TM 5-3810-300-24 & P2
Illustration 4-30. Range Control Valve Disassembly.
With the range control in "LOW" position, disconnect the two lines connected to port "R" and "F". There should be
no air coming out of these ports.
Move the range control to "INTER". There should now be a steady flow of air coming from the "F" port, but still no
air coming from the "R" port.
Move the range control valve to the "DIR", position. There should now be a steady flow of air coming from both the
"F" and "R" ports.
If the above results are not obtained, disconnect the supply air line at the "S" port and make sure that a steady flow
of air is coming through the line. If air is present, this would indicate a faulty control valve. Cause can be defective
parts, damaged O-ring of loose top plate screw.
Any steady flow of air from the range control valve exhaust port indicates a faulty range control valve or incorrect
hook-up. Cause can be damaged O-ring, defective parts, loose top plate screw or reversed air lines on the control.
Air Valve and Filter Assembly.
The air regulator is not serviceable. If defective replace. Reading at output of air regulator should be 57 to 62 psi.
Disassemble air filter in accordance with index numbers (B). Reassembly is the reverse if disassembly.