Will Removing Check Valve on Master Cylinder Keep Brakes from Engaging When Backing Up

Question

Question:

I read the article and watched the video and understand the process. What is the purpose of this procedure? Is it so you can back up without the brakes engaging? I noticed you have an electric lock out valve does this perform the same function as removing the check valve?

asked by: Mark H

0

Expert Reply:

Removing the check valve from the master cylinder for hydraulic drum brakes, like part # T1777401, enables it to put out a greater psi rating so that it will be compatible with hydraulic disc brakes that require the higher psi rating.

If you are mechanically inclined and you carefully reassemble the master cylinder then you can remove the check valve. However, if you are less mechanically inclined then it would be better to replace the drum master cylinder with a disc master cylinder, like part # T1777405, or completely change out your actuator. The only difference between the two master cylinders that I have linked is the check valve.

This will not disengage the surge brakes on your trailer when you backup, but we do have a way for you to do that. By adding the Solenoid Valve # T4748800 to your model 6 Titan actuator you can lockout the actuator when you put your vehicle in reverse. I also recommend adding the Solenoid Shield # T4836800183 to your actuator so that the solenoid is protected.

To activate your solenoid you can install the 5-Way Flat Trailer Wiring Kit # HM47890 and simply connect the 5th wire to the reverse light circuit on your vehicle and then on the trailer side connect the 5th wire to either of the solenoid wires. The other solenoid wire will need to be grounded to a clean, bare-metal surface on your trailer. The wires on these are color-coded as follows:

White - Ground
Brown - Parking/Tail Lights
Yellow - Left Turn/Stop
Green - Right Turn/Stop
Blue - Reverse

If you already have 7-Ways on your vehicle and trailer then you simply need to connect the solenoid to the reverse circuit which should be the middle pin.

expert reply by: Jon G

0

Answer 1

If you remove or puncture the metal check valve from your current master cylinder you will essentially have a disc brake master cylinder. What you will need to do is remove the large snap ring from the front of your actuator where the brake line…

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Answer 2

I do have an option for you but we don't offer any direct bolt-on swap options for the Tie Down Engineering LP7000 Actuator due to the age. That said, we do have plenty of great replacement options like the Dexter DX7.5L A-60 Brake Actuator part…

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Answer 3

I do see many of the 2009 Ranger Trail trailers allow you to use a replacement Inner Member. You will need to match these with your specific actuator and either Disc #DX99FR or Drum #DX97FR brakes. If you can tell me exactly what model number…

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Answer 4

While we don't have replacement parts for a Model 70LP actuator, we do have a great replacement for it. Like the 70LP, these actuators are a fit for a 2" hitch ball, but they just have a slightly larger capacity at 7,500 lbs. You didn't…

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Answer 5

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 6

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 7

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Answer 8

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 9

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 10

The #84 spindle is just a common way to identify the spindle dimensions typically used for 3,500 lb axles. So instead of listing out the parts, people can just say they have #84 spindles and it's easier to know what fits it. The CE Smith Trailer…

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Answer 11

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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Answer 12

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Will Removing Check Valve on Master Cylinder Keep Brakes from Engaging When Backing Up

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