Dong Feng ZB 65, Operator'S Manual

Page: 49 / 55

Factory Direct Tractors
Mechanical Adjustment
5-3
are checked and tensioned to avoid oil leaking
from couplings and connections.
5.
Make sure dirt, dust and grit can’t contaminate
the hydraulic power steering system through
the reservoir, pump, oil lines and galleries when
carrying out maintenance.
6.
Power steering oil / fluid should be changed
regularly along with cleaning or replacing the
filter as per the service schedule.
7.
When using full lock do not hold the steering
wheels tight against the stops, back the steering
off about an inch or 25mm. When held hard on
full lock the hydraulic steering pump will load
up with pressure and activate the relief valve
making a recognisable noise, usually drowned
by the sound of the diesel motor. Consistently
holding the steering on full lock can damage the
hydraulic relief valve.
5.5 Brakes
The tractor is fitted with wet brakes that will wear
with time and usage requiring adjustment and
eventually replacement.
This will be noticed over time as extra pedal travel.
Sometimes uneven wearing will occur. When this is
noticed the brakes should be checked and adjusted
to bring them back into sync. Incorrect adjustment
can lead to brake dragging and accelerated wear
in the brake system.
5.5.1 Brake adjustment
When the brakes need adjusting, adjust both sides
using small increments and test.
Eventually some internal brake parts will wear out
and require replacing. This should be done by a
qualified trade technician. For your safety regularly
check and maintain the brakes to keep them
working well. Don’t wait till they are unbalanced,
out of adjustment and dangerous to use.
The wet brakes on this tractor are very effective and
will require minimal adjustment. Before adjusting
the brakes, thoroughly inspect the linkage system
and pivot points. Damaged or ceased parts need
to be rectified before any adjustment is carried
out. Brake adjustment consists of adjusting the
length of up pull rod (3) or lower pull rod (5) so
the brake pedals fully engage and lock the rear
wheels between 75 – 100mm of travel. If brake
pedal travel is too long, shorten either pull rod one
turn at a time. Check that the brakes are engaging
simultaneously when the pedals are interlocked.
Adjust as required.
5.6 Electrical system
The tractor is fitted with a 12V electrical system
and is negative-earth as per standard convention.
1.
Return spring
2.
Brake pedal
3.
Up pull rod
4.
Adjusting nut
5. Lower pull rod
6.
Adjusting nut
7.
Park brake control lever
Fig. 5-5-1 DongFeng ZB 65 / 85 Brake Adjustment