Defects And Their Repair - SaMASZ XT 390 Operator's Manual

OPERATOR'S MANUAL

9. DEFECTS AND THEIR REPAIR

Tab. 10. Possible defects and their repairs
Defect type
Mower fails to mow or
leaves strip of uncut
grass between discs
Grass winds on drums
The mower jams up with
grass - windfall is
blocked or uneven
Hydraulic safety
activates too often with
no apparent cause
The mower does not cut
even though tractor
power is transferred to
the mower
The mower siezes up
The mower will not
fold up
Leaking cylinder
Excesive vibration during
work
Oil leak in gear
REAR DISC MOWER
Reason
Some of knives are missing
Worn knives
Improperly mounted knives
(left – right)
Improper forward tilt
Too high tractor's engine rpm
(the most frequent mistake)
Too low operating speed
Damaged tractor's PTO shaft, drive not
transmitted
Laid grass
It is tolerable for a mower with conditioner or rollers to mow improperly in case of very
Mowing lying grasses without tilting the
mower forward.
Mowing speed too low
Swath guides are set too narrow
Improperly adjusted or damaged
hydraulic valve
Broken shaft in the gearbox
Relay shafts - incorrect rotation
direction of the unidirectional clutch
Damaged gear in the cutterbar or
gearbox
Damaged or dirty hydraulic connections
Damaged tractor hydraulic system
Dirty oil in hydraulic unit of the tractor
Damaged PTO shaft
Not tight assembly
XT
Replace knives with new ones
Mount knives strictly keeping provisions
Set tilt according to operating manual
Increase driving speed above
low grass or during a rainfall
Always mow low and fast – tilt forward to 4
Increase mowing speed to 10 km/hr or more
Widen swath guides to the
Adjust or have the valve repaired by an
authorized service provider
Check rotation direction
Repair through an authorized service
Replace or clean hydraulic connections
Check the functioning of the tractor
Replace oil in hydraulic unit of the tractor.
Purchase repair kit of the cylinder and
replace damaged sealings
Check the condition of PTO shaft and if need
Examine tightness and check oil level
Recommendations
Mount knives
found in manual
Reduce rpm
V ≥ 10 km/h
Remove defect
Inclination - zero angle
cm
maximum
Replace gear shaft
provider
hydraulic system
be replace
39