Tennant sentinel, Service Manual

Page: 143 / 276

143 Sentinel 9018524 (05-2019)
TROUBLESHOOTING
Hopper System (Continued)
Function Energized
Coils
Notes Valve
Block
Test
Port Feed
Port
Pres-
sure
Port
Return
Port
Relief
Valve In
Circuit
Relief
Valve
Pressure
Setting
Interlock/Indicator Notes
Hopper
Tilt Back
(Dump) SV18 /
SV32
Must hold
Hopper Tilt
Back button to
operate Hopper/
Vaccum
Fan
Valve
Block
P7 C10 C9 /
T9
Block
Return
RV4 2750 psi Parking or service
brake must be
applied for this
system to operate.
Machine level
sensor must
indicated machine
is on level surface CV5 check valve in circuit. OR
3@0.063 located in hopper
control block, before hopper
tilt cylinders RV4@2750
psi, OR5@ 0.063 in hopper
control block. Check valves in
cylinders on piston ends.
Function Energized
Coils
Notes Valve
Block
Test
Port Feed
Port
Pres-
sure
Port
Return
Port
Relief
Valve In
Circuit
Relief
Valve
Pressure
Setting
Interlock/Indicator Notes
Hopper
Tilt
Forward
(Normal
Sweep) SV19 /
SV32
Must hold
Hopper Tilt
Forward button
to operate Hopper/
Vaccum
Fan
Valve
Block
P7 C9 C10
/ T9
Block
Return
RV7 1250 psi Parking or service
brake must be
applied for this
system to operate.
Machine level
sensor must
indicated machine
is on level surface CV5 pilot check valve in
circuit is unseated by fl uid
pressure via SV19. OR
3@0.063 located in hopper
control block, before hopper
tilt cylinders. OR5@ 0.063
in hopper control block. Pilot
check valves on cylinder
piston end is unseated by
pressure via SV19 to allow
cylinders to tilt forward (rest
position).
Function Energized
Coils
Notes Valve
Block
Test
Port Feed
Port
Pres-
sure
Port
Return
Port
Relief
Valve In
Circuit
Relief
Valve
Pressure
Setting
Interlock/Indicator Notes
High
Dump
(Option)
Lift SV2 /
SV32 Must hold
Hopper Lift
button to
operate Hopper/
Vaccum
Fan
Valve
Block
P7 C2 C1 /
T9
Block
Return
RV4 2750 psi Parking or service
brake must be
applied for this
system to operate.
Machine level
sensor must
indicated machine
is on level surface Cylinders have “velocity
valves” in line connection on
piston end of cylinder. Velocity
valves prevent hopper from
suddenly falling if hose breaks.
OR5@0.063 in hopper control
block, OR4@0.120 in hopper
block
Function Energized
Coils
Notes Valve
Block
Test
Port Feed
Port
Pres-
sure
Port
Return
Port
Relief
Valve In
Circuit
Relief
Valve
Pressure
Setting
Interlock/Indicator Notes
High
Dump
(Option)
Lower SV1 Must hold
Hopper
Lower button
to operate Hopper/
Vaccum
Fan
Valve
Block
P7 C2 C11
/ T9
Block
Return
- - Parking or service
brake must be
applied for this
system to operate. Gravity lowers the hopper.
Hydraulic fl uid moves to
return side of system via SV1.
Cylinders have velocity valves in
line connection on piston end of
cylinder. Velocity valves prevent
hopper from suddenly falling
if hose breaks. OR5@0.063
in hopper control block,
OR4@0.120 in hopper block
Conveyor System
Function Energized
Coils
Notes Valve
Block
Test
Port Feed
Port
Pres-
sure
Port
Return
Port
Relief
Valve In
Circuit
Relief
Valve
Pressure
Setting
Interlock/Indicator Notes
Lift &
Tension
Chains SV4 Main
Brush &
Conveyor
Valve
Block
G2 /
G3
P5 C4 /
C6 /
C22 C3 RV3 2750 psi
G2 / G3
250 psi
In Relief SV4 remains open for
four (4) seconds to allow
maximum pressure and fl uid
fl ow to conveyor lift cylinder.
Restrictor 0.040 at C4
Function Energized
Coils
Notes Valve
Block
Test
Port Feed
Port
Pres-
sure
Port
Return
Port
Relief
Valve In
Circuit
Relief
Valve
Pressure
Setting
Interlock/Indicator Notes
Lower &
Tension
Chains SV4/
SV31
Main
Brush &
Conveyor
Valve
Block
G2 /
G3
P5 C3 /
C22
/ T10
Block
Return
C4 RV3 2750 psi
G2 / G3
250 psi
In Relief Restrictor 0.040 at C4