S-SERIES PRIVATE USE SERVICE MANUAL
INSTALLATION
SEPTEMBER 2020
2 - 13
32DSW02.F _______________________________________________
6”x6”x12”) on the platform and in front of the yellow wheelchair location plates. Ensure the test load is
touching the plates. Press and hold STOW switch.
b. The pressure switch is correctly set if pump motor shuts off, preventing inward movement of platform.
There should not be excessive on/off clicking of pump motor that would indicate switch is marginally set.
Proceed to next step if pump motor does not shut off.
c. Refer to
Figure 2-16
. Remove the 1/4-20 x 1.00" setscrew (with hex recess) from end of pressure switch
to gain access to adjustment screw. Save setscrew for reinstallation.
d. Insert a 1/8" hex wrench into pressure switch and engage adjustment screw inside. Turn screw 1/8 turn
clockwise, and then repeat 50 lb. load check described above. Repeat adjustment, as necessary, to
achieve correct setting.
e. Reinstall setscrew and tighten against adjustment screw.
NOTE:
This procedure is for a hydraulic pump with a hydraulic pressure switch that is adjusted by turning the
pressure switch enclosure, by hand.
f. Refer to
Figure 2-17
. Loosen the locking set screw from the hydraulic pressure switch, using a 5/64” hex
wrench to allow adjustment of the hydraulic pressure switch.
PRESSURE SWITCH
SET SCREW AND
ADJUSTMENT SCREW
FIGURE 2-16: HYDRAULIC PUMP WITH PRESSURE SWITCH
P R E S S U R E S W I T
( P / N 3 9 3 9 9 )
T U R N C C W
TO L O O S E
A N
A D J U S
T P R E S S U R E
T U R N C W
TO T I G H T E N
A N D
A D J U S
T P R E S S U R E
FIGURE 2-17: HYDRAULIC PUMP WITH DECELERATION
