Initial Regulations; Safety Valves - SaMASZ KWT 550 Operator's Manual

Control assembly II (Fig. 62):
Four-section (58) or five-section distributor is responsible for tilt of the machine's arms,
extension rotation to proper mowing/transport position as well as settings of the cutterbar (control is
specified in chapter 5.5.1. Control panel operation). Sweep valve of distributor is set on 200 bar.

6.5.6. Initial regulations

Four hydraulic cylinders (1, 2, 4, 13) are equipped with throttle valves (60) (Fig. 64 and
Fig. 65), designed for regulation of oil flow. Their task is to adjust settings for any machine's
operator. Reducing oil flow improves operation of cylinders (eliminates jerks), but at the same time
slows down their operation. Setting is performed by turning the valve rotary handle:
Turning right – reduces capacity, improves operation, slows down the cylinder's operation.
Turning left – improves capacity, causes jerks, accelerates the cylinder's operation.
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Fig. 64. Adjustment of cylinders

6.5.7. Safety valves

Cylinder (2) is connected to twin locking valve (61) (Fig. 65). Its main task is to keep the
cylinder's position, in case of hydraulics failure. This valve is factory set and is not covered by
warranty.
Rotation cylinder (14) is connected to sweep valve (62) (Fig. 66), which protects working
arms from overloading. Increasing pressure in cylinder shall cause oil flow and arm deflection. Valve
adjustment is performed with bolt (63) located on the valve. Do not make any self adjustments of the
valve.
Keep in mind that hydraulic hoses (64) of cylinder (14) must be suitable to hold high pressure
(min 300 bar).
It should be borne in mind, that too big a deflection of the boom, changes the mower's position
to improper. Then the tractor should be stopped immediately and lever (B) switched in up position
Operator's manual
59
Fig. 63. Hydraulics control assembly
60
- 51 -
Arm
Flail head
61
60
Fig. 65. Cylinder protection
2