Hydraulic System; Hydraulic Fifth Wheel Lifting System; Hydraulic Boom Operation; Fifth Wheel Unlatch Control Valve - Kalmar THE OTTAWA T2 Manual Del Operador

B
Figure 22
A — Fifth Wheel Plate
B — Boom
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3.2.5 Hydraulic System

Hydraulic Fifth Wheel Lifting System

The standard fifth wheel lifting system on Kalmar tractors is
hydraulically operated. A P.T.O. and hydraulic pump mounted
on the transmission provide the hydraulic power to operate the
Hydraulic Fifth Wheel Lifting System. The fifth wheel is
mounted to a hydraulically operated "Boom" (Figure 22). This
"Boom" assembly is attached to the frame at a pivot behind the
cab. The system operates like a large hydraulic floor jack.
The following are general operating instructions and may not
apply to your particular vehicle. If there are any questions
regarding the operation of your vehicle or a particular option,
contact your Kalmar dealer.

Hydraulic Boom Operation

The hydraulically operated boom is controlled by a lever inside
the cab. The lever is located on the console to the right of the
seat and next to the shift lever (page 24).
Never raise or lower the boom while the tractor and trailer
combination is moving. Raising the boom while the
tractor and trailer are moving creates a "rollover" hazard
and may cause the vehicle to rollover possibly resulting in
A
serious injury or death. DO NOT OPERATE THE BOOM
CONTROL LEVER WHILE THE VEHICLE IS MOVING A
TRAILER.
To Raise the Fifth Wheel: To raise the boom, the engine must
be running. Pushing the lever to the UP position indicated on
the boom operating lever, raises the fifth wheel. To increase
the rate of travel of the boom, the engine may be idled higher
while the vehicle is in NEUTRAL ONLY.
To Lower the Fifth Wheel: To lower the boom, the engine
must be running and the transmission in NEUTRAL. Pulling
the boom control lever to the DOWN position marked on the
boom operating lever, lowers the boom and fifth wheel. To
increase the rate of travel of the boom, the engine may be
idled higher while the vehicle is in NEUTRAL ONLY. Standard
configuration of the boom allows both power up and down
capability.

Fifth Wheel Unlatch Control Valve

The Kalmar tractor comes standard with an air-operated fifth
wheel unlatch cylinder. The cylinder is operated by a "push-
type" valve located on the right-hand console behind the shifter
(page 24). Pressing the fifth wheel unlatch valve opens the
kingpin jaws in the fifth wheel. After the jaws are opened, they
remain open until the fifth wheel is connected to a trailer
kingpin.
3 Description and Operation