2. Roadranger Valve (See Page 34 and schematic on preceding page.)
With the gear shift lever in neutral, disconnect
the 1/8” O.D. air line at the Center Port of reduc- tion cylinder cover, making sure this line leads from the “SP” Port of control valve.
WHILE IN LOW RANGE, move the Deep Re- duction Button FORWARD. There should be AIR flowing from disconnected line. Move the button REARWARD to shut off air flow and re- connect air line.
If the preceding conditions did not exist, the control valve is defective, or there is a restric- tion in the air lines.
Reduction Cylinder (Refer to the following illus- tration.)
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 control valve and/or cyl- inder cover when Deep Reduction Button is in the FORWARD position.
Leak at gasket C results in a slow shift to dis- engage deep reduction gearing; steady flow of air to atmosphere.
4. Insert Valve (See page 37.) Any constant flow of air from exhaust port of cyl- inder cover usually indicates a faulty insert valve. Exhaust should occur ONLY BRIEFLY when Deep Reduction Button is moved FORWARD WHILE IN LOW RANGE. A faulty insert valve, leaking at the O-rings of valve O.D. or from inner seals will result in shift failure. Two indications of defective O-rings or seals are:
CONSTANT AIR flowing from exhaust port of cylinder cover.
CONSTANT AIR flowing from exhaust port “E” of control valve WHILE DEEP REDUC- TION BUTTON IS REARWARD (providing the control valve is operating properly).
The three O-rings in position on valve O.D. can be replaced. However, if an inner seal is damaged, the complete assembly MUST be replaced.