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32DFR114.A 

4 - 3 

 

TABLE 4-1:  TROUBLESHOOTING GUIDE 

Function 

Symptom 

Possible Cause 

Remedy 

Main circuit breaker 
tripped 

Reset main circuit breaker. 

Hydraulic pump circuit 
breaker tripped 

Reset circuit breaker. 

No input power to 
ramp harness 
connector J1, pin 6 
(blue lead) 

Check for input power at ramp harness 
connector pin J1-6.  Repair wiring, as required. 

No signal from 
STOW/DEPLOY 
switch to ramp 
harness connector J1, 
pin 2 (red lead) 

Check for STOW REQ signal at ramp interface 
connector pin J1-2.  Repair wiring, as required. 

STOW/DEPLOY 
switch defective 

Replace or repair STOW/DEPLOY switch. 

Main ramp power 
switch defective. 

Replace or repair main ramp power switch. 

Pump solenoid 
defective 

Replace pump solenoid. 

Pump relay defective 

Replace pump relay. 

Electronic controller 
defective 

Check for PUMP SOLENOID INPUT signal at 
controller connector pin J4-4. Replace controller, 
if necessary. 

Hydraulic pump does 
not operate; pump 
solenoid does not 
operate 

Pump wiring harness 
defective 

Check pump-wiring harness.  Repair wiring, as 
required. 

Needle valves closed  

Adjust valves as shown in section C.5 in this 
chapter. 

Needle valves clogged 

Clean needle valves.  Adjust valves as shown in 
section C.5 in this chapter. 

Hydraulic pump wiring 
harness defective 

Check for STOW VALVE INPUT signal at 
hydraulic pump assy harness connector J9 
(white lead).  Repair wiring, as required. 

Electronic controller 
defective 

Check for STOW VALVE INPUT signal at 
controller connector pin J4-2.  Replace controller 
if required. 

Directional valve 
defective 

Replace hydraulic pump assy. 

Hydraulic rotary 
actuator defective 

Replace hydraulic rotary actuator. 

STOW 
function 
inoperative 
or erratic 

Pump solenoid 
operates, but no ramp 
movement occurs 

Hydraulic pump 
defective 

Replace hydraulic pump. 

 

Содержание BR2SS Series

Страница 1: ...it breaker tripped Reset circuit breaker Hydraulic pump circuit breaker tripped Reset circuit breaker Vehicle interlock conditions not met Check that all interlock conditions are met before attempting...

Страница 2: ...y turning them fully clockwise Readjust valves as shown in section C 5 in this chapter Hydraulic fluid level low Check hydraulic fluid level refill as required Low hydraulic pressure Check that hydrau...

Страница 3: ...ve Check for PUMP SOLENOID INPUT signal at controller connector pin J4 4 Replace controller if necessary Hydraulic pump does not operate pump solenoid does not operate Pump wiring harness defective Ch...

Страница 4: ...Repair as required Replace hydraulic pump Hydraulic pump wiring harness defective Repair or replace harness from electronic controller to hydraulic pump Pump directional valve defective Replace hydrau...

Страница 5: ...adjustment Verify that proximity sensor is energized LED on sensor indicates operation and adjusted for correct gap Refer to section B 6 in this chapter Ramp will function in one direction but not th...

Страница 6: ...terface connector See Table 4 2 for pin layout and signal descriptions Table 4 2 CONNECTOR PIN LAYOUT AND DESCRIPTION Pin Wire color Description Volts amps 1 White Interlock common Ground for interloc...

Страница 7: ...connect to the ports on the backside of the pump body Cap off the upper deploy port fitting and connect a suitable pressure gauge to the lower stow port fitting d Press and hold the STOW button on the...

Страница 8: ...s NOTE If ramp does not stow fully repeat steps c and d above Readjust stow pressure by turning the stow pressure setting valve 1 8 turn CW until ramp stows k Press the DEPLOY button on the pendant to...

Страница 9: ...target segment must be directly in front of a sensor Adjust as necessary c Refer to Figure 4 6 Loosen jam nuts on sensor body Adjust position of both nuts to achieve a gap between nose of sensor and...

Страница 10: ...a Visually inspect ramp for loose or missing hardware and fittings and confirm that pockets are free of debris b Verify that bottom cover is installed on ramp c Verify that non skid flooring is clean...

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