Operation and maintenance manual

Section 250-0070
SM 2165 Rev 1 11-03
9
Braking System - Treadle Valve
Fig. 7 - Typical Test Fixture
SM - 2771
SM - 1238
Fig. 8 - Actuator Piston Actuation
to the treadle valve assembly as noted at 'Removal'.
4. Connect electrical connections to the stop light
pressure switch as noted at 'Removal'.
5. Connect electrical connections to the kick-down
switch and accelerator pedal assembly as noted at
'Removal'.
6. Fill hydraulic tank with oil specified in Section
300-0020, LUBRICATION SYSTEM.
7. Place the battery master switch in the 'On' position,
start the engine and bring hydraulic oil to operating
temperature.
8. Apply the brakes and check for oil leaks. Tighten
line connections and fittings as necessary.
Note: When performing Step 9, make sure that parking
brake applies and releases appropriately.
9. Check brake operations by actuating pedal and park
FULLY ACTUATED
NORMAL POSITION
SCREWDRIVER
OR PRY BAR
T1
P1
B1
PX
T2
P2
B2
G3
G1
G2
M
P
D1
P1
P2
PX
PILOT
RETUR
N
RETURN
SUPPLY
SUPPLY
SIMULATED
BRAKE
VOLUME
FRONT BRAKE
PRESSURE
REAR BRAKE
PRESSURE
170 ± 3.5 bar
(2 465 ± 50lbf/in²)