Can a Disc Brake Master Cylinder be Used with Drum Brakes on a Trailer

Question

Question:

I bought Master Cylinder for Titan Actuators - Disc Brakes part # T4747100 , but my trailler has drum brakes cylinder #DX66FR.Can i install disk brakes cylinder ? If not , what is different between part# T4747100 and #DX66FR...Thanks !

asked by: Viesturs

0

Expert Reply:

You would not want to use a disc brake master cylinder with drum brakes because the psi rating is much higher for disc brakes. Using it on drum brakes can lead to damage to the wheel cylinders and very aggressive braking.

The master cylinder for the drum brakes is # DX66FR. Drum brake master cylinders have a check valve on the inside that regulates the psi going through the brake lines. This is not something that you can add to the disc brake master cylinder. You would either have to get the correct master cylinder or switch to disc brakes. The easiest solution, and the most cost effective, would be just to get the correct master cylinder # DX66FR.

expert reply by: Michael H

0

Howard B.

8/2/2020

I have front wheel Disc & rear wheel drum what master cylinder do I order?

Reply

Chris R.

8/11/2020

Ideally you really should have the same style on each axle, whether you decide to go all drum or all disc, but if you really want to keep your existing setup your best option would be a master cylinder or actuator for drum brakes. It likely won't provide quite enough power for the disc brakes to perform optimally, but otherwise a disc brake master cylinder could blow out the drum brakes because of the excess pressure.

Reply

Answer 1

Thanks for the photos. It is clear you have a Titan brake actuator like the Brake Actuator with Manual Lockout - Bolt On - Drum - 2" Ball - 7,500 lbs #T63FR. It sounds like you need the Replacement Master Cylinder Assembly for Titan/UFP…

view full answer...

Answer 2

Thank you so much for the pictures! Those helped out tremendously. Based on the pictures the correct replacement cover for you is the part #T4324600 which is designed for surge brake actuators rated for 7,000 lbs and use a multi-ball coupler style…

view full answer...

Answer 3

First, lets start with master cylinder replacement. The recommendation you got for replacing the complete actuator, is most likely a good idea because there is a reason for the crud and such that you are finding in the master cylinder and replacing…

view full answer...

Answer 4

The only way to turn a surge brake actuator "off" is to engage a lockout on the actuator. Some actuators have manual lockouts, others have electric lockouts, and some have no way to lock out the actuator. Typically, free-backing brakes are…

view full answer...

Answer 5

Look at the side of the master cylinder and you'll be able to tell which type of brakes it is designed for by the number. If you see 23744 stamped into the side of it you have a drum brake model. If you have 25744 stamped in the side it's for…

view full answer...

Answer 6

Your trailer must have free backing brakes if you have never used the surge brake actuating coupler reverse lockout. If you did not have free backing brakes, your brakes would most likely brake even if they didn't lock up when you back up because…

view full answer...

Answer 7

Yes, the Titan shock part #TK71-758-00 is the correct replacement for the UFP A-60 you have on your trailer currently.

view full answer...

Answer 8

I pulled both the #DX66FR and the #T4747100 that you referenced to check out and found a way for you to determine which you have. You will need to remove the red plug from the end opposite of the plunger and look down into that hole. If you see what…

view full answer...

Answer 9

A brake actuator with a manual lockout, like part #T63FR, will have a lockout lever on the actuator that prevents the internal spring and shock from engaging the master cylinder when backing up (see photo). A no lockout brake actuator, like part…

view full answer...

Answer 10

A hydraulic or surge coupler isn't adjustable for the weight of the trailer but strangely enough, they don't need to be. The brakes would certainly be more effective if there were more weight on the trailer, but conversely a lighter trailer…

view full answer...

Answer 11

There is no specific torque rating for shackle bolts. You'll want to ensure that the bolts you use are long enough so that when installed you will have at least 2 threads protruding from the nut. Make sure that the bolt you're using has a…

view full answer...

Answer 12

Electric brakes, like the Dexter Nev-R-Adjust Electric Trailer Brake Assembly #23-458 that you referenced, are actually becoming more and more common on boat trailers. They used to not be so common because water and electricity don't play nice…

view full answer...

Can a Disc Brake Master Cylinder be Used with Drum Brakes on a Trailer

Products Referenced in This Question

Product Page this Question was Asked From

Continue Researching