Unbolt the slave valve from transmission side. If possible, leave air lines attached to slave valve. The gauge rapidly moves between 58-63 PSI and 0 PSI. Check for a pinched or obstructed air line between the slave valve and the “S” port on the shift knob.Ħ. Check for a pinched or obstructed 1/4″ rubber air line between the filter/regulator and slave valve.ĥ. Check for a plugged or dirty filter in the filter / regulator assembly.Ĥ. Check for a restricted line between the shift knob and slave valve.ģ. The gauge should show rapid pressure change.ġ. Move the range selector back and forth from low to high range. Install a 100 PSI pressure gauge in line with the “P” line. If the lines are correct, replace the shift knob.Ĭheck for air flow from the “P” port on the slave valve. Confirm that the air lines are connected to the correct ports at the shift knob.Ģ. Check for air flow from the disconnected line.ġ. At the slave valve, remove the air line from the “P” port. At the shift knob, move the range selection lever up to select high range. Check for a pinched or obstructed 1/4″ rubber air line between the slave valve and the test gauge.Ĥ. Check for a pinched or obstructed 1/4″ rubber air line between the filter/regulator and slave valve.ģ. Check for a plugged or dirty filter in the filter/regulator assembly.Ģ. Pressure does not change rapidly at gauge.ġ. Pressure rapidly changes between 58-63 PSI and 0 at the gauge.Īir system appears to be operating satisfactory. Does the pressure measured at the gauge respond rapidly when going from high to low? Have an assistant move the range selector up and down between low and high range. Replace the filter/regulator and check for proper range operation.Ĭonfirm that shift lever is still in neutral. The gauge reads pressure but is lower than 58 PSI or higher than 63 PSI. With the shift lever in neutral, move the range selector down to select low range. Install a 100 PSI air gauge in the disconnected air line end. Remove range cylinder cover and repair leaking range piston or piston seal.Ĭheck for air flow from the disconnected air line. Check for air flow from the low range port. At the rear of the transmission, disconnect the 1/4″ rubber air line from the low range supply port on the range cylinder. Move range selector up to high range position. See beginning of Air System Troubleshooting section. Go to the other corresponding symptom first. Check for constant air leakage at the shift knob, slave valve, and transmission caseīreather when both low and high range have been selected. If the line is properly attached, check that the insert valve (old style) is properly installed (stem facing inward) and that the insert valve bore is not defective. Check to make sure the “SP” line is connected to the splitter cylinder cover.Ģ. Check for air flowing from the SP port on the shift knob.ġ. Move the range selector down to low range and move the splitter button rearward. If properly connected, replace the slave valve.Īir is not leaking from either port or disconnected air line. Verify that the air line is connected to the slave valve “p” port.Ģ. Check for air flow from theĬonstant air is leaking from the “P” port or the “E” port.Īir is coming out of the disconnected air line.ġ. Disconnect the small air line connected to the “P” port of the shift knob. Move the range selector up to high range. Check for constant air flow from the exhaust “E” port. Move the range selector lever down to low range. Remove lower skirt on shift knob. Check for leaking fitting at the shift knob.Ĭheck air lines to make sure all lines are connected to the proper ports on the shift knob.Īir lines are not connected to the proper portsĪ.) Reversal of “S” and “P” lines will result in a constant leak from the exhaust when high range is selected.Īir lines are connected to the proper ports.ī.) Reversal of the H/L and “SP” lines will result in a constant leak when the splitter button is rearward. Fault Code Fault Code Isolation Procedure.Troubleshooting Eaton Fuller Transmission Bearings.Troubleshooting Eaton Transmission Gears and Shafts.Eaton Fuller 7 Speed Transmission Ratios.
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