Brake and Air System Maintenance Instructions (Cont)
1 1 - 1 2 . B R A K E R E L A Y V A L V E S R E M O V A L / I N S T A L L A T I O N ( C O N T ) .
Some vehicles have two nuts, lockwashers,
and screws. Others have two flanged nuts
Remove two nuts (19),
lockwashers (20), screws (21), and
Remove two screws (22),
lockwashers (23), and bracket (24).
Remove double check valve (8).
Left Rear Brake Relay Valve Installation (M978).
Coat threads with pipe thread sealing
compound and install double check
Install bracket (2) with two screws (3)
and lockwashers (4).
Some vehicles have two nuts,
lockwashers, and screws. Others
have two flanged nuts and screws.
Install bracket (5) with two screws (6),
lockwashers (7), and nuts (8).