Wingate Motors' PBR power brake towing equipment for caravans, boat trailers, horse boxes and any other type of trailer with any axle configuration insures reliable, safe trailer braking under all conditions. Insufficient control over your trailer's brakes can lead to the dreaded "tail wagging" (also known as "snaking") and in extreme cases to "jackknifing". Other, less dangerous but still seriously problematic, problems can occur during up-hill starts and during down-hill runs, when you may loose partial or total control over your vehicle and/or trailer. The results of such an event may vary to a peaceful vacation turning into a nightmare, to injury or death.
PBR trailer braking systems give you automatic and simultaneous braking action on both the towing vehicle and the trailer when applying the foot brake. Shown in the illustration here is the PBR TV2381A kit which is installed to control the trailer brakes, be they mechanical or hydraulically operated. This is a single line, air suspended and hydraulic type installation kit.
When installed, and in conjunction with either trailer kit TV2340 or TV2341 with a VH116 hydraulic booster, this system will allow more effective braking control at the driver's fingertips through the use of the PV109 hydraulic vacuum control valve. He/she will be able to correct the balance of braking required between car and trailer.
All PBR trailer braking systems are vacuum assisted brake systems for use with both mechanical and hydraulic trailer brakes.
The TV2381SA car section will, when the towing vehicle's brakes are applied, automatically operate the trailer brakes with the use of the vacuum-hydraulic PV109 control valve, which is interconnected with the existing hydraulic brake system of the car, together with a vacuum hose which is interconnected with the existing booster vacuum hose or engine, and exits at the rear of the towing vehicle to a sealed vacuum female connector.
The balance (or ratio) between the car and trailer brakes can be varied to suit all road and load conditions by the turning of the control handle, which is connected to the PV109 valve (see Fig. 3). Turn the control handle clockwise to increase the effect of the trailer brakes, or anti-clockwise to decrease it.
The hand-operated control handle/lever is fitted in the drivers' compartment and, when used independently, applies the trailer brakes only, overriding all foot control settings. This is a very important safety feature in case of trailer sway, as by pulling on the hand lever only (no foot brake action required) this action will apply only the trailer brakes. This will help, in case you ever get into a swaying motion, to prevent a jack-knife / tail-wagging situation from occurring.
The PV109 hydraulic reaction valve (see above, left) is mounted in the engine compartment in a convenient position to allow the control cable to be fed through the firewall in the engine compartment, connecting it to the control handle assembly situated in the driving compartment, and to the car hydraulic system.
The T659 vacuum reserve tank, which is fitted with a safety vacuum non return valve, is also fitted n the engine compartment, and is interfaced with the vacuum pipe connected to the brake booster and/or engine inlet manifold. This will guarantee that there is always a vacuum available to activate the brake chamber fitted to the trailer, even if the engine stalls or cuts out.
Types of Trailer Braking Installations
Mechanical type installation with the TV2340 installation using the B330R vacuum chamber:
Hydraulic type installation using the VH116 unit. This specially developed unit puts out hydraulic pressure using vacuum applied from the TV2381SA when installed:
Breakaway with automatic stop using the PV48A interfaced with either the mechanical or hydraualic installations in conjunction with a large vacuum reservoir tank. This system is mandatory in certain installations, e.g. horse boxes or live stock trailers and in certain weight loads:
|(PV48A)||(TV2361 mechanical installation)||(TV2354 hydraulic installation)|
Trailer configurations of single or dual axles whether mechanical or hydraulic braking systems use either of these assemblies. The TV2340 type is used on mechanical axle applications and the TV2341 - VH116 on hydraulic axle applications.
Electric vacuum pump kit #5202000 provides a primary or secondary source of vacuum and is ideal for all diesel driven vehicles. See our Iruna pump for details.