Spicer Tandem Drive Axles Service Manual D__R440, 460, 480, D_R461, 462, 463, 521, 581, 601, 651, 652, 653 - Manual (Page 21)

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Differential Lockout
Differential Lockout
Differential Lockout
Inter-Axle Lockout Types
All are air-operated to engage the lockout and spring-released
to disengage the lockout with the exception of the “Reverse-
Air” lockout. The “Reverse-Air” lockout is spring-released to
engage the lockout and air-operated to disengage the lockout.
Cast Iron Cover Lockout - February 1996 to
Present (Single Reduction Models)
• External type lockout
• Cast iron piston cover
1 - Shift fork assembly
2 - Compression spring
3 - Piston driver
4 - O-ring 5 - Piston
6 - Lock nut
7 - Cast iron piston housing
8 - Capscrew
1 2 3 4 5 6 7
8