Hydrostatic Transmission - Troubleshooting; Electrical System - Troubleshooting - New Holland Boomer 47 Operator's Manual

Hydrostatic transmission - Troubleshooting

Problem
When operating HST
pedal, tractor does not
move.
Tractor is still moving
when HST pedal is in
neutral position
HST power is low
Abnormal noise

Electrical system - Troubleshooting

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