TM 5-3805-260-24
SCRAPER CONTROL VALVE
1. Plug in line from the pump. 2. Relief valve.
Remove plug (1) from the oil line from the pump and
install the hose and gauge assembly.
Start the engine and run it at low idle rpm. Raise the
bowl as far up as it can go. Increase engine rpm, and
slowly move the bowl lift lever to the UP position for no
more than 5 seconds. The high reading on the gauge is
the pressure setting for relief valve (2). The correct
pressure setting is 2525 + 25 or -0 psi (177.5 + 1.8 or - 0
kg/cm2) (17 425 + 172 or - 0 kPa).
RELIEF VALVE
2. Relief valve. 3. Shims. 4. Valve body.
If the pressure setting of relief valve (2) was not
correct, stop the engine. Remove relief valve (2) from the
scraper control valve and install a new relief valve.
If a new relief valve is not available, remove valve
body (4) from valve (2) and either add shims (3) to
increase or remove shims to decrease the pressure
setting of the relief valve.
After a shim is either removed or added and valve
body (4) is installed on valve (2), install the relief valve in
the scraper control valve. Start the engine and make
another relief valve test.
Do not remove the test gauge if the ejector kickout
valve is to be tested.
EJECTOR KICKOUT VALVE
Install the 7S8714 Pressure Gauge and hose in the
oil line from the pump to the scraper control valve. See
RELIEF VALVE IN THE CONTROL VALVE for test
gauge installation.
Start the engine and hold the ejector control lever in
the OPEN-EJECT position until the floor is almost open.
Run the engine at high idle rpm and move the ejector
control lever to the CLOSE-RETURN position. Detent
balls keep the lever in the CLOSE-RETURN position.
The high pressure reading on the gauge at the time the
ejector control lever automatically moves to the HOLD
position is the pressure setting of the ejector kickout
valve. The correct pressure setting of the ejector kick-
out is 1900 + 100 psi (133.6 + 7.0 kg/cm2) (13 110 690
kPa).
EJECTOR KICKOUT VALVE
1. Guide (with groove). 2. Piston (will fit in groove). 3.
Plug. 4.1/8 in. hex wrench.
If it is necessary to change the pressure setting of
the ejector kickout valve, remove plug (3) from the
ejector spool spring and kickout valve housing on the
scraper control valve.
Use a 1/8 in. hex wrench (4) through the opening in
the housing, where plug (3) was removed, to push piston
(2) into the groove in guide (1).
Turn the wrench, the piston and the guide clockwise
to increase or counterclockwise to decrease the
pressure setting of the elevator kickout valve.
After an adjustment is made, test the pressure
setting of the elevator valve. When the pressure setting
is correct, install plug (3). Stop the engine and remove
the test equipment.
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