Deep Reduction Valve (See Air System Schematics.) With the gear shift lever in neutral, disconnect the air line leads from OUTLET of Deep Reduc- tion Valve.
WHILE IN LOW RANGE, move the Deep Re- duction Valve Lever to the “IN” position. There should be NO AIR flowing from discon- nected line.
Move the valve lever to the “OUT” position. There should now be CONSTANT AIR flowing from disconnected line. Return the valve lever to the “IN” position to shut off air flow and re- connect air line.
3. Reduction Cylinder (Refer to the following illustration.) If any of the seals in the reduction cylinder as- sembly are defective, the deep reduction shift will be affected. The degree of air lost will govern the degree of failure, from slow shifting to com- plete shift failure.
Leak at O-ring A results in a slow shift to engage deep reduction gearing; pressurizing of transmission case; deep reduction gearing can be disengaged.
Leak at O-ring B results in slow shifting or complete failure to engage and disengage deep reduction gearing; steady flow of air from exhaust port of Deep Reduction Valve when lever is in the “IN” position.
Leak at gasket C results in a slow shift to dis- engage deep reduction gearing; steady flow of air to atmosphere.
CONSTANT AIR from Air Filter/Regulator
REDUCTION CYLINDER ASSEMBLY (Models equipped with Deep Reduction Valve ONLY.)