trailer Drum Brake Clusters brake backing plates | Pacific Trailers

Backing Plates - Hydraulic

Trailer Drum Brake Backing Plates

Hydraulic trailer brake assemblies, backing plates, brake shoes & springs. 10", 12" and 12 1/4" sizes. Ready to bolt on to your trailer axle brake mounting flange. Hydraulic trailer brake systems use one or more pair of brake assemblies, brake drum / hub assemblies, hydraulic brake actuator and a brake line kit.  An Electric over hydraulic brake actuator can also be used.

Foundation Brake assemblies (backing plate, brake shoes & springs) come in 10" & 12" sizes with the two most common being UNI-SERVO and FREE BACKING. 'Uni-Servo' brakes have 20% braking power in reverse, therefore they are recommended to be matched with a Hydraulic Brake Actuator that is designed with a Reverse Lock Out for backing up inclines or over soft ground.  Free Backing brakes use a design that allows the trailer to roll free when backing up, they have no braking power in reverse.

Pacific Trailers, 888-479-6920

Quantity Description Price
Marine Grade Free-Backing Brake Assembly (10" Left) #32681L

Galva-Tech Marine Grade 10" Free Backing Left Brake Assembly.  Aluminum Wheel Cylinder and all Stainless Springs.

$49.95
Marine Grade Free-Backing Brake Assembly (10" Right) #32681R

Galva-Tech Marine Grade 10" Free Backing Right Brake Assembly.  Aluminum Wheel Cylinder and all Stainless Springs.

$49.95
10" Free-Backing Left Brake Assembly. #HYDRAULIC/SURGE BRAKE/10"L-Painted

Black-painted drum brake assembly lets you reverse without actuating. Designed for use with hydraulic brake actuators that do not include reverse lockouts. Fits most 13", 14" and 15" wheels.

$44.95
10" Free-Backing Right Brake Assembly. #HYDRAULIC/SURGE BRAKE/10"R-Painted

Black-painted drum brake assembly lets you reverse without actuating. Designed for use with hydraulic brake actuators that do not include reverse lockouts. Fits most 13", 14" and 15" wheels.

$44.95
Uni-Servo Left Brake Assembly, 10" #32434L

Black-painted drum brake assembly fits most 13", 14" and 15" wheels and features a single-plunger design.

$39.95
Uni-Servo Right Brake Assembly, 10" #32434R

Black-painted drum brake assembly fits most 13", 14" and 15" wheels and features a single-plunger design.

$39.95
Galva-Tech Marine Grade 12" Free-Backing Left Brake Assembly. #HYDRAULIC/SURGE BRAKE/12"L-Galvanized

Galva-Tech Marine Grade 12" Free Backing Left Brake Assembly.  Aluminum Wheel Cylinder and all Stainless Springs.

$87.95
$54.95
Galva-Tech Marine Grade 12" Free-Backing Right Brake Assembly. #HYDRAULIC/SURGE BRAKE/12"R-Galvanized

Galva-Tech Marine Grade 12" Free Backing Right Brake Assembly.  Aluminum Wheel Cylinder and all Stainless Springs.

$87.95
$54.95
12" Free-Backing Left Brake Assembly. #HYDRAULIC/SURGE BRAKE/12"L-Painted

Black-painted drum brake assembly lets you reverse without actuating. Designed for use with hydraulic brake actuators that do not include reverse lockouts. Fits most 14 1/2", 15" and 16" wheels.

$49.95
12" Free-Backing Right Brake Assembly. #HYDRAULIC/SURGE BRAKE/12"R-Painted

Black-painted drum brake assembly lets you reverse without actuating. Designed for use with hydraulic brake actuators that do not include reverse lockouts. Fits most 14 1/2", 15"  and 16" wheels.

$49.95
UPF 12" Uni-Servo Left Brake Assembly. #32659L

Black-painted drum brake assembly fits most 14-1/2", 15" and 16" wheels and features a single-plunger design.

$44.95
UFP 12" Uni-Servo Right Brake Assembly. #32659R

Black-painted drum brake assembly fits most 14-1/2", 15" and 16" wheels and features a single-plunger design.

$44.95
UFP Electric Brake Assy. 10" x 2 1/4" Left Hand 3500lb. #32654L

UFP 10" x 2-1/4" Left Hand complete electric brake assembly. Mounts to 4-hole axle brake flange with bolt holes on 2-7/8" center.  Mounting studs included. 
This brake is rated to a maximum capacity of 3500 lbs. per pair. (Green Wire Magnet)

$64.95
$44.95
UFP Electric Brake Assy. 10" x 2 1/4" Right Hand 3500lb. #32654R

UFP 10" x 2-1/4" Right Hand complete electric brake assembly. Mounts to 4-hole axle brake flange with bolt holes on 2-7/8" center.  Mounting studs included. 
This brake is rated to a maximum capacity of 3500 lbs. per pair. (Green Wire Magnet)

$64.95
$44.95
UFP Electric Brake Assy. 12" Left Hand 5200lb. #32655L

UFP 12" x 2" Left Hand complete electric brake assembly. Mounts to 5-hole axle brake flange.
This brake is rated to a maximum capacity of 5200 lbs. per pair. (White Wire Magnet)

$47.95
Electric Brake Assy. 12" Right Hand 5200lb. #32655R

UFP 12" x 2" Right Hand complete electric brake assembly. Mounts to 5-hole axle brake flange.  This brake is rated to a maximum capacity of 5200 lbs. per pair. (White Wire Magnet)

$47.95
Aluminum Wheel Cylinder for 10" & 12" Drum Brakes (Left). #37202

This all aluminum wheel cylinder fits standard 10" and 12" Free-Backing and Uni-servo drum brake backing plate assemblies.  Designed specifically for use in the marine environment, this wheel cylinder is sure to outlast the life of standard cast-iron models.

$24.95
$19.95
Buy Now Aluminum Wheel Cylinder for 10" & 12" Drum Brakes (Right). #37203

This all aluminum wheel cylinder fits standard 10" and 12" Free-Backing and Uni-servo drum brake backing plate assemblies.  Designed specifically for use in the marine environment, this wheel cylinder is sure to outlast the life of standard cast-iron models.

Trailer Brake Wheel Cylinder for 10" & 12" Drum Brakes (Right) #977600

Single servo wheel cylinder. Will fit on 10" and 12" trailer drum brakes with single servo. Right and Left side available.

$17.95
Trailer Brake Wheel Cylinder for 10" & 12" Drum Brakes (Left) #977700

Single servo wheel cylinder. Will fit on 10" and 12" trailer drum brakes with single servo. Right and Left side available.

$17.95
Hydraulic Brake Adjuster Screw 10"

Hydraulic Brake Adjuster Screw for 10" Brakes.

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$8.95
Hydraulic Brake Adjuster Screw 12"
$9.95