New Holland Workmaster 25 Tier 4B, Руководство оператора

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8 - TROUBLESHOOTING
Hydrostatic transmission - Troubleshooting
Problem Possible Cause Correction
When operating HST
pedal, tractor does not
move. HST high pressure relief valve pressure
setting low Check HST pressure and repair as needed
HST charge pressure valve faulty Check HST charge pressure and repair as
needed
HST Filter clogged Replace HST filter
HST pump faulty Repair or replace HST pump
HST control linkage worn or damaged
Repair or replace linkage as needed
Tractor is still moving
when HST pedal is in
neutral position Incorrect neutral adjustment of HST linkage Adjust neutral position of HST linkage
HST pedal linkage damaged Replace damaged linkage parts as needed
HST control arm clamp bolt loose Tighten control arm clamp bolt
HST power is low Oil shortage
Add transmission oil as needed
Air in HST circuit Check and repair the hydraulic suction line
Transmission oil temperature is too high Shut down tractor to cool the transmission
oil, and restart after oil temperature has
been reduced
HST internal parts worn Repair HST transmission as needed
HST filter clogged Replace the HST filter
Abnormal noise Engine speed is too low Set engine speed over 1500 RPM
Oil temperature is too low
Run engine to warm up the oil
HST oil filter clogged Replace the HST filter
Oil shortage Add transmission oil as needed
Electrical system - Troubleshooting
Problem Possible Cause Correction
Headlights are dim Battery charge is low Charge or replace battery
Faulty headlight wiring or faulty ground
connection Check and repair wiring as needed
Battery does not charge Incorrect wiring Check battery terminals and ground for cor-
rosion
Faulty Alternator Test alternator repair or replace as needed
Incorrect fan belt tension or broken belt Adjust fan belt tension or replace belt
Faulty battery Replace battery
Headlights will not
illuminate Light bulb burnt out Replace bulb as needed
Blown Fuse Check the cause and replace fuse with cor-
rect size
Faulty wiring connection Check headlight wiring connection, repair
as needed
Faulty light switch Check switch for proper function and re-
place if needed
Horn does not sound Horn switch failure Replace horn switch
Faulty wiring connection Check horn wiring connection, repair as
needed
Blown fuse Check for cause, replace fuse with correct
size
Faulty horn
Check horn , replace if needed
Turn signal lights do not
work Light bulb burnt out Replace bulb, with correct size
Faulty wiring connection Check wiring connections, repair as
needed
Blown fuse Check the cause, replace fuse with correct
size
Faulty turn signal switch Check switch for proper function, replace
switch if needed
8-4