Operator’s manual
Double-sided disc mowers
with central suspension
- 52 -
8.
MALFUNCTION AND THEIR REPAIRS
Tab. 9. Defects and their repairs
Defect
Reason
Repair
Mower stops working
(partly)– leaves stripes of
uncut grass between the
discs
1
Lack of knives
Put on knives
2
Worn knives
Replace knives
3
Improperly mounted knives
(left – right)
Put on knives strictly according to
instructions
4
Improper front inclination
Adjust inclination strictly
according to instructions
5
Too high PTO rpm
(The most frequent mistake)
Reduce PTO rpm (recommended
1600 - 1800 rpm)
6
Too low work speed
Speed up to V 10 km/hor more
7
Damaged tractor’s PTO
Repair
8
Lying grass
The inclination - the angle zero
Mower with either tine or roller conditioner may mow improperly in case of
very short grass or after rain
The grass is wound on
the forming drums
Mowing lying grass without inclination
towards the front
Always mow low and fast –
inclination towards the front – 4
cm
Grass blocks the mower –
lack of grass flow or the
flow is uneven
Too low work speed
Speed up to 10 km/h or more
Safety device is working
often without clear reason
Worn elements of safety device or
improper adjustment
This repair must be done by
SaMASZ service
Mower does not work, even
though the drive is
transmitted from the tractor
Damaged intersecting axis gear
Replace intersecting axis gear
Mower is blocked
Damaged gears in the cutterbar.
Damaged bearings in the disc hub
This repair must be done by
SaMASZ service
Mower’s hydraulics do not
work
Damaged or dirty hydraulic cylinder
and check valve
Replace or clean hydraulic
connector and check valve
Tractor’s hydraulic system is
damaged.
Check tractor’s hydraulic system
Conveyor is being blocked
by grass
Too low speed
Increase – adjust to the grass
weight
Leaking cylinder
Contaminated oil in the tractor
hydraulics
Replace oil in the tractor
hydraulics. Provide brand new
cylinder repair kit and replace
worn gaskets
Excessive vibration during
work
Damaged PTO shaft
Check the condition of PTO shaft
and if necessary replace
Oil leak in gear
Not tight assembly
Examine tightness and check oil
level.