Nilfisk-Advance Captor 4800 - Setting Relief Valves

FORM NO. 56043093 / Captor
™
4300, 4800, 5400 - 71
HYDRAULIC SYSTEM
SETTING MAIN RELIEF VALVE PUMP CIRCUIT 3
Cap and plug the right side scrub brush drive motor inlet hose # 41 (inside hose).
Raise hopper and open engine hopper door panel to access pump relief valve block assembly.
Connect adapter cord PN 56407502 to L7 Main scrub brush motor solenoid coil (wire colors ORG & ORG/BLU).
Insert hydraulic test gauge (3000psi) to the XT 3 test port.
To adjust the hydraulic oil must be warm and engine in high speed (2400rpm).
Energize L7 scrub brush solenoid using the adapter cord. The pump circuit 3 will be in overload use caution not to leave in this
position for a long period, may cause damage.
Observe the pressure gauge and adjust accordingly. Relief should be at 2400psi. CCW to decrease pressure CW to increase.
SETTING RELIEF VALVE SCRUB UP AND SQUEEGEE SYSTEM CYLINDERS.
Locate the valve body assembly under the recovery tank. Connect the adapter cord to the L1 demand valve wire colors ORG and
BLU/WHT.
Insert hydraulic test gauge (1000psi) to the XT 3 test port.
To adjust the hydraulic oil must be warm and engine in high speed (2400rpm).
Energize L1 demand valve solenoid using the adapter cord. The pump circuit 3 will be in overload use caution not to leave in this
position for a long period, may cause damage.
Observe the pressure gauge and adjust accordingly. Relief should be at 800psi. CCW to decrease pressure CW to increase.
SETTING THE ADJUSTABLE PRESSURE FLOW VALVE SCRUB PRESSURES 2 AND 3.
Insert hydraulic test gauge (1000psi) to the test port on the scrub deck cylinder.
Locate the valve body assembly under the recovery tank. Locate the adjustable pressure ow valve see Figure 5.
Observe the pressure gauge and adjust accordingly. Circuit ow pressure should be 160psi. CCW to decrease pressure CW to
increase.
FRONT
Relief Valve 800 PSI
squeegee lift
L15
L3
L4
L1
L2
L5
Port Check C artridge
Pressur e Reducer Cartridge
160 PSI
Scrub Down Valve
Scrub Down Valve
Scrub Down Valve
Squeegee Valve
Demand Valve
Demand Valve
R ight Side
S crub Brush
Motor
Inside Hose Location
FRON T
Squeegee/Brush Cyli nder Valve Block
FIGURE 5