Changing The Hoses Of Hydrostatic Steering - Zetor 8621 Forterra turbo Operator's Manual

CHANGING THE HOSES OF HYDROSTATIC STEERING

Hydrostatic steering hoses must be exchanged after four years from time of
manufacturing (time is marked on hose surface) or after 3 600 hours of tractor
operation, eventually immediately after founding any symptoms of damage i.e. hose
sweating, local bulging, leakage of oil at fittings and on hose surface, mechanical
damage of hose surface up to steel wire cord or damage of yarn braid at low
pressure hoses).
Steering-ability is kept even in case of hydrostatic steering pump failure or if
the engine stops but the steering force on the steering wheel is bigger
Tractor can be driven into the nearest place for repair at reduced
transportation speed.
Don't keep the steering wheel in the stop steering angle positions (max. time
is 20 seconds), otherwise the oil is excessively heated in the hydrostatic
steering circuit.
MAINTENANCE INSTRUCTIONS
175
F 252