Power Train
Testing And Adjusting
2.
Current limit (C/L) circuit has a defect:
Make test to the MicroController control panel as
stated in the respective service module. Repair or
replace components as necessary.
3.
Unpolished or improperly positioned forks:
Install tapered and polished forks. Position forks
correctly for load being lifted.
4.
Lift truck equipped with tires that have poor
traction:
Install tires that have good traction per
recommendation from DAEWOO Inc.
5.
Lift truck work load is too heavy or the duty cycle
too long:
Decrease the work load and/or duty cycle.
Problem 10: Lift truck has slow acceleration:
Probable Cause:
1.
Drive control overheated and the thermal switch
opens:
NOTE:
The lift truck will still go into the bypass
mode, but current limit will be cut back in the
transistor mode if the thermal switch opens.
Allow the MicroController control panel to become
cool so the thermal switch will close.
NOTE:
The thermal switch will open circuit if the
temperature is 150
L
6¡C (302
L
11¡F) and reclose
(short circuit) at 130
L
7¡C (266
L
13¡F).
Power Transfer Group and Final Drive
Problem 1: Constant noise in drive axle housing.
Probable Cause:
1.
Lubricant not to the specified level.
2.
Wrong type of lubricant.
3.
Wheel bearings out of adjustment or have a defect.
4.
Bevel gear and pinion not in adjustment for correct
tooth contact.
5.
Teeth of bevel gear and pinion have damage or
wear.
6.
Too much or too little pinion to bevel gear
clearance (backlash).
7.
Loose or worn drive motor bearings.
8.
Loose or worn side bearings.
9.
Noise in the drive wheel reduction components.
Problem 2: Noise at different intervals.
Probable Cause:
1.
Bevel gear does not run evenly.
a.
Nut on drive gear not tightened correctly.
b.
Drive gears have a defect (warped).
2.
Loose or broken bearings.
3.
Failure of or not enough lubricant on the drive
wheel reduction components.
Problem 3: One drive wheel does not turn (motor
operates).
Probable Cause:
1.
Broken axle shaft.
a.
Loose wheel bearings.
b.
Loose flange studs or nuts.
c.
Bent housing.
2.
Pinion gear teeth have damage.
3.
Bevel gear, pinion or gears broken.
Problem 4: Leakage of lubricant.
Probable Cause:
1.
Loss through axle shafts.
a.
Lubricant above specified level.
b.
Wrong kind of lubricant.
c.
Restriction of axle housing breather.
d.
Axle shaft oil seal installed wrong or has
damage.
2.
Loss at pinion.
a.
Lubricant above specified level.
b.
Wrong kind of lubricant.
c.
Restriction of axle housing breather.
d.
Drive motor seal worn or not installed correctly.
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