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Bentley Convertible Top Hydraulic Cylinder Rebuild/Upgrade Service

Bentley

We upgrade your cylinder(s) by replacing the tiny OEM rod seal with a much larger one made of superior materials.  We then add custom caps made of CNC machined stainless steel to accommodate these superior seals. Our seals are not sensitive to water and are resistant to most additives in hydraulic fluid. This results in a much longer service life than the standard OEM cylinders for a fraction of the price.

Top Hydraulics' also rebuilds and upgrades convertible hydraulic pumps, and we also manufacture our own upgraded hydraulic lines.

Owning and driving a convertible with an automatic top is prestigious, convenient and exciting - let Top Hydraulics help you enjoy your beautiful car even more by making your convertible top system truly better than new!

Top Hydraulics' standard warranty is 3 years on rebuilds/upgrades of convertible top cylinders and hydraulic pumps, and on new hydraulic hoses.

You remove your cylinders you would like to have rebuilt, and send them to us.

Core Exchange is currently NOT available for Bentley cylinders.

The Bentley Azure has 12 cylinders. They should be upgraded at least in pairs, and preferably as a complete set. Once we receive your cylinders, the turn around time for Bentley cylinders is up to two days for rebuild service and we will ship the cylinders back to you by Priority U.S. Mail (2-3 days delivery time). Please note that in the unlikely event the brass colored main lift cylinders or tonneau cover lift cylinders should have rust on the chromed shafts, we will have to replace the chromed shafts with stainless steel ones of our own manufacture for a surcharge.

Bentley

Rebuild/Upgrade Service for your 1996-2003 Bentley Azure Convertible Hydraulic Components

Bentley Azure 1st Gen '96-'03

We upgrade your cylinder(s) by replacing the tiny OEM rod seal with a much larger one made of superior materials.  We then add custom caps made of CNC machined stainless steel to accommodate these superior seals. Our seals are not sensitive to water and are resistant to most additives in hydraulic fluid. This results in a much longer service life than the standard OEM cylinders for a fraction of the price.

Top Hydraulics' also rebuilds and upgrades convertible hydraulic pumps, and we also manufacture our own upgraded hydraulic lines.

Top Hydraulics' standard warranty is 3 years on rebuilds/upgrades of convertible top cylinders and hydraulic pumps, and on new hydraulic hoses.

The Bentley Azure has 12 cylinders. They should be upgraded at least in pairs, and preferably as a complete set. Once we receive your cylinders, the turn around time for Bentley cylinders is up to two days for rebuild service and we will ship the cylinders back to you by Priority U.S. Mail (2-3 days delivery time). Please note that in the unlikely event the brass colored main lift cylinders or tonneau cover lift cylinders should have rust on the chromed shafts, we will have to replace the chromed shafts with stainless steel ones of our own manufacture for a surcharge.

Bentley Azures 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 materials:

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.

Owning and driving a convertible with an automatic top is prestigious, convenient and exciting - let Top Hydraulics help you enjoy your beautiful car even more by making your convertible top system truly better than new!

Rebuild & Upgrade of your Bentley Continental GT Convertible hydraulic components.

Continental GTC

Rebuild & Upgrade of your Bentley Continental GT Convertible hydraulic components.

Bentley Mark VI Cabriolet 1951-1952

Rebuild & Upgrade service for your Bentley Mark VI Cabriolet hydraulic components.

Bentley Azure 2nd Gen '06-'09

We upgrade your cylinder(s) by replacing the tiny OEM rod seal with a much larger one made of superior materials.  We then add custom caps made of CNC machined stainless steel to accommodate these superior seals. Our seals are not sensitive to water and are resistant to most additives in hydraulic fluid. This results in a much longer service life than the standard OEM cylinders for a fraction of the price.

Top Hydraulics' also rebuilds and upgrades convertible hydraulic pumps, and we also manufacture our own upgraded hydraulic lines.

Owning and driving a convertible with an automatic top is prestigious, convenient and exciting - let Top Hydraulics help you enjoy your beautiful car even more by making your convertible top system truly better than new!

Top Hydraulics' standard warranty is 3 years on rebuilds/upgrades of convertible top cylinders and hydraulic pumps, and on new hydraulic hoses.

You remove your cylinders you would like to have rebuilt, and send them to us.

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Send us your Bentley Mark VI Hydraulic pump and we will rebuild & upgrade it to better than new condition!

Price
$2,000.00
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Core exchange for the full set of twelve cylinders + New and upgraded set of hydraulic hoses.

$3,999.99 + $3000 refundable core deposit.

Please send back your cores with locking cylinders mounted inside their latches - this minimizes risk of mechanical damage to the shafts.

Price
$6,999.99
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 You send us your malfunctioning convertible hydraulic pump and we rebuild it for $600.

Once we receive your pump, the turn around time is up to one week for rebuild service and we will ship the pump back to you by Priority U.S. Mail (2-3 days delivery time).

-OR-

Order a rebuilt and upgraded pump from our inventory (additional $500 core deposit applies). 

Once we receive your old pump in the mail, we will refund your $500 core deposit provided there is no unusual damage to your core.

Price
$600.00
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There are two ways to order:

1. Rebuild & Upgrade Service. 

Send us your convertible hydraulic system first.  We upgrade the cylinders and pump with superior seals and replace all hydraulic hoses with a vastly superior material. You get a top system that has been rebuilt to outlast and outperform brand new OEM ones.  Turn around time is 1-2 days for rebuild service plus 2-3 days shipping time

or

2. Core exchange. (includes $2000 core deposit)

This means that you get a rebuilt & upgraded hydraulic top system shipped from Top Hydraulics' inventory first, then you ship back your original system for credit of your $2000 core refund. You get a top system that has been rebuilt to outlast and outperform brand new ones.

Choose your order method below

Price
$2,800.00
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Top Hydraulics replaces the OEM hose material on your complete convertible top hose assembly with far superior material. The OEM hoses are rated at 3,000 psi; Top Hydraulics' hoses are rated at a burst pressure of 23,200 psi! 

Easier to install than OEM lines, hose material made in Germany to Top Hydraulics' specifications. We are certain that these are the best hoses on the market.

This set includes a complimentary wire clip installation tool, as well as o-rings and wire clips for installation on the pump end, plus our proprietary venting hose for the front locks.

Price
$2,999.99
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Rebuild service for the full set of twelve actuators. Please send locking cylinders mounted inside their latches - this minimizes risk of mechanical damage to the shafts.

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

Price
$990.00
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Price listed is for Rebuild & Upgrade Service for a single cylinder.

- You send in your cylinder(s) to be rebuilt.

Turn around time is 1-2 days for Rebuild & Upgrade service plus 2-3 day return shipping time.

Choose the quantity of cylinders you are sending in below.

Price
$220.00
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 Front Locking Cylinder above the windshield - send in your cylinder first. Upgrading your leaking or aging actuator with the best seals available, far exceeding OEM quality. Feel free to send the cylinder mounted in its latch UB92044 and UB 92045.

Price
$55.00
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Top Hydraulics manufactures new, superior hydraulic hoses. It is highly recommended to upgrade all your hydraulic lines at the same time.

Price
$99.99
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Rear Lock/Latch Cylinder - latches down the rear of the canvas. UT 13582PA or UT 13581PA. Located next to cover lift cylinders. Please mail mounted inside the latch to minimize risk of damage upon removal. Rebuild service for your leaking actuators using best seals available, far exceeding OEM quality.

Price
$55.00
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Tonneau Cover Lock/Latch Cylinder p/n UB92029 or UB92028 - latches down the storage cover. Please ship mounted inside its latch to minimize risk of damage upon removal. Rebuild service for your leaking actuators using best seals available, far exceeding OEM quality.

Price
$55.00
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Bow Extension Cylinder - moves rear canvas up and down, located inside soft top frame. P/N UB92048 or UB92047. Rebuild service for your leaking actuators using best seals available, far exceeding OEM quality. Highly recommended to upgrade in pairs, if not as whole set.

Price
$85.00
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