Owner`s manual

23
Electric Hydraulic Power Unit Diagnosis
Chart
MODEL CONDITION POSSIBLE CAUSE CORRECTION
All Plow does not lift or lifts 1. Low hydraulic fluid level. 1. Add fluid to proper level
Power slowly - motor operates. 2. Discharged battery. 2. Recharge battery.
Angling 3. Leaking or open “A” cartridge. 3. Clean or replace “A” cartridge.
Models 4. No current to “B” coil. (red and white wire) 4. Locate malfunction and repair.
5. Inoperative “B” coil. (red and white wire) 5. Replace “B” coil. (red and white wire)
6. Malfunctioning motor. 6. Repair or replace motor.
7. Malfunctioning pump. 7. Replace pump.
All Plow does not angle right - 1. Improper coupler arrangement. 1. Engage coupler properly.
Power motor operates. 2. Mechanical bind or interference. 2. Eliminate mechanical bind or interference.
Angling 3. Malfunctioning coupler. (if equipped) 3. Repair or replace coupler.
Models 4. No current to “C” coil. (green and white wire) 4. Locate malfunction and repair.
5. Inoperative “C” coil. (green and white wire) 5. Replace “C” coil. (green and white wire)
6. Inoperative “C” cartridge. 6. Clean or replace “C” cartridge.
7. Leaking or open crossover relief valve. 7. Clean or replace crossover relief valve.
All Plow does not angle left - 1. Improper coupler engagement. 1. Engage coupler properly.
Power motor operates. 2. Mechanical bind or interference. 2. Eliminate mechanical bind or interference.
Angling 3. Malfunctioning coupler. (if equipped) 3. Repair or replace coupler.
Models 4. Leaking or open crossover relief valve. 4. Clean or replace crossover relief valve.
All
Plow will not angle - 1. Improper coupler engagement. 1. Engage coupler properly.
Power
motor operates. 2. Mechanical bind or interference. 2. Eliminate mechanical bind or interference.
Angling
3. Leaking or open crossover relief valve. 3. Clean or replace crossover relief valve.
Models
All
Plow will not hold in 1. Air in cylinders and hoses. 1. Bleed cylinders and hoses. Tighten P.A.
Power
angled position. 2. Leaking or open dual pilot check valve. cylinder gland nut.
Angling
3. Leaking crossover relief valve. 2. Clean or replace pilot check valve.
Models
4. Crossover relief valve opening at 3. Clean or replace crossover relief valve.
too low a pressure. 4. Replace crossover relief valve.