Brake Fluid Pump: Service and Repair
PUMP AND MOTOR ASSEMBLY AND PRESSURE PIPEPump Motor Assembly:
REMOVE OR DISCONNECT
1. With ignition "OFF" or negative battery cable disconnected, apply and release the service brake pedal a minimum of 25 times using approximately 222 N (50 lbs.) force on the pedal. A noticeable change in pedal feel will occur when the accumulator is completely discharged.
2. Electrical connector from pressure switch and pump and motor assembly.
3. Remove return hose and drain brake fluid reservoir into a suitable container and discard fluid.
4. Hydraulic accumulator and 0-ring.
5. High pressure pipe fittings connected to pump and motor assembly and main body.
6. Pressure pipe assembly and 0-rings.
7. Wire clip and pull supply hose fitting out of pump body.
8. Bolt attaching pump and motor assembly to main body.
9. Pump and motor assembly by sliding off of locating pin.
INSPECT
^ Insulators and if damaged or deteriorated, replace. Be sure to install new insulators.
INSTALL OR CONNECT
1. Return hose and fitting into pump body. Install wire clip.
2. Pump and motor assembly to main body.
3. Bolt to 8 Nm (71 lb. in.) attaching pump and motor assembly to main body.
4. Pressure pipe assembly.
5. Pressure pipe fittings to pump and motor assembly, and main body. Fittings to 14 Nm (124 lb. in.).
6. 0-ring and accumulator to body 43 Nm (32 lb. ft.).
7. Electrical connector to pump and motor assembly and pressure switch.
8. Negative battery cable.