Spicer Drive Axles Service Manual Wheel Reduction Drive Axles (EA-50) - Manual (Page 26)

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DRIVER CONTROLLED DIFFERENTIAL LOCK DRIVER CONTROLLED DIFFERENTIAL LOCK DRIVER CONTROLLED DIFFERENTIAL LOCK DRIVER CONTROLLED DIFFERENTIAL LOCK DRIVER CONTROLLED DIFFERENTIAL LOCK
INTRODUCTION
The Spicer driver-controlled differential lock provides
exceptional traction and pulling power in both slippery
driving conditions and heavy-duty applications. Such
applications include: pulling double trailers, construction,
and refuse collection. In adverse road conditions, the
Spicer driver-controlled differential lock also protects
against spin-out and shock loading.
The differential lock is activated by a cab-mounted
switch. The lock operates through an air-actuated shift
assembly that is located on the right-side of the differen-
tial carrier. When the differential lock is engaged, an air-
actuated piston moves the clutch collar along splines of
the axle shaft onto mated splines of the differential case.
See F
See F See F See F See Figur igur igur igur igure 1 e 1 e 1 e 1 e 12. 2. 2. 2. 2.
When the differential case and clutch collar splines are
engaged, the wheel differential is positively locked. The
shift fork trips an electric switch unit that signals a cab
indiactor light for driver verification. There is no differ-
ential action between the rear drive wheels of the axle
when the differential is positively locked, resulting in
maximum traction to the rear drive wheels. Normal
differential action occurs between the rear drive wheels
of the axle when the differential lock is disengaged. The
cab-mounted indicator light should be off at this time.
Ring and Pinion Ring and Pinion Ring and Pinion Ring and Pinion Ring and Pinion
Gears Gears Gears Gears Gears
Axle Housing Axle Housing Axle Housing Axle Housing Axle Housing
Differ Differ Differ Differ Differential ential ential ential ential
Gears Gears Gears Gears Gears
Differ Differ Differ Differ Differential ential ential ential ential
Ca Ca Ca Ca Case Half se Half se Half se Half se Half
Spline Spline Spline Spline Splinesssss
Right Right Right Right Right-Side -Side -Side -Side -Side
Axle Shaft Axle Shaft Axle Shaft Axle Shaft Axle Shaft
Pist Pist Pist Pist Piston on on on on Plugged Hole (F Plugged Hole (F Plugged Hole (F Plugged Hole (F Plugged Hole (For or or or or
Manual Eng Manual Eng Manual Eng Manual Eng Manual Engagement) agement) agement) agement) agement)
V V V V Vehicle Air ehicle Air ehicle Air ehicle Air ehicle Air
Supply Inlet Supply Inlet Supply Inlet Supply Inlet Supply Inlet
Electric Switch Unit Electric Switch Unit Electric Switch Unit Electric Switch Unit Electric Switch Unit
Clutch Collar Clutch Collar Clutch Collar Clutch Collar Clutch Collar
(Eng (Eng (Eng (Eng (Engaged) aged) aged) aged) aged)
Shift F Shift F Shift F Shift F Shift Fork ork ork ork ork
DIFFERENTIAL LOCK IDENTIFICATION
FFFFFigur igur igur igur igure 1 e 1 e 1 e 1 e 12 2 2 2 2