Installing Infinity Q45a Pump & Control Valve Accumulators

THIS WORK IS COPYWRITED June, 2001 by Keith Bowers and may not be distributed or reproduced except with express written permission. B and B Suspension and author expressly deny any and all liability for any adverse consequences, injury, or loss resulting from reading, implementing, or applying any of the information contained herein.

Infinity Q45a Pump and control valve Accumulator Removal

1. On the rear control valve, also locate the main pressure bleed screw(s), which is held with a lock nut. Loosen the lock nut(s) and loosen the screw(s) by turning it (out) counterclockwise to release any system pressure. Retighten the screw(s) and lock nut(s). This screw is often very tight. If necessary loosen the entire bleed screw assembly - it has an O-ring seal to the valve body.

2. On the right rear control valve bleeders, attach the hose and release any pressure as for the other valves. Re-close lightly

3. The rear valve accumulator is black and about 1 Ĺ inch in diameter and about 4 inches long and usually points to the rear. It does not have anything attached to it. It screws into the valve assembly (standard right hand threads) and seals with an O-ring at the base of the threads. Simply grasp it with channel-locks or a pipe wrench and unscrew it. Do not mess with the O-ring seal.

4. On the right front control valve, (in front of the right wheel) attach the hose to the bleeders and release any pressure as for the struts. Re-close lightly.

5. On the Right front control valve, locate the main pressure bleed screw, which is held with a lock nut. Loosen the lock nut and loosen the screw by turning it counterclockwise to release any system pressure. This screw is often very tight. If necessary loosen the entire bleed screw assembly - it has an O-ring seal to the valve body. Retighten the screws and lock nuts.

6. The front valve accumulator is smaller diameter, but longer than the rear one, and faces forward toward the coolant reservoir. There is enough clearance to remove the accumulator, but may not be enough clearance to re-install it after the recharge valve is added without making some temporary installation space. It is sometimes easier to loosen/remove the coolant reservoir or remove the entire valve assembly. To remove the coolant reservoir, simply loosen and disconnect things. To remove the valve assembly, simply loosen and disconnect the hydraulic lines from the valve assembly at the joints under the front end. These are flare joints and do not have sealing rings. Disconnect the electrical connection, remove the attaching bolts and lower the valve assembly out. Unscrew the accumulator. A drip pan is essential. Not much oil leaks out, but a little goes a long way.

7. The pump output balancing accumulator is located above the front frame in the center. Simply disconnect the hydraulic lines and remove the bolts attaching the accumulator and its mounting plate to the frame. Then disconnect the electrical connector and slip the accumulator and mounting assembly out. Take note of how the mounting plate and assembly are arranged and bolted in place so you can reinstall it without pulling your hair out. Itís not difficult, just not as simple as the others are. When the unit is out, unbolt the accumulator from its mounting bracket. REMOVE the pressure switch by unscrewing it. DO NOT SHIP IT WITH THE SWITCH ATTACHED-- IT WILL BREAK!! Keep it in a safe place for re-installation.

8. In all cases, re-installation is the reverse of removal. Nothing exotic or special. Reinstall any sealing rings back, lubricating them with some of the suspension fluid. Cleanliness is important. Do not get dirt or trash into your system!