TM 5-3805-280-24-1
Tests
NOTE: Initial procedure is to adjust the load adjusting
cartridges (L) to match the two pumps before
making the final adjustment to get the combined
pump engine pulldown at medium pressure.
Hydraulic pressure increases as the load adjusting
cartridges are turned in because the pump flow is
increasing.
h. Turn the load adjusting cartridge (L) on front pump
regulator in until engine speed just starts to
decrease. Then, slowly turn the load adjusting
cartridge out and in to verify the exact point where
engine speed starts to decrease (0--10 rpm).
i. Turn the load adjusting cartridge (L) on rear pump
regulator in until engine speed just starts to
decrease. Then, slowly turn the load adjusting
cartridge out and in to verify the exact point where
engine speed starts to decrease (0--10 rpm).
j. Release both propel functions.
NOTE: To avoid heating the oil excessively, only operate
the propel functions over relief to check the
pulldown after each adjustment of cartridge.
9025
J--13 mm Nut
k. Turn both load adjusting cartridges (L) in equal
25
K--Load Adjusting Screw
amounts. Start with 1/4 turn.
110
L--Load Adjusting Cartridge
M--30 mm Nut
l. Actuate and hold both propel functions over relief to
check that engine pulldown speed is 2070--2080
rpm. Record the rpm reading. Release propel
functions.
Load Adjusting Cartridge (Outer Spring)--Combined Pump
Engine Pulldown--Specification
Speed ...................................................... 2070--2080 rpm at 17 235 kPa
(172 bar) (2500 psi)
with tracks stalled
m. Hold the cartridge and tighten large nut on both
regulators.
Continued on next page
TX,9025,GG2661 1906MAY978/14
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