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3.3.
Characteristics of hydraulics of arm
(Subject: KWT 550/650/651, Camel 900, Koliber 400/450)
Geared pumps power two independent circuits: machine's drive circuit with capacity of
50 l/min and hydraulic cylinders' drive circuit with capacity of 11 l/min. In machine's drive circuits
wires have ∅16 mm diameter, while in cylinders' control circuit ∅10 mm. Control of oil circulation
is possible owing to hydraulic distributors (3, 6). Oil tank (4) of adequate capacity. In arm-type
mower's hydraulic engine's drive circuit there is suction oil filter (5) with capacity of 70 l/min. On
gauge plate cylinder (8) there is sweep valve (7) mounted to protect the machine's arms from getting
overloaded (Fig. 21) – applies only to KWT 550, KWT 650 and Camel 900. Koliber 400 and Koliber
450 instead of gauge plate cylinder (8) both have overload breaker. Hydraulic cylinders (8-11) with
throttle choke valves (12) control the arm.
9
11
10
12
7
8
1. Hydraulic pumps
2. Hydraulic pumps' engine
3. Four-section distributor
4. Oil tank
5. Suction filter
6. Single-section distributor
7. Sweep valve
Operator's manual
12
3
Fig. 21. Arm-type mower's hydraulic drive diagram
6
2
4
8. Gauge plate cylinder
9. External arm cylinder
10. Internal arm cylinder
11. Cutterbar cylinder
12. Throttle check valve
13. Cooler
- 18 -
Arm
Flail head
13
5
1
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