Zetor Major 80, Руководство оператора

Страница: 128 / 157

128
MAINTENANCE INSTRUCTIONS
G719
REPLACING THE HOSES OF HYDROSTATIC STEERING
Hoses need to be replaced four years from the date of their manufacture (date is giv-
en on their surface) or after working 3 500 hours with tractor, or right after learning
the symptoms of their damage (hose, local swelling, penetration of working medium
around endpoints and hose surface, wrapping damage by mechanical smear to a
metallic body, damage to external buckle braid with low-pressure hoses).
If a pump gets damaged or if the engine is at standstill, steerability is ob-
served, but the force on the steering wheel increases. It is possible to get to
the nearest place where repairs can be done with lowered speed.
The steering wheel must not be held in the positions of extreme wheel locks
for long (maximum time is 20 sec.), otherwise there is excessive oil heating in
hydrostatic steering circuit.