S-SERIES PRIVATE USE SERVICE MANUAL
MAINTENANCE
SEPTEMBER 2020
3- 5
32DSW02.F
Refer to
Figure 3-2
. Two motor contactors (solenoids) for the hydraulic pump are located at the top of the pump
assembly. A LED status indicator is located between the 30 amp and 8 amp circuit breakers. The LED is green
when both contactors are operating correctly and the motor is operating. When the pump is not operating and the
top contactor has failed the LED will be red. When the side contactor has failed the LED will be green.
3.
LIMIT SWITCH STATES
Refer to
Figure 3-3
. The actuation diagram shows the state of all limit switches as the platform travels from
stowed, to vehicle floor level, and then to ground level. The solid line segments (
▬
) represent current flow
through the normally CLOSED switch contacts, and the open line segments (
═
) represent current flow through the
normally OPEN switch contacts. The heavy dashed lines (
∎∎∎
) show switch states when platform is beyond
normal travel boundaries. This is useful in showing the operation of switches that change states at stowed or
ground level positions. For proper operation of lift, the switch actuations must overlap as shown.
TOP PUMP SOLENOID
LED STATUS INDICATOR
SIDE PUMP SOLENOID
FIGURE 3-2: STATUS INDICATOR FOR PUMP SOLENOIDS
FIGURE 3-3: LIMIT SWITCH ACTUATION CHART
