Spicer Drive Axles Application Guidelines - Manual (Page 83)

AXAG-0200 June 2009 83
Wheel Differential Lock
The Dana Wheel Differential Lock is a optional
feature for Dana Axles. In operation, it positively
locks the wheel differential, to provide improved
traction under adverse road conditions.
The differential lock is driver-controlled through an
electric switch or air valve mounted in the cab. The
locking mechanism is air-operated to engage a
mechanical clutch and lock the wheel differential.
It is spring-operated to disengage the lock and
permit the wheel differential to function normally.
The wheel differential lock consists of three major
assemblies.
•
Shift Cylinder Assembly:
Operates a shift fork
and push rod assembly
•
Shift Fork and Push Rod Assembly:
Engages
and disengages the differential lock curvic clutch
assembly.
•
Curvic Clutch Assembly:
Consists of a sliding
clutch splined to a axle shaft and a fixed clutch
which is splined to the differential case hub.
The differential lock also includes a selector switch
(electric) which senses clutch engagement and sends an
electrical signal to a cab mounted indicator light (or an
audible signal device).
1 - Sliding Clutch
2 - Spring
3 - Clutch fork
4 - Piston and rod
5 - O-ring
6 - Piston cover
7 - Washer
8 - Switch
9 - Pin
10 - Carrier