PRONAR ZEFIR 85, Servicing Instruction

Page: 78 / 88

PRONAR
F. TECHNICAL MAINTENANCE OF THE
TRACTOR
PRONAR
68
OPERATION No. 26. Checking and adjusting parking brake
4
Parking brake (hand brake) 4 must be able to bear the tractor weight on the slope of 18% inclination ratio. In
case the brake cannot hold the tractor in-place, you must take adjusting action. To do so, you should
unscrew securing nut
1 located on the brake cable 3. Then adjust the cable length 3 with use of nut 2 so to
immobilize the tractor on the slope of 18% inclination ratio for approx. 3 teeth of the locking pawl. Screw the
securing nut tight on the cable
3 . Pull the lever 4 and meke sure the system works properly.
Tightness of the braking pneumatic system of trailers
Tightness of pneumatic system of the tractor may be verifyied in the following way:
•
after switching off the compressor and starting the engine, brind the pressure down to the value
0.60÷0.65 MPa (6.0÷6.5 kG/cm2) on manometer located on the dashboard of the tractor;
•
position elements of trailer brakes controll unit loosely and stop the engine;
•
wait 10 min, from the moment of stopping the engine the pressure drop on the manometer should not
be bigger than 2%, which is approx. 0,012÷0,013 MPa (0,12÷0,13 kG/cm2).
When inspecting tightness, the pneumatic system of the tractor must not be connected with the trailer
system (must not be loaded).
In case the pressure drop is higher than required, you must find the problem and resolve it.
OPERATION No. 27.
Lubricate bearings of steering spindle of the wheel reduction gear of the front
driving axle
Lubricate bearings of upper and lower steering spindle of the right
and left wheel reduction gear of the front driving axle (four lubrication
points). Lubricate with use of lubricator until emersion of the grease
on the lubricating nozzles.
OPERATION No. 28. Battery
Battery 1 is located in front under the bonnet. To access the battery you must lift the bonnet up.
3
2
1
In case of service battery you must screw out plugs of filler
openings and verify electrolyte level. It should range to 12
÷ 15
mm above the accumulator plates. If need be refill with distillated
water up to required level.
Inspect the condition of clamps and patency of air-holes in
plugs and if need be make them clean. Having clamps cleaned
and clipped secure them with technical vaseline.