5. Turn hydraulic shutoff valve (located between tank and Y-strainer) to
"OFF" position before disconnecting hydraulic lines.
6. Disconnect battery.
7. Disconnect all electric wires and hydraulic lines from truck section to the
stair. Cap all open hydraulic lines and ports.
8. Take sufficient strain on forward hoist and disconnect A-frame from main
stair section by removing two attaching bolts.
9. Remove the two attach bolts from lower end of main stair frame.
10.
Be sure all lines and cables are disconnected and clear. Hoist stair
assembly from support frame and drive truck away.
3.1.3 Stair Installation
1. Set adjustable section to lowest position on the main section.
2. Replace bolt in each lower handrail attach angle with lift pins. (3/4-inch
hex head bolts and nuts can be substituted if Wollard lift pins are not
available.) Attach hoist cables to lift pins.
3. Support upper end of stair by placing a 1-1/4-inch pipe of sufficient length
across underside of top platform so that it protrudes out each side. Place
hoist cable sling around each pipe end making sure that it cannot slip off
or damage platform.
4. Hoist stair assembly to sufficient height.
5. Back truck section under stair assembly.
6. Align attach lugs of main section with attach lugs at lower end of main
stair frame.
7. With upper end of stair assembly at sufficient height, align A-frame lugs
with upper lugs on main stair. Install bolts.
8. Slowly release strain from hoist at upper end of stair and remove pipe
support and slings.
9. Connect all electric wires and hydraulic lines from truck section to stair
assembly.
10.
Release strain from hoist at lower end of stair and remove sling and lift
pins.
11.
Replace original bolts through lower handrail attach angles.
12.
Start engine.
13.
Hold stair "SAFETY RELEASE" switch on and slowly operate "STAIR
UP/DOWN" control handle to extend and retract cylinder to allow air to
exit system. Lower stair and release "SAFETY RELEASE" switch.
14.
Stop engine.
15.
Check for hydraulic oil leaks.
SEPTEMBER 30, 2008
CHAPTER 2 MAINTENANCE
PAGE 2
3 REMOVAL AND INSTALLATION
Truck Mounted Passenger Stair TMPS-200
Manual No. 307559
