Component Service; Hydraulic Valve Replacement; Checking Speed Sensor Air Gap; Valve Removal/Installation - Dodge D150 1990 Service Manual

BRAKES 5 - 61
COMPONENT S E R V I C E
INDEX
Page
Checking Speed Sensor Air Gap . . . 61
Electronic Control Module Replacement 61
General Service Information 61
Hydraulic Valve Replacement 61
Page
Specifications 63
Speed Sensor Replacement 61
Tightening Reference 64
GENERAL SERVICE INFORMATION
The rear wheel anti-lock ( R W A L ) components are
serviced as assemblies only. The module, anti-lock
h y d r a u l i c control valve, speed sensor a n d exciter r i n g
are n o t repairable. These components m u s t be r e -
placed i f diagnosis indicates a fault.
HYDRAULIC VALVE REPLACEMENT
VALVE REMOVAL
(1) Raise vehicle.
(2) Disconnect valve-to-sensor harness connector.
Refer to F i g . 10, on page 5-16 for valve m o u n t i n g .
(3) Disconnect brake lines connecting h y d r a u l i c
valve to r e a r brakes and t o combination valve.
(4) Remove h y d r a u l i c valve a t t a c h i n g screws and
remove valve f r o m frame bracket.
VALVE INSTALLATION
(1) S t a r t b r a k e lines i n h y d r a u l i c valve.
(2) Position valve on frame bracket.
(3) I n s t a l l and t i g h t e n valve a t t a c h i n g n u t s t o 22-
34 N«m (16-25 ft-lbs) torque.
(4) T i g h t e n valve brake lines.
(5) Bleed t h e h y d r a u l i c v a l v e and brakes. Refer to
procedure i n Service Adjustments section.
(6) Lower vehicle.
CHECKING SPEED SENSOR AIR GAP
(1) Remove sensor f r o m d i f f e r e n t i a l .
(2) Measure and record distance f r o m underside o f
sensor flange to end of sensor pole piece (Fig. 12).
Distance should be 27.17 t o 27.43 m m (1.07 to 1.08
in). T h i s measurement represents dimension B .
(3) Measure distance between sensor m o u n t i n g sur-
face o f differential case a n d t e e t h a t top o f exciter
r i n g (Fig. 13). distance should be 1.085 t o 1.12 i n c h .
This distance represents dimension A .
(4) Subtract dimension B f r o m dimension A t o de-
t e r m i n e sensor a i r gap w h i c h is dimension C (Fig.
12).
SENSOR MOUNTING FACE
SENSOR FLANGE
DIMENSION A
DIMENSION B
DIMENSION C
DIMENSION B
EXCITER RING
SENSOR POLE
PIECE
8905-34
Fig. 12 Checking Sensor Air Gap