Honda Civic/CRX/del Sol 1984-1995 Repair Guide

Modulator Unit/ALB/ABS Pump Assembly

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RELIEVING LINE PRESSURE



See Figures 1 and 2


CAUTION
The accumulator contains high-pressure nitrogen gas. Do not puncture, expose to flame or attempt to disassemble the accumulator or it may explode, resulting in severe personal injury.

This procedure is necessary before performing certain repairs on the ALB/ABS.

  1. Open the hood and remove the red cap from the modulator body.
  2.  
  3. Install the special tool, Bleeder T-Wrench, Honda part No. 07HAA-SG00101 on the maintenance bleeder and turn it slowly 90 degrees to collect the high-pressure fluid into the reservoir.
  4.  
  5. Turn the T-Wrench out one complete turn to thoroughly drain the fluid.
  6.  
  7. Retighten the maintenance bleeder, replace the red cap and safely discard the fluid.
  8.  



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Fig. Fig. 1: Hydraulic system connections



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Fig. Fig. 2: Caution: If the system is not properly bled beforehand and any of the shaded components are disconnected, high pressure fluid will spray. Shown is the proper location and tool for relieving line pressure from the modulator unit and accumulator before maintenance procedures are performed. Exercise great care when using the bleeder tool.

REMOVAL & INSTALLATION



See Figures 3 and 4


CAUTION
Before beginning this removal procedure, the high-pressure fluid must be properly bled from the maintenance bleeder. Refer to "Relieving Line Pressure" under the "Accumulator" section for this procedure.

The modulator unit/ALB/ABS pump assembly should not be disassembled if defective. The modulator unit should be replaced as an assembly.

  1. Remove the battery and battery tray.
  2.  
  3. Disconnect the solenoid, motor and pressure switch connectors.
  4.  
  5. Disconnect the brake pipes from the modulator unit.
  6.  
  7. Remove the mounting hardware. Then remove the modulator/ALB/ABS pump assembly from the frame.
  8.  

To Install:
  1. Replace the modulator/ALB/ABS pump assembly and connect with the mounting hardware.
  2.  
  3. Connect the brake pipes to the modulator unit.
  4.  
  5. Connect the solenoid, motor and pressure switch connectors.
  6.  
  7. Replace the battery tray and battery and bleed the system.
  8.  


WARNING
Do not bend or damage the brake pipes. Cover the hose joints with shop towels or rags to prevent spills. Before reassembling, ensure all parts are clean and free of dust and contaminants. Do not mix brands or grades of brake fluid and use only clean DOT 3 or 4 brake fluid. When reconnecting, ensure there is no interference between the brake pipes and other parts.



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Fig. Fig. 3: Modulator and ALB/ABS pump mounting



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Fig. Fig. 4: Modulator and ALB/ABS pump assembly

 
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