OPERATING INSTRUCTIONS
3-21
CAUTION
7.
When the engine starts, release the key. Gradually
push the choke lever in until the engine runs
smoothly.
IMPORTANT
Black smoke from the exhaust and a rough engine
indicate overchoking.
8.
To adjust the speed, turn the throttle control in or out,
as needed, until the engine runs smoothly at a speed
capable of withstanding use of the hydraulic controls.
The hydraulic controls should now be functional.
9.
Before shutting it off, allow the engine to cool down
by running at a slow idle for thirty seconds.
10. Once the engine is cool, turn or push the throttle
completely in and turn the ignition switch key to the
OFF position.
Air Ride Operation
1.
Trailer air pressure must be maintained above 90 PSI
before operating. PROTECTION VALVES are used to
maintain 65 PSI air brake pressure during
suspension or remote system air loss.
2.
The Models 425/440 tandem axle semitrailer is
equipped with a ride control valve located on front
axle. When moving the undercarriage from transport
to load position, the front axle is raised off ground,
causing suspension air bags to deflate achieving low
load angle.
CAUTION
3.
The Model 455 triple axle semitrailer, with 10’-1”
spread between front and rear axles is equipped with
additional height control valves to adjust the
suspension during loading and unloading operations.
When moving the undercarriage from transport to
load position, the undercarriage is tilted with the
center axle air bags inflated and rear axle
suspension air bags deflated to achieve low load
angle. This function positions the center axle for
added undercarriage support to the semitrailer and
payload when tilted for loading/unloading.
CAUTION
4.
Different tractor fifth wheel heights may affect proper
operation of the triple axle suspension air system. In
the event front and rear axle suspension air bags are
not inflated or feel soft by the time the undercarriage
has reached transport position, adjustment to the
front and rear axle control valve linkage may be
required
(See “Triple Axle Air Ride Height
Adjustment for Transport” on page 4-13.)
Do not crank engine for more than 10 seconds. If
engine does not start, consult the owner’s
manual supplied with the engine.
If suspension air loss should occur, completely
deflate suspension and temporarily operate on
the air springs internal rubber bumpers. Carefully
proceed to the nearest semitrailer service facility.
To deflate the air suspension, disconnect the
lower connection on the linkage of the automatic
air valves. Rotate the valve control arms down
about 45
o
to exhaust the air. To restore to normal
operation, simply reverse the procedure.
Insure suspension air bags are inflated on all
axles when moving undercarriage from load to
transport position. Failure to do so can cause
excessive tire wear.
Summary of Contents for 425B Series
Page 2: ......
Page 6: ...iv F 543 1011 Edition...
Page 14: ...2 6 F 543 1011 Edition STANDARD SPECIFICATIONS...
Page 26: ...3 12 F 543 1011 Edition OPERATING INSTRUCTIONS Figure 3 7 Steps for Loading and Unloading...
Page 32: ...3 18 F 543 1011 Edition OPERATING INSTRUCTIONS Figure 3 12 Dock Leveler Operation...
Page 61: ...MAINTENANCE AND LUBRICATION 4 21 Figure 4 13 Axle and Brake Assembly...
Page 76: ...4 36 F 543 1011 Edition MAINTENANCE AND LUBRICATION Page Intentionally Blank...
Page 86: ...5 10 F 543 1011 Edition TROUBLESHOOTING GUIDE...
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