 |
|||
|
|
|||
|
|
|||
| ||||||||||
|
|
 Conversely, a lead-acid battery installed in the truck
c.
Adjust plugging severity as follows:
calibrated and run from a nickel-iron alkaline battery will
(1) Operate the truck at a maximum forward
pass excessive current. The current limit must be set
speed. If previous adjustments (para 6-244 through 6-
for a maximum of 200 amperes for either battery.
248) have been properly made, truck will come to
Excess current will cause a lurch in speed as the
maximum speed smoothly.
acceleration passes from the SCR controlled
acceleration to the field weakening controlled maximum
(2) Move direction control lever (82, figure 7-
speed.
2) to reverse position without releasing accelerator or
CAUTION
applying service brakes. Determine severity of direction
change.
Replace the battery with a similar battery or
recalibrate current limit (para 6-245) to prevent
(3) If plugging reaction is too severe, adjust
truck lurch. Excess current may also damage
SCR control pack No. 5RH trimmer (figure 62)
the SCR control pack.
counterclockwise to reduce severity. If plugging is too
soft, adjust clockwise. Repeat step (2) above until
6-253. BATTERY DESCRIPTION. Batteries differ in
correctly adjusted.
appearance as follows:
a. Lead-Acid Battery. The lead-acid battery is
(4) Replace SCR control pack cover and
constructed with all cells built into one case. The battery
control panel cover.
case top is filled and sealed between the cells.
6-250.
INDIVIDUAL ADJUSTMENTS.
When
b. Nickel-Iron Alkaline Battery. This battery is
necessary, any one or more of above adjustments can
composed of individual separate cells arranged in a
be made without completing the complete sequence.
carrying tray or case. Each cell is joined by a connector
The following chart is a summary of adjustment steps
cable with cells hooked in series. Cells are separated
and preparation required (para 6-243).
from each other within the case.
6-251. BATTERY TYPES.
6-254. BATTERY COMPARTMENT. Each truck is
constructed with battery clamps welded to the truck in a
6-252. GENERAL. This truck may be operated from
location permitting installation of only one type battery.
either a lead-acid or nickel-iron alkaline battery. Either
If the battery is to be changed to the other style, the
battery will provide the required voltage but due to its
brackets must be relocated.
construction and materials, the current limit must be
calibrated for the type battery installed. The current
6-255. DEFECTIVE MATERIAL. Return unserviceable
output of the nickel-iron alkaline battery will not provide
items to supporting maintenance units for determination
sufficient current to satisfactorily operate the truck that
of feasibility of action under warranty.
has been calibrated and run on a lead-acid battery.
Para
Adjustment
Preparation
Ref
1.
Field Weakening
a.
Lift drive axle
b.
Connect ammeter and shunt
c.
Jump brake switch
2.
Current Limit
a.
Lift drive axle
b.
Connect ammeter and shunt
c.
Jump brake switch
d.
Disconnect ARP no. 5 lead
3.
Creep Speed
a.
Disconnect ARP no. 5 lead
b.
Operate truck
4.
Acceleration Time
a.
Disconnect ARP no. 5 lead
b.
Operate truck
5.
Shorting Contactor Time Delay
a.
Operate truck
6.
Plugging
a.
Operate truck
6-52
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals