prime mover smx45 Master Service Manual page 264

F-code Section
PT S6.0
Hydraulic System
Version no T-code
001 SMX
Possible Cause
Low hydraulic pressure
Relief valve contaminated or
bad. (Unable to get the
correct hydraulic pressure)
Bad lift pump
brushes
Contamination found in pump
Bad pump
Possible Cause
Bad lower solenoid valve
If forks do not lower, check for
mechanical binding in lift
cylinder or fork mechanism
If forks lower, remove and
inspect hydraulic
valve
Check for bad ETAC (A2)
Possible Cause
Load too large for lift truck
capacity
Battery problems
Incorrect lift pressure
adjustment
262
Return
C-code
6000
Check hydraulic pressure setting and adjust if necessary (see
page 259.)
When main ON/OFF switch OFF, and battery connector disconnected,
remove pressure relief valve and check for damage or contamination.
Replace valve or flush system and replace the hydraulic fluid (see
page 257.)
motor or Check lift motor brushes (see
pump.
Flush system and replace hydraulic fluid (see
If motor is okay, remove motor from the pump and rotate pump shaft by
hand. Replace pump if necessary.
3. No lower, lift and travel okay.
With main ON/OFF switch in the ON position, cycle the lower switch.
Does the lower solenoid valve energize (click)? If yes, disconnect the
battery connector, then slowly loosen, but DO NOT REMOVE the
hydraulic line at the hydraulic pump assembly. Have drain pan and rags
ready and allow the forks to slowly lower.
Replace lift cylinder or repair lift mechanism.
Inspect for free movement and signs of contamination. Clean solenoid
lowering valve or flush system, clean filter and replace hydraulic fluid. If not
contamination is found, repair or replace hydraulic lowering valve or
pump assembly.
With main ON/OFF switch in the ON position, the pin key code entered
in the keypad, the green ON button
lower button depressed, check
signal is detected, check mechanical problems in the steering control
handle head. Replace ETAC (A2) as a last alternative in resolving
problem.
4. Unable to pick up load.
Check load weight. Check lift pressure setting.
Replace battery with fully-charged battery.
Check and adjust lift pressure setting.
Remedy
page 91.) If brushes are okay, replace lift
Remedy
"Service Display" on page
Remedy
Master Service Manual
page 257.)
"I"
pressed on the keypad, and the
169. If no
2006-08-08