Hyundai Robex 22-7, Service Manual

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9-4 Inspection and adjustment
9-4-1 Measuring the natural slew distance
1. Position of the machine
Maintain the hydraulic oil temperature at 50
±
5
°
C.
Make a slope or use a sleeper to incline the
machine by 12
°
. Set the attachment diagonally,
put a weight (W) in the bucket (filling the bucket
with soil), retract the arm cylinder to the minimum
length, make the boom parallel to the slope and
stop engine.
2. Measurement
Put a mark on the slew bearing outer race and the truck frame and measure the flow
rate (deviation rate) of 3 minutes. (Moving distance of slew bearing outer race)Valid
gear length
Unit mm or less
Standard value Allowance Weight W kg
100 200 108
9-4-2 Measuring the over slew distance after stopping
Maintain the oil temperature at 50
±
5
°
C while the engine is running at full speed. Stretch
the arm to the maximum length on a flat place. Make the boom joint pin (1) and arm bucket
pin (2) put on a horizontal line, put a weight(W) in the bucket (filling the bucket with soil),
slew the Machine by one turn and measure the over slew length (at bucket edge) after
stopping.
Unit : deg
Standard value Weight W kg
45 108
9-4-3 Measuring the required time for slewing
Extend the bucket cylinder to maximum length, empty the bucket and measure the
required time for slewing 5 turns following the first turn.
Unit : sec or less
Standard value Allowance
26
±
4 42
9-4
(1)
(2)
W
12
°