SaMASZ Z2-780, Operator'S Manual, Page: 35 / 44

Operator’s manual
Twin-rotor rotary rake
Z2-780; Z2-840
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10. MALFUNCTIONS AND THEIR REPAIRS
Defect Reason Repair
The rake does not
lift/lower hydraulically
Damaged or dirty components of
hydraulics
Replace or clean connecting
components of the hydraulics
Damaged hydraulic unit of the tractor
Check condition of hydraulic unit of
the tractor
Damaged lifting cylinder
Replace sealing or other damaged
elements
Leaking cylinder Dirty oil in hydraulic unit of the tractor
Replace oil in hydraulic unit of the
tractor. Purchase repair kit of the
cylinder and replace damaged sealings
The rake leaves most
part of the swath
Bent tines of the rake or lack of them Exchange tines
Too low rotation speed Increase rpm
Wrong height of operation
Regulate operation height according
operator’s manual
Excesive vibration
during work
Damaged PTO shaft
Check the condition of PTO shaft and
if need be replace
Incomplete number of raking arms Install missing raking arms
Damaged raking tines Raking arms set too low
Set raking height properly with
adjusting crank or with trolley
(turf soils/ wet meadows / hard
meadows / soft meadows)
Contamination of raked
swath
Raking tines immersed too deep
Set bigger distance between raking
arms and the ground
Twisted raking tines Replace with new ones
Oil leak in gear Not tight assembly Examine tightness and check oil level.
Problem with raking
height adjustment
Soiled or damaged special screw
Clean special screw and if damaged,
replace the screw
Locked or not greased main pin on gear
Remove deposited soiling and then
apply fresh grease
Sheared pin locking the special screw
plate
Install new pin and check adjustment for
smooth operation
It is recommended to lower the gear in the trolley to its maximum after the season is
over
Loud operation of gear
Damaged bearings Replace damaged elements
Inadequate volume of oil in the box Check oil level and refill
Carousel-type gear
scraping sound, jamming
Damaged PTO shaft or disc wheel in
gear
Replace damaged elements
Unevenly wearing tyres
on working unit wheels
Bent wheel leg, axle of gear trolley or
longitudinal following plate
Replace elements
Bent steering bar for rake Correct convergence setting
Twisted PTO shaft tubes,
damaged joint
Not enough overlapping of PTO shaft
tubes
Mount new shaft or provide longer tubes
Plays on shaft joints Operation with accelerator pedal
Rake is not following the
travel behind tractor
Damaged wheel steering head or bent
steering bars
Replace damaged elements