Allied Systems W8L Service Manual page 80

Electronic Controls
Figure 3-20 Troubleshooting Analysis Check Chart for Service Personnel (continued)
PROBLEM
Overheating.
Winch will not operate
while tracks are turning.
Winch will not operate in
any function.
3 - 32
POSSIBLE CAUSE
Plugged pressure fi lter.
Plugged suction fi lter.
One or both clutches dragging.
Low system pressure.
High cooling oil pressure.
Clutch/brake shaft bearings set too
tight.
Low oil level.
Accumulator system malfunction.
Low oil pressure.
Defective PTO shaft.
Electric problem.
Control lever off-center at startup.
Control module not powered.
Control lever 24 VDC - 5 VDC
converter malfunction.
Activation switch off.
Control module fault.
Coil and/or circuit open or shorted.
Cartridge valve plugged.
Loose or worn connector.
Relief pressure not being reached.
CORRECTION
Replace fi lter.
Check suction fi lter and clean or replace.
Check by placing control lever in BRAKE-OFF.
Normally drum will rotate slowly in either direction.
If the reverse clutch is dragging, the drum will rotate
in the LINE-OUT direction. If forward clutch is drag-
ging the drum will rotate in the LINE-IN direction and
it will take more than 100 lbs of line pull to prevent
drum rotation.
Adjust accordingly.
Check cooling oil pressure. Replace relief valve if
required.
Adjust accordingly.
Add oil.
Check for:
1. Correct leakdown time as described in Fig. 3-18.
2. Leaking accumulator valve.
3. Leak in accumulator lines.
4. Damaged or defective accumulators.
Refer to "Low Oil Pressure" troubleshooting item
above.
Inspect PTO shaft and coupling, clutch shaft bevel
ring gear and PTO shaft pinion gear for wear or
damage.
Troubleshoot the problem accordingly
Return control lever to neutral position and attempt
function again.
Check fuse & replace if necessary.
Replace converter if the red & green LEDs are not lit.
Check status indicator on module. Red LED should
not be illuminated. If it is, consult dealer.
1. Check module output LEDs. Flashing LED indi-
cates open or shorted circuit. (1/2 second ON;
1 second OFF.)
2. Check wiring harness continuity.
3. Replace faulty coil.
NOTE: A working coil will have 15 to 50Ω
resistance and will be magnetized when
energized.
Check valve for obstruction. Clean or replace as
necessary.
Check and replace as needed. Check harness
continuity.
Check bypass coil & valve—replace faulty parts.
(Continued on next page)