferentially as complete sets.

 

Includes the following Bentley/Rolls-Royce part numbers:

Locks with cylinders:
UB 92044   aka UB92044:  RH front lock "Front Header Latch"
UB 92045   aka UB92045:  LH front lock "Front Header Latch"
UB 92029   aka UB92029:  LH tonneau cover lock  "Hood Cover Latch"
UB 92028   aka UB92028:  RH tonneau cover lock  "Hood Cover Latch"
UT 13582PA aka UT13582PA: RH rear lock  "Rear Bow Latch"
UT 13581PA  aka UT13581PA: LH rear lock  "Rear Bow Latch"

Cylinders:
UV 20837PA  aka UV20837PA:  main lift cylinder (2x)  "Main Lifting Ram"
UB 92048 aka UB92048:   LH bow extension  "Bow Cylinder LH" (has switch attached)
UB 92047  aka UB92047:  RH bow extension "Bow Cylinder RH"
UB 90262  aka UB90262:  tonneau cover lift cylinder (2x)  "Power Piston - Tonneau Cover"

Top Hydraulics manufactures stainless steel replacement shafts for all cylinders listed above and can replace your shafts (at an additional charge), should they have become damaged during removal from the vehicle. The metal parts on these cylinders do not get damaged by regular use.

 

Rolls-Royce Corniche IV's use some Mercedes "R129" cylinders, with two of them modified. Rebuilding these cylinders is NOT a matter of changing o-rings. Every R129 cylinder has one o-ring, and those rarely ever fail. What fails most frequently, are the other seals, which have special shapes for proper function. Top Hydraulics replaces and upgrades ALL seals in the cylinders with superior material:

1) Rod seals. They are cup-shaped and seal the piston rod from the rest of the cylinder. When they fail, you will see fluid coming out next to the chromed shaft (rod). These are usually the first seals to fail in the cylinders.
2) Piston seals. They seal the input and output sections from each other, as the piston slides through the cylinder. The piston seals have been made of different materials and sizes even in the same p/n cylinders throughout the years. Failing piston seals will cause internal leaks, which result in a pressure drop in your hydraulic system. Early model years have the added problem that the piston seals swell up and make it very hard to move the piston inside the cylinder. Crumbling piston seals can block valves or pinholes inside the hydraulic system, and it can be difficult to diagnose a piston seal failure without testing several cylinders once you find that your top is moving slowly or not at all.
3) Cap seals. These are just o-rings that seal the top cap of the cylinder from the housing. They are usually the last seals to fail, but these o-rings are penny items.
4) Port seals. They seal the hydraulic lines where they are pushed into the cylinders. Port seal failure is becoming more and more common as the R129s age. It also applies to the front distributor p/n 1298000022. Port seals have a special shape that makes them seal under pressure. O-rings wouldn't do the trick. They are secured by precisely machined brass rings (accuracy about 1/100 mm). DIY removal of the brass rings will almost certainly destroy the brass rings. Top Hydraulics installs port seals that are tighter than the originals, just in case the hydraulic line fittings have been scratched.

FedEx 2-Day Delivery

Most orders placed within the USA will ship via FedEx 2-Day Service.

FedEx Priority Overnight Service

Orders placed with FedEx Priority Overnight Service can typically ship same day as long as the order is received before 11AM Pacific Standard Time


FedEx International Priority

For Customs clearance, you must declare a value on the package you are sending us.  Please note: parcels with a declared value under US$750 enter the US without incurring taxes, duties or clearance fees. Considering that you are sending us broken parts for repair, it is most reasonable to declare a value under US$750. You can insure your parcel only up to the amount that has been declared as the value for customs, so your best insurance is good packaging. It is extremely rare that parts get lost on the way to us. 

Please be sure to drain or cycle all fluid out of your parts, then wrap them in plastic, so that the parcel does not get soaked in oil. It is generally a good practice to double box pumps or sets of cylinders because heavy parcels take quite a beating in international transit unless you are using a premium carrier such as FedEx. Clearly, you don't want to just stick a part into a cardboard envelope without any further protection or buffering. Buffer your parcel well inside so that parts don't rattle around or the parcel gets crushed from others on top of it. Ideally, tape all around all surfaces of the parcel, which generally provides excellent protection against losing components that are trying to escape through small holes in the cardboard.

We use FedEx International Priority for almost all outbound international shipments, as they tend to offer the fastest and most secure service. Due to our shipping volumes, our rates for return shipping your parts via FedEx International Priority are typically equal to or cheaper than Postal Service. We cannot offer shipping labels for your shipment from you to us - you will have to shop around for the best option to ship your parts to us.

In the rare event that you feel you have to declare a value over US$750 on your parcel shipping to us, please understand that we will need to be reimbursed for any importation fees or duties incurred. You agree to this by accepting our terms and conditions when you place your order. On high value parcels, we are typically charged an Entry Prep Fee (currently  about $25) plus 2.5% tax on the declared value of the package, there are oftentimes delays in customs, and it can take a while for us to receive the actual customs invoice. 

Depending on the parts you are sending us, your customs declaration might say "hydraulic cylinder for repair" or "hydraulic pump" for repair. Please note that DHL does not like to carry hydraulic parts or used car parts in some countries. If your carrier asks for the "harmonized code or tariff" of the parts you are shipping, those are 841221 for linear actuators (cylinders) and 841360 for pumps.

At Top Hydraulics, we pride ourselves on providing new and remanufactured parts with unmatched quality and longevity.

It is very rare that our parts fail. Obviously, we are only human and we could have made a mistake or one of our components might indeed have had a hidden defect. Please contact us first when you suspect that you have a warranty case, so that we can try to help right away. It could be that the failure you are experiencing is caused by a different component or that the installation was not quite proper, so we like to be in touch first to go over the situation with you.

Unless stated otherwise, there is a 3 year warranty on all new and remanufactured parts provided by Top Hydraulics.  This warranty is transferable. All parts manufactured or rebuilt by Top Hydraulics have unique markings, so there is no additional paperwork needed to transfer a warranty. The warranty does not cover labor, direct or consequential damages. The warranty is void when the parts have been abused or have been installed incorrectly, or when brake fluid or stop-leak additives have contaminated your hydraulic system..

You will have to send your failed part(s) back to Top Hydraulics for a warranty evaluation. In the extremely rare case of failure on rebuilds or new parts shipped or provided by Top Hydraulics, Top Hydraulics' warranty covers only parts and is limited to rebuilding the products previously shipped by Top Hydraulics, or replacing them, or refunding the rebuild fee at Top Hydraulics' discretion. If the failure was our fault, then we will refund reasonable shipping costs, as well.

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