Disabled Passenger Lift DPT-512 | 20
SECTION 1 | GENERAL INFORMATION & OPERATING PROCEDURES
COMPONENT
DESCRIPTION
Directional Control
Valve
(inside hydraulic box)
Separate hydraulic valves control the lift
and the stabilizers. Both valves are two
spool, solenoid actuated valves. They direct
hydraulic fluid to the lift cylinders and
the stabilizers when engaged by electrical
switches in the cab or van control stations.
Each valve is equipped with a manual override
lever. By engaging these levers, the lift can
be lowered and the stabilizers lifted when
electric power is disabled.
Hydraulic Pressure
Relief Valve
This adjustable pressure relief valve is preset
to 1900 psi (131 bar) to prevent damage to
hydraulic system components. It is part of the
directional control valve.
Stabilizer Hydraulic
Cylinders
Each of the four stabilizers is double acting,
single stage type. They extend, retract, and
hold the stabilizer legs in place.
Hydraulic Pressure
Switch
A hydraulic pressure switch is mounted on the
right side. This switch prevents the lift from
being raised unless the stabilizers are down
and pressurized. The switch tripping pressure
is set at 1000 psi (69 bar).
Stabilizer Cylinder Lock
Valves
Double acting lock valves are installed on
each of the four stabilizer cylinders. They
prevent the stabilizers from extending or
retracting under load. These valves are
unlocked by the actuating pressure from the
directional control valve.
Platform Lift Hydraulic
Cylinders
These single-acting, 3-stage, telescoping
cylinders have strokes of 60.125 in (1524 mm).
Lock Valve Release
Lever and Cables
A lever located on the left side of the truck
chassis controls two cables that activate the
manual override feature on the lift cylinder
lock valves.
Summary of Contents for 25781
Page 12: ...Disabled Passenger Lift DPT 512 12 FIGURE 1 1 1 DISABLED PASSENGER TRANSPORTER MODEL DPT 512...
Page 13: ...Disabled Passenger Lift DPT 512 13 FIGURE 1 1 1 DISABLED PASSENGER TRANSPORTER MODEL DPT 512...
Page 22: ...Disabled Passenger Lift DPT 512 22 FIGURE 1 1 10 HYDRAULIC COMPONENT GROUP...
Page 33: ...Disabled Passenger Lift DPT 512 33 FIGURE 1 2 1 1 CAB CONTROLS AND INDICATORS...
Page 36: ...Disabled Passenger Lift DPT 512 36 FIGURE 1 2 1 3 VAN BODY CONTROL STATION...
Page 38: ...Disabled Passenger Lift DPT 512 38 FIGURE 1 2 1 7 EMERGENCY OPERATING CONTROLS...
Page 57: ...Disabled Passenger Lift DPT 512 57 FIGURE 2 1 9 3 LUBRICATION POINTS...
Page 74: ...Disabled Passenger Lift DPT 512 74 FIGURE 2 3 1 HYDRAULIC COMPONENT GROUP...
Page 95: ...Disabled Passenger Lift DPT 512 95 FIGURE 4 2 5 PLATFORM ASSEMBLY 6 7 8 4X 2 3 8X 1 5 4 9...
Page 107: ...Disabled Passenger Lift DPT 512 107 FIGURE 4 2 11 CAB CONTROLS AND INDICATORS...
Page 109: ...Disabled Passenger Lift DPT 512 109 FIGURE 4 2 12 VAN BODY CONTROL STATION...
Page 111: ...Disabled Passenger Lift DPT 512 111 FIGURE 4 2 13 REAR VAN CONTROL STATION...
