TRAILER MAINTENANCE

BRAKES

Trailer brakes should be inspected the first 200 miles of operation.This will allow the brake shoes and drums to seat properly. After the fi rst 200 mile interval, inspect the brakes every 3,000 miles. If driving over rough terrain, inspect the brakes more frequently.

Figure 60 displays the major hydraulic surge brake components that will require inspection and maintenance. Please inspect these components as required using steps

1 through 8 and Table 13 as listed below:

Brake Adjustment

1.Place the trailer on jack stands. Make sure the jack stands are placed on secure level ground.

2.Check the wheel and drum for free rotation.

3.Remove the adjusting hole cover from the adjusting slot at the bottom brake backing plate.

4.With a screwdriver or standard adjusting tool, rotate the star wheel of the adjuster assembly to expand the brake shoes.

5.Adjust the brake shoes outward until the pressure of the lining against the wheel drum makes the wheel diffi cult to turn.

6.Adjust, rotate the star wheel in the opposite direction until the wheel rotates freely with slight lining drag.

7.Replace the adjusting hole cover and lower the trailer to the ground.

8.Repeat steps 1 through 7 on the remaining brakes.

Hydraulic Surge Brakes

Hydraulic surge brakes (Figure 62) should not require any special attention with the exception of routine maintenance such as shoe and lining replacement. Brake lines should be periodically checked for cracks, kinks, or blockage.

Figure 62. Hydraulic Brake Components

Actuator

Hydraulic surge braking requires the installation of an actuator at the tongue of the trailer. Remember the surge or push of the trailer toward the tow vehicle automatically synchronizes the trailer brakes with the tow vehicle brakes. As the trailer pushes against the tow vehicle the actuator telescopes together and applies force to the master cylinder, supplying hydraulic pressure to the trailer brakes.

Periodically check and test the surge“actuator”to make sure that it is functioning correctly. Never use an undersize actuator.

Table 13. Hydraulic Brake Troubleshooting

 

Symptom

Possible Cause

Solution

 

 

No Brakes

Brake line broken or kinked?

Repair or replace.

 

 

 

Brake lining glazed?

Reburnish or replace.

 

 

Weak Brakes or Brakes Pull to

Trailer overloaded?

Correct weight.

 

 

 

 

 

 

Brake drums scored or grooved?

Machine or replace.

 

 

One Side

 

 

 

 

 

 

Tire pressure correct?

Infl ate all tires equally.

 

 

 

 

 

 

 

 

 

 

 

Tires unmatched on the same axle?

Match tires.

 

 

 

 

 

 

 

 

Brake components loose, bent or

Replace components.

 

 

Locking Brakes

broken?

 

 

 

 

 

 

Brake drums out-of-round?

Replace.

 

 

Noisy Brakes

System lubricated?

Lubricate.

 

 

Brake components correct?

Replace and correct.

 

 

 

 

 

 

Brake lining thickness incorrect or

Install new shoes and

 

 

Dragging Brakes

not adjusted correctly?

linings.

 

 

Enough brake fl uid or correct fl uid?

Replace rubber parts

 

 

 

 

 

 

fi ll with dot 4 fl uid.

 

 

 

 

 

 

 

 

 

 

DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 43

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Multiquip DCA250SSIU manual Brake Adjustment, Hydraulic Surge Brakes, Actuator
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DCA250SSIU, DCA250SSI specifications

The Multiquip DCA250SSI and DCA250SSIU are powerful diesel generators designed to meet the demanding energy needs of various industries. These models are specifically engineered for reliability, efficiency, and performance, making them suitable for commercial applications, construction sites, and emergency backup power.

One of the standout features of both the DCA250SSI and DCA250SSIU is their impressive power output. Each model is capable of delivering 250 kVA, allowing users to run multiple equipment and tools simultaneously without worrying about power shortages. This makes them ideal for large-scale operations where consistent power is critical.

Both generators are equipped with a robust industrial-grade engine, ensuring long-lasting performance and durability. The DCA250SSI features a Kohler 4038T, whereas the DCA250SSIU includes a Yanmar engine. These engines are designed to operate efficiently under heavy loads while minimizing fuel consumption. The advanced design helps reduce emissions, making these models environmentally friendly.

The DCA250SSI and DCA250SSIU come with a sound-attenuated enclosure, which significantly reduces noise levels during operation. This design makes them suitable for use in urban settings or noise-sensitive environments, allowing businesses to comply with regulations without compromising on power supply.

Furthermore, both models integrate advanced technologies to enhance user experience. The digital controller allows for easy monitoring and control of the generator's performance, providing crucial information such as voltage, frequency, and engine parameters in real-time. This feature helps operators stay informed of the system's status and facilitates timely maintenance when needed.

Safety is another critical consideration in the design of these generators. The DCA250SSI and DCA250SSIU include a comprehensive range of safety features, such as low oil pressure shutdown, high-temperature shutdown, and overcurrent protection, ensuring reliable operation while safeguarding against potential hazards.

Versatility is key with these models. They can be configured for both single-phase and three-phase output, catering to diverse energy requirements across different applications. Additionally, their compact design makes them easy to transport and install, further enhancing their appeal for rental companies and on-the-go operations.

In conclusion, the Multiquip DCA250SSI and DCA250SSIU stand out in the generator market with their blend of power output, fuel efficiency, noise reduction, and advanced technologies. Their robust design and safety features make them a reliable choice for a wide array of industries, offering peace of mind and consistent energy wherever it's needed.
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