Eaton TRSM0515, Service Manual

Page: 16 / 88

6. Check Point
D
With normal vehicle air pressure and gear shift
lever in the neutral position, pull the control button
up to high range and disconnect the low range air
line, either at fitting on range cylinder or at bottom
port of air valve.
a. Repeat procedures under Check Point C,
reversing the position of the control button in
order to check the low range operation.
7.
Check Point
E
If any of the seals in the range shift cylinder are
defective the range shift will be affected. The de-
gree of lost air will govern the degree of failure,
from slow shift to complete failure.
a. Leak at seal A or B as shown in diagram re-
sults in failure to shift into either low or high
range; steady leak out air valve breather in
both ranges.
b. Leak at seal C results in failure to shift into
low range; pressurizing of transmission.
Check Point E„ Cross section of range shift cylinder, showing
location of seals.
Air Valve Pre-Selection
An actuating pin protruding from the shifting
the lever is moved to or through neutral. See
bar housing prevents the poppet slave valve
detailed installation of air valve for installa-
from moving while the gear shift lever is in a tion precaution concerning the actuating pin.
gear position and releases the poppet when
AIR SYSTEM