TM 5-3805-258-24-1
H Y D R A U L I C
S Y S T E M
PRESSURE TEST OF PILOT SYSTEM
Pressure Test At The Selector And Pressure
Control Valve
WARNING
Make reference to WARNING on first page of
HYDRAULIC SYSTEM TESTING AND AD-
JUSTING section.
T o o l
N e e d e d :
6 V 4 1 6 1 H y d r a u l i c T e s t G r o up
S E L E C T O R A N D P R E S S U R E C O N T R O L V A L V E
1. Tee. 2. Cap.
1.
2.
T E S T I N G
A N D
A D J U S T I N G
Remove cap (2). Install a 5P5008 Connector,
6V3081 Hose and 5P4815 Pressure Gauge (0
to 4150 kPa or 0 to 600 psi) on tee (1).
Start and run the engine at high idle. The pres-
sure reading, with the oil at normal operating
temperature, must be 2800 ± 340 kPa (410 ± 50
psi).
P I L O T P U M P S E C T I O N R E L I E F V A L VE
3. Plug.
3. If the pressure reading is not correct, stop the
engine and remove plug (3) from the relief
valve. Remove the old cartridge valve and
install a new one.
4. Install plug (3). Remove the test equipment
and install cap (2) on tee (1).
Optional Pressure Test At The Lift And Tilt
Control Valve
This is an optional method to check the pressure in
the pilot system. The pressure can be checked at four
different places during TILT BACK, DUMP, LIFT
and LOWER operations. The disadvantages of this
optional method are: the control levers must be
moved to check the pressure and air must be removed
from the pilot system (See PROCEDURE TO RE-
MOVE AIR FROM PILOT SYSTEM).
NOTE: The pressure of the pilot system can be
checked at two additional places on the attach-
ment control valve.
Pilot Pressure For Tilt Back
1.
2.
3.
Disconnect hose assembly (1) from elbow (2).
Install 619258 Swivel Tee (6) between hose as-
sembly (1) and elbow (2).
Install 5P5008 Connector (5) on the swivel tee.
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