Speed sensor
Removal
1. Loosen the lock nut using a 11/16 in hex wrench.
2. Unscrew the speed sensor (B83) from the pump housing. Remove and discard the O-ring (B83A).
Reassembly
1. Install a new O-ring before reinstalling the sensor.
2. Reinstall the speed sensor (with lock nut and O-ring) into the housing. Adjust the gap between the
sensor and the magnetic speed ring as instructed in Speed sensor adjustment (page 46) and torque
the sensor lock nut to 13 N•m [10 lbf•ft].
3. If a speed sensor is not installed, use a 1/4 in internal hex wrench to torque the housing plug (B83) to
40 N•m [30 lbf•ft].
Service Manual
Series 90 Pumps
Minor repair
66 520L0818 • Rev 0101 • August 2015
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