Spicer Tandem Drive Axles Pro-40 Single Reduction and Single Reduction with Differential Lock - Manual (Page 15)

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Forward Assembly
Inter-Axle Lockout Types - Forward
Parts Exploded View
Air-operated to engage the lockout and spring-released to disengage the lockout.
1 - Compression spring
2 - Shift fork
3 - O-ring 4 - Piston
5 - O-ring
6 - Piston Cover
1 2
3
4
5
6