Zetor Proxima CL 80, Operator'S Manual, Page: 171 / 210

Replacing the hoses of hydrostatic steering
Replacing coolant
Hoses need to be replaced four years from the date of
their manufacture (date is given 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 observed, 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 longn
(maximum time is 20 sec.), otherwise there is
excessive oil heating in hydrostatic steering circuit.
G719
Proceed in the following way:
1 - Open the heating valve and release the pressure cap
(C) on equalizing vessel.
2 - Drain the coolant from the radiator. Plug (A) is
accessible after lifting the bonnet.
3 - Drain the coolant from the block of engine. Drain cock
(B) is accessible after the disassembly of right side part.
4 - After draining the coolant close the drain valve and cap
(leave heating cock open).
5 - Fill the cooling system with a coolant to the neck in
equalizing vessel and close by pressure cap.
PCLPN096
6 - Start the engine and allow it to run for approximately
1 min.
7 - Fill the level of coolant in equalizing vessel to MAX.
gauge.
8 - Close the vessel with a pressure cap (C).
Always use the prescribed coolant to fill the
cooling system of the engine. Never fill the cooling
system with water. Using other than the prescribed
coolant may damage the engine.
PGPPN150
MAINTENANCE INSTRUCTIONS
170